]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/activities/MainWebViewActivity.java
Use FQDNs for some file names. https://redmine.stoutner.com/issues/680
[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
index d330771672ccf83bd48954a1f8ca979dc0a2db48..800b3b044b5c618c3a96e4376c2bbea784e700c5 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2015-2018 Soren Stoutner <soren@stoutner.com>.
+ * Copyright © 2015-2021 Soren Stoutner <soren@stoutner.com>.
  *
  * Download cookie code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
  *
 package com.stoutner.privacybrowser.activities;
 
 import android.annotation.SuppressLint;
-import android.app.DialogFragment;
+import android.app.Activity;
+import android.app.Dialog;
 import android.app.DownloadManager;
+import android.app.SearchManager;
+import android.content.ActivityNotFoundException;
 import android.content.BroadcastReceiver;
 import android.content.ClipData;
 import android.content.ClipboardManager;
@@ -31,6 +34,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.database.Cursor;
 import android.graphics.Bitmap;
@@ -41,36 +45,20 @@ import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.net.http.SslCertificate;
 import android.net.http.SslError;
+import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
+import android.os.Message;
 import android.preference.PreferenceManager;
 import android.print.PrintDocumentAdapter;
 import android.print.PrintManager;
-import android.support.annotation.NonNull;
-import android.support.design.widget.CoordinatorLayout;
-import android.support.design.widget.FloatingActionButton;
-import android.support.design.widget.NavigationView;
-import android.support.design.widget.Snackbar;
-import android.support.v4.content.ContextCompat;
-// `ShortcutInfoCompat`, `ShortcutManagerCompat`, and `IconCompat` can be switched to the non-compat version once API >= 26.
-import android.support.v4.content.pm.ShortcutInfoCompat;
-import android.support.v4.content.pm.ShortcutManagerCompat;
-import android.support.v4.graphics.drawable.IconCompat;
-import android.support.v4.view.GravityCompat;
-import android.support.v4.widget.DrawerLayout;
-import android.support.v4.widget.SwipeRefreshLayout;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.ActionBarDrawerToggle;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.app.AppCompatDialogFragment;
-import android.support.v7.widget.Toolbar;
 import android.text.Editable;
 import android.text.Spanned;
 import android.text.TextWatcher;
 import android.text.style.ForegroundColorSpan;
-import android.util.Log;
 import android.util.Patterns;
+import android.util.TypedValue;
 import android.view.ContextMenu;
 import android.view.GestureDetector;
 import android.view.KeyEvent;
@@ -84,13 +72,17 @@ import android.view.inputmethod.InputMethodManager;
 import android.webkit.CookieManager;
 import android.webkit.HttpAuthHandler;
 import android.webkit.SslErrorHandler;
+import android.webkit.ValueCallback;
 import android.webkit.WebBackForwardList;
 import android.webkit.WebChromeClient;
 import android.webkit.WebResourceResponse;
+import android.webkit.WebSettings;
 import android.webkit.WebStorage;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.webkit.WebViewDatabase;
+import android.widget.ArrayAdapter;
+import android.widget.CheckBox;
 import android.widget.CursorAdapter;
 import android.widget.EditText;
 import android.widget.FrameLayout;
@@ -102,280 +94,204 @@ import android.widget.RadioButton;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 
-import com.stoutner.privacybrowser.BannerAd;
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.ActionBarDrawerToggle;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatDelegate;
+import androidx.appcompat.widget.Toolbar;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
+import androidx.core.content.res.ResourcesCompat;
+import androidx.core.view.GravityCompat;
+import androidx.drawerlayout.widget.DrawerLayout;
+import androidx.fragment.app.DialogFragment;
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
+import androidx.viewpager.widget.ViewPager;
+import androidx.webkit.WebSettingsCompat;
+import androidx.webkit.WebViewFeature;
+
+import com.google.android.material.appbar.AppBarLayout;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.navigation.NavigationView;
+import com.google.android.material.snackbar.Snackbar;
+import com.google.android.material.tabs.TabLayout;
+
 import com.stoutner.privacybrowser.BuildConfig;
 import com.stoutner.privacybrowser.R;
-import com.stoutner.privacybrowser.dialogs.AddDomainDialog;
+import com.stoutner.privacybrowser.adapters.WebViewPagerAdapter;
+import com.stoutner.privacybrowser.asynctasks.GetHostIpAddresses;
+import com.stoutner.privacybrowser.asynctasks.PopulateBlocklists;
+import com.stoutner.privacybrowser.asynctasks.PrepareSaveDialog;
+import com.stoutner.privacybrowser.asynctasks.SaveUrl;
+import com.stoutner.privacybrowser.asynctasks.SaveWebpageImage;
+import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
-import com.stoutner.privacybrowser.dialogs.DownloadImageDialog;
-import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
+import com.stoutner.privacybrowser.dialogs.FontSizeDialog;
 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
-import com.stoutner.privacybrowser.dialogs.PinnedSslCertificateMismatchDialog;
+import com.stoutner.privacybrowser.dialogs.OpenDialog;
+import com.stoutner.privacybrowser.dialogs.ProxyNotInstalledDialog;
+import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog;
+import com.stoutner.privacybrowser.dialogs.SaveWebpageDialog;
+import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
+import com.stoutner.privacybrowser.dialogs.WaitingForProxyDialog;
+import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
+import com.stoutner.privacybrowser.helpers.AdHelper;
+import com.stoutner.privacybrowser.helpers.BlocklistHelper;
 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
-import com.stoutner.privacybrowser.helpers.OrbotProxyHelper;
-import com.stoutner.privacybrowser.dialogs.DownloadFileDialog;
-import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
+import com.stoutner.privacybrowser.helpers.ProxyHelper;
+import com.stoutner.privacybrowser.views.NestedScrollWebView;
 
-import java.io.BufferedReader;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.IOException;
-import java.io.InputStreamReader;
+import java.io.InputStream;
+import java.io.OutputStream;
 import java.io.UnsupportedEncodingException;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLDecoder;
 import java.net.URLEncoder;
+import java.text.NumberFormat;
+import java.util.ArrayList;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.HashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
-import java.util.regex.Pattern;
-
-// We need to use AppCompatActivity from android.support.v7.app.AppCompatActivity to have access to the SupportActionBar until the minimum API is >= 21.
-public class MainWebViewActivity extends AppCompatActivity implements AddDomainDialog.AddDomainListener, CreateBookmarkDialog.CreateBookmarkListener,
-        CreateBookmarkFolderDialog.CreateBookmarkFolderListener, CreateHomeScreenShortcutDialog.CreateHomeScreenSchortcutListener, DownloadFileDialog.DownloadFileListener,
-        DownloadImageDialog.DownloadImageListener, EditBookmarkDialog.EditBookmarkListener, EditBookmarkFolderDialog.EditBookmarkFolderListener, HttpAuthenticationDialog.HttpAuthenticationListener,
-        NavigationView.OnNavigationItemSelectedListener, PinnedSslCertificateMismatchDialog.PinnedSslCertificateMismatchListener, SslCertificateErrorDialog.SslCertificateErrorListener,
-        UrlHistoryDialog.UrlHistoryListener {
-
-    // `darkTheme` is public static so it can be accessed from `AboutActivity`, `GuideActivity`, `AddDomainDialog`, `SettingsActivity`, `DomainsActivity`, `DomainsListFragment`, `BookmarksActivity`,
-    // `BookmarksDatabaseViewActivity`, `CreateBookmarkDialog`, `CreateBookmarkFolderDialog`, `DownloadFileDialog`, `DownloadImageDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`,
-    // `EditBookmarkDatabaseViewDialog`, `HttpAuthenticationDialog`, `MoveToFolderDialog`, `SslCertificateErrorDialog`, `UrlHistoryDialog`, `ViewSslCertificateDialog`, `CreateHomeScreenShortcutDialog`,
-    //  and `OrbotProxyHelper`. It is also used in `onCreate()`, `applyAppSettings()`, `applyDomainSettings()`, and `updatePrivacyIcons()`.
-    public static boolean darkTheme;
-
-    // `favoriteIconBitmap` is public static so it can be accessed from `CreateHomeScreenShortcutDialog`, `BookmarksActivity`, `BookmarksDatabaseViewActivity`, `CreateBookmarkDialog`,
-    // `CreateBookmarkFolderDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `EditBookmarkDatabaseViewDialog`, and `ViewSslCertificateDialog`.  It is also used in `onCreate()`,
-    // `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onCreateHomeScreenShortcutCreate()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `applyDomainSettings()`.
-    public static Bitmap favoriteIconBitmap;
-
-    // `formattedUrlString` is public static so it can be accessed from `BookmarksActivity`, `CreateBookmarkDialog`, and `AddDomainDialog`.
-    // It is also used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onCreateHomeScreenShortcutCreate()`, and `loadUrlFromTextBox()`.
-    public static String formattedUrlString;
-
-    // `sslCertificate` is public static so it can be accessed from `DomainsActivity`, `DomainsListFragment`, `DomainSettingsFragment`, `PinnedSslCertificateMismatchDialog`,
-    // and `ViewSslCertificateDialog`.  It is also used in `onCreate()`.
-    public static SslCertificate sslCertificate;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 
-    // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`.
-    public static String orbotStatus;
+public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
+        EditBookmarkFolderDialog.EditBookmarkFolderListener, FontSizeDialog.UpdateFontSizeListener, NavigationView.OnNavigationItemSelectedListener, OpenDialog.OpenListener,
+        PinnedMismatchDialog.PinnedMismatchListener, PopulateBlocklists.PopulateBlocklistsListener, SaveWebpageDialog.SaveWebpageListener, UrlHistoryDialog.NavigateHistoryListener,
+        WebViewTabFragment.NewTabListener {
 
-    // `webViewTitle` is public static so it can be accessed from `CreateBookmarkDialog` and `CreateHomeScreenShortcutDialog`.  It is also used in `onCreate()`.
-    public static String webViewTitle;
+    // The executor service handles background tasks.  It is accessed from `ViewSourceActivity`.
+    public static ExecutorService executorService = Executors.newFixedThreadPool(4);
 
-    // `appliedUserAgentString` is public static so it can be accessed from `ViewSourceActivity`.  It is also used in `applyDomainSettings()`.
-    public static String appliedUserAgentString;
+    // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxy()`.
+    public static String orbotStatus = "unknown";
 
-    // `displayWebpageImagesBoolean` is public static so it can be accessed from `DomainSettingsFragment`.  It is also used in `applyAppSettings()` and `applyDomainSettings()`.
-    public static boolean displayWebpageImagesBoolean;
-
-    // `reloadOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`
-    public static boolean reloadOnRestart;
-
-    // `reloadUrlOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`.
-    public static boolean loadUrlOnRestart;
+    // The WebView pager adapter is accessed from `HttpAuthenticationDialog`, `PinnedMismatchDialog`, and `SslCertificateErrorDialog`.  It is also used in `onCreate()`, `onResume()`, and `addTab()`.
+    public static WebViewPagerAdapter webViewPagerAdapter;
 
     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
     public static boolean restartFromBookmarksActivity;
 
-    // `easyListVersion` is public static so it can be accessed from `AboutTabFragment`.  It is also used in `onCreate()`.
-    public static String easyListVersion;
-
     // `currentBookmarksFolder` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onCreate()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
     // `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
     public static String currentBookmarksFolder;
 
-    // `domainSettingsDatabaseId` is public static so it can be accessed from `PinnedSslCertificateMismatchDialog`.  It is also used in `onCreate()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
-    public static int domainSettingsDatabaseId;
-
-    // The pinned domain SSL Certificate variables are public static so they can be accessed from `PinnedSslCertificateMismatchDialog`.  They are also used in `onCreate()` and `applyDomainSettings()`.
-    public static String pinnedDomainSslIssuedToCNameString;
-    public static String pinnedDomainSslIssuedToONameString;
-    public static String pinnedDomainSslIssuedToUNameString;
-    public static String pinnedDomainSslIssuedByCNameString;
-    public static String pinnedDomainSslIssuedByONameString;
-    public static String pinnedDomainSslIssuedByUNameString;
-    public static Date pinnedDomainSslStartDate;
-    public static Date pinnedDomainSslEndDate;
-
-
-    // `appBar` is used in `onCreate()`, `onOptionsItemSelected()`, `closeFindOnPage()`, and `applyAppSettings()`.
-    private ActionBar appBar;
-
-    // `navigatingHistory` is used in `onCreate()`, `onNavigationItemSelected()`, `onSslMismatchBack()`, and `applyDomainSettings()`.
-    private boolean navigatingHistory;
-
-    // `favoriteIconDefaultBitmap` is used in `onCreate()` and `applyDomainSettings`.
-    private Bitmap favoriteIconDefaultBitmap;
-
-    // `drawerLayout` is used in `onCreate()`, `onNewIntent()`, `onBackPressed()`, and `onRestart()`.
-    private DrawerLayout drawerLayout;
-
-    // `rootCoordinatorLayout` is used in `onCreate()` and `applyAppSettings()`.
-    private CoordinatorLayout rootCoordinatorLayout;
-
-    // `mainWebView` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
-    // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, and `setDisplayWebpageImages()`.
-    private WebView mainWebView;
-
-    // `fullScreenVideoFrameLayout` is used in `onCreate()` and `onConfigurationChanged()`.
-    private FrameLayout fullScreenVideoFrameLayout;
-
-    // `swipeRefreshLayout` is used in `onCreate()`, `onPrepareOptionsMenu`, and `onRestart()`.
-    private SwipeRefreshLayout swipeRefreshLayout;
-
-    // `urlAppBarRelativeLayout` is used in `onCreate()` and `applyDomainSettings()`.
-    private RelativeLayout urlAppBarRelativeLayout;
-
-    // `favoriteIconImageView` is used in `onCreate()` and `applyDomainSettings()`
-    private ImageView favoriteIconImageView;
-
-    // `cookieManager` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`, `loadUrlFromTextBox()`, `onDownloadImage()`, `onDownloadFile()`, and `onRestart()`.
-    private CookieManager cookieManager;
+    // The user agent constants are public static so they can be accessed from `SettingsFragment`, `DomainsActivity`, and `DomainSettingsFragment`.
+    public final static int UNRECOGNIZED_USER_AGENT = -1;
+    public final static int SETTINGS_WEBVIEW_DEFAULT_USER_AGENT = 1;
+    public final static int SETTINGS_CUSTOM_USER_AGENT = 12;
+    public final static int DOMAINS_SYSTEM_DEFAULT_USER_AGENT = 0;
+    public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
+    public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
+
+    // Define the start activity for result request codes.  The public static entries are accessed from `OpenDialog()` and `SaveWebpageDialog()`.
+    private final int BROWSE_FILE_UPLOAD_REQUEST_CODE = 0;
+    public final static int BROWSE_OPEN_REQUEST_CODE = 1;
+    public final static int BROWSE_SAVE_WEBPAGE_REQUEST_CODE = 2;
+
+    // The proxy mode is public static so it can be accessed from `ProxyHelper()`.
+    // It is also used in `onRestart()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxy()`.
+    // It will be updated in `applyAppSettings()`, but it needs to be initialized here or the first run of `onPrepareOptionsMenu()` crashes.
+    public static String proxyMode = ProxyHelper.NONE;
+
+    // Define the saved instance state constants.
+    private final String SAVED_STATE_ARRAY_LIST = "saved_state_array_list";
+    private final String SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST = "saved_nested_scroll_webview_state_array_list";
+    private final String SAVED_TAB_POSITION = "saved_tab_position";
+    private final String PROXY_MODE = "proxy_mode";
+
+    // Define the saved instance state variables.
+    private ArrayList<Bundle> savedStateArrayList;
+    private ArrayList<Bundle> savedNestedScrollWebViewStateArrayList;
+    private int savedTabPosition;
+    private String savedProxyMode;
+
+    // Define the class variables.
+    @SuppressWarnings("rawtypes")
+    AsyncTask populateBlocklists;
+
+    // The current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
+    // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, `applyProxy()`, and `applyDomainSettings()`.
+    private NestedScrollWebView currentWebView;
 
     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
     private final Map<String, String> customHeaders = new HashMap<>();
 
-    // `javaScriptEnabled` is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyDomainSettings()`, and `updatePrivacyIcons()`.
-    private boolean javaScriptEnabled;
-
-    // `firstPartyCookiesEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onDownloadImage()`, `onDownloadFile()`, and `applyDomainSettings()`.
-    private boolean firstPartyCookiesEnabled;
-
-    // `thirdPartyCookiesEnabled` used in `onCreate()`, `onPrepareOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
-    private boolean thirdPartyCookiesEnabled;
-
-    // `domStorageEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
-    private boolean domStorageEnabled;
-
-    // `saveFormDataEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
-    private boolean saveFormDataEnabled;
-
-    // `nightMode` is used in `onCreate()` and  `applyDomainSettings()`.
-    private boolean nightMode;
-
-    // `swipeToRefreshEnabled` is used in `onPrepareOptionsMenu()` and `applyAppSettings()`.
-    private boolean swipeToRefreshEnabled;
-
-    // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyAppSettings()`.
-    private String homepage;
-
-    // `searchURL` is used in `loadURLFromTextBox()` and `applyAppSettings()`.
+    // The search URL is set in `applyAppSettings()` and used in `onNewIntent()`, `loadUrlFromTextBox()`, `initializeApp()`, and `initializeWebView()`.
     private String searchURL;
 
-    // `adBlockerEnabled` is used in `onCreate()` and `applyAppSettings()`.
-    private boolean adBlockerEnabled;
+    // The blocklists are populated in `finishedPopulatingBlocklists()` and accessed from `initializeWebView()`.
+    private ArrayList<List<String[]>> easyList;
+    private ArrayList<List<String[]>> easyPrivacy;
+    private ArrayList<List<String[]>> fanboysAnnoyanceList;
+    private ArrayList<List<String[]>> fanboysSocialList;
+    private ArrayList<List<String[]>> ultraList;
+    private ArrayList<List<String[]>> ultraPrivacy;
 
-    // `privacyBrowserRuntime` is used in `onCreate()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
-    private Runtime privacyBrowserRuntime;
+    // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
+    private String webViewDefaultUserAgent;
 
-    // `incognitoModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
+    // The incognito mode is set in `applyAppSettings()` and used in `initializeWebView()`.
     private boolean incognitoModeEnabled;
 
-    // `fullScreenBrowsingModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
+    // The full screen browsing mode tracker is set it `applyAppSettings()` and used in `initializeWebView()`.
     private boolean fullScreenBrowsingModeEnabled;
 
     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
     private boolean inFullScreenBrowsingMode;
 
-    // `hideSystemBarsOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
-    private boolean hideSystemBarsOnFullscreen;
+    // The app bar trackers are set in `applyAppSettings()` and used in `initializeWebView()`.
+    private boolean hideAppBar;
+    private boolean scrollAppBar;
 
-    // `translucentNavigationBarOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
-    private boolean translucentNavigationBarOnFullscreen;
+    // The loading new intent tracker is set in `onNewIntent()` and used in `setCurrentWebView()`.
+    private boolean loadingNewIntent;
 
     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
     private boolean reapplyDomainSettingsOnRestart;
 
-    // `currentDomainName` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onAddDomain()`, and `applyDomainSettings()`.
-    private String currentDomainName;
-
-    // `ignorePinnedSslCertificateForDomain` is used in `onCreate()`, `onSslMismatchProceed()`, and `applyDomainSettings()`.
-    private boolean ignorePinnedSslCertificate;
-
-    // `waitingForOrbot` is used in `onCreate()` and `applyAppSettings()`.
-    private boolean waitingForOrbot;
-
-    // `domainSettingsApplied` is used in `prepareOptionsMenu()`, `applyDomainSettings()`, and `setDisplayWebpageImages()`.
-    private boolean domainSettingsApplied;
-
-    // `displayWebpageImagesInt` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
-    private int displayWebpageImagesInt;
-
-    // `onTheFlyDisplayImagesSet` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
-    private boolean onTheFlyDisplayImagesSet;
+    // `reapplyAppSettingsOnRestart` is used in `onNavigationItemSelected()` and `onRestart()`.
+    private boolean reapplyAppSettingsOnRestart;
 
-    // `waitingForOrbotData` is used in `onCreate()` and `applyAppSettings()`.
-    private String waitingForOrbotHTMLString;
+    // `displayingFullScreenVideo` is used in `onCreate()` and `onResume()`.
+    private boolean displayingFullScreenVideo;
 
-    // `privateDataDirectoryString` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`.
-    private String privateDataDirectoryString;
+    // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
+    private BroadcastReceiver orbotStatusBroadcastReceiver;
 
-    // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private LinearLayout findOnPageLinearLayout;
-
-    // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private EditText findOnPageEditText;
-
-    // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
-    private Menu mainMenu;
-
-    // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
-    private ActionBarDrawerToggle drawerToggle;
+    // The waiting for proxy boolean is used in `onResume()`, `initializeApp()` and `applyProxy()`.
+    private boolean waitingForProxy = false;
 
-    // `supportAppBar` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private Toolbar supportAppBar;
-
-    // `urlTextBox` is used in `onCreate()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, `loadUrl()`, and `highlightUrlText()`.
-    private EditText urlTextBox;
+    // The action bar drawer toggle is initialized in `onCreate()` and used in `onResume()`.
+    private ActionBarDrawerToggle actionBarDrawerToggle;
 
     // The color spans are used in `onCreate()` and `highlightUrlText()`.
     private ForegroundColorSpan redColorSpan;
     private ForegroundColorSpan initialGrayColorSpan;
     private ForegroundColorSpan finalGrayColorSpan;
 
-    // `adView` is used in `onCreate()` and `onConfigurationChanged()`.
-    private View adView;
-
-    // `sslErrorHandler` is used in `onCreate()`, `onSslErrorCancel()`, and `onSslErrorProceed`.
-    private SslErrorHandler sslErrorHandler;
-
-    // `httpAuthHandler` is used in `onCreate()`, `onHttpAuthenticationCancel()`, and `onHttpAuthenticationProceed()`.
-    private static HttpAuthHandler httpAuthHandler;
-
-    // `inputMethodManager` is used in `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `closeFindOnPage()`.
-    private InputMethodManager inputMethodManager;
-
-    // `mainWebViewRelativeLayout` is used in `onCreate()` and `onNavigationItemSelected()`.
-    private RelativeLayout mainWebViewRelativeLayout;
-
-    // `urlIsLoading` is used in `onCreate()`, `loadUrl()`, and `applyDomainSettings()`.
-    private boolean urlIsLoading;
-
-    // `pinnedDomainSslCertificate` is used in `onCreate()` and `applyDomainSettings()`.
-    private boolean pinnedDomainSslCertificate;
-
-    // `bookmarksDatabaseHelper` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
+    // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
+    // and `loadBookmarksFolder()`.
     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
 
-    // `bookmarksListView` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, and `loadBookmarksFolder()`.
-    private ListView bookmarksListView;
-
-    // `bookmarksTitleTextView` is used in `onCreate()` and `loadBookmarksFolder()`.
-    private TextView bookmarksTitleTextView;
-
-    // `bookmarksCursor` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
+    // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
     private Cursor bookmarksCursor;
 
     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
@@ -384,3852 +300,6133 @@ public class MainWebViewActivity extends AppCompatActivity implements AddDomainD
     // `oldFolderNameString` is used in `onCreate()` and `onSaveEditBookmarkFolder()`.
     private String oldFolderNameString;
 
-    @Override
-    // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.  The whole premise of Privacy Browser is built around an understanding of these dangers.
-    @SuppressLint({"SetJavaScriptEnabled"})
-    // Remove Android Studio's warning about deprecations.  We have to use the deprecated `getColor()` until API >= 23.
-    @SuppressWarnings("deprecation")
-    protected void onCreate(Bundle savedInstanceState) {
-        // Get a handle for `sharedPreferences`.  `this` references the current context.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+    // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
+    private ValueCallback<Uri[]> fileChooserCallback;
 
-        // Get the theme preference.
-        darkTheme = sharedPreferences.getBoolean("dark_theme", false);
+    // The default progress view offsets are set in `onCreate()` and used in `initializeWebView()`.
+    private int appBarHeight;
+    private int defaultProgressViewStartOffset;
+    private int defaultProgressViewEndOffset;
 
-        // Set the activity theme.
-        if (darkTheme) {
-            setTheme(R.style.PrivacyBrowserDark);
-        } else {
-            setTheme(R.style.PrivacyBrowserLight);
-        }
+    // The URL sanitizers are set in `applyAppSettings()` and used in `sanitizeUrl()`.
+    private boolean sanitizeGoogleAnalytics;
+    private boolean sanitizeFacebookClickIds;
+    private boolean sanitizeTwitterAmpRedirects;
 
-        // Run the default commands.
-        super.onCreate(savedInstanceState);
+    // Declare the class views.
+    private FrameLayout rootFrameLayout;
+    private DrawerLayout drawerLayout;
+    private RelativeLayout mainContentRelativeLayout;
+    private AppBarLayout appBarLayout;
+    private Toolbar toolbar;
+    private RelativeLayout urlRelativeLayout;
+    private EditText urlEditText;
+    private ActionBar actionBar;
+    private LinearLayout findOnPageLinearLayout;
+    private LinearLayout tabsLinearLayout;
+    private TabLayout tabLayout;
+    private SwipeRefreshLayout swipeRefreshLayout;
+    private ViewPager webViewPager;
+    private FrameLayout fullScreenVideoFrameLayout;
 
-        Log.i("BlockLists", "Begin populating block lists.");
-
-        // Initialize the block lists.
-        List<String> mainWhiteList = new LinkedList<>();
-        List<String[]> multiEntryWhiteList = new LinkedList<>();
-        List<String[]> domainWhiteList = new LinkedList<>();
-        List<String[]> thirdPartyDomainWhiteList = new LinkedList<>();
-        List<String> mainBlockList = new LinkedList<>();
-        List<String> initialBlockList = new LinkedList<>();
-        List<String> finalBlockList = new LinkedList<>();
-        List<String> thirdPartyBlockList = new LinkedList<>();
-        List<String> thirdPartyInitialBlockList = new LinkedList<>();
-        List<String[]> multiEntryBlockList = new LinkedList<>();
-        List<String[]> multiEntryInitialBlockList = new LinkedList<>();
-        List<String[]> multiEntryFinalBlockList = new LinkedList<>();
-        List<String[]> domainBlockList = new LinkedList<>();
-        List<String[]> domainInitialBlockList = new LinkedList<>();
-        List<String[]> domainFinalBlockList = new LinkedList<>();
-        List<String[]> domainRegularExpressionBlockList = new LinkedList<>();
-        List<String[]> thirdPartyMultiEntryBlockList = new LinkedList<>();
-        List<String[]> thirdPartyMultiEntryInitialBlockList = new LinkedList<>();
-        List<String[]> thirdPartyDomainBlockList = new LinkedList<>();
-        List<String> regularExpressionBlockList = new LinkedList<>();
-        List<String> thirdPartyRegularExpressionBlockList = new LinkedList<>();
-
-        // Populate the block lists.
-        try {
-            // Load `easylist.txt` into a `BufferedReader`.
-            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(getAssets().open("easylist.txt")));
+    // Declare the class menus.
+    private Menu optionsMenu;
+
+    // Declare the class menu items.
+    private MenuItem navigationBackMenuItem;
+    private MenuItem navigationForwardMenuItem;
+    private MenuItem navigationHistoryMenuItem;
+    private MenuItem navigationRequestsMenuItem;
+    private MenuItem optionsPrivacyMenuItem;
+    private MenuItem optionsRefreshMenuItem;
+    private MenuItem optionsFirstPartyCookiesMenuItem;
+    private MenuItem optionsThirdPartyCookiesMenuItem;
+    private MenuItem optionsDomStorageMenuItem;
+    private MenuItem optionsSaveFormDataMenuItem;
+    private MenuItem optionsClearDataMenuItem;
+    private MenuItem optionsClearCookiesMenuItem;
+    private MenuItem optionsClearDomStorageMenuItem;
+    private MenuItem optionsClearFormDataMenuItem;
+    private MenuItem optionsBlocklistsMenuItem;
+    private MenuItem optionsEasyListMenuItem;
+    private MenuItem optionsEasyPrivacyMenuItem;
+    private MenuItem optionsFanboysAnnoyanceListMenuItem;
+    private MenuItem optionsFanboysSocialBlockingListMenuItem;
+    private MenuItem optionsUltraListMenuItem;
+    private MenuItem optionsUltraPrivacyMenuItem;
+    private MenuItem optionsBlockAllThirdPartyRequestsMenuItem;
+    private MenuItem optionsProxyMenuItem;
+    private MenuItem optionsProxyNoneMenuItem;
+    private MenuItem optionsProxyTorMenuItem;
+    private MenuItem optionsProxyI2pMenuItem;
+    private MenuItem optionsProxyCustomMenuItem;
+    private MenuItem optionsUserAgentMenuItem;
+    private MenuItem optionsUserAgentPrivacyBrowserMenuItem;
+    private MenuItem optionsUserAgentWebViewDefaultMenuItem;
+    private MenuItem optionsUserAgentFirefoxOnAndroidMenuItem;
+    private MenuItem optionsUserAgentChromeOnAndroidMenuItem;
+    private MenuItem optionsUserAgentSafariOnIosMenuItem;
+    private MenuItem optionsUserAgentFirefoxOnLinuxMenuItem;
+    private MenuItem optionsUserAgentChromiumOnLinuxMenuItem;
+    private MenuItem optionsUserAgentFirefoxOnWindowsMenuItem;
+    private MenuItem optionsUserAgentChromeOnWindowsMenuItem;
+    private MenuItem optionsUserAgentEdgeOnWindowsMenuItem;
+    private MenuItem optionsUserAgentInternetExplorerOnWindowsMenuItem;
+    private MenuItem optionsUserAgentSafariOnMacosMenuItem;
+    private MenuItem optionsUserAgentCustomMenuItem;
+    private MenuItem optionsSwipeToRefreshMenuItem;
+    private MenuItem optionsWideViewportMenuItem;
+    private MenuItem optionsDisplayImagesMenuItem;
+    private MenuItem optionsDarkWebViewMenuItem;
+    private MenuItem optionsFontSizeMenuItem;
+    private MenuItem optionsAddOrEditDomainMenuItem;
 
-            // Create a string for storing the block list entries.
-            String blockListEntry;
+    @Override
+    // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
+    @SuppressLint("ClickableViewAccessibility")
+    protected void onCreate(Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onCreate(savedInstanceState);
 
-            // Parse EasyList.
-            while ((blockListEntry = bufferedReader.readLine()) != null) {
-                // Remove any `^` from the block list entry.  Privacy Browser does not process them in the interest of efficiency.
-                blockListEntry = blockListEntry.replace("^", "");
+        // Check to see if the activity has been restarted.
+        if (savedInstanceState != null) {
+            // Store the saved instance state variables.
+            savedStateArrayList = savedInstanceState.getParcelableArrayList(SAVED_STATE_ARRAY_LIST);
+            savedNestedScrollWebViewStateArrayList = savedInstanceState.getParcelableArrayList(SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST);
+            savedTabPosition = savedInstanceState.getInt(SAVED_TAB_POSITION);
+            savedProxyMode = savedInstanceState.getString(PROXY_MODE);
+        }
 
-                //noinspection StatementWithEmptyBody
-                if (blockListEntry.contains("##") || blockListEntry.contains("#?#") || blockListEntry.contains("#@#") || blockListEntry.startsWith("[")) {
-                    // Entries that contain `##`, `#?#`, and `#@#` are for hiding elements in the main page's HTML.  Entries that start with `[` describe the AdBlock compatibility level.
+        // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
+        PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
 
-                    // Do nothing.  Privacy Browser does not currently use these entries.
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    //Log.i("BlackLists", "Not added: " + adBlockerEntry);
-                } else if (blockListEntry.startsWith("!")){  //  Entries that begin with `!` are comments.
-                    if (blockListEntry.startsWith("! Version:")) {
-                        // Store the EasyList version number.
-                        easyListVersion = blockListEntry.substring(11);
-                    }
+        // Get the screenshot preference.
+        String appTheme = sharedPreferences.getString("app_theme", getString(R.string.app_theme_default_value));
+        boolean allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false);
+
+        // Get the theme entry values string array.
+        String[] appThemeEntryValuesStringArray = getResources().getStringArray(R.array.app_theme_entry_values);
+
+        // Set the app theme according to the preference.  A switch statement cannot be used because the theme entry values string array is not a compile time constant.
+        if (appTheme.equals(appThemeEntryValuesStringArray[1])) {  // The light theme is selected.
+            // Apply the light theme.
+            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
+        } else if (appTheme.equals(appThemeEntryValuesStringArray[2])) {  // The dark theme is selected.
+            // Apply the dark theme.
+            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
+        } else {  // The system default theme is selected.
+            if (Build.VERSION.SDK_INT >= 28) {  // The system default theme is supported.
+                // Follow the system default theme.
+                AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM);
+            } else {  // The system default theme is not supported.
+                // Follow the battery saver mode.
+                AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY);
+            }
+        }
 
-                    //Log.i("BlackLists", "Not added: " + adBlockerEntry);
-                } else if (blockListEntry.startsWith("@@")) {  // Entries that begin with `@@` are whitelists.
-                    // Remove the `@@`
-                    blockListEntry = blockListEntry.substring(2);
+        // Disable screenshots if not allowed.
+        if (!allowScreenshots) {
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
+        }
 
-                    // Strip out an initial `||`  Privacy Browser doesn't differentiate against items that only match against the end of the domain name.
-                    if (blockListEntry.startsWith("||")) {
-                        blockListEntry = blockListEntry.substring(2);
-                    }
+        // Enable the drawing of the entire webpage.  This makes it possible to save a website image.  This must be done before anything else happens with the WebView.
+        if (Build.VERSION.SDK_INT >= 21) {
+            WebView.enableSlowWholeDocumentDraw();
+        }
 
-                    // TODO
+        // Set the theme.
+        setTheme(R.style.PrivacyBrowser);
 
-                    // mainWhiteList.add(blockListEntry);
+        // Set the content view.
+        setContentView(R.layout.main_framelayout);
 
-                    // Log.i("BlockLists", "Main white list added: " + blockListEntry);
-                } else if (blockListEntry.endsWith("|")){  // Entries that end with `|` match against the end of the URL.
-                    // Strip out the final "|"
-                    blockListEntry = blockListEntry.substring(0, blockListEntry.length() - 1);
+        // Get handles for the views.
+        rootFrameLayout = findViewById(R.id.root_framelayout);
+        drawerLayout = findViewById(R.id.drawerlayout);
+        mainContentRelativeLayout = findViewById(R.id.main_content_relativelayout);
+        appBarLayout = findViewById(R.id.appbar_layout);
+        toolbar = findViewById(R.id.toolbar);
+        findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
+        tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
+        tabLayout = findViewById(R.id.tablayout);
+        swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+        webViewPager = findViewById(R.id.webviewpager);
+        fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
 
-                    // Strip out any initial `||`.  They are redundant in this case because the block list entry is being matched against the end of the URL.
-                    if (blockListEntry.startsWith("||")) {
-                        blockListEntry = blockListEntry.substring(2);
-                    }
+        // Get a handle for the navigation view.
+        NavigationView navigationView = findViewById(R.id.navigationview);
 
-                    if (blockListEntry.contains("*")) {  // Process a double final entry.
-                        int wildcardIndex = blockListEntry.indexOf("*");
+        // Get a handle for the navigation menu.
+        Menu navigationMenu = navigationView.getMenu();
 
-                        String firstEntry = blockListEntry.substring(0, wildcardIndex);
-                        String secondEntry = blockListEntry.substring(wildcardIndex + 1);
+        // Get handles for the navigation menu items.
+        navigationBackMenuItem = navigationMenu.findItem(R.id.back);
+        navigationForwardMenuItem = navigationMenu.findItem(R.id.forward);
+        navigationHistoryMenuItem = navigationMenu.findItem(R.id.history);
+        navigationRequestsMenuItem = navigationMenu.findItem(R.id.requests);
 
+        // Listen for touches on the navigation menu.
+        navigationView.setNavigationItemSelectedListener(this);
 
-                        String[] doubleEntry = {firstEntry, secondEntry};
+        // Get a handle for the app compat delegate.
+        AppCompatDelegate appCompatDelegate = getDelegate();
 
-                        multiEntryFinalBlockList.add(doubleEntry);
+        // Set the support action bar.
+        appCompatDelegate.setSupportActionBar(toolbar);
 
-                        //Log.i("BlockLists", "Multi entry final block list added: " + firstEntry + " , " + secondEntry).
-                    } else {  // Process a standard final entry.
-                        finalBlockList.add(blockListEntry);
+        // Get a handle for the action bar.
+        actionBar = appCompatDelegate.getSupportActionBar();
 
-                        //Log.i("BlockLists", "Final block list added: " + blockListEntry);
-                    }
-                } else if (blockListEntry.contains("$")) {  // Entries that contain `$` use filter options.
-                    // Strip out any initial `||`.  These will be treated like any other entry.
-                    if (blockListEntry.startsWith("||")) {
-                        blockListEntry = blockListEntry.substring(2);
-                    }
+        // Remove the incorrect lint warning below that the action bar might be null.
+        assert actionBar != null;
 
-                    if (blockListEntry.contains("third-party")) {  // Process third party blocklist entries.
-                        //noinspection StatementWithEmptyBody
-                        if (blockListEntry.contains("~third-party")) {  // Process third-party white list entries.
-                            // Do not process these white list entries.  They are designed to combine with block filters that Privacy Browser doesn't use, like `subdocument` and `xmlhttprequest`.
+        // Add the custom layout, which shows the URL text bar.
+        actionBar.setCustomView(R.layout.url_app_bar);
+        actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
 
-                            // Log.i("BlockLists", "Not added: " + blockListEntry);
-                        } else if (blockListEntry.contains("domain=")) {  // Process third-party domain block list entries.
-                            if (blockListEntry.startsWith("|")) {  // Third-party domain initial block list entries.
+        // Get handles for the views in the URL app bar.
+        urlRelativeLayout = findViewById(R.id.url_relativelayout);
+        urlEditText = findViewById(R.id.url_edittext);
 
-                            } else if (blockListEntry.contains("\\")) {  // Third-party domain regular expressions.
+        // Create the hamburger icon at the start of the AppBar.
+        actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
 
-                            } else {  // Third-party domain entries.
-                                // Parse the entry
-                                String entry = blockListEntry.substring(0, blockListEntry.indexOf("$"));
-                                String filters = blockListEntry.substring(blockListEntry.indexOf("$") + 1);
-                                String domains = filters.substring(filters.indexOf("domain=") + 7);
+        // Initially disable the sliding drawers.  They will be enabled once the blocklists are loaded.
+        drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 
-                                // Strip any trailing "*" on the entries.
-                                if (entry.endsWith("*")) {
-                                    entry = entry.substring(0, entry.length() - 1);
-                                }
+        // Initialize the web view pager adapter.
+        webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
 
-                                if (entry.contains("*")) {  // Third-party domain multi-entry.
+        // Set the pager adapter on the web view pager.
+        webViewPager.setAdapter(webViewPagerAdapter);
 
-                                } else {  // Third-party domain single entry.
+        // Store up to 100 tabs in memory.
+        webViewPager.setOffscreenPageLimit(100);
 
-                                    boolean whiteListDomain = false;
+        // Initialize the app.
+        initializeApp();
 
-                                    // Process each domain.
-                                    do {
-                                        String domain;
+        // Apply the app settings from the shared preferences.
+        applyAppSettings();
 
-                                        if (domains.contains("|")) {
-                                            // Get the first domain
-                                            domain = domains.substring(0, domains.indexOf("|"));
+        // Populate the blocklists.
+        populateBlocklists = new PopulateBlocklists(this, this).execute();
+    }
 
-                                            // Remove the first domain from the list.
-                                            domains = domains.substring(domains.indexOf("|") + 1);
-                                        } else {
-                                            domain = domains;
-                                        }
+    @Override
+    protected void onNewIntent(Intent intent) {
+        // Run the default commands.
+        super.onNewIntent(intent);
 
-                                        // Differentiate between block list domains and white list domains.
-                                        if (domain.startsWith("~")) {  // White list third-party domain entry.
-                                            // Strip the initial `~`.
-                                            domain = domain.substring(1);
+        // Replace the intent that started the app with this one.
+        setIntent(intent);
 
-                                            // Set the white list domain flag and store the domain.
-                                            whiteListDomain = true;
+        // Check to see if the app is being restarted from a saved state.
+        if (savedStateArrayList == null || savedStateArrayList.size() == 0) {  // The activity is not being restarted from a saved state.
+            // Get the information from the intent.
+            String intentAction = intent.getAction();
+            Uri intentUriData = intent.getData();
+            String intentStringExtra = intent.getStringExtra(Intent.EXTRA_TEXT);
 
-                                            // Create the domain entry.
-                                            String[] domainEntry = {domain, entry};
+            // Determine if this is a web search.
+            boolean isWebSearch = ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH));
 
-                                            // Add the entry to the third-party domain white list.
-                                            thirdPartyDomainWhiteList.add(domainEntry);
+            // Only process the URI if it contains data or it is a web search.  If the user pressed the desktop icon after the app was already running the URI will be null.
+            if (intentUriData != null || intentStringExtra != null || isWebSearch) {
+                // Get the shared preferences.
+                SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                                            Log.i("BlockLists", "Third-party domain white list added: " + domain + " , " + entry);
-                                        } else {  // Block list third-party domain entry.
-                                            String[] domainEntry = {domain, entry};
+                // Create a URL string.
+                String url;
 
-                                            thirdPartyDomainBlockList.add(domainEntry);
+                // If the intent action is a web search, perform the search.
+                if (isWebSearch) {  // The intent is a web search.
+                    // Create an encoded URL string.
+                    String encodedUrlString;
 
-                                            // Log.i("BlockLists", "Third-party domain block list added: " + domain + " , " + entry);
-                                        }
-                                    } while (domains.contains("|"));
+                    // Sanitize the search input and convert it to a search.
+                    try {
+                        encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                    } catch (UnsupportedEncodingException exception) {
+                        encodedUrlString = "";
+                    }
 
-                                    // Add a third-party block list entry if a white list domain was processed.
-                                    if (whiteListDomain) {
-                                        // Add an entry to the third-party block list.
-                                        thirdPartyBlockList.add(entry);
+                    // Add the base search URL.
+                    url = searchURL + encodedUrlString;
+                } else if (intentUriData != null) {  // The intent contains a URL formatted as a URI.
+                    // Set the intent data as the URL.
+                    url = intentUriData.toString();
+                } else {  // The intent contains a string, which might be a URL.
+                    // Set the intent string as the URL.
+                    url = intentStringExtra;
+                }
 
-                                        Log.i("BlockLists", "Third-party block list added: " + entry);
-                                    }
-                                }
-                            }
-                        } else if (blockListEntry.startsWith("|")) {  // Third-party initial block list entries.
-                            // Strip the initial `|`.
-                            blockListEntry = blockListEntry.substring(1);
+                // Add a new tab if specified in the preferences.
+                if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {  // Load the URL in a new tab.
+                    // Set the loading new intent flag.
+                    loadingNewIntent = true;
 
-                            // Get the entry.
-                            String entry = blockListEntry.substring(0, blockListEntry.indexOf("$"));
+                    // Add a new tab.
+                    addNewTab(url, true);
+                } else {  // Load the URL in the current tab.
+                    // Make it so.
+                    loadUrl(currentWebView, url);
+                }
 
-                            if (entry.contains("*")) {  // Process a third-party multi-entry initial block list.
-                                int wildcardIndex = entry.indexOf("*");
+                // Close the navigation drawer if it is open.
+                if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
+                    drawerLayout.closeDrawer(GravityCompat.START);
+                }
 
-                                String firstEntry = entry.substring(0, wildcardIndex);
-                                String secondEntry = entry.substring(wildcardIndex + 1);
+                // Close the bookmarks drawer if it is open.
+                if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
+                    drawerLayout.closeDrawer(GravityCompat.END);
+                }
+            }
+        }
+    }
 
-                                String[] thirdPartyDoubleEntry = {firstEntry, secondEntry};
+    @Override
+    public void onRestart() {
+        // Run the default commands.
+        super.onRestart();
 
-                                thirdPartyMultiEntryInitialBlockList.add(thirdPartyDoubleEntry);
+        // Apply the app settings if returning from the Settings activity.
+        if (reapplyAppSettingsOnRestart) {
+            // Reset the reapply app settings on restart tracker.
+            reapplyAppSettingsOnRestart = false;
 
-                                //Log.i("BlockLists", "Third-party multi-entry initial block list added: " + firstEntry + " , " + secondEntry);
-                            } else {
-                                thirdPartyInitialBlockList.add(entry);
+            // Apply the app settings.
+            applyAppSettings();
+        }
 
-                                //Log.i("BlockLists", "Third-party initial block list added: " + entry);
-                            }
-                        } else if (blockListEntry.contains("*")) {  // Process third-party multi-entry or regular expression blocklist entries.
-                            // Get the entry.
-                            String entry = blockListEntry.substring(0, blockListEntry.indexOf("$"));
+        // Apply the domain settings if returning from the settings or domains activity.
+        if (reapplyDomainSettingsOnRestart) {
+            // Reset the reapply domain settings on restart tracker.
+            reapplyDomainSettingsOnRestart = false;
 
-                            if (entry.endsWith("*")) {
-                                // Strip the final `*`.
-                                entry = entry.substring(0, entry.length() - 1);
+            // Reapply the domain settings for each tab.
+            for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                // Get the WebView tab fragment.
+                WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                                // Add the entry to the block list.
-                                thirdPartyBlockList.add(entry);
+                // Get the fragment view.
+                View fragmentView = webViewTabFragment.getView();
 
-                                //Log.i("BlockLists", "Third party block list added: " + entry);
-                            } else if (entry.contains("\\")) {  // Process a third-party regular expression.
-                                // Add the entry to the third-party regular expression block list.
-                                thirdPartyRegularExpressionBlockList.add(entry);
+                // Only reload the WebViews if they exist.
+                if (fragmentView != null) {
+                    // Get the nested scroll WebView from the tab fragment.
+                    NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-                                //Log.i("BlockLists", "Third-party regular expression block list added: " + entry);
-                            } else {  // There are two or more entries.
-                                int wildcardIndex = entry.indexOf("*");
+                    // Reset the current domain name so the domain settings will be reapplied.
+                    nestedScrollWebView.resetCurrentDomainName();
 
-                                String firstEntry = entry.substring(0, wildcardIndex);
-                                String secondEntry = entry.substring(wildcardIndex + 1);
+                    // Reapply the domain settings if the URL is not null, which can happen if an empty tab is active when returning from settings.
+                    if (nestedScrollWebView.getUrl() != null) {
+                        applyDomainSettings(nestedScrollWebView, nestedScrollWebView.getUrl(), false, true, false);
+                    }
+                }
+            }
+        }
 
-                                if (secondEntry.contains("*")) {  // there are three or more entries.
-                                    int secondWildcardIndex = secondEntry.indexOf("*");
+        // Update the bookmarks drawer if returning from the Bookmarks activity.
+        if (restartFromBookmarksActivity) {
+            // Close the bookmarks drawer.
+            drawerLayout.closeDrawer(GravityCompat.END);
 
-                                    String realSecondEntry = secondEntry.substring(0, secondWildcardIndex);
-                                    String thirdEntry = secondEntry.substring(secondWildcardIndex + 1);
+            // Reload the bookmarks drawer.
+            loadBookmarksFolder();
 
-                                    if (thirdEntry.contains("*")) {  // Process a third-party quadruple entry.
-                                        int thirdWildcardIndex = thirdEntry.indexOf("*");
+            // Reset `restartFromBookmarksActivity`.
+            restartFromBookmarksActivity = false;
+        }
 
-                                        String realThirdEntry = thirdEntry.substring(0, thirdWildcardIndex);
-                                        String fourthEntry = thirdEntry.substring(thirdWildcardIndex + 1);
+        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
+        updatePrivacyIcons(true);
+    }
 
-                                        String[] thirdPartyQuadrupleEntry = {firstEntry, realSecondEntry, realThirdEntry, fourthEntry};
+    // `onStart()` runs after `onCreate()` or `onRestart()`.  This is used instead of `onResume()` so the commands aren't called every time the screen is partially hidden.
+    @Override
+    public void onStart() {
+        // Run the default commands.
+        super.onStart();
 
-                                        thirdPartyMultiEntryBlockList.add(thirdPartyQuadrupleEntry);
+        // Resume any WebViews.
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                                        //Log.i("BlockLists", "Third-party multi-entry block list added: " + firstEntry + " , " + realSecondEntry + " , " + realThirdEntry + " , " + fourthEntry);
-                                    } else {  // Process a third-party triple entry.
-                                        String[] thirdPartyTripleEntry = {firstEntry, realSecondEntry, thirdEntry};
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-                                        thirdPartyMultiEntryBlockList.add(thirdPartyTripleEntry);
+            // Only resume the WebViews if they exist (they won't when the app is first created).
+            if (fragmentView != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-                                        //Log.i("BlockLists", "Third-party multi-entry block list added: " + firstEntry + " , " + realSecondEntry + " , " + thirdEntry);
-                                    }
-                                } else {  // Process a third-party double entry.
-                                    String[] thirdPartyDoubleEntry = {firstEntry, secondEntry};
+                // Resume the nested scroll WebView.
+                nestedScrollWebView.onResume();
+            }
+        }
 
-                                    thirdPartyMultiEntryBlockList.add(thirdPartyDoubleEntry);
+        // Resume the nested scroll WebView JavaScript timers.  This is a global command that resumes JavaScript timers on all WebViews.
+        if (currentWebView != null) {
+            currentWebView.resumeTimers();
+        }
 
-                                    //Log.i("BlockLists", "Third-party multi-entry block list added: " + firstEntry + " , " + secondEntry);
-                                }
-                            }
-                        } else {  // Process standard third party entries.
-                            // Get the entry.
-                            String entry = blockListEntry.substring(0, blockListEntry.indexOf("$"));
+        // Reapply the proxy settings if the system is using a proxy.  This redisplays the appropriate alert dialog.
+        if (!proxyMode.equals(ProxyHelper.NONE)) {
+            applyProxy(false);
+        }
 
-                            // Add the entry to the block list.
-                            thirdPartyBlockList.add(entry);
+        // Reapply any system UI flags and the ad in the free flavor.
+        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {  // The system is displaying a website or a video in full screen mode.
+            /* Hide the system bars.
+             * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+             * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+             */
+            rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                    View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+        } else if (BuildConfig.FLAVOR.contentEquals("free")) {  // The system in not in full screen mode.
+            // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+            View adView = findViewById(R.id.adview);
+
+            // Resume the ad.
+            AdHelper.resumeAd(adView);
+        }
+    }
 
-                            //Log.i("BlockLists", "Third party block list added: " + entry);
-                        }
-                    } else if (blockListEntry.substring(blockListEntry.indexOf("$")).contains("domain")) {
-                        if (blockListEntry.contains("~")) {  // Whitelist.
-                            // Separate the filters.
-                            String entry = blockListEntry.substring(0, blockListEntry.indexOf("$"));
-                            String filters = blockListEntry.substring(blockListEntry.indexOf("$") + 1);
-                            String domains = filters.substring(filters.indexOf("domain=") + 7);
-
-                            // Strip any final `*` from the entry.  They are redundant.
-                            if (entry.endsWith("*")) {
-                                entry = entry.substring(0, entry.length() - 1);
-                            }
+    // `onStop()` runs after `onPause()`.  It is used instead of `onPause()` so the commands are not called every time the screen is partially hidden.
+    @Override
+    public void onStop() {
+        // Run the default commands.
+        super.onStop();
 
-                            // Process each domain.
-                            do {
-                                String domain;
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                                if (domains.contains("|")) {
-                                    // Get the first domain
-                                    domain = domains.substring(0, domains.indexOf("|"));
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-                                    // Remove the first domain from the list.
-                                    domains = domains.substring(domains.indexOf("|") + 1);
-                                } else {
-                                    domain = domains;
-                                }
+            // Only pause the WebViews if they exist (they won't when the app is first created).
+            if (fragmentView != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-                                // Strip the initial `~`.
-                                domain = domain.substring(1);
+                // Pause the nested scroll WebView.
+                nestedScrollWebView.onPause();
+            }
+        }
 
-                                if (entry.contains("*")) {  // Process a double entry.
-                                    int wildcardIndex = entry.indexOf("*");
+        // Pause the WebView JavaScript timers.  This is a global command that pauses JavaScript on all WebViews.
+        if (currentWebView != null) {
+            currentWebView.pauseTimers();
+        }
 
-                                    String firstEntry = entry.substring(0, wildcardIndex);
-                                    String secondEntry = entry.substring(wildcardIndex + 1);
+        // Pause the ad or it will continue to consume resources in the background on the free flavor.
+        if (BuildConfig.FLAVOR.contentEquals("free")) {
+            // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+            View adView = findViewById(R.id.adview);
 
-                                    String[] domainDoubleEntry = {firstEntry, secondEntry};
+            // Pause the ad.
+            AdHelper.pauseAd(adView);
+        }
+    }
 
-                                    domainWhiteList.add(domainDoubleEntry);
+    @Override
+    public void onSaveInstanceState(@NonNull Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onSaveInstanceState(savedInstanceState);
 
-                                    //Log.i("BlockLists", "Domain white list added: " + domain + " , " + firstEntry + " , " + secondEntry);
-                                } else {  // Process a single entry.
-                                    String[] domainEntry = {domain, entry};
+        // Create the saved state array lists.
+        ArrayList<Bundle> savedStateArrayList = new ArrayList<>();
+        ArrayList<Bundle> savedNestedScrollWebViewStateArrayList = new ArrayList<>();
 
-                                    domainWhiteList.add(domainEntry);
+        // Get the URLs from each tab.
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                                    //Log.i("BlockLists", "Domain white list added: " + domain + " , " + entry);
-                                }
-                            } while (domains.contains("|"));
-                        } else {  // The block list entry contains a domain, but not a third party designation and isn't a whitelist.
-                            // Separate the filters.
-                            String entry = blockListEntry.substring(0, blockListEntry.indexOf("$"));
-                            String filters = blockListEntry.substring(blockListEntry.indexOf("$") + 1);
-                            String domains = filters.substring(filters.indexOf("domain=") + 7);
-
-                            // Only process the block list item if the entry is not null.  Some lines in EasyList begin with `$websocket`, which create a null entry.
-                            if (!entry.equals("")) {
-                                do {
-                                    String domain;
-
-                                    if (domains.contains("|")) {
-                                        // Get the first domain.
-                                        domain = domains.substring(0, domains.indexOf("|"));
-
-                                        // Remove the first domain from the list.
-                                        domains = domains.substring(domains.indexOf("|") + 1);
-                                    } else {
-                                        domain = domains;
-                                    }
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-                                    if (entry.contains("*")) {
-                                        int wildcardIndex = entry.indexOf("*");
+            if (fragmentView != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-                                        String firstEntry = entry.substring(0, wildcardIndex);
-                                        String secondEntry = entry.substring(wildcardIndex + 1);
+                // Create saved state bundle.
+                Bundle savedStateBundle = new Bundle();
 
-                                        String[] domainDoubleEntry = {domain, firstEntry, secondEntry};
+                // Get the current states.
+                nestedScrollWebView.saveState(savedStateBundle);
+                Bundle savedNestedScrollWebViewStateBundle = nestedScrollWebView.saveNestedScrollWebViewState();
 
-                                        domainBlockList.add(domainDoubleEntry);
+                // Store the saved states in the array lists.
+                savedStateArrayList.add(savedStateBundle);
+                savedNestedScrollWebViewStateArrayList.add(savedNestedScrollWebViewStateBundle);
+            }
+        }
 
-                                        //Log.i("BlockLists", "Domain double entry block list added: " + domain + " , " + firstEntry + " , " + secondEntry);
-                                    } else if (entry.startsWith("|")) {
-                                        // Remove the initial `|`;
-                                        String entryBase = entry.substring(1);
+        // Get the current tab position.
+        int currentTabPosition = tabLayout.getSelectedTabPosition();
 
-                                        //noinspection StatementWithEmptyBody
-                                        if (entryBase.equals("http://") || entryBase.equals("https://")) {
-                                            // Do nothing.  These entries will entirely block the website.
-                                            // Often the original entry blocks `$script` but Privacy Browser does not currently differentiate between scripts and other entries.
-                                        } else {
-                                            String[] domainEntry = {domain, entryBase};
+        // Store the saved states in the bundle.
+        savedInstanceState.putParcelableArrayList(SAVED_STATE_ARRAY_LIST, savedStateArrayList);
+        savedInstanceState.putParcelableArrayList(SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST, savedNestedScrollWebViewStateArrayList);
+        savedInstanceState.putInt(SAVED_TAB_POSITION, currentTabPosition);
+        savedInstanceState.putString(PROXY_MODE, proxyMode);
+    }
 
-                                            domainInitialBlockList.add(domainEntry);
+    @Override
+    public void onDestroy() {
+        // Unregister the orbot status broadcast receiver if it exists.
+        if (orbotStatusBroadcastReceiver != null) {
+            this.unregisterReceiver(orbotStatusBroadcastReceiver);
+        }
 
-                                            //Log.i("BlockLists", "Domain initial block list added: " + domain + " , " + entryBase);
-                                        }
-                                    } else if (entry.endsWith("|")) {
-                                        // Remove the final `|`.
-                                        String entryBase = entry.substring(0, entry.length() - 1);
+        // Close the bookmarks cursor if it exists.
+        if (bookmarksCursor != null) {
+            bookmarksCursor.close();
+        }
 
-                                        String[] domainEntry = {domain, entryBase};
+        // Close the bookmarks database if it exists.
+        if (bookmarksDatabaseHelper != null) {
+            bookmarksDatabaseHelper.close();
+        }
 
-                                        domainFinalBlockList.add(domainEntry);
+        // Stop populating the blocklists if the AsyncTask is running in the background.
+        if (populateBlocklists != null) {
+            populateBlocklists.cancel(true);
+        }
 
-                                        //Log.i("BlockLists", "Domain final block list added: " + domain + " , " + entryBase);
-                                    } else if (entry.contains("\\")) {
-                                        String[] domainEntry = {domain, entry};
+        // Run the default commands.
+        super.onDestroy();
+    }
 
-                                        domainRegularExpressionBlockList.add(domainEntry);
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        // Inflate the menu.  This adds items to the action bar if it is present.
+        getMenuInflater().inflate(R.menu.webview_options_menu, menu);
 
-                                        // Log.i("BlockLists", "Domain regular expression block list added: " + domain + " , " + entry);
-                                    } else {
-                                        String[] domainEntry = {domain, entry};
+        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
+        optionsMenu = menu;
+
+        // Get handles for the class menu items.
+        optionsPrivacyMenuItem = menu.findItem(R.id.javascript);
+        optionsRefreshMenuItem = menu.findItem(R.id.refresh);
+        optionsFirstPartyCookiesMenuItem = menu.findItem(R.id.first_party_cookies);
+        optionsThirdPartyCookiesMenuItem = menu.findItem(R.id.third_party_cookies);
+        optionsDomStorageMenuItem = menu.findItem(R.id.dom_storage);
+        optionsSaveFormDataMenuItem = menu.findItem(R.id.save_form_data);  // Form data can be removed once the minimum API >= 26.
+        optionsClearDataMenuItem = menu.findItem(R.id.clear_data);
+        optionsClearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
+        optionsClearDomStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
+        optionsClearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
+        optionsBlocklistsMenuItem = menu.findItem(R.id.blocklists);
+        optionsEasyListMenuItem = menu.findItem(R.id.easylist);
+        optionsEasyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
+        optionsFanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
+        optionsFanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
+        optionsUltraListMenuItem = menu.findItem(R.id.ultralist);
+        optionsUltraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
+        optionsBlockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
+        optionsProxyMenuItem = menu.findItem(R.id.proxy);
+        optionsProxyNoneMenuItem = menu.findItem(R.id.proxy_none);
+        optionsProxyTorMenuItem = menu.findItem(R.id.proxy_tor);
+        optionsProxyI2pMenuItem = menu.findItem(R.id.proxy_i2p);
+        optionsProxyCustomMenuItem = menu.findItem(R.id.proxy_custom);
+        optionsUserAgentMenuItem = menu.findItem(R.id.user_agent);
+        optionsUserAgentPrivacyBrowserMenuItem = menu.findItem(R.id.user_agent_privacy_browser);
+        optionsUserAgentWebViewDefaultMenuItem = menu.findItem(R.id.user_agent_webview_default);
+        optionsUserAgentFirefoxOnAndroidMenuItem = menu.findItem(R.id.user_agent_firefox_on_android);
+        optionsUserAgentChromeOnAndroidMenuItem = menu.findItem(R.id.user_agent_chrome_on_android);
+        optionsUserAgentSafariOnIosMenuItem = menu.findItem(R.id.user_agent_safari_on_ios);
+        optionsUserAgentFirefoxOnLinuxMenuItem = menu.findItem(R.id.user_agent_firefox_on_linux);
+        optionsUserAgentChromiumOnLinuxMenuItem = menu.findItem(R.id.user_agent_chromium_on_linux);
+        optionsUserAgentFirefoxOnWindowsMenuItem = menu.findItem(R.id.user_agent_firefox_on_windows);
+        optionsUserAgentChromeOnWindowsMenuItem = menu.findItem(R.id.user_agent_chrome_on_windows);
+        optionsUserAgentEdgeOnWindowsMenuItem = menu.findItem(R.id.user_agent_edge_on_windows);
+        optionsUserAgentInternetExplorerOnWindowsMenuItem = menu.findItem(R.id.user_agent_internet_explorer_on_windows);
+        optionsUserAgentSafariOnMacosMenuItem = menu.findItem(R.id.user_agent_safari_on_macos);
+        optionsUserAgentCustomMenuItem = menu.findItem(R.id.user_agent_custom);
+        optionsSwipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
+        optionsWideViewportMenuItem = menu.findItem(R.id.wide_viewport);
+        optionsDisplayImagesMenuItem = menu.findItem(R.id.display_images);
+        optionsDarkWebViewMenuItem = menu.findItem(R.id.dark_webview);
+        optionsFontSizeMenuItem = menu.findItem(R.id.font_size);
+        optionsAddOrEditDomainMenuItem = menu.findItem(R.id.add_or_edit_domain);
+
+        // Get handles for the method menu items.
+        MenuItem bookmarksMenuItem = menu.findItem(R.id.bookmarks);
+        MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
 
-                                        domainBlockList.add(domainEntry);
+        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
+        updatePrivacyIcons(false);
 
-                                        //Log.i("BlockLists", "Domain block list added: " + domain + " , " + entry);
-                                    }
-                                } while (domains.contains("|"));
-                            }
-                        }
-                    } else if (blockListEntry.contains("~")) {  // Whitelist entries.
-                        // Remove the filter options.
-                        blockListEntry = blockListEntry.substring(0, blockListEntry.indexOf("$"));
+        // Only display third-party cookies if API >= 21
+        optionsThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 
-                        // Strip any trailing `*`.
-                        if (blockListEntry.endsWith("*")) {
-                            blockListEntry = blockListEntry.substring(0, blockListEntry.length() -1);
-                        }
+        // Only display the form data menu items if the API < 26.
+        optionsSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
+        optionsClearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
 
-                        if (blockListEntry.contains("*")) {
-                            int wildcardIndex = blockListEntry.indexOf("*");
+        // Disable the clear form data menu item if the API >= 26 so that the status of the main Clear Data is calculated correctly.
+        optionsClearFormDataMenuItem.setEnabled(Build.VERSION.SDK_INT < 26);
 
-                            String firstEntry = blockListEntry.substring(0, wildcardIndex);
-                            String secondEntry = blockListEntry.substring(wildcardIndex + 1);
+        // Only display the dark WebView menu item if API >= 21.
+        optionsDarkWebViewMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 
+        // Only show Ad Consent if this is the free flavor.
+        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
 
-                            String[] doubleEntry = {firstEntry, secondEntry};
+        // Get the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                            multiEntryWhiteList.add(doubleEntry);
+        // Get the dark theme and app bar preferences.
+        boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean(getString(R.string.display_additional_app_bar_icons_key), false);
 
-                            //Log.i("BlockLists", "Multi entry white list added: " + firstEntry + " , " + secondEntry);
-                        } else {
-                            mainWhiteList.add(blockListEntry);
+        // Set the status of the additional app bar icons.  Setting the refresh menu item to `SHOW_AS_ACTION_ALWAYS` makes it appear even on small devices like phones.
+        if (displayAdditionalAppBarIcons) {
+            optionsRefreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
+            bookmarksMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+            optionsFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+        } else { //Do not display the additional icons.
+            optionsRefreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+            bookmarksMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+            optionsFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+        }
 
-                            // Log.i("BlockLists", "Main white list added: " + blockListEntry);
-                        }
-                    } else if (blockListEntry.contains("\\")) {  // Regular expressions.
-                        // Remove the filter options.
-                        blockListEntry = blockListEntry.substring(0, blockListEntry.indexOf("$"));
+        // Replace Refresh with Stop if a URL is already loading.
+        if (currentWebView != null && currentWebView.getProgress() != 100) {
+            // Set the title.
+            optionsRefreshMenuItem.setTitle(R.string.stop);
 
-                        regularExpressionBlockList.add(blockListEntry);
+            // Set the icon if it is displayed in the app bar.
+            if (displayAdditionalAppBarIcons) {
+                // Get the current theme status.
+                int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 
-                        //Log.i("BlockLists", "Regular expression list added: " + blockListEntry);
-                    } else {
-                        // Remove the filter options.
-                        blockListEntry = blockListEntry.substring(0, blockListEntry.indexOf("$"));
+                // Set the icon according to the current theme status.
+                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+                    optionsRefreshMenuItem.setIcon(R.drawable.close_blue_day);
+                } else {
+                    optionsRefreshMenuItem.setIcon(R.drawable.close_blue_night);
+                }
+            }
+        }
 
-                        // Strip any trailing `*`.  These are redundant.
-                        if (blockListEntry.endsWith("*")) {
-                            blockListEntry = blockListEntry.substring(0, blockListEntry.length() - 1);
-                        }
+        // Done.
+        return true;
+    }
 
-                        if (blockListEntry.contains("*")) {  // Use a multi entry list.
-                            int wildcardIndex = blockListEntry.indexOf("*");
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        // Get a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
+
+        // Initialize the current user agent string and the font size.
+        String currentUserAgent = getString(R.string.user_agent_privacy_browser);
+        int fontSize = 100;
+
+        // Set items that require the current web view to be populated.  It will be null when the program is first opened, as `onPrepareOptionsMenu()` is called before the first WebView is initialized.
+        if (currentWebView != null) {
+            // Set the add or edit domain text.
+            if (currentWebView.getDomainSettingsApplied()) {
+                optionsAddOrEditDomainMenuItem.setTitle(R.string.edit_domain_settings);
+            } else {
+                optionsAddOrEditDomainMenuItem.setTitle(R.string.add_domain_settings);
+            }
 
-                            String firstEntry = blockListEntry.substring(0, wildcardIndex);
-                            String secondEntry = blockListEntry.substring(wildcardIndex + 1);
+            // Get the current user agent from the WebView.
+            currentUserAgent = currentWebView.getSettings().getUserAgentString();
+
+            // Get the current font size from the
+            fontSize = currentWebView.getSettings().getTextZoom();
+
+            // Set the status of the menu item checkboxes.
+            optionsDomStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
+            optionsSaveFormDataMenuItem.setChecked(currentWebView.getSettings().getSaveFormData());  // Form data can be removed once the minimum API >= 26.
+            optionsEasyListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
+            optionsEasyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
+            optionsFanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+            optionsFanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+            optionsUltraListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
+            optionsUltraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
+            optionsBlockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+            optionsSwipeToRefreshMenuItem.setChecked(currentWebView.getSwipeToRefresh());
+            optionsWideViewportMenuItem.setChecked(currentWebView.getSettings().getUseWideViewPort());
+            optionsDisplayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
+
+            // Initialize the display names for the blocklists with the number of blocked requests.
+            optionsBlocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+            optionsEasyListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYLIST) + " - " + getString(R.string.easylist));
+            optionsEasyPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYPRIVACY) + " - " + getString(R.string.easyprivacy));
+            optionsFanboysAnnoyanceListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " + getString(R.string.fanboys_annoyance_list));
+            optionsFanboysSocialBlockingListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " + getString(R.string.fanboys_social_blocking_list));
+            optionsUltraListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRALIST) + " - " + getString(R.string.ultralist));
+            optionsUltraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRAPRIVACY) + " - " + getString(R.string.ultraprivacy));
+            optionsBlockAllThirdPartyRequestsMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " + getString(R.string.block_all_third_party_requests));
+
+            // Only modify third-party cookies if the API >= 21.
+            if (Build.VERSION.SDK_INT >= 21) {
+                // Set the status of the third-party cookies checkbox.
+                optionsThirdPartyCookiesMenuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
+
+                // Enable third-party cookies if first-party cookies are enabled.
+                optionsThirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
+            }
 
-                            // Remove `.*` if it appears at the beginning of the second entry.
-                            if (secondEntry.startsWith(".*")) {
-                                secondEntry = secondEntry.substring(2);
-                            }
+            // Enable DOM Storage if JavaScript is enabled.
+            optionsDomStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
 
-                            // Create a third entry if required.
-                            if (secondEntry.contains("*")) {
-                                wildcardIndex = secondEntry.indexOf("*");
+            // Set the checkbox status for dark WebView if the WebView supports it.
+            if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
+                optionsDarkWebViewMenuItem.setChecked(WebSettingsCompat.getForceDark(currentWebView.getSettings()) == WebSettingsCompat.FORCE_DARK_ON);
+            }
+        }
 
-                                String thirdEntry = secondEntry.substring(wildcardIndex + 1);
-                                secondEntry = secondEntry.substring(0, wildcardIndex);
+        // Set the checked status of the first party cookies menu item.
+        optionsFirstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
 
+        // Enable Clear Cookies if there are any.
+        optionsClearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
 
-                                if (thirdEntry.endsWith("|")) {
-                                    thirdEntry = thirdEntry.substring(0, thirdEntry.length() - 1);
+        // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
+        String privateDataDirectoryString = getApplicationInfo().dataDir;
 
-                                    String[] tripleEntry = {firstEntry, secondEntry, thirdEntry};
+        // Get a count of the number of files in the Local Storage directory.
+        File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
+        int localStorageDirectoryNumberOfFiles = 0;
+        if (localStorageDirectory.exists()) {
+            // `Objects.requireNonNull` removes a lint warning that `localStorageDirectory.list` might produce a null pointed exception if it is dereferenced.
+            localStorageDirectoryNumberOfFiles = Objects.requireNonNull(localStorageDirectory.list()).length;
+        }
 
-                                    multiEntryFinalBlockList.add(tripleEntry);
+        // Get a count of the number of files in the IndexedDB directory.
+        File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
+        int indexedDBDirectoryNumberOfFiles = 0;
+        if (indexedDBDirectory.exists()) {
+            // `Objects.requireNonNull` removes a lint warning that `indexedDBDirectory.list` might produce a null pointed exception if it is dereferenced.
+            indexedDBDirectoryNumberOfFiles = Objects.requireNonNull(indexedDBDirectory.list()).length;
+        }
 
-                                    //Log.i("BlockLists", "Multi entry final tripple block list added: " + firstEntry + " , " + secondEntry + " , " + thirdEntry);
-                                } else {
-                                    String[] tripleEntry = {firstEntry, secondEntry, thirdEntry};
+        // Enable Clear DOM Storage if there is any.
+        optionsClearDomStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
 
-                                    multiEntryBlockList.add(tripleEntry);
+        // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
+        if (Build.VERSION.SDK_INT < 26) {
+            // Get the WebView database.
+            WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
 
-                                    // Log.i("BlockLists", "Multi entry tripple block list added: " + firstEntry + " , " + secondEntry + " , " + thirdEntry);
-                                }
-                            } else {  // This is a double entry.
-                                if (firstEntry.startsWith("|")) {
-                                    String[] doubleEntry = {firstEntry.substring(1), secondEntry};
+            // Enable the clear form data menu item if there is anything to clear.
+            optionsClearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
+        }
 
-                                    multiEntryInitialBlockList.add(doubleEntry);
+        // Enable Clear Data if any of the submenu items are enabled.
+        optionsClearDataMenuItem.setEnabled(optionsClearCookiesMenuItem.isEnabled() || optionsClearDomStorageMenuItem.isEnabled() || optionsClearFormDataMenuItem.isEnabled());
 
-                                    //Log.i("BlockLists", "Multi entry initial block list added: " + firstEntry.substring(1) + " , " + secondEntry);
-                                } else {
-                                    String[] doubleEntry = {firstEntry, secondEntry};
+        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
+        optionsFanboysSocialBlockingListMenuItem.setEnabled(!optionsFanboysAnnoyanceListMenuItem.isChecked());
 
-                                    multiEntryBlockList.add(doubleEntry);
+        // Set the proxy title and check the applied proxy.
+        switch (proxyMode) {
+            case ProxyHelper.NONE:
+                // Set the proxy title.
+                optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_none));
 
-                                    //Log.i("BlockLists", "Multi entry block list added: " + firstEntry + " , " + secondEntry);
-                                }
-                            }
-                        } else if (blockListEntry.startsWith("|")) {  // Populate the initial block list.
-                            // Strip the initial `|`.
-                            blockListEntry = blockListEntry.substring(1);
+                // Check the proxy None radio button.
+                optionsProxyNoneMenuItem.setChecked(true);
+                break;
 
-                            // Populate the initial block list.
-                            initialBlockList.add(blockListEntry);
+            case ProxyHelper.TOR:
+                // Set the proxy title.
+                optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_tor));
 
-                            //Log.i("BlockLists", "Initial block list added: " + blockListEntry);
-                        } else {  // Populate the main block list.
-                            mainBlockList.add(blockListEntry);
+                // Check the proxy Tor radio button.
+                optionsProxyTorMenuItem.setChecked(true);
+                break;
 
-                            //Log.i("BlockLists", "Main block list added: " + blockListEntry);
-                        }
-                    }
-                } else {  // Populate the standard lists.
-                    // Strip out any initial `||`.  These will be treated like any other entry.
-                    if (blockListEntry.startsWith("||")) {
-                        blockListEntry = blockListEntry.substring(2);
-                    }
+            case ProxyHelper.I2P:
+                // Set the proxy title.
+                optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_i2p));
 
-                    // Strip out any initial `*`.
-                    if (blockListEntry.startsWith("*")) {
-                        blockListEntry = blockListEntry.substring(1);
-                    }
+                // Check the proxy I2P radio button.
+                optionsProxyI2pMenuItem.setChecked(true);
+                break;
 
-                    // Strip out any trailing `*`.
-                    if (blockListEntry.endsWith("*")) {
-                        blockListEntry = blockListEntry.substring(0, blockListEntry.length() - 1);
-                    }
+            case ProxyHelper.CUSTOM:
+                // Set the proxy title.
+                optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_custom));
 
-                    if (blockListEntry.contains("*")) {  // Entries that contain a `*` in the middle have to be treated specially.
-                        int wildcardIndex = blockListEntry.indexOf("*");
+                // Check the proxy Custom radio button.
+                optionsProxyCustomMenuItem.setChecked(true);
+                break;
+        }
 
-                        String firstEntry = blockListEntry.substring(0, wildcardIndex);
-                        String secondEntry = blockListEntry.substring(wildcardIndex + 1);
+        // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
+        if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_privacy_browser));
+
+            // Select the Privacy Browser radio box.
+            optionsUserAgentPrivacyBrowserMenuItem.setChecked(true);
+        } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_webview_default));
+
+            // Select the WebView Default radio box.
+            optionsUserAgentWebViewDefaultMenuItem.setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_android));
+
+            // Select the Firefox on Android radio box.
+            optionsUserAgentFirefoxOnAndroidMenuItem.setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chrome_on_android));
+
+            // Select the Chrome on Android radio box.
+            optionsUserAgentChromeOnAndroidMenuItem.setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_safari_on_ios));
+
+            // Select the Safari on iOS radio box.
+            optionsUserAgentSafariOnIosMenuItem.setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_linux));
+
+            // Select the Firefox on Linux radio box.
+            optionsUserAgentFirefoxOnLinuxMenuItem.setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chromium_on_linux));
+
+            // Select the Chromium on Linux radio box.
+            optionsUserAgentChromiumOnLinuxMenuItem.setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_windows));
+
+            // Select the Firefox on Windows radio box.
+            optionsUserAgentFirefoxOnWindowsMenuItem.setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chrome_on_windows));
+
+            // Select the Chrome on Windows radio box.
+            optionsUserAgentChromeOnWindowsMenuItem.setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_edge_on_windows));
+
+            // Select the Edge on Windows radio box.
+            optionsUserAgentEdgeOnWindowsMenuItem.setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_internet_explorer_on_windows));
+
+            // Select the Internet on Windows radio box.
+            optionsUserAgentInternetExplorerOnWindowsMenuItem.setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_safari_on_macos));
+
+            // Select the Safari on macOS radio box.
+            optionsUserAgentSafariOnMacosMenuItem.setChecked(true);
+        } else {  // Custom user agent.
+            // Update the user agent menu item title.
+            optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_custom));
+
+            // Select the Custom radio box.
+            optionsUserAgentCustomMenuItem.setChecked(true);
+        }
 
-                        // Remove `.*` if it appears at the beginning of the second entry.
-                        if (secondEntry.startsWith(".*")) {
-                            secondEntry = secondEntry.substring(2);
-                        }
+        // Set the font size title.
+        optionsFontSizeMenuItem.setTitle(getString(R.string.font_size) + " - " + fontSize + "%");
 
-                        // Create a third entry if required.
-                        if (secondEntry.contains("*")) {
-                            wildcardIndex = secondEntry.indexOf("*");
+        // Run all the other default commands.
+        super.onPrepareOptionsMenu(menu);
 
-                            String thirdEntry = secondEntry.substring(wildcardIndex + 1);
-                            secondEntry = secondEntry.substring(0, wildcardIndex);
+        // Display the menu.
+        return true;
+    }
 
-                            String[] tripleEntry = {firstEntry, secondEntry, thirdEntry};
+    @Override
+    public boolean onOptionsItemSelected(MenuItem menuItem) {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                            multiEntryBlockList.add(tripleEntry);
+        // Get a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
 
-                            //Log.i("BlockLists", "Multi entry tripple block list added: " + firstEntry + " , " + secondEntry + " , " + thirdEntry);
-                        } else {
-                            if (firstEntry.startsWith("|")) {
-                                String[] doubleEntry = {firstEntry.substring(1), secondEntry};
+        // Get the selected menu item ID.
+        int menuItemId = menuItem.getItemId();
 
-                                multiEntryInitialBlockList.add(doubleEntry);
+        // Run the commands that correlate to the selected menu item.
+        if (menuItemId == R.id.javascript) {  // JavaScript.
+            // Toggle the JavaScript status.
+            currentWebView.getSettings().setJavaScriptEnabled(!currentWebView.getSettings().getJavaScriptEnabled());
+
+            // Update the privacy icon.
+            updatePrivacyIcons(true);
+
+            // Display a `Snackbar`.
+            if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
+                Snackbar.make(webViewPager, R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
+            } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
+                Snackbar.make(webViewPager, R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
+            } else {  // Privacy mode.
+                Snackbar.make(webViewPager, R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
+            }
 
-                                //Log.i("BlockLists", "Multi entry initial block list added: " + firstEntry.substring(1) + " , " + secondEntry);
-                            } else {
-                                String[] doubleEntry = {firstEntry, secondEntry};
+            // Reload the current WebView.
+            currentWebView.reload();
 
-                                multiEntryBlockList.add(doubleEntry);
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.refresh) {  // Refresh.
+            // Run the command that correlates to the current status of the menu item.
+            if (menuItem.getTitle().equals(getString(R.string.refresh))) {  // The refresh button was pushed.
+                // Reload the current WebView.
+                currentWebView.reload();
+            } else {  // The stop button was pushed.
+                // Stop the loading of the WebView.
+                currentWebView.stopLoading();
+            }
 
-                                //Log.i("BlockLists", "Multi entry block list added: " + firstEntry + " , " + secondEntry);
-                            }
-                        }
-                    } else {  // This is a basic entry.
-                        // Add the modified block list entry to the main block list.
-                        mainBlockList.add(blockListEntry);
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.bookmarks) {  // Bookmarks.
+            // Open the bookmarks drawer.
+            drawerLayout.openDrawer(GravityCompat.END);
 
-                        //Log.i("BlockLists", "Main block list added: " + blockListEntry);
-                    }
-                }
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.first_party_cookies) {  // First-party cookies.
+            // Switch the first-party cookie status.
+            cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
+
+            // Store the first-party cookie status.
+            currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
+
+            // Update the menu checkbox.
+            menuItem.setChecked(cookieManager.acceptCookie());
+
+            // Update the privacy icon.
+            updatePrivacyIcons(true);
+
+            // Display a snackbar.
+            if (cookieManager.acceptCookie()) {  // First-party cookies are enabled.
+                Snackbar.make(webViewPager, R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
+            } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is still enabled.
+                Snackbar.make(webViewPager, R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
+            } else {  // Privacy mode.
+                Snackbar.make(webViewPager, R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
             }
 
-            // Close `bufferedReader`.
-            bufferedReader.close();
-        } catch (IOException e) {
-            // The asset exists, so the `IOException` will never be thrown.
-        }
+            // Reload the current WebView.
+            currentWebView.reload();
 
-        Log.i("BlockLists", "Finish populating block lists");
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.third_party_cookies) {  // Third-party cookies.
+            // Only act if the API >= 21.  Otherwise, there are no third-party cookie controls.
+            if (Build.VERSION.SDK_INT >= 21) {
+                // Toggle the status of thirdPartyCookiesEnabled.
+                cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
 
-        // Set the content view.
-        setContentView(R.layout.main_drawerlayout);
+                // Update the menu checkbox.
+                menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
 
-        // Get a handle for `inputMethodManager`.
-        inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+                // Display a snackbar.
+                if (cookieManager.acceptThirdPartyCookies(currentWebView)) {
+                    Snackbar.make(webViewPager, R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
+                } else {
+                    Snackbar.make(webViewPager, R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
+                }
 
-        // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
-        supportAppBar = findViewById(R.id.app_bar);
-        setSupportActionBar(supportAppBar);
-        appBar = getSupportActionBar();
+                // Reload the current WebView.
+                currentWebView.reload();
+            }
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.dom_storage) {  // DOM storage.
+            // Toggle the status of domStorageEnabled.
+            currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
+
+            // Update the menu checkbox.
+            menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
+
+            // Update the privacy icon.
+            updatePrivacyIcons(true);
+
+            // Display a snackbar.
+            if (currentWebView.getSettings().getDomStorageEnabled()) {
+                Snackbar.make(webViewPager, R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
+            } else {
+                Snackbar.make(webViewPager, R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
+            }
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.save_form_data) {  // Form data.  This can be removed once the minimum API >= 26.
+            // Switch the status of saveFormDataEnabled.
+            currentWebView.getSettings().setSaveFormData(!currentWebView.getSettings().getSaveFormData());
+
+            // Update the menu checkbox.
+            menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
+
+            // Display a snackbar.
+            if (currentWebView.getSettings().getSaveFormData()) {
+                Snackbar.make(webViewPager, R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
+            } else {
+                Snackbar.make(webViewPager, R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
+            }
+
+            // Update the privacy icon.
+            updatePrivacyIcons(true);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.clear_cookies) {  // Clear cookies.
+            // Create a snackbar.
+            Snackbar.make(webViewPager, R.string.cookies_deleted, Snackbar.LENGTH_LONG)
+                    .setAction(R.string.undo, v -> {
+                        // Do nothing because everything will be handled by `onDismissed()` below.
+                    })
+                    .addCallback(new Snackbar.Callback() {
+                        @Override
+                        public void onDismissed(Snackbar snackbar, int event) {
+                            if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
+                                // Delete the cookies, which command varies by SDK.
+                                if (Build.VERSION.SDK_INT < 21) {
+                                    cookieManager.removeAllCookie();
+                                } else {
+                                    cookieManager.removeAllCookies(null);
+                                }
+                            }
+                        }
+                    })
+                    .show();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.clear_dom_storage) {  // Clear DOM storage.
+            // Create a snackbar.
+            Snackbar.make(webViewPager, R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
+                    .setAction(R.string.undo, v -> {
+                        // Do nothing because everything will be handled by `onDismissed()` below.
+                    })
+                    .addCallback(new Snackbar.Callback() {
+                        @Override
+                        public void onDismissed(Snackbar snackbar, int event) {
+                            if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
+                                // Delete the DOM Storage.
+                                WebStorage webStorage = WebStorage.getInstance();
+                                webStorage.deleteAllData();
+
+                                // Initialize a handler to manually delete the DOM storage files and directories.
+                                Handler deleteDomStorageHandler = new Handler();
+
+                                // Setup a runnable to manually delete the DOM storage files and directories.
+                                Runnable deleteDomStorageRunnable = () -> {
+                                    try {
+                                        // Get a handle for the runtime.
+                                        Runtime runtime = Runtime.getRuntime();
+
+                                        // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
+                                        // which links to `/data/data/com.stoutner.privacybrowser.standard`.
+                                        String privateDataDirectoryString = getApplicationInfo().dataDir;
+
+                                        // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                                        Process deleteLocalStorageProcess = runtime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
+
+                                        // Multiple commands must be used because `Runtime.exec()` does not like `*`.
+                                        Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
+                                        Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
+                                        Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
+                                        Process deleteDatabasesProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
+
+                                        // Wait for the processes to finish.
+                                        deleteLocalStorageProcess.waitFor();
+                                        deleteIndexProcess.waitFor();
+                                        deleteQuotaManagerProcess.waitFor();
+                                        deleteQuotaManagerJournalProcess.waitFor();
+                                        deleteDatabasesProcess.waitFor();
+                                    } catch (Exception exception) {
+                                        // Do nothing if an error is thrown.
+                                    }
+                                };
+
+                                // Manually delete the DOM storage files after 200 milliseconds.
+                                deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
+                            }
+                        }
+                    })
+                    .show();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.clear_form_data) {  // Clear form data.  This can be remove once the minimum API >= 26.
+            // Create a snackbar.
+            Snackbar.make(webViewPager, R.string.form_data_deleted, Snackbar.LENGTH_LONG)
+                    .setAction(R.string.undo, v -> {
+                        // Do nothing because everything will be handled by `onDismissed()` below.
+                    })
+                    .addCallback(new Snackbar.Callback() {
+                        @Override
+                        public void onDismissed(Snackbar snackbar, int event) {
+                            if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
+                                // Get a handle for the webView database.
+                                WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
+
+                                // Delete the form data.
+                                webViewDatabase.clearFormData();
+                            }
+                        }
+                    })
+                    .show();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.easylist) {  // EasyList.
+            // Toggle the EasyList status.
+            currentWebView.enableBlocklist(NestedScrollWebView.EASYLIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
+
+            // Update the menu checkbox.
+            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.easyprivacy) {  // EasyPrivacy.
+            // Toggle the EasyPrivacy status.
+            currentWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
+
+            // Update the menu checkbox.
+            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.fanboys_annoyance_list) {  // Fanboy's Annoyance List.
+            // Toggle Fanboy's Annoyance List status.
+            currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+
+            // Update the menu checkbox.
+            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+
+            // Update the staus of Fanboy's Social Blocking List.
+            optionsFanboysSocialBlockingListMenuItem.setEnabled(!currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.fanboys_social_blocking_list) {  // Fanboy's Social Blocking List.
+            // Toggle Fanboy's Social Blocking List status.
+            currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+
+            // Update the menu checkbox.
+            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.ultralist) {  // UltraList.
+            // Toggle the UltraList status.
+            currentWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
+
+            // Update the menu checkbox.
+            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.ultraprivacy) {  // UltraPrivacy.
+            // Toggle the UltraPrivacy status.
+            currentWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
+
+            // Update the menu checkbox.
+            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.block_all_third_party_requests) {  // Block all third-party requests.
+            //Toggle the third-party requests blocker status.
+            currentWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, !currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+
+            // Update the menu checkbox.
+            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.proxy_none) {  // Proxy - None.
+            // Update the proxy mode.
+            proxyMode = ProxyHelper.NONE;
+
+            // Apply the proxy mode.
+            applyProxy(true);
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.proxy_tor) {  // Proxy - Tor.
+            // Update the proxy mode.
+            proxyMode = ProxyHelper.TOR;
+
+            // Apply the proxy mode.
+            applyProxy(true);
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.proxy_i2p) {  // Proxy - I2P.
+            // Update the proxy mode.
+            proxyMode = ProxyHelper.I2P;
+
+            // Apply the proxy mode.
+            applyProxy(true);
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.proxy_custom) {  // Proxy - Custom.
+            // Update the proxy mode.
+            proxyMode = ProxyHelper.CUSTOM;
+
+            // Apply the proxy mode.
+            applyProxy(true);
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_privacy_browser) {  // User Agent - Privacy Browser.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_webview_default) {  // User Agent - WebView Default.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString("");
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_firefox_on_android) {  // User Agent - Firefox on Android.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_chrome_on_android) {  // User Agent - Chrome on Android.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_safari_on_ios) {  // User Agent - Safari on iOS.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_firefox_on_linux) {  // User Agent - Firefox on Linux.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_chromium_on_linux) {  // User Agent - Chromium on Linux.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_firefox_on_windows) {  // User Agent - Firefox on Windows.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_chrome_on_windows) {  // User Agent - Chrome on Windows.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_edge_on_windows) {  // User Agent - Edge on Windows.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_internet_explorer_on_windows) {  // User Agent - Internet Explorer on Windows.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_safari_on_macos) {  // User Agent - Safari on macOS.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.user_agent_custom) {  // User Agent - Custom.
+            // Update the user agent.
+            currentWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
+
+            // Reload the current WebView.
+            currentWebView.reload();
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.font_size) {  // Font size.
+            // Instantiate the font size dialog.
+            DialogFragment fontSizeDialogFragment = FontSizeDialog.displayDialog(currentWebView.getSettings().getTextZoom());
+
+            // Show the font size dialog.
+            fontSizeDialogFragment.show(getSupportFragmentManager(), getString(R.string.font_size));
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.swipe_to_refresh) {  // Swipe to refresh.
+            // Toggle the stored status of swipe to refresh.
+            currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
+
+            // Update the swipe refresh layout.
+            if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
+                // Only enable the swipe refresh layout if the WebView is scrolled to the top.  It is updated every time the scroll changes.
+                swipeRefreshLayout.setEnabled(currentWebView.getScrollY() == 0);
+            } else {  // Swipe to refresh is disabled.
+                // Disable the swipe refresh layout.
+                swipeRefreshLayout.setEnabled(false);
+            }
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.wide_viewport) {  // Wide viewport.
+            // Toggle the viewport.
+            currentWebView.getSettings().setUseWideViewPort(!currentWebView.getSettings().getUseWideViewPort());
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.display_images) {  // Display images.
+            // Toggle the displaying of images.
+            if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
+                // Disable loading of images.
+                currentWebView.getSettings().setLoadsImagesAutomatically(false);
+
+                // Reload the website to remove existing images.
+                currentWebView.reload();
+            } else {  // Images are not currently loaded automatically.
+                // Enable loading of images.  Missing images will be loaded without the need for a reload.
+                currentWebView.getSettings().setLoadsImagesAutomatically(true);
+            }
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.dark_webview) {  // Dark WebView.
+            // Check to see if dark WebView is supported by this WebView.
+            if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
+                // Toggle the dark WebView setting.
+                if (WebSettingsCompat.getForceDark(currentWebView.getSettings()) == WebSettingsCompat.FORCE_DARK_ON) {  // Dark WebView is currently enabled.
+                    // Turn off dark WebView.
+                    WebSettingsCompat.setForceDark(currentWebView.getSettings(), WebSettingsCompat.FORCE_DARK_OFF);
+                } else {  // Dark WebView is currently disabled.
+                    // Turn on dark WebView.
+                    WebSettingsCompat.setForceDark(currentWebView.getSettings(), WebSettingsCompat.FORCE_DARK_ON);
+                }
+            }
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.find_on_page) {  // Find on page.
+            // Get a handle for the views.
+            Toolbar toolbar = findViewById(R.id.toolbar);
+            LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
+            EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
+
+            // Set the minimum height of the find on page linear layout to match the toolbar.
+            findOnPageLinearLayout.setMinimumHeight(toolbar.getHeight());
+
+            // Hide the toolbar.
+            toolbar.setVisibility(View.GONE);
+
+            // Show the find on page linear layout.
+            findOnPageLinearLayout.setVisibility(View.VISIBLE);
+
+            // Display the keyboard.  The app must wait 200 ms before running the command to work around a bug in Android.
+            // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
+            findOnPageEditText.postDelayed(() -> {
+                // Set the focus on the find on page edit text.
+                findOnPageEditText.requestFocus();
+
+                // Get a handle for the input method manager.
+                InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+
+                // Remove the lint warning below that the input method manager might be null.
+                assert inputMethodManager != null;
+
+                // Display the keyboard.  `0` sets no input flags.
+                inputMethodManager.showSoftInput(findOnPageEditText, 0);
+            }, 200);
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.print) {  // Print.
+            // Get a print manager instance.
+            PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
+
+            // Remove the lint error below that print manager might be null.
+            assert printManager != null;
+
+            // Create a print document adapter from the current WebView.
+            PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
+
+            // Print the document.
+            printManager.print(getString(R.string.privacy_browser_webpage), printDocumentAdapter, null);
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.save_url) {  // Save URL.
+            // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
+            new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
+                    currentWebView.getAcceptFirstPartyCookies()).execute(currentWebView.getCurrentUrl());
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.save_archive) {
+            // Instantiate the save dialog.
+            DialogFragment saveArchiveFragment = SaveWebpageDialog.saveWebpage(SaveWebpageDialog.SAVE_ARCHIVE, currentWebView.getCurrentUrl(), null, null, null,
+                    false);
+
+            // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
+            saveArchiveFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
+
+            return true;
+        } else if (menuItemId == R.id.save_image) {  // Save image.
+            // Instantiate the save dialog.
+            DialogFragment saveImageFragment = SaveWebpageDialog.saveWebpage(SaveWebpageDialog.SAVE_IMAGE, currentWebView.getCurrentUrl(), null, null, null,
+                    false);
+
+            // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
+            saveImageFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.add_to_homescreen) {  // Add to homescreen.
+            // Instantiate the create home screen shortcut dialog.
+            DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
+                    currentWebView.getFavoriteOrDefaultIcon());
+
+            // Show the create home screen shortcut dialog.
+            createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.view_source) {  // View source.
+            // Create an intent to launch the view source activity.
+            Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
+
+            // Add the variables to the intent.
+            viewSourceIntent.putExtra(ViewSourceActivityKt.CURRENT_URL, currentWebView.getUrl());
+            viewSourceIntent.putExtra(ViewSourceActivityKt.USER_AGENT, currentWebView.getSettings().getUserAgentString());
+
+            // Make it so.
+            startActivity(viewSourceIntent);
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.share_url) {  // Share URL.
+            // Setup the share string.
+            String shareString = currentWebView.getTitle() + " – " + currentWebView.getUrl();
+
+            // Create the share intent.
+            Intent shareIntent = new Intent(Intent.ACTION_SEND);
+
+            // Add the share string to the intent.
+            shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
+
+            // Set the MIME type.
+            shareIntent.setType("text/plain");
+
+            // Set the intent to open in a new task.
+            shareIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+            // Make it so.
+            startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.open_with_app) {  // Open with app.
+            // Open the URL with an outside app.
+            openWithApp(currentWebView.getUrl());
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.open_with_browser) {  // Open with browser.
+            // Open the URL with an outside browser.
+            openWithBrowser(currentWebView.getUrl());
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.add_or_edit_domain) {  // Add or edit domain.
+            // Check if domain settings currently exist.
+            if (currentWebView.getDomainSettingsApplied()) {  // Edit the current domain settings.
+                // Reapply the domain settings on returning to `MainWebViewActivity`.
+                reapplyDomainSettingsOnRestart = true;
+
+                // Create an intent to launch the domains activity.
+                Intent domainsIntent = new Intent(this, DomainsActivity.class);
+
+                // Add the extra information to the intent.
+                domainsIntent.putExtra("load_domain", currentWebView.getDomainSettingsDatabaseId());
+                domainsIntent.putExtra("close_on_back", true);
+                domainsIntent.putExtra("current_url", currentWebView.getUrl());
+
+                // Get the current certificate.
+                SslCertificate sslCertificate = currentWebView.getCertificate();
+
+                // Check to see if the SSL certificate is populated.
+                if (sslCertificate != null) {
+                    // Extract the certificate to strings.
+                    String issuedToCName = sslCertificate.getIssuedTo().getCName();
+                    String issuedToOName = sslCertificate.getIssuedTo().getOName();
+                    String issuedToUName = sslCertificate.getIssuedTo().getUName();
+                    String issuedByCName = sslCertificate.getIssuedBy().getCName();
+                    String issuedByOName = sslCertificate.getIssuedBy().getOName();
+                    String issuedByUName = sslCertificate.getIssuedBy().getUName();
+                    long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
+                    long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
+
+                    // Add the certificate to the intent.
+                    domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
+                    domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
+                    domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
+                    domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
+                    domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
+                    domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
+                    domainsIntent.putExtra("ssl_start_date", startDateLong);
+                    domainsIntent.putExtra("ssl_end_date", endDateLong);
+                }
+
+                // Check to see if the current IP addresses have been received.
+                if (currentWebView.hasCurrentIpAddresses()) {
+                    // Add the current IP addresses to the intent.
+                    domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
+                }
+
+                // Make it so.
+                startActivity(domainsIntent);
+            } else {  // Add a new domain.
+                // Apply the new domain settings on returning to `MainWebViewActivity`.
+                reapplyDomainSettingsOnRestart = true;
+
+                // Get the current domain
+                Uri currentUri = Uri.parse(currentWebView.getUrl());
+                String currentDomain = currentUri.getHost();
+
+                // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
+                DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
+
+                // Create the domain and store the database ID.
+                int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
+
+                // Create an intent to launch the domains activity.
+                Intent domainsIntent = new Intent(this, DomainsActivity.class);
+
+                // Add the extra information to the intent.
+                domainsIntent.putExtra("load_domain", newDomainDatabaseId);
+                domainsIntent.putExtra("close_on_back", true);
+                domainsIntent.putExtra("current_url", currentWebView.getUrl());
+
+                // Get the current certificate.
+                SslCertificate sslCertificate = currentWebView.getCertificate();
+
+                // Check to see if the SSL certificate is populated.
+                if (sslCertificate != null) {
+                    // Extract the certificate to strings.
+                    String issuedToCName = sslCertificate.getIssuedTo().getCName();
+                    String issuedToOName = sslCertificate.getIssuedTo().getOName();
+                    String issuedToUName = sslCertificate.getIssuedTo().getUName();
+                    String issuedByCName = sslCertificate.getIssuedBy().getCName();
+                    String issuedByOName = sslCertificate.getIssuedBy().getOName();
+                    String issuedByUName = sslCertificate.getIssuedBy().getUName();
+                    long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
+                    long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
+
+                    // Add the certificate to the intent.
+                    domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
+                    domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
+                    domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
+                    domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
+                    domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
+                    domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
+                    domainsIntent.putExtra("ssl_start_date", startDateLong);
+                    domainsIntent.putExtra("ssl_end_date", endDateLong);
+                }
+
+                // Check to see if the current IP addresses have been received.
+                if (currentWebView.hasCurrentIpAddresses()) {
+                    // Add the current IP addresses to the intent.
+                    domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
+                }
+
+                // Make it so.
+                startActivity(domainsIntent);
+            }
+
+            // Consume the event.
+            return true;
+        } else if (menuItemId == R.id.ad_consent) {  // Ad consent.
+            // Instantiate the ad consent dialog.
+            DialogFragment adConsentDialogFragment = new AdConsentDialog();
+
+            // Display the ad consent dialog.
+            adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
+
+            // Consume the event.
+            return true;
+        } else {  // There is no match with the options menu.  Pass the event up to the parent method.
+            // Don't consume the event.
+            return super.onOptionsItemSelected(menuItem);
+        }
+    }
+
+    // removeAllCookies is deprecated, but it is required for API < 21.
+    @Override
+    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+        // Get the menu item ID.
+        int menuItemId = menuItem.getItemId();
+
+        // Run the commands that correspond to the selected menu item.
+        if (menuItemId == R.id.clear_and_exit) {  // Clear and exit.
+            // Clear and exit Privacy Browser.
+            clearAndExit();
+        } else if (menuItemId == R.id.home) {  // Home.
+            // Load the homepage.
+            loadUrl(currentWebView, sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
+        } else if (menuItemId == R.id.back) {  // Back.
+            // Check if the WebView can go back.
+            if (currentWebView.canGoBack()) {
+                // Get the current web back forward list.
+                WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
+
+                // Get the previous entry URL.
+                String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
+
+                // Apply the domain settings.
+                applyDomainSettings(currentWebView, previousUrl, false, false, false);
+
+                // Load the previous website in the history.
+                currentWebView.goBack();
+            }
+        } else if (menuItemId == R.id.forward) {  // Forward.
+            // Check if the WebView can go forward.
+            if (currentWebView.canGoForward()) {
+                // Get the current web back forward list.
+                WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
+
+                // Get the next entry URL.
+                String nextUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() + 1).getUrl();
+
+                // Apply the domain settings.
+                applyDomainSettings(currentWebView, nextUrl, false, false, false);
+
+                // Load the next website in the history.
+                currentWebView.goForward();
+            }
+        } else if (menuItemId == R.id.history) {  // History.
+            // Instantiate the URL history dialog.
+            DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
+
+            // Show the URL history dialog.
+            urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
+        } else if (menuItemId == R.id.open) {  // Open.
+            // Instantiate the open file dialog.
+            DialogFragment openDialogFragment = new OpenDialog();
+
+            // Show the open file dialog.
+            openDialogFragment.show(getSupportFragmentManager(), getString(R.string.open));
+        } else if (menuItemId == R.id.requests) {  // Requests.
+            // Populate the resource requests.
+            RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
+
+            // Create an intent to launch the Requests activity.
+            Intent requestsIntent = new Intent(this, RequestsActivity.class);
+
+            // Add the block third-party requests status to the intent.
+            requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+
+            // Make it so.
+            startActivity(requestsIntent);
+        } else if (menuItemId == R.id.downloads) {  // Downloads.
+            // Launch the system Download Manager.
+            Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+
+            // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
+            downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+            // Make it so.
+            startActivity(downloadManagerIntent);
+        } else if (menuItemId == R.id.domains) {  // Domains.
+            // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
+            reapplyDomainSettingsOnRestart = true;
+
+            // Launch the domains activity.
+            Intent domainsIntent = new Intent(this, DomainsActivity.class);
+
+            // Add the extra information to the intent.
+            domainsIntent.putExtra("current_url", currentWebView.getUrl());
+
+            // Get the current certificate.
+            SslCertificate sslCertificate = currentWebView.getCertificate();
+
+            // Check to see if the SSL certificate is populated.
+            if (sslCertificate != null) {
+                // Extract the certificate to strings.
+                String issuedToCName = sslCertificate.getIssuedTo().getCName();
+                String issuedToOName = sslCertificate.getIssuedTo().getOName();
+                String issuedToUName = sslCertificate.getIssuedTo().getUName();
+                String issuedByCName = sslCertificate.getIssuedBy().getCName();
+                String issuedByOName = sslCertificate.getIssuedBy().getOName();
+                String issuedByUName = sslCertificate.getIssuedBy().getUName();
+                long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
+                long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
+
+                // Add the certificate to the intent.
+                domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
+                domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
+                domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
+                domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
+                domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
+                domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
+                domainsIntent.putExtra("ssl_start_date", startDateLong);
+                domainsIntent.putExtra("ssl_end_date", endDateLong);
+            }
+
+            // Check to see if the current IP addresses have been received.
+            if (currentWebView.hasCurrentIpAddresses()) {
+                // Add the current IP addresses to the intent.
+                domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
+            }
+
+            // Make it so.
+            startActivity(domainsIntent);
+        } else if (menuItemId == R.id.settings) {  // Settings.
+            // Set the flag to reapply app settings on restart when returning from Settings.
+            reapplyAppSettingsOnRestart = true;
+
+            // Set the flag to reapply the domain settings on restart when returning from Settings.
+            reapplyDomainSettingsOnRestart = true;
+
+            // Launch the settings activity.
+            Intent settingsIntent = new Intent(this, SettingsActivity.class);
+            startActivity(settingsIntent);
+        } else if (menuItemId == R.id.import_export) { // Import/Export.
+            // Create an intent to launch the import/export activity.
+            Intent importExportIntent = new Intent(this, ImportExportActivity.class);
+
+            // Make it so.
+            startActivity(importExportIntent);
+        } else if (menuItemId == R.id.logcat) {  // Logcat.
+            // Create an intent to launch the logcat activity.
+            Intent logcatIntent = new Intent(this, LogcatActivity.class);
+
+            // Make it so.
+            startActivity(logcatIntent);
+        } else if (menuItemId == R.id.guide) {  // Guide.
+            // Create an intent to launch the guide activity.
+            Intent guideIntent = new Intent(this, GuideActivity.class);
+
+            // Make it so.
+            startActivity(guideIntent);
+        } else if (menuItemId == R.id.about) {  // About
+            // Create an intent to launch the about activity.
+            Intent aboutIntent = new Intent(this, AboutActivity.class);
+
+            // Create a string array for the blocklist versions.
+            String[] blocklistVersions = new String[]{easyList.get(0).get(0)[0], easyPrivacy.get(0).get(0)[0], fanboysAnnoyanceList.get(0).get(0)[0], fanboysSocialList.get(0).get(0)[0],
+                    ultraList.get(0).get(0)[0], ultraPrivacy.get(0).get(0)[0]};
+
+            // Add the blocklist versions to the intent.
+            aboutIntent.putExtra("blocklist_versions", blocklistVersions);
+
+            // Make it so.
+            startActivity(aboutIntent);
+        }
+
+        // Close the navigation drawer.
+        drawerLayout.closeDrawer(GravityCompat.START);
+        return true;
+    }
+
+    @Override
+    public void onPostCreate(Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onPostCreate(savedInstanceState);
+
+        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
+        actionBarDrawerToggle.syncState();
+    }
+
+    @Override
+    public void onConfigurationChanged(@NonNull Configuration newConfig) {
+        // Run the default commands.
+        super.onConfigurationChanged(newConfig);
+
+        // Reload the ad for the free flavor if not in full screen mode.
+        if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
+            // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+            View adView = findViewById(R.id.adview);
+
+            // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
+            // `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
+            AdHelper.loadAd(adView, getApplicationContext(), this, getString(R.string.ad_unit_id));
+        }
+
+        // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
+        // https://code.google.com/p/android/issues/detail?id=20493#c8
+        // ActivityCompat.invalidateOptionsMenu(this);
+    }
+
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
+        // Get the hit test result.
+        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
+
+        // Define the URL strings.
+        final String imageUrl;
+        final String linkUrl;
+
+        // Get handles for the system managers.
+        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+
+        // Remove the lint errors below that the clipboard manager might be null.
+        assert clipboardManager != null;
+
+        // Process the link according to the type.
+        switch (hitTestResult.getType()) {
+            // `SRC_ANCHOR_TYPE` is a link.
+            case WebView.HitTestResult.SRC_ANCHOR_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
+
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
+
+                // Add an Open in New Tab entry.
+                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the link URL in a new tab and move to it.
+                    addNewTab(linkUrl, true);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an Open in Background entry.
+                menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the link URL in a new tab but do not move to it.
+                    addNewTab(linkUrl, false);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(linkUrl);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(linkUrl);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add a Copy URL entry.
+                menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Save the link URL in a `ClipData`.
+                    ClipData srcAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
+
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add a Save URL entry.
+                menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
+                    new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
+                            currentWebView.getAcceptFirstPartyCookies()).execute(linkUrl);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an empty Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
+
+            // `IMAGE_TYPE` is an image.
+            case WebView.HitTestResult.IMAGE_TYPE:
+                // Get the image URL.
+                imageUrl = hitTestResult.getExtra();
+
+                // Remove the incorrect lint warning below that the image URL might be null.
+                assert imageUrl != null;
+
+                // Set the context menu title.
+                if (imageUrl.startsWith("data:")) {  // The image data is contained in within the URL, making it exceedingly long.
+                    // Truncate the image URL before making it the title.
+                    menu.setHeaderTitle(imageUrl.substring(0, 100));
+                } else {  // The image URL does not contain the full image data.
+                    // Set the image URL as the title of the context menu.
+                    menu.setHeaderTitle(imageUrl);
+                }
+
+                // Add an Open in New Tab entry.
+                menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the image in a new tab.
+                    addNewTab(imageUrl, true);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Open the image URL with an external app.
+                    openWithApp(imageUrl);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Open the image URL with an external browser.
+                    openWithBrowser(imageUrl);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
+                    // Load the image in the current tab.
+                    loadUrl(currentWebView, imageUrl);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add a Save Image entry.
+                menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
+                   // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
+                    new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
+                            currentWebView.getAcceptFirstPartyCookies()).execute(imageUrl);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add a Copy URL entry.
+                menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Save the image URL in a clip data.
+                    ClipData imageTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
+
+                    // Set the clip data as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(imageTypeClipData);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an empty Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
+
+            // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
+            case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
+                // Get the image URL.
+                imageUrl = hitTestResult.getExtra();
+
+                // Instantiate a handler.
+                Handler handler = new Handler();
+
+                // Get a message from the handler.
+                Message message = handler.obtainMessage();
+
+                // Request the image details from the last touched node be returned in the message.
+                currentWebView.requestFocusNodeHref(message);
+
+                // Get the link URL from the message data.
+                linkUrl = message.getData().getString("url");
+
+                // Set the link URL as the title of the context menu.
+                menu.setHeaderTitle(linkUrl);
+
+                // Add an Open in New Tab entry.
+                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the link URL in a new tab and move to it.
+                    addNewTab(linkUrl, true);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an Open in Background entry.
+                menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Lod the link URL in a new tab but do not move to it.
+                    addNewTab(linkUrl, false);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an Open Image in New Tab entry.
+                menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the image in a new tab and move to it.
+                    addNewTab(imageUrl, true);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Open the link URL with an external app.
+                    openWithApp(linkUrl);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Open the link URL with an external browser.
+                    openWithBrowser(linkUrl);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener((MenuItem item) -> {
+                   // View the image in the current tab.
+                   loadUrl(currentWebView, imageUrl);
+
+                   // Consume the event.
+                   return true;
+                });
+
+                // Add a Save Image entry.
+                menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
+                    new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
+                            currentWebView.getAcceptFirstPartyCookies()).execute(imageUrl);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add a Copy URL entry.
+                menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Save the link URL in a clip data.
+                    ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
+
+                    // Set the clip data as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add a Save URL entry.
+                menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
+                    new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
+                            currentWebView.getAcceptFirstPartyCookies()).execute(linkUrl);
+
+                    // Consume the event.
+                    return true;
+                });
+
+                // Add an empty Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
+
+            case WebView.HitTestResult.EMAIL_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
+
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
+
+                // Add a Write Email entry.
+                menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
+                    // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
+                    Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
+
+                    // Parse the url and set it as the data for the `Intent`.
+                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
+
+                    // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
+                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+                    try {
+                        // Make it so.
+                        startActivity(emailIntent);
+                    } catch (ActivityNotFoundException exception) {
+                        // Display a snackbar.
+                        Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
+                    }
 
-        // This is needed to get rid of the Android Studio warning that `appBar` might be null.
-        assert appBar != null;
+                    // Consume the event.
+                    return true;
+                });
 
-        // Add the custom `url_app_bar` layout, which shows the favorite icon and the URL text bar.
-        appBar.setCustomView(R.layout.url_app_bar);
-        appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
+                // Add a Copy Email Address entry.
+                menu.add(R.string.copy_email_address).setOnMenuItemClickListener(item -> {
+                    // Save the email address in a `ClipData`.
+                    ClipData srcEmailTypeClipData = ClipData.newPlainText(getString(R.string.email_address), linkUrl);
 
-        // Initialize the foreground color spans for highlighting the URLs.  We have to use the deprecated `getColor()` until API >= 23.
-        redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
-        initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
-        finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
 
-        // Get a handle for `urlTextBox`.
-        urlTextBox = findViewById(R.id.url_edittext);
+                    // Consume the event.
+                    return true;
+                });
 
-        // Remove the formatting from `urlTextBar` when the user is editing the text.
-        urlTextBox.setOnFocusChangeListener((View v, boolean hasFocus) -> {
-            if (hasFocus) {  // The user is editing `urlTextBox`.
-                // Remove the highlighting.
-                urlTextBox.getText().removeSpan(redColorSpan);
-                urlTextBox.getText().removeSpan(initialGrayColorSpan);
-                urlTextBox.getText().removeSpan(finalGrayColorSpan);
-            } else {  // The user has stopped editing `urlTextBox`.
-                // Reapply the highlighting.
-                highlightUrlText();
-            }
-        });
+                // Add an empty Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
+        }
+    }
 
-        // Set the go button on the keyboard to load the URL in `urlTextBox`.
-        urlTextBox.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
-            // If the event is a key-down event on the `enter` button, load the URL.
-            if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
-                // Load the URL into the mainWebView and consume the event.
-                try {
-                    loadUrlFromTextBox();
-                } catch (UnsupportedEncodingException e) {
-                    e.printStackTrace();
-                }
-                // If the enter key was pressed, consume the event.
-                return true;
-            } else {
-                // If any other key was pressed, do not consume the event.
-                return false;
+    @Override
+    public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
+
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
+
+        // Get the views from the dialog fragment.
+        EditText createBookmarkNameEditText = dialog.findViewById(R.id.create_bookmark_name_edittext);
+        EditText createBookmarkUrlEditText = dialog.findViewById(R.id.create_bookmark_url_edittext);
+
+        // Extract the strings from the edit texts.
+        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
+
+        // Create a favorite icon byte array output stream.
+        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+
+        // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+        favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
+
+        // Convert the favorite icon byte array stream to a byte array.
+        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
+
+        // Display the new bookmark below the current items in the (0 indexed) list.
+        int newBookmarkDisplayOrder = bookmarksListView.getCount();
+
+        // Create the bookmark.
+        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
+
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+
+        // Scroll to the new bookmark.
+        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+    }
+
+    @Override
+    public void onCreateBookmarkFolder(DialogFragment dialogFragment, @NonNull Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
+
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
+
+        // Get handles for the views in the dialog fragment.
+        EditText folderNameEditText = dialog.findViewById(R.id.folder_name_edittext);
+        RadioButton defaultIconRadioButton = dialog.findViewById(R.id.default_icon_radiobutton);
+        ImageView defaultIconImageView = dialog.findViewById(R.id.default_icon_imageview);
+
+        // Get new folder name string.
+        String folderNameString = folderNameEditText.getText().toString();
+
+        // Create a folder icon bitmap.
+        Bitmap folderIconBitmap;
+
+        // Set the folder icon bitmap according to the dialog.
+        if (defaultIconRadioButton.isChecked()) {  // Use the default folder icon.
+            // Get the default folder icon drawable.
+            Drawable folderIconDrawable = defaultIconImageView.getDrawable();
+
+            // Convert the folder icon drawable to a bitmap drawable.
+            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+
+            // Convert the folder icon bitmap drawable to a bitmap.
+            folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+        } else {  // Use the WebView favorite icon.
+            // Copy the favorite icon bitmap to the folder icon bitmap.
+            folderIconBitmap = favoriteIconBitmap;
+        }
+
+        // Create a folder icon byte array output stream.
+        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
+
+        // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+        folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
+
+        // Convert the folder icon byte array stream to a byte array.
+        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+
+        // Move all the bookmarks down one in the display order.
+        for (int i = 0; i < bookmarksListView.getCount(); i++) {
+            int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
+            bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
+        }
+
+        // Create the folder, which will be placed at the top of the `ListView`.
+        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
+
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+
+        // Scroll to the new folder.
+        bookmarksListView.setSelection(0);
+    }
+
+    @Override
+    public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, @NonNull Bitmap favoriteIconBitmap) {
+        // Remove the incorrect lint warning below that the dialog fragment might be null.
+        assert dialogFragment != null;
+
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
+
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
+
+        // Get handles for the views from the dialog.
+        RadioButton currentFolderIconRadioButton = dialog.findViewById(R.id.current_icon_radiobutton);
+        RadioButton defaultFolderIconRadioButton = dialog.findViewById(R.id.default_icon_radiobutton);
+        ImageView defaultFolderIconImageView = dialog.findViewById(R.id.default_icon_imageview);
+        EditText editFolderNameEditText = dialog.findViewById(R.id.folder_name_edittext);
+
+        // Get the new folder name.
+        String newFolderNameString = editFolderNameEditText.getText().toString();
+
+        // Check if the favorite icon has changed.
+        if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
+            // Update the name in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
+        } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
+            // Create the new folder icon Bitmap.
+            Bitmap folderIconBitmap;
+
+            // Populate the new folder icon bitmap.
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable.
+                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
+
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+
+                // Convert the folder icon bitmap drawable to a bitmap.
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {  // Use the `WebView` favorite icon.
+                // Copy the favorite icon bitmap to the folder icon bitmap.
+                folderIconBitmap = favoriteIconBitmap;
             }
-        });
 
-        // Set `waitingForOrbotHTMLString`.
-        waitingForOrbotHTMLString = "<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>";
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-        // Initialize `currentDomainName`, `orbotStatus`, and `waitingForOrbot`.
-        currentDomainName = "";
-        orbotStatus = "unknown";
-        waitingForOrbot = false;
+            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
 
-        // Create an Orbot status `BroadcastReceiver`.
-        BroadcastReceiver orbotStatusBroadcastReceiver = new BroadcastReceiver() {
-            @Override
-            public void onReceive(Context context, Intent intent) {
-                // Store the content of the status message in `orbotStatus`.
-                orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+
+            // Update the folder icon in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, newFolderIconByteArray);
+        } else {  // The folder icon and the name have changed.
+            // Get the new folder icon bitmap.
+            Bitmap folderIconBitmap;
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable.
+                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 
-                // If we are waiting on Orbot, load the website now that Orbot is connected.
-                if (orbotStatus.equals("ON") && waitingForOrbot) {
-                    // Reset `waitingForOrbot`.
-                    waitingForOrbot = false;
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                    // Load `formattedUrlString
-                    loadUrl(formattedUrlString);
-                }
+                // Convert the folder icon bitmap drawable to a bitmap.
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {  // Use the `WebView` favorite icon.
+                // Copy the favorite icon bitmap to the folder icon bitmap.
+                folderIconBitmap = favoriteIconBitmap;
             }
-        };
 
-        // Register `orbotStatusBroadcastReceiver` on `this` context.
-        this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-        // Get handles for views that need to be accessed.
-        drawerLayout = findViewById(R.id.drawerlayout);
-        rootCoordinatorLayout = findViewById(R.id.root_coordinatorlayout);
-        bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
-        bookmarksTitleTextView = findViewById(R.id.bookmarks_title_textview);
-        FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
-        FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
-        FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
-        mainWebViewRelativeLayout = findViewById(R.id.main_webview_relativelayout);
-        mainWebView = findViewById(R.id.main_webview);
-        findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
-        findOnPageEditText = findViewById(R.id.find_on_page_edittext);
-        fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
-        urlAppBarRelativeLayout = findViewById(R.id.url_app_bar_relativelayout);
-        favoriteIconImageView = findViewById(R.id.favorite_icon);
-
-        // Set the bookmarks drawer resources according to the theme.  This can't be done in the layout due to compatibility issues with the `DrawerLayout` support widget.
-        if (darkTheme) {
-            launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_dark));
-            createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_dark));
-            createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_dark));
-            bookmarksListView.setBackgroundColor(getResources().getColor(R.color.gray_850));
-        } else {
-            launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_light));
-            createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_light));
-            createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_light));
-            bookmarksListView.setBackgroundColor(getResources().getColor(R.color.white));
+            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
+
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+
+            // Update the folder name and icon in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
         }
 
-        // Set the launch bookmarks activity FAB to launch the bookmarks activity.
-        launchBookmarksActivityFab.setOnClickListener(v -> {
-            // Create an intent to launch the bookmarks activity.
-            Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-            // Include the current folder with the `Intent`.
-            bookmarksIntent.putExtra("Current Folder", currentBookmarksFolder);
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
 
-            // Make it so.
-            startActivity(bookmarksIntent);
-        });
+    // Override `onBackPressed()` to handle the navigation drawer and and the WebViews.
+    @Override
+    public void onBackPressed() {
+        // Check the different options for processing `back`.
+        if (drawerLayout.isDrawerVisible(GravityCompat.START)) {  // The navigation drawer is open.
+            // Close the navigation drawer.
+            drawerLayout.closeDrawer(GravityCompat.START);
+        } else if (drawerLayout.isDrawerVisible(GravityCompat.END)){  // The bookmarks drawer is open.
+            // close the bookmarks drawer.
+            drawerLayout.closeDrawer(GravityCompat.END);
+        } else if (displayingFullScreenVideo) {  // A full screen video is shown.
+            // Re-enable the screen timeout.
+            fullScreenVideoFrameLayout.setKeepScreenOn(false);
 
-        // Set the create new bookmark folder FAB to display the `AlertDialog`.
-        createBookmarkFolderFab.setOnClickListener(v -> {
-            // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
-            AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
-            createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
-        });
+            // Unset the full screen video flag.
+            displayingFullScreenVideo = false;
 
-        // Set the create new bookmark FAB to display the `AlertDialog`.
-        createBookmarkFab.setOnClickListener(view -> {
-            // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
-            AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
-            createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
-        });
+            // Remove all the views from the full screen video frame layout.
+            fullScreenVideoFrameLayout.removeAllViews();
 
-        // Create a double-tap listener to toggle full-screen mode.
-        final GestureDetector gestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
-            // Override `onDoubleTap()`.  All other events are handled using the default settings.
-            @Override
-            public boolean onDoubleTap(MotionEvent event) {
-                if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
-                    // Toggle `inFullScreenBrowsingMode`.
-                    inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
+            // Hide the full screen video frame layout.
+            fullScreenVideoFrameLayout.setVisibility(View.GONE);
 
-                    if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
-                        // Hide the `appBar`.
-                        appBar.hide();
+            // Enable the sliding drawers.
+            drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 
-                        // Hide the `BannerAd` in the free flavor.
-                        if (BuildConfig.FLAVOR.contentEquals("free")) {
-                            BannerAd.hideAd(adView);
-                        }
+            // Show the main content relative layout.
+            mainContentRelativeLayout.setVisibility(View.VISIBLE);
 
-                        // Modify the system bars.
-                        if (hideSystemBarsOnFullscreen) {  // Hide everything.
-                            // Remove the translucent overlays.
-                            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
-
-                            // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
-                            drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
-
-                            /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-                             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-                             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically rehides them after they are shown.
-                             */
-                            rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-
-                            // Set `rootCoordinatorLayout` to fill the whole screen.
-                            rootCoordinatorLayout.setFitsSystemWindows(false);
-                        } else {  // Hide everything except the status and navigation bars.
-                            // Set `rootCoordinatorLayout` to fit under the status and navigation bars.
-                            rootCoordinatorLayout.setFitsSystemWindows(false);
-
-                            // There is an Android Support Library bug that causes a scrim to print on the right side of the `Drawer Layout` when the navigation bar is displayed on the right of the screen.
-                            if (translucentNavigationBarOnFullscreen) {
-                                // Set the navigation bar to be translucent.
-                                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
-                            }
-                        }
-                    } else {  // Switch to normal viewing mode.
-                        // Show the `appBar`.
-                        appBar.show();
+            // Apply the appropriate full screen mode flags.
+            if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
+                // Hide the banner ad in the free flavor.
+                if (BuildConfig.FLAVOR.contentEquals("free")) {
+                    // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+                    View adView = findViewById(R.id.adview);
 
-                        // Show the `BannerAd` in the free flavor.
-                        if (BuildConfig.FLAVOR.contentEquals("free")) {
-                            // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
-                            BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
+                    // Hide the banner ad.
+                    AdHelper.hideAd(adView);
+                }
 
-                            // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
-                            adView = findViewById(R.id.adview);
-                        }
+                /* Hide the system bars.
+                 * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                 * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                 * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                 * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                 */
+                rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                        View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
 
-                        // Remove the translucent navigation bar flag if it is set.
-                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+                // Reload the website if the app bar is hidden.  Otherwise, there is some bug in Android that causes the WebView to be entirely black.
+                if (hideAppBar) {
+                    // Reload the WebView.
+                    currentWebView.reload();
+                }
+            } else {  // Switch to normal viewing mode.
+                // Remove the `SYSTEM_UI` flags from the root frame layout.
+                rootFrameLayout.setSystemUiVisibility(0);
+            }
 
-                        // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
-                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            // Reload the ad for the free flavor if not in full screen mode.
+            if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
+                // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+                View adView = findViewById(R.id.adview);
 
-                        // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                        rootCoordinatorLayout.setSystemUiVisibility(0);
+                // Reload the ad.  `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
+                AdHelper.loadAd(adView, getApplicationContext(), this, getString(R.string.ad_unit_id));
+            }
+        } else if (currentWebView.canGoBack()) {  // There is at least one item in the current WebView history.
+            // Get the current web back forward list.
+            WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-                        // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-                        rootCoordinatorLayout.setFitsSystemWindows(true);
-                    }
+            // Get the previous entry URL.
+            String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
 
-                    // Consume the double-tap.
-                    return true;
-                } else { // Do not consume the double-tap because full screen browsing mode is disabled.
-                    return false;
-                }
+            // Apply the domain settings.
+            applyDomainSettings(currentWebView, previousUrl, false, false, false);
+
+            // Go back.
+            currentWebView.goBack();
+        } else if (tabLayout.getTabCount() > 1) {  // There are at least two tabs.
+            // Close the current tab.
+            closeCurrentTab();
+        } else {  // There isn't anything to do in Privacy Browser.
+            // Close Privacy Browser.  `finishAndRemoveTask()` also removes Privacy Browser from the recent app list.
+            if (Build.VERSION.SDK_INT >= 21) {
+                finishAndRemoveTask();
+            } else {
+                finish();
             }
-        });
 
-        // Pass all touch events on `mainWebView` through `gestureDetector` to check for double-taps.
-        mainWebView.setOnTouchListener((View v, MotionEvent event) -> {
-            // Call `performClick()` on the view, which is required for accessibility.
-            v.performClick();
+            // Manually kill Privacy Browser.  Otherwise, it is glitchy when restarted.
+            System.exit(0);
+        }
+    }
 
-            // Send the `event` to `gestureDetector`.
-            return gestureDetector.onTouchEvent(event);
-        });
+    // Process the results of a file browse.
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent returnedIntent) {
+        // Run the default commands.
+        super.onActivityResult(requestCode, resultCode, returnedIntent);
 
-        // Update `findOnPageCountTextView`.
-        mainWebView.setFindListener(new WebView.FindListener() {
-            // Get a handle for `findOnPageCountTextView`.
-            final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
+        // Run the commands that correlate to the specified request code.
+        switch (requestCode) {
+            case BROWSE_FILE_UPLOAD_REQUEST_CODE:
+                // File uploads only work on API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    // Pass the file to the WebView.
+                    fileChooserCallback.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, returnedIntent));
+                }
+                break;
 
-            @Override
-            public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
-                if ((isDoneCounting) && (numberOfMatches == 0)) {  // There are no matches.
-                    // Set `findOnPageCountTextView` to `0/0`.
-                    findOnPageCountTextView.setText(R.string.zero_of_zero);
-                } else if (isDoneCounting) {  // There are matches.
-                    // `activeMatchOrdinal` is zero-based.
-                    int activeMatch = activeMatchOrdinal + 1;
+            case BROWSE_OPEN_REQUEST_CODE:
+                // Don't do anything if the user pressed back from the file picker.
+                if (resultCode == Activity.RESULT_OK) {
+                    // Get a handle for the open dialog fragment.
+                    DialogFragment openDialogFragment = (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.open));
 
-                    // Build the match string.
-                    String matchString = activeMatch + "/" + numberOfMatches;
+                    // Only update the file name if the dialog still exists.
+                    if (openDialogFragment != null) {
+                        // Get a handle for the open dialog.
+                        Dialog openDialog = openDialogFragment.getDialog();
 
-                    // Set `findOnPageCountTextView`.
-                    findOnPageCountTextView.setText(matchString);
+                        // Remove the incorrect lint warning below that the dialog might be null.
+                        assert openDialog != null;
+
+                        // Get a handle for the file name edit text.
+                        EditText fileNameEditText = openDialog.findViewById(R.id.file_name_edittext);
+
+                        // Get the file name URI from the intent.
+                        Uri fileNameUri = returnedIntent.getData();
+
+                        // Get the file name string from the URI.
+                        String fileNameString = fileNameUri.toString();
+
+                        // Set the file name text.
+                        fileNameEditText.setText(fileNameString);
+
+                        // Move the cursor to the end of the file name edit text.
+                        fileNameEditText.setSelection(fileNameString.length());
+                    }
+                }
+                break;
+
+            case BROWSE_SAVE_WEBPAGE_REQUEST_CODE:
+                // Don't do anything if the user pressed back from the file picker.
+                if (resultCode == Activity.RESULT_OK) {
+                    // Get a handle for the save dialog fragment.
+                    DialogFragment saveWebpageDialogFragment = (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.save_dialog));
+
+                    // Only update the file name if the dialog still exists.
+                    if (saveWebpageDialogFragment != null) {
+                        // Get a handle for the save webpage dialog.
+                        Dialog saveWebpageDialog = saveWebpageDialogFragment.getDialog();
+
+                        // Remove the incorrect lint warning below that the dialog might be null.
+                        assert saveWebpageDialog != null;
+
+                        // Get a handle for the file name edit text.
+                        EditText fileNameEditText = saveWebpageDialog.findViewById(R.id.file_name_edittext);
+
+                        // Get the file name URI from the intent.
+                        Uri fileNameUri = returnedIntent.getData();
+
+                        // Get the file name string from the URI.
+                        String fileNameString = fileNameUri.toString();
+
+                        // Set the file name text.
+                        fileNameEditText.setText(fileNameString);
+
+                        // Move the cursor to the end of the file name edit text.
+                        fileNameEditText.setSelection(fileNameString.length());
+                    }
                 }
+                break;
+        }
+    }
+
+    private void loadUrlFromTextBox() {
+        // Get the text from urlTextBox and convert it to a string.  trim() removes white spaces from the beginning and end of the string.
+        String unformattedUrlString = urlEditText.getText().toString().trim();
+
+        // Initialize the formatted URL string.
+        String url = "";
+
+        // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
+        if (unformattedUrlString.startsWith("content://")) {  // This is a Content URL.
+            // Load the entire content URL.
+            url = unformattedUrlString;
+        } else if (Patterns.WEB_URL.matcher(unformattedUrlString).matches() || unformattedUrlString.startsWith("http://") || unformattedUrlString.startsWith("https://") ||
+                unformattedUrlString.startsWith("file://")) {  // This is a standard URL.
+            // Add `https://` at the beginning if there is no protocol.  Otherwise the app will segfault.
+            if (!unformattedUrlString.startsWith("http") && !unformattedUrlString.startsWith("file://") && !unformattedUrlString.startsWith("content://")) {
+                unformattedUrlString = "https://" + unformattedUrlString;
+            }
+
+            // Initialize `unformattedUrl`.
+            URL unformattedUrl = null;
+
+            // Convert `unformattedUrlString` to a `URL`, then to a `URI`, and then back to a `String`, which sanitizes the input and adds in any missing components.
+            try {
+                unformattedUrl = new URL(unformattedUrlString);
+            } catch (MalformedURLException e) {
+                e.printStackTrace();
             }
-        });
 
-        // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
-        findOnPageEditText.addTextChangedListener(new TextWatcher() {
-            @Override
-            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
-                // Do nothing.
-            }
+            // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if `.get` was called on a `null` value.
+            String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
+            String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
+            String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
+            String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
+            String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
 
-            @Override
-            public void onTextChanged(CharSequence s, int start, int before, int count) {
-                // Do nothing.
-            }
+            // Build the URI.
+            Uri.Builder uri = new Uri.Builder();
+            uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
 
-            @Override
-            public void afterTextChanged(Editable s) {
-                // Search for the text in `mainWebView`.
-                mainWebView.findAllAsync(findOnPageEditText.getText().toString());
+            // Decode the URI as a UTF-8 string in.
+            try {
+                url = URLDecoder.decode(uri.build().toString(), "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                // Do nothing.  The formatted URL string will remain blank.
             }
-        });
-
-        // Set the `check mark` button for the `findOnPageEditText` keyboard to close the soft keyboard.
-        findOnPageEditText.setOnKeyListener((v, keyCode, event) -> {
-            if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {  // The `enter` key was pressed.
-                // Hide the soft keyboard.  `0` indicates no additional flags.
-                inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
+        } else if (!unformattedUrlString.isEmpty()){  // This is not a URL, but rather a search string.
+            // Create an encoded URL String.
+            String encodedUrlString;
 
-                // Consume the event.
-                return true;
-            } else {  // A different key was pressed.
-                // Do not consume the event.
-                return false;
+            // Sanitize the search input.
+            try {
+                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                encodedUrlString = "";
             }
-        });
 
-        // Implement swipe to refresh
-        swipeRefreshLayout = findViewById(R.id.swipe_refreshlayout);
-        swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
-        swipeRefreshLayout.setOnRefreshListener(() -> mainWebView.reload());
+            // Add the base search URL.
+            url = searchURL + encodedUrlString;
+        }
 
-        // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
-        drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
-        drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
+        // Clear the focus from the URL edit text.  Otherwise, proximate typing in the box will retain the colorized formatting instead of being reset during refocus.
+        urlEditText.clearFocus();
 
-        // Listen for touches on the navigation menu.
-        final NavigationView navigationView = findViewById(R.id.navigationview);
-        navigationView.setNavigationItemSelectedListener(this);
+        // Make it so.
+        loadUrl(currentWebView, url);
+    }
 
-        // Get handles for `navigationMenu` and the back and forward menu items.  The menu is zero-based, so items 1, 2, and 3 are the second, third, and fourth entries in the menu.
-        final Menu navigationMenu = navigationView.getMenu();
-        final MenuItem navigationBackMenuItem = navigationMenu.getItem(1);
-        final MenuItem navigationForwardMenuItem = navigationMenu.getItem(2);
-        final MenuItem navigationHistoryMenuItem = navigationMenu.getItem(3);
+    private void loadUrl(NestedScrollWebView nestedScrollWebView, String url) {
+        // Sanitize the URL.
+        url = sanitizeUrl(url);
 
-        // Initialize the bookmarks database helper.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
-        // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
-        bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
+        // Apply the domain settings and load the URL.
+        applyDomainSettings(nestedScrollWebView, url, true, false, true);
+    }
 
-        // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
-        currentBookmarksFolder = "";
+    public void findPreviousOnPage(View view) {
+        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
+        currentWebView.findNext(false);
+    }
 
-        // Load the home folder, which is `""` in the database.
-        loadBookmarksFolder();
+    public void findNextOnPage(View view) {
+        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
+        currentWebView.findNext(true);
+    }
 
-        bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
-            // Convert the id from long to int to match the format of the bookmarks database.
-            int databaseID = (int) id;
+    public void closeFindOnPage(View view) {
+        // Get a handle for the views.
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
+        EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
 
-            // Get the bookmark `Cursor` for this ID and move it to the first row.
-            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
-            bookmarkCursor.moveToFirst();
+        // Delete the contents of `find_on_page_edittext`.
+        findOnPageEditText.setText(null);
 
-            // Act upon the bookmark according to the type.
-            if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
-                // Store the new folder name in `currentBookmarksFolder`.
-                currentBookmarksFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+        // Clear the highlighted phrases if the WebView is not null.
+        if (currentWebView != null) {
+            currentWebView.clearMatches();
+        }
 
-                // Load the new folder.
-                loadBookmarksFolder();
-            } else {  // The selected bookmark is not a folder.
-                // Load the bookmark URL.
-                loadUrl(bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
+        // Hide the find on page linear layout.
+        findOnPageLinearLayout.setVisibility(View.GONE);
 
-                // Close the bookmarks drawer.
-                drawerLayout.closeDrawer(GravityCompat.END);
-            }
+        // Show the toolbar.
+        toolbar.setVisibility(View.VISIBLE);
 
-            // Close the `Cursor`.
-            bookmarkCursor.close();
-        });
+        // Get a handle for the input method manager.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-        bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
-            // Convert the database ID from `long` to `int`.
-            int databaseId = (int) id;
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-            // Find out if the selected bookmark is a folder.
-            boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
+        // Hide the keyboard.
+        inputMethodManager.hideSoftInputFromWindow(toolbar.getWindowToken(), 0);
+    }
 
-            if (isFolder) {
-                // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
-                oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+    @Override
+    public void onApplyNewFontSize(DialogFragment dialogFragment) {
+        // Remove the incorrect lint warning below that the dialog fragment might be null.
+        assert dialogFragment != null;
 
-                // Show the edit bookmark folder `AlertDialog` and name the instance `@string/edit_folder`.
-                AppCompatDialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
-                editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
-            } else {
-                // Show the edit bookmark `AlertDialog` and name the instance `@string/edit_bookmark`.
-                AppCompatDialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
-                editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
-            }
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-            // Consume the event.
-            return true;
-        });
+        // Remove the incorrect lint warning below tha the dialog might be null.
+        assert dialog != null;
 
-        // The `DrawerListener` allows us to update the Navigation Menu.
-        drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
-            @Override
-            public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
-            }
+        // Get a handle for the font size edit text.
+        EditText fontSizeEditText = dialog.findViewById(R.id.font_size_edittext);
 
-            @Override
-            public void onDrawerOpened(@NonNull View drawerView) {
-            }
+        // Initialize the new font size variable with the current font size.
+        int newFontSize = currentWebView.getSettings().getTextZoom();
 
-            @Override
-            public void onDrawerClosed(@NonNull View drawerView) {
-            }
+        // Get the font size from the edit text.
+        try {
+            newFontSize = Integer.parseInt(fontSizeEditText.getText().toString());
+        } catch (Exception exception) {
+            // If the edit text does not contain a valid font size do nothing.
+        }
 
-            @Override
-            public void onDrawerStateChanged(int newState) {
-                if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // The drawer is opening or closing.
-                    // Update the `Back`, `Forward`, and `History` menu items.
-                    navigationBackMenuItem.setEnabled(mainWebView.canGoBack());
-                    navigationForwardMenuItem.setEnabled(mainWebView.canGoForward());
-                    navigationHistoryMenuItem.setEnabled((mainWebView.canGoBack() || mainWebView.canGoForward()));
+        // Apply the new font size.
+        currentWebView.getSettings().setTextZoom(newFontSize);
+    }
 
-                    // Hide the keyboard (if displayed) so we can see the navigation menu.  `0` indicates no additional flags.
-                    inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
+    @Override
+    public void onOpen(DialogFragment dialogFragment) {
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-                    // Clear the focus from `urlTextBox` if it has it.
-                    urlTextBox.clearFocus();
-                }
-            }
-        });
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
 
-        // drawerToggle creates the hamburger icon at the start of the AppBar.
-        drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
+        // Get handles for the views.
+        EditText fileNameEditText = dialog.findViewById(R.id.file_name_edittext);
+        CheckBox mhtCheckBox = dialog.findViewById(R.id.mht_checkbox);
 
-        mainWebView.setWebViewClient(new WebViewClient() {
-            // `shouldOverrideUrlLoading` makes this `WebView` the default handler for URLs inside the app, so that links are not kicked out to other apps.
-            // We have to use the deprecated `shouldOverrideUrlLoading` until API >= 24.
-            @SuppressWarnings("deprecation")
-            @Override
-            public boolean shouldOverrideUrlLoading(WebView view, String url) {
-                if (url.startsWith("mailto:")) {  // Load the email address in an external email program.
-                    // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
-                    Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
+        // Get the file path string.
+        String openFilePath = fileNameEditText.getText().toString();
 
-                    // Parse the url and set it as the data for the `Intent`.
-                    emailIntent.setData(Uri.parse(url));
+        // Apply the domain settings.  This resets the favorite icon and removes any domain settings.
+        applyDomainSettings(currentWebView, openFilePath, true, false, false);
 
-                    // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
-                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // Open the file according to the type.
+        if (mhtCheckBox.isChecked()) {  // Force opening of an MHT file.
+            try {
+                // Get the MHT file input stream.
+                InputStream mhtFileInputStream = getContentResolver().openInputStream(Uri.parse(openFilePath));
 
-                    // Make it so.
-                    startActivity(emailIntent);
+                // Create a temporary MHT file.
+                File temporaryMhtFile = File.createTempFile("temporary_mht_file", ".mht", getCacheDir());
 
-                    // Returning `true` indicates the application is handling the URL.
-                    return true;
-                } else if (url.startsWith("tel:")) {  // Load the phone number in the dialer.
-                    // `ACTION_DIAL` open the dialer and loads the phone number, but waits for the user to place the call.
-                    Intent dialIntent = new Intent(Intent.ACTION_DIAL);
+                // Get a file output stream for the temporary MHT file.
+                FileOutputStream temporaryMhtFileOutputStream = new FileOutputStream(temporaryMhtFile);
 
-                    // Add the phone number to the intent.
-                    dialIntent.setData(Uri.parse(url));
+                // Create a transfer byte array.
+                byte[] transferByteArray = new byte[1024];
 
-                    // `FLAG_ACTIVITY_NEW_TASK` opens the dialer in a new task instead as part of Privacy Browser.
-                    dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                // Create an integer to track the number of bytes read.
+                int bytesRead;
 
-                    // Make it so.
-                    startActivity(dialIntent);
+                // Copy the temporary MHT file input stream to the MHT output stream.
+                while ((bytesRead = mhtFileInputStream.read(transferByteArray)) > 0) {
+                    temporaryMhtFileOutputStream.write(transferByteArray, 0, bytesRead);
+                }
 
-                    // Returning `true` indicates the application is handling the URL.
-                    return true;
-                } else {  // Load the URL in Privacy Browser.
-                    // Apply the domain settings for the new URL.
-                    applyDomainSettings(url);
+                // Flush the temporary MHT file output stream.
+                temporaryMhtFileOutputStream.flush();
 
-                    // Returning `false` causes the current `WebView` to handle the URL and prevents it from adding redirects to the history list.
-                    return false;
-                }
-            }
+                // Close the streams.
+                temporaryMhtFileOutputStream.close();
+                mhtFileInputStream.close();
 
-            // Check requests against the block lists.  The deprecated `shouldInterceptRequest` must be used until minimum API >= 21.
-            @SuppressWarnings("deprecation")
-            @Override
-            public WebResourceResponse shouldInterceptRequest(WebView view, String url){
-                if (adBlockerEnabled) {  // Check the block lists.
-                    Log.i("BlockLists", "Begin check for " + url);
+                // Load the temporary MHT file.
+                currentWebView.loadUrl(temporaryMhtFile.toString());
+            } catch (Exception exception) {
+                // Display a snackbar.
+                Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception.toString(), Snackbar.LENGTH_INDEFINITE).show();
+            }
+        } else {  // Let the WebView handle opening of the file.
+            // Open the file.
+            currentWebView.loadUrl(openFilePath);
+        }
+    }
 
-                    Uri currentUri = Uri.parse(formattedUrlString);
-                    String currentDomain = currentUri.getHost();
+    @Override
+    public void onSaveWebpage(int saveType, @NonNull String originalUrlString, DialogFragment dialogFragment) {
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-                    Uri requestUri = Uri.parse(url);
-                    String requestDomain = requestUri.getHost();
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
 
-                    boolean thirdPartyRequest = !requestDomain.equals(currentDomain);
+        // Get a handle for the file name edit text.
+        EditText fileNameEditText = dialog.findViewById(R.id.file_name_edittext);
 
-                    WebResourceResponse emptyWebResourceResponse = new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
+        // Get the file path from the edit text.
+        String saveWebpageFilePath = fileNameEditText.getText().toString();
 
-                    for (String whiteListEntry : mainWhiteList) {
-                        if (url.contains(whiteListEntry)) {
-                            Log.i("BlockLists", "Request allowed by main white list: " + whiteListEntry + " | " + url);
+        //Save the webpage according to the save type.
+        switch (saveType) {
+            case SaveWebpageDialog.SAVE_URL:
+                // Get a handle for the dialog URL edit text.
+                EditText dialogUrlEditText = dialog.findViewById(R.id.url_edittext);
 
-                            // `Return null` loads the requested resource.
-                            return null;
-                        }
-                    }
+                // Define the save webpage URL.
+                String saveWebpageUrl;
 
-                    for (String[] whiteListEntry : multiEntryWhiteList) {
-                        if (whiteListEntry.length == 2) {  // There are two entries.
-                            if (url.contains(whiteListEntry[0]) && url.contains(whiteListEntry[1])) {
-                                Log.i("BlockLists", "Request allowed by multi entry white list:  " + whiteListEntry[0] + " , " + whiteListEntry[1] + " | " + url);
+                // Store the URL.
+                if (originalUrlString.startsWith("data:")) {
+                    // Save the original URL.
+                    saveWebpageUrl = originalUrlString;
+                } else {
+                    // Get the URL from the edit text, which may have been modified.
+                    saveWebpageUrl = dialogUrlEditText.getText().toString();
+                }
 
-                                // `Return null` loads the requested resource.
-                                return null;
-                            }
-                        } else {  // There are three entries.
-                            if (url.contains(whiteListEntry[0]) && url.contains(whiteListEntry[1]) && url.contains(whiteListEntry[2])) {
-                                Log.i("BlockLists", "Request allowed by multi entry white list:  " + whiteListEntry[0] + " , " + whiteListEntry[1] + " , " + whiteListEntry[2] + " | " + url);
+                // Save the URL.
+                new SaveUrl(this, this, saveWebpageFilePath, currentWebView.getSettings().getUserAgentString(), currentWebView.getAcceptFirstPartyCookies()).execute(saveWebpageUrl);
+                break;
 
-                                // `Return null` loads the requested resource.
-                                return null;
-                            }
-                        }
-                    }
+            case SaveWebpageDialog.SAVE_ARCHIVE:
+                try {
+                    // Create a temporary MHT file.
+                    File temporaryMhtFile = File.createTempFile("temporary_mht_file", ".mht", getCacheDir());
 
-                    for (String[] whiteListEntry : domainWhiteList) {
-                        if (requestDomain.endsWith(whiteListEntry[0]) && url.contains(whiteListEntry[1])) {
-                            Log.i("BlockLists", "Request allowed by domain white list: " + whiteListEntry[0] + " , " + whiteListEntry[1] + " | " + url);
+                    // Save the temporary MHT file.
+                    currentWebView.saveWebArchive(temporaryMhtFile.toString(), false, callbackValue -> {
+                        if (callbackValue != null) {  // The temporary MHT file was saved successfully.
+                            try {
+                                // Create a temporary MHT file input stream.
+                                FileInputStream temporaryMhtFileInputStream = new FileInputStream(temporaryMhtFile);
 
-                            // `Return null` loads the requested resource.
-                            return null;
-                        }
-                    }
+                                // Get an output stream for the save webpage file path.
+                                OutputStream mhtOutputStream = getContentResolver().openOutputStream(Uri.parse(saveWebpageFilePath));
 
-                    // Only check the third-party white lists if this is a third-party request.
-                    if (thirdPartyRequest) {
-                        for (String[] whiteListEntry : thirdPartyDomainWhiteList) {
-                            if (requestDomain.endsWith(whiteListEntry[0]) && url.contains(whiteListEntry[1])) {
-                                Log.i("BlockLists", "Request allowed by third-party domain white list: " + whiteListEntry[0] + " , " + whiteListEntry[1] + " | " + url);
+                                // Create a transfer byte array.
+                                byte[] transferByteArray = new byte[1024];
 
-                                // `Return null` loads the requested resource.
-                                return null;
-                            }
-                        }
-                    }
+                                // Create an integer to track the number of bytes read.
+                                int bytesRead;
 
-                    for (String blockListEntry : mainBlockList) {
-                        if (url.contains(blockListEntry)) {
-                            Log.i("BlockLists", "Request blocked by main block list: " + blockListEntry + " | " + url);
+                                // Copy the temporary MHT file input stream to the MHT output stream.
+                                while ((bytesRead = temporaryMhtFileInputStream.read(transferByteArray)) > 0) {
+                                    mhtOutputStream.write(transferByteArray, 0, bytesRead);
+                                }
 
-                            // Return an empty `WebResourceResponse`.
-                            return emptyWebResourceResponse;
+                                // Close the streams.
+                                mhtOutputStream.close();
+                                temporaryMhtFileInputStream.close();
+
+                                // Display a snackbar.
+                                Snackbar.make(currentWebView, getString(R.string.file_saved) + "  " + currentWebView.getCurrentUrl(), Snackbar.LENGTH_SHORT).show();
+                            } catch (Exception exception) {
+                                // Display a snackbar with the exception.
+                                Snackbar.make(currentWebView, getString(R.string.error_saving_file) + "  " + exception.toString(), Snackbar.LENGTH_INDEFINITE).show();
+                            } finally {
+                                // Delete the temporary MHT file.
+                                //noinspection ResultOfMethodCallIgnored
+                                temporaryMhtFile.delete();
+                            }
+                        } else {  // There was an unspecified error while saving the temporary MHT file.
+                            // Display an error snackbar.
+                            Snackbar.make(currentWebView, getString(R.string.error_saving_file), Snackbar.LENGTH_INDEFINITE).show();
                         }
-                    }
+                    });
+                } catch (IOException ioException) {
+                    // Display a snackbar with the IO exception.
+                    Snackbar.make(currentWebView, getString(R.string.error_saving_file) + "  " + ioException.toString(), Snackbar.LENGTH_INDEFINITE).show();
+                }
+                break;
 
-                    for (String blockListEntry : initialBlockList) {
-                        if (url.startsWith(blockListEntry)) {
-                            Log.i("BlockLists", "Request blocked by initial block list: " + blockListEntry + " | " + url);
+            case SaveWebpageDialog.SAVE_IMAGE:
+                // Save the webpage image.
+                new SaveWebpageImage(this, saveWebpageFilePath, currentWebView).execute();
+                break;
+        }
+    }
 
-                            // Return an empty `WebResourceResponse`.
-                            return emptyWebResourceResponse;
-                        }
-                    }
+    private void initializeApp() {
+        // Get a handle for the input method.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-                    for (String blockListEntry : finalBlockList) {
-                        if (url.endsWith(blockListEntry)) {
-                            Log.i("BlockLists", "Request blocked by final block list: " + blockListEntry + " | " + url);
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-                            // Return an empty `WebResourceResponse`.
-                            return emptyWebResourceResponse;
-                        }
-                    }
+        // Initialize the gray foreground color spans for highlighting the URLs.  The deprecated `getResources()` must be used until API >= 23.
+        initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
+        finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
 
-                    for (String[] blockListEntry : multiEntryBlockList) {
-                        if (blockListEntry.length == 2) {  // There are two entries.
-                            if (url.contains(blockListEntry[0]) && url.contains(blockListEntry[1])) {
-                                Log.i("BlockLists", "Request blocked by multi entry block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " | " + url);
+        // Get the current theme status.
+        int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 
-                                // Return an empty `WebResourceResponse`.
-                                return emptyWebResourceResponse;
-                            }
-                        } else {  // There are three entries.
-                            if (url.contains(blockListEntry[0]) && url.contains(blockListEntry[1]) && url.contains(blockListEntry[2])) {
-                                Log.i("BlockLists", "Request blocked by multi entry block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " , " + blockListEntry[2] + " | " + url);
+        // Set the red color span according to the theme.
+        if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+            redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
+        } else {
+            redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_900));
+        }
 
-                                // Return an empty `WebResourceResponse`.
-                                return emptyWebResourceResponse;
-                            }
-                        }
-                    }
+        // Remove the formatting from the URL edit text when the user is editing the text.
+        urlEditText.setOnFocusChangeListener((View v, boolean hasFocus) -> {
+            if (hasFocus) {  // The user is editing the URL text box.
+                // Remove the highlighting.
+                urlEditText.getText().removeSpan(redColorSpan);
+                urlEditText.getText().removeSpan(initialGrayColorSpan);
+                urlEditText.getText().removeSpan(finalGrayColorSpan);
+            } else {  // The user has stopped editing the URL text box.
+                // Move to the beginning of the string.
+                urlEditText.setSelection(0);
 
-                    for (String[] blockListEntry : multiEntryInitialBlockList) {
-                        if (url.startsWith(blockListEntry[0]) && url.contains(blockListEntry[1])) {
-                            Log.i("BlockLists", "Request blocked by multi entry initial block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " | " + url);
+                // Reapply the highlighting.
+                highlightUrlText();
+            }
+        });
 
-                            // Return an empty `WebResourceResponse`.
-                            return emptyWebResourceResponse;
-                        }
-                    }
+        // Set the go button on the keyboard to load the URL in `urlTextBox`.
+        urlEditText.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
+            // If the event is a key-down event on the `enter` button, load the URL.
+            if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
+                // Load the URL into the mainWebView and consume the event.
+                loadUrlFromTextBox();
 
-                    for (String[] blockListEntry : multiEntryFinalBlockList) {
-                        if (url.contains(blockListEntry[0]) && url.endsWith(blockListEntry[1])) {
-                            Log.i("BlockLists", "Request blocked by multi entry final block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " | " + url);
+                // If the enter key was pressed, consume the event.
+                return true;
+            } else {
+                // If any other key was pressed, do not consume the event.
+                return false;
+            }
+        });
 
-                            // Return an empty `WebResourceResponse`.
-                            return emptyWebResourceResponse;
-                        }
-                    }
+        // Create an Orbot status broadcast receiver.
+        orbotStatusBroadcastReceiver = new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                // Store the content of the status message in `orbotStatus`.
+                orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
 
-                    for (String[] blockListEntry : domainBlockList) {
-                        if (blockListEntry.length == 2) {  // There is one entry.
-                            if (requestDomain.endsWith(blockListEntry[0]) && url.contains(blockListEntry[1])) {
-                                Log.i("BlockLists", "Request blocked by domain block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " | " + url);
+                // If Privacy Browser is waiting on the proxy, load the website now that Orbot is connected.
+                if ((orbotStatus != null) && orbotStatus.equals("ON") && waitingForProxy) {
+                    // Reset the waiting for proxy status.
+                    waitingForProxy = false;
 
-                                // Return an empty `WebResourceResponse`.
-                                return emptyWebResourceResponse;
-                            }
-                        } else { // There are two entries.
-                            if (requestDomain.endsWith(blockListEntry[0]) && url.contains(blockListEntry[1]) && url.contains(blockListEntry[2])) {
-                                Log.i("BlockLists", "Request blocked by domain block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " , " + blockListEntry[2] + " | " + url);
+                    // Get a handle for the waiting for proxy dialog.
+                    DialogFragment waitingForProxyDialogFragment = (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.waiting_for_proxy_dialog));
 
-                                // Return an empty `WebResourceResponse`.
-                                return emptyWebResourceResponse;
-                            }
-                        }
+                    // Dismiss the waiting for proxy dialog if it is displayed.
+                    if (waitingForProxyDialogFragment != null) {
+                        waitingForProxyDialogFragment.dismiss();
                     }
 
-                    for (String[] blockListEntry : domainInitialBlockList) {
-                        if (requestDomain.endsWith(blockListEntry[0]) && url.startsWith(blockListEntry[1])) {
-                            Log.i("BlockLists", "Request blocked by domain initial block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " | " + url);
+                    // Reload existing URLs and load any URLs that are waiting for the proxy.
+                    for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                        // Get the WebView tab fragment.
+                        WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                            // Return an empty `WebResourceResponse`.
-                            return emptyWebResourceResponse;
-                        }
-                    }
+                        // Get the fragment view.
+                        View fragmentView = webViewTabFragment.getView();
 
-                    for (String[] blockListEntry : domainFinalBlockList) {
-                        if (requestDomain.endsWith(blockListEntry[0]) && url.endsWith(blockListEntry[2])) {
-                            Log.i("BlockLists", "Request blocked by domain final block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " | " + url);
+                        // Only process the WebViews if they exist.
+                        if (fragmentView != null) {
+                            // Get the nested scroll WebView from the tab fragment.
+                            NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-                            // Return an empty `WebResourceResponse`.
-                            return emptyWebResourceResponse;
-                        }
-                    }
+                            // Get the waiting for proxy URL string.
+                            String waitingForProxyUrlString = nestedScrollWebView.getWaitingForProxyUrlString();
 
-                    for (String[] blockListEntry : domainRegularExpressionBlockList) {
-                        if (requestDomain.endsWith(blockListEntry[0]) && Pattern.matches(blockListEntry[1], url)) {
-                            Log.i("BlockLists", "Request blocked by domain regular expression block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " | " + url);
+                            // Load the pending URL if it exists.
+                            if (!waitingForProxyUrlString.isEmpty()) {  // A URL is waiting to be loaded.
+                                // Load the URL.
+                                loadUrl(nestedScrollWebView, waitingForProxyUrlString);
 
-                            // Return an empty `WebResourceResponse`.
-                            return emptyWebResourceResponse;
+                                // Reset the waiting for proxy URL string.
+                                nestedScrollWebView.resetWaitingForProxyUrlString();
+                            } else {  // No URL is waiting to be loaded.
+                                // Reload the existing URL.
+                                nestedScrollWebView.reload();
+                            }
                         }
                     }
+                }
+            }
+        };
 
-                    // Only check the third-party block lists if this is a third-party request.
-                    if (thirdPartyRequest) {
-                        for (String blockListEntry : thirdPartyBlockList) {
-                            if (url.contains(blockListEntry)) {
-                                Log.i("BlockLists", "Request blocked by third-party block list: " + blockListEntry + " | " + url);
+        // Register the Orbot status broadcast receiver on `this` context.
+        this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
 
-                                // Return an empty `WebResourceResponse`.
-                                return emptyWebResourceResponse;
-                            }
-                        }
+        // Get handles for views that need to be modified.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+        FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
+        FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
+        FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
+        EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
 
-                        for (String blockListEntry : thirdPartyInitialBlockList) {
-                            if (url.startsWith(blockListEntry)) {
-                                Log.i("BlockLists", "Request blocked by third-party initial block list: " + blockListEntry + " | " + url);
+        // Update the web view pager every time a tab is modified.
+        webViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+            @Override
+            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+                // Do nothing.
+            }
 
-                                // Return an empty `WebResourceResponse`.
-                                return emptyWebResourceResponse;
-                            }
-                        }
+            @Override
+            public void onPageSelected(int position) {
+                // Close the find on page bar if it is open.
+                closeFindOnPage(null);
+
+                // Set the current WebView.
+                setCurrentWebView(position);
+
+                // Select the corresponding tab if it does not match the currently selected page.  This will happen if the page was scrolled by creating a new tab.
+                if (tabLayout.getSelectedTabPosition() != position) {
+                    // Wait until the new tab has been created.
+                    tabLayout.post(() -> {
+                        // Get a handle for the tab.
+                        TabLayout.Tab tab = tabLayout.getTabAt(position);
+
+                        // Assert that the tab is not null.
+                        assert tab != null;
+
+                        // Select the tab.
+                        tab.select();
+                    });
+                }
+            }
 
-                        for (String[] blockListEntry : thirdPartyMultiEntryBlockList) {
-                            switch (blockListEntry.length) {
-                                case 2:  // There are two entries.
-                                    if (url.contains(blockListEntry[0]) && url.contains(blockListEntry[1])) {
-                                        Log.i("BlockLists", "Request blocked by third-party multi-entry block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " | " + url);
+            @Override
+            public void onPageScrollStateChanged(int state) {
+                // Do nothing.
+            }
+        });
 
-                                        // Return an empty `WebResourceResponse`.
-                                        return emptyWebResourceResponse;
-                                    }
-                                    break;
+        // Display the View SSL Certificate dialog when the currently selected tab is reselected.
+        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
+            @Override
+            public void onTabSelected(TabLayout.Tab tab) {
+                // Select the same page in the view pager.
+                webViewPager.setCurrentItem(tab.getPosition());
+            }
 
-                                case 3:  // There are three entries.
-                                    if (url.contains(blockListEntry[0]) && url.contains(blockListEntry[1]) && url.contains(blockListEntry[2])) {
-                                        Log.i("BlockLists", "Request blocked by third-party multi-entry block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " , " + blockListEntry[2] +
-                                                " | " + url);
+            @Override
+            public void onTabUnselected(TabLayout.Tab tab) {
+                // Do nothing.
+            }
 
-                                        // Return an empty `WebResourceResponse`.
-                                        return emptyWebResourceResponse;
-                                    }
-                                    break;
+            @Override
+            public void onTabReselected(TabLayout.Tab tab) {
+                // Instantiate the View SSL Certificate dialog.
+                DialogFragment viewSslCertificateDialogFragment = ViewSslCertificateDialog.displayDialog(currentWebView.getWebViewFragmentId());
 
-                                case 4:  // There are four entries.
-                                    if (url.contains(blockListEntry[0]) && url.contains(blockListEntry[1]) && url.contains(blockListEntry[2]) && url.contains(blockListEntry[3])) {
-                                        Log.i("BlockLists", "Request blocked by third-party multi-entry block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " , " + blockListEntry[2] +
-                                                " , " + blockListEntry[3] + " | " + url);
+                // Display the View SSL Certificate dialog.
+                viewSslCertificateDialogFragment.show(getSupportFragmentManager(), getString(R.string.view_ssl_certificate));
+            }
+        });
 
-                                        // Return an empty `WebResourceResponse`.
-                                        return emptyWebResourceResponse;
-                                    }
-                                    break;
-                            }
-                        }
+        // Set the launch bookmarks activity FAB to launch the bookmarks activity.
+        launchBookmarksActivityFab.setOnClickListener(v -> {
+            // Get a copy of the favorite icon bitmap.
+            Bitmap favoriteIconBitmap = currentWebView.getFavoriteOrDefaultIcon();
 
-                        for (String[] blockListEntry : thirdPartyMultiEntryInitialBlockList) {
-                            if (url.startsWith(blockListEntry[0]) && url.contains(blockListEntry[1])) {
-                                Log.i("BlockLists", "Request blocked by third-party multi-entry initial block list");
+            // Create a favorite icon byte array output stream.
+            ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                                // Return an empty `WebResourceResponse`.
-                                return emptyWebResourceResponse;
-                            }
-                        }
+            // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 
-                        for (String[] blockListEntry : thirdPartyDomainBlockList) {
-                            if (blockListEntry.length == 2) {  // There is one entry.
-                                if (requestDomain.endsWith(blockListEntry[0]) && url.contains(blockListEntry[1])) {
-                                    Log.i("BlockLists", "Request blocked by third-party domain block list: " + blockListEntry[0] + " , " + blockListEntry[1] + " | " + url);
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
-                                    // Return an empty `WebResourceResponse`.
-                                    return emptyWebResourceResponse;
-                                }
-                            } else { // There are two entries.
-                                if (requestDomain.endsWith(blockListEntry[0]) && url.contains(blockListEntry[1]) && url.contains(blockListEntry[2])) {
-                                    Log.i("BlockLists", "Request blocked by third-party domain block list: " + blockListEntry[0] + " , " + blockListEntry[1] +  " , " + blockListEntry[2] + " | " +
-                                            url);
+            // Create an intent to launch the bookmarks activity.
+            Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
 
-                                    // Return an empty `WebResourceResponse`.
-                                    return emptyWebResourceResponse;
-                                }
-                            }
-                        }
+            // Add the extra information to the intent.
+            bookmarksIntent.putExtra("current_url", currentWebView.getUrl());
+            bookmarksIntent.putExtra("current_title", currentWebView.getTitle());
+            bookmarksIntent.putExtra("current_folder", currentBookmarksFolder);
+            bookmarksIntent.putExtra("favorite_icon_byte_array", favoriteIconByteArray);
 
-                        for (String blockListEntry : thirdPartyRegularExpressionBlockList) {
-                            if (Pattern.matches(blockListEntry, url)) {
-                                Log.i("BlockLists", "Request blocked by third-party regular expression block list: " + blockListEntry + " | " + url);
+            // Make it so.
+            startActivity(bookmarksIntent);
+        });
 
-                                // Return an empty `WebResourceResponse`.
-                                return emptyWebResourceResponse;
-                            }
-                        }
-                    }
+        // Set the create new bookmark folder FAB to display an alert dialog.
+        createBookmarkFolderFab.setOnClickListener(v -> {
+            // Create a create bookmark folder dialog.
+            DialogFragment createBookmarkFolderDialog = CreateBookmarkFolderDialog.createBookmarkFolder(currentWebView.getFavoriteOrDefaultIcon());
 
-                    for (String blockListEntry : regularExpressionBlockList) {
-                        if (Pattern.matches(blockListEntry, url)) {
-                            Log.i("BlockLists", "Request blocked by regular expression block list: " + blockListEntry + " | " + url);
+            // Show the create bookmark folder dialog.
+            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
+        });
 
-                            // Return an empty `WebResourceResponse`.
-                            return emptyWebResourceResponse;
-                        }
-                    }
+        // Set the create new bookmark FAB to display an alert dialog.
+        createBookmarkFab.setOnClickListener(view -> {
+            // Instantiate the create bookmark dialog.
+            DialogFragment createBookmarkDialog = CreateBookmarkDialog.createBookmark(currentWebView.getUrl(), currentWebView.getTitle(), currentWebView.getFavoriteOrDefaultIcon());
 
-                    Log.i("BlockLists", "End check for " + url);
+            // Display the create bookmark dialog.
+            createBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.create_bookmark));
+        });
 
-                    // `return null` loads the requested resource.
-                    return null;
-                } else {  // Ad blocking is disabled.
-                    // `return null` loads the requested resource.
-                    return null;
-                }
+        // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
+        findOnPageEditText.addTextChangedListener(new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+                // Do nothing.
             }
 
-            // Handle HTTP authentication requests.
             @Override
-            public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
-                // Store `handler` so it can be accessed from `onHttpAuthenticationCancel()` and `onHttpAuthenticationProceed()`.
-                httpAuthHandler = handler;
-
-                // Display the HTTP authentication dialog.
-                AppCompatDialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
-                httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                // Do nothing.
             }
 
-            // Update the URL in urlTextBox when the page starts to load.
             @Override
-            public void onPageStarted(WebView view, String url, Bitmap favicon) {
-                // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
-                if (nightMode) {
-                    mainWebView.setVisibility(View.INVISIBLE);
+            public void afterTextChanged(Editable s) {
+                // Search for the text in the WebView if it is not null.  Sometimes on resume after a period of non-use the WebView will be null.
+                if (currentWebView != null) {
+                    currentWebView.findAllAsync(findOnPageEditText.getText().toString());
                 }
+            }
+        });
 
-                // Hide the keyboard.  `0` indicates no additional flags.
-                inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
+        // Set the `check mark` button for the `findOnPageEditText` keyboard to close the soft keyboard.
+        findOnPageEditText.setOnKeyListener((v, keyCode, event) -> {
+            if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {  // The `enter` key was pressed.
+                // Hide the soft keyboard.
+                inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
 
-                // Check to see if we are waiting on Orbot.
-                if (!waitingForOrbot) {  // We are not waiting on Orbot, so we need to process the URL.
-                    // We need to update `formattedUrlString` at the beginning of the load, so that if the user toggles JavaScript during the load the new website is reloaded.
-                    formattedUrlString = url;
+                // Consume the event.
+                return true;
+            } else {  // A different key was pressed.
+                // Do not consume the event.
+                return false;
+            }
+        });
 
-                    // Display the formatted URL text.
-                    urlTextBox.setText(formattedUrlString);
+        // Implement swipe to refresh.
+        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
 
-                    // Apply text highlighting to `urlTextBox`.
-                    highlightUrlText();
+        // Store the default progress view offsets for use later in `initializeWebView()`.
+        defaultProgressViewStartOffset = swipeRefreshLayout.getProgressViewStartOffset();
+        defaultProgressViewEndOffset = swipeRefreshLayout.getProgressViewEndOffset();
 
-                    // Apply any custom domain settings if the URL was loaded by navigating history.
-                    if (navigatingHistory) {
-                        applyDomainSettings(url);
-                    }
+        // Set the refresh color scheme according to the theme.
+        if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+            swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
+        } else {
+            swipeRefreshLayout.setColorSchemeResources(R.color.violet_500);
+        }
 
-                    // Set `urlIsLoading` to `true`, so that redirects while loading do not trigger changes in the user agent, which forces another reload of the existing page.
-                    urlIsLoading = true;
-                }
-            }
+        // Initialize a color background typed value.
+        TypedValue colorBackgroundTypedValue = new TypedValue();
 
-            // It is necessary to update `formattedUrlString` and `urlTextBox` after the page finishes loading because the final URL can change during load.
-            @Override
-            public void onPageFinished(WebView view, String url) {
-                // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
-                urlIsLoading = false;
+        // Get the color background from the theme.
+        getTheme().resolveAttribute(android.R.attr.colorBackground, colorBackgroundTypedValue, true);
 
-                // Clear the cache and history if Incognito Mode is enabled.
-                if (incognitoModeEnabled) {
-                    // Clear the cache.  `true` includes disk files.
-                    mainWebView.clearCache(true);
+        // Get the color background int from the typed value.
+        int colorBackgroundInt = colorBackgroundTypedValue.data;
 
-                    // Clear the back/forward history.
-                    mainWebView.clearHistory();
+        // Set the swipe refresh background color.
+        swipeRefreshLayout.setProgressBackgroundColorSchemeColor(colorBackgroundInt);
 
-                    // Manually delete cache folders.
-                    try {
-                        // Delete the main `cache` folder.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+        // The drawer titles identify the drawer layouts in accessibility mode.
+        drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
+        drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
 
-                        // Delete the `app_webview` folder, which contains an additional `WebView` cache.  See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
-                    } catch (IOException e) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+        // Initialize the bookmarks database helper.  The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
+        bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
 
-                // Update `urlTextBox` and apply domain settings if not waiting on Orbot.
-                if (!waitingForOrbot) {
-                    // Check to see if `WebView` has set `url` to be `about:blank`.
-                    if (url.equals("about:blank")) {  // `WebView` is blank, so `formattedUrlString` should be `""` and `urlTextBox` should display a hint.
-                        // Set `formattedUrlString` to `""`.
-                        formattedUrlString = "";
+        // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
+        currentBookmarksFolder = "";
 
-                        urlTextBox.setText(formattedUrlString);
+        // Load the home folder, which is `""` in the database.
+        loadBookmarksFolder();
 
-                        // Request focus for `urlTextBox`.
-                        urlTextBox.requestFocus();
+        bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
+            // Convert the id from long to int to match the format of the bookmarks database.
+            int databaseId = (int) id;
 
-                        // Display the keyboard.
-                        inputMethodManager.showSoftInput(urlTextBox, 0);
+            // Get the bookmark cursor for this ID.
+            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseId);
 
-                        // Apply the domain settings.  This clears any settings from the previous domain.
-                        applyDomainSettings(formattedUrlString);
-                    } else {  // `WebView` has loaded a webpage.
-                        // Set `formattedUrlString`.
-                        formattedUrlString = url;
+            // Move the bookmark cursor to the first row.
+            bookmarkCursor.moveToFirst();
 
-                        // Only update `urlTextBox` if the user is not typing in it.
-                        if (!urlTextBox.hasFocus()) {
-                            // Display the formatted URL text.
-                            urlTextBox.setText(formattedUrlString);
+            // Act upon the bookmark according to the type.
+            if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
+                // Store the new folder name in `currentBookmarksFolder`.
+                currentBookmarksFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
-                            // Apply text highlighting to `urlTextBox`.
-                            highlightUrlText();
-                        }
-                    }
+                // Load the new folder.
+                loadBookmarksFolder();
+            } else {  // The selected bookmark is not a folder.
+                // Load the bookmark URL.
+                loadUrl(currentWebView, bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
 
-                    // Store the SSL certificate so it can be accessed from `ViewSslCertificateDialog` and `PinnedSslCertificateMismatchDialog`.
-                    sslCertificate = mainWebView.getCertificate();
-
-                    // Check the current website SSL certificate against the pinned SSL certificate if there is a pinned SSL certificate the user has not chosen to ignore it for this session.
-                    if (pinnedDomainSslCertificate && !ignorePinnedSslCertificate) {
-                        // Initialize the current SSL certificate variables.
-                        String currentWebsiteIssuedToCName = "";
-                        String currentWebsiteIssuedToOName = "";
-                        String currentWebsiteIssuedToUName = "";
-                        String currentWebsiteIssuedByCName = "";
-                        String currentWebsiteIssuedByOName = "";
-                        String currentWebsiteIssuedByUName = "";
-                        Date currentWebsiteSslStartDate = null;
-                        Date currentWebsiteSslEndDate = null;
-
-
-                        // Extract the individual pieces of information from the current website SSL certificate if it is not null.
-                        if (sslCertificate != null) {
-                            currentWebsiteIssuedToCName = sslCertificate.getIssuedTo().getCName();
-                            currentWebsiteIssuedToOName = sslCertificate.getIssuedTo().getOName();
-                            currentWebsiteIssuedToUName = sslCertificate.getIssuedTo().getUName();
-                            currentWebsiteIssuedByCName = sslCertificate.getIssuedBy().getCName();
-                            currentWebsiteIssuedByOName = sslCertificate.getIssuedBy().getOName();
-                            currentWebsiteIssuedByUName = sslCertificate.getIssuedBy().getUName();
-                            currentWebsiteSslStartDate = sslCertificate.getValidNotBeforeDate();
-                            currentWebsiteSslEndDate = sslCertificate.getValidNotAfterDate();
-                        }
+                // Close the bookmarks drawer.
+                drawerLayout.closeDrawer(GravityCompat.END);
+            }
 
-                        // Initialize `String` variables to store the SSL certificate dates.  `Strings` are needed to compare the values below, which doesn't work with `Dates` if they are `null`.
-                        String currentWebsiteSslStartDateString = "";
-                        String currentWebsiteSslEndDateString = "";
-                        String pinnedDomainSslStartDateString = "";
-                        String pinnedDomainSslEndDateString = "";
+            // Close the `Cursor`.
+            bookmarkCursor.close();
+        });
 
-                        // Convert the `Dates` to `Strings` if they are not `null`.
-                        if (currentWebsiteSslStartDate != null) {
-                            currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString();
-                        }
+        bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
+            // Convert the database ID from `long` to `int`.
+            int databaseId = (int) id;
 
-                        if (currentWebsiteSslEndDate != null) {
-                            currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString();
-                        }
+            // Find out if the selected bookmark is a folder.
+            boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
 
-                        if (pinnedDomainSslStartDate != null) {
-                            pinnedDomainSslStartDateString = pinnedDomainSslStartDate.toString();
-                        }
+            if (isFolder) {
+                // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
+                oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
-                        if (pinnedDomainSslEndDate != null) {
-                            pinnedDomainSslEndDateString = pinnedDomainSslEndDate.toString();
-                        }
+                // Instantiate the edit folder bookmark dialog.
+                DialogFragment editBookmarkFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
 
-                        // Check to see if the pinned SSL certificate matches the current website certificate.
-                        if (!currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) || !currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) ||
-                                !currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) || !currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) ||
-                                !currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) || !currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) ||
-                                !currentWebsiteSslStartDateString.equals(pinnedDomainSslStartDateString) || !currentWebsiteSslEndDateString.equals(pinnedDomainSslEndDateString)) {
-                                // The pinned SSL certificate doesn't match the current domain certificate.
-                            //Display the pinned SSL certificate mismatch `AlertDialog`.
-                            AppCompatDialogFragment pinnedSslCertificateMismatchDialogFragment = new PinnedSslCertificateMismatchDialog();
-                            pinnedSslCertificateMismatchDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_mismatch));
-                        }
-                    }
-                }
+                // Show the edit folder bookmark dialog.
+                editBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.edit_folder));
+            } else {
+                // Get the bookmark cursor for this ID.
+                Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseId);
+
+                // Move the bookmark cursor to the first row.
+                bookmarkCursor.moveToFirst();
+
+                // Load the bookmark in a new tab but do not switch to the tab or close the drawer.
+                addNewTab(bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)), false);
             }
 
-            // Handle SSL Certificate errors.
+            // Consume the event.
+            return true;
+        });
+
+        // The drawer listener is used to update the navigation menu.
+        drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
             @Override
-            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
-                // Get the current website SSL certificate.
-                SslCertificate currentWebsiteSslCertificate = error.getCertificate();
+            public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
+            }
 
-                // Extract the individual pieces of information from the current website SSL certificate.
-                String currentWebsiteIssuedToCName = currentWebsiteSslCertificate.getIssuedTo().getCName();
-                String currentWebsiteIssuedToOName = currentWebsiteSslCertificate.getIssuedTo().getOName();
-                String currentWebsiteIssuedToUName = currentWebsiteSslCertificate.getIssuedTo().getUName();
-                String currentWebsiteIssuedByCName = currentWebsiteSslCertificate.getIssuedBy().getCName();
-                String currentWebsiteIssuedByOName = currentWebsiteSslCertificate.getIssuedBy().getOName();
-                String currentWebsiteIssuedByUName = currentWebsiteSslCertificate.getIssuedBy().getUName();
-                Date currentWebsiteSslStartDate = currentWebsiteSslCertificate.getValidNotBeforeDate();
-                Date currentWebsiteSslEndDate = currentWebsiteSslCertificate.getValidNotAfterDate();
+            @Override
+            public void onDrawerOpened(@NonNull View drawerView) {
+            }
 
-                // Proceed to the website if the current SSL website certificate matches the pinned domain certificate.
-                if (pinnedDomainSslCertificate &&
-                        currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) && currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) &&
-                        currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) && currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) &&
-                        currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) && currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) &&
-                        currentWebsiteSslStartDate.equals(pinnedDomainSslStartDate) && currentWebsiteSslEndDate.equals(pinnedDomainSslEndDate)) {
-                        // An SSL certificate is pinned and matches the current domain certificate.
-                    // Proceed to the website without displaying an error.
-                    handler.proceed();
-                } else {  // Either there isn't a pinned SSL certificate or it doesn't match the current website certificate.
-                    // Store `handler` so it can be accesses from `onSslErrorCancel()` and `onSslErrorProceed()`.
-                    sslErrorHandler = handler;
+            @Override
+            public void onDrawerClosed(@NonNull View drawerView) {
+                // Reset the drawer icon when the drawer is closed.  Otherwise, it is an arrow if the drawer is open when the app is restarted.
+                actionBarDrawerToggle.syncState();
+            }
 
-                    // Display the SSL error `AlertDialog`.
-                    AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
-                    sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
+            @Override
+            public void onDrawerStateChanged(int newState) {
+                if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // A drawer is opening or closing.
+                    // Update the navigation menu items if the WebView is not null.
+                    if (currentWebView != null) {
+                        navigationBackMenuItem.setEnabled(currentWebView.canGoBack());
+                        navigationForwardMenuItem.setEnabled(currentWebView.canGoForward());
+                        navigationHistoryMenuItem.setEnabled((currentWebView.canGoBack() || currentWebView.canGoForward()));
+                        navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                        // Hide the keyboard (if displayed).
+                        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+                    }
+
+                    // Clear the focus from from the URL text box and the WebView.  This removes any text selection markers and context menus, which otherwise draw above the open drawers.
+                    urlEditText.clearFocus();
+                    currentWebView.clearFocus();
                 }
             }
         });
 
-        // Get a handle for the progress bar.
-        final ProgressBar progressBar = findViewById(R.id.progress_bar);
+        // Replace the header that `WebView` creates for `X-Requested-With` with a null value.  The default value is the application ID (com.stoutner.privacybrowser.standard).
+        customHeaders.put("X-Requested-With", "");
 
-        mainWebView.setWebChromeClient(new WebChromeClient() {
-            // Update the progress bar when a page is loading.
-            @Override
-            public void onProgressChanged(WebView view, int progress) {
-                // Inject the night mode CSS if night mode is enabled.
-                if (nightMode) {
-                    // `background-color: #212121` sets the background to be dark gray.  `color: #BDBDBD` sets the text color to be light gray.  `box-shadow: none` removes a lower underline on links
-                    // used by WordPress.  `text-decoration: none` removes all text underlines.  `text-shadow: none` removes text shadows, which usually have a hard coded color.
-                    // `border: none` removes all borders, which can also be used to underline text.
-                    // `a {color: #1565C0}` sets links to be a dark blue.  `!important` takes precedent over any existing sub-settings.
-                    mainWebView.evaluateJavascript("(function() {var parent = document.getElementsByTagName('head').item(0); var style = document.createElement('style'); style.type = 'text/css'; " +
-                            "style.innerHTML = '* {background-color: #212121 !important; color: #BDBDBD !important; box-shadow: none !important; text-decoration: none !important;" +
-                            "text-shadow: none !important; border: none !important;} a {color: #1565C0 !important;}'; parent.appendChild(style)})()", value -> {
-                                // Initialize a `Handler` to display `mainWebView`.
-                                Handler displayWebViewHandler = new Handler();
-
-                                // Setup a `Runnable` to display `mainWebView` after a delay to allow the CSS to be applied.
-                                Runnable displayWebViewRunnable = () -> {
-                                    // Only display `mainWebView` if the progress bar is one.  This prevents the display of the `WebView` while it is still loading.
-                                    if (progressBar.getVisibility() == View.GONE) {
-                                        mainWebView.setVisibility(View.VISIBLE);
-                                    }
-                                };
+        // Inflate a bare WebView to get the default user agent.  It is not used to render content on the screen.
+        @SuppressLint("InflateParams") View webViewLayout = getLayoutInflater().inflate(R.layout.bare_webview, null, false);
 
-                                // Use `displayWebViewHandler` to delay the displaying of `mainWebView` for 500 milliseconds.
-                                displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
-                            });
-                }
+        // Get a handle for the WebView.
+        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
 
-                // Update the progress bar.
-                progressBar.setProgress(progress);
+        // Store the default user agent.
+        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
 
-                // Set the visibility of the progress bar.
-                if (progress < 100) {
-                    // Show the progress bar.
-                    progressBar.setVisibility(View.VISIBLE);
-                } else {
-                    // Hide the progress bar.
-                    progressBar.setVisibility(View.GONE);
+        // Destroy the bare WebView.
+        bareWebView.destroy();
+    }
 
-                    // Display `mainWebView` if night mode is disabled.
-                    // Because of a race condition between `applyDomainSettings` and `onPageStarted`, when night mode is set by domain settings the `WebView` may be hidden even if night mode is not
-                    // currently enabled.
-                    if (!nightMode) {
-                        mainWebView.setVisibility(View.VISIBLE);
-                    }
+    private void applyAppSettings() {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    //Stop the `SwipeToRefresh` indicator if it is running
-                    swipeRefreshLayout.setRefreshing(false);
-                }
-            }
+        // Store the values from the shared preferences in variables.
+        incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
+        boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
+        sanitizeGoogleAnalytics = sharedPreferences.getBoolean("google_analytics", true);
+        sanitizeFacebookClickIds = sharedPreferences.getBoolean("facebook_click_ids", true);
+        sanitizeTwitterAmpRedirects = sharedPreferences.getBoolean("twitter_amp_redirects", true);
+        proxyMode = sharedPreferences.getString("proxy", getString(R.string.proxy_default_value));
+        fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
+        hideAppBar = sharedPreferences.getBoolean("hide_app_bar", true);
+        scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
 
-            // Set the favorite icon when it changes.
-            @Override
-            public void onReceivedIcon(WebView view, Bitmap icon) {
-                // Only update the favorite icon if the website has finished loading.
-                if (progressBar.getVisibility() == View.GONE) {
-                    // Save a copy of the favorite icon.
-                    favoriteIconBitmap = icon;
+        // Apply the saved proxy mode if the app has been restarted.
+        if (savedProxyMode != null) {
+            // Apply the saved proxy mode.
+            proxyMode = savedProxyMode;
 
-                    // Place the favorite icon in the appBar.
-                    favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
-                }
-            }
+            // Reset the saved proxy mode.
+            savedProxyMode = null;
+        }
 
-            // Save a copy of the title when it changes.
-            @Override
-            public void onReceivedTitle(WebView view, String title) {
-                // Save a copy of the title.
-                webViewTitle = title;
-            }
+        // Get the search string.
+        String searchString = sharedPreferences.getString("search", getString(R.string.search_default_value));
 
-            // Enter full screen video
-            @Override
-            public void onShowCustomView(View view, CustomViewCallback callback) {
-                // Pause the ad if this is the free flavor.
-                if (BuildConfig.FLAVOR.contentEquals("free")) {
-                    BannerAd.pauseAd(adView);
-                }
+        // Set the search string.
+        if (searchString.equals("Custom URL")) {  // A custom search string is used.
+            searchURL = sharedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value));
+        } else {  // A custom search string is not used.
+            searchURL = searchString;
+        }
+
+        // Apply the proxy.
+        applyProxy(false);
 
-                // Remove the translucent overlays.
-                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+        // Set Do Not Track status.
+        if (doNotTrackEnabled) {
+            customHeaders.put("DNT", "1");
+        } else {
+            customHeaders.remove("DNT");
+        }
+
+        // Get the current layout parameters.  Using coordinator layout parameters allows the `setBehavior()` command and using app bar layout parameters allows the `setScrollFlags()` command.
+        CoordinatorLayout.LayoutParams swipeRefreshLayoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
+        AppBarLayout.LayoutParams toolbarLayoutParams = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
+        AppBarLayout.LayoutParams findOnPageLayoutParams = (AppBarLayout.LayoutParams) findOnPageLinearLayout.getLayoutParams();
+        AppBarLayout.LayoutParams tabsLayoutParams = (AppBarLayout.LayoutParams) tabsLinearLayout.getLayoutParams();
+
+        // Add the scrolling behavior to the layout parameters.
+        if (scrollAppBar) {
+            // Enable scrolling of the app bar.
+            swipeRefreshLayoutParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());
+            toolbarLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+            findOnPageLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+            tabsLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+        } else {
+            // Disable scrolling of the app bar.
+            swipeRefreshLayoutParams.setBehavior(null);
+            toolbarLayoutParams.setScrollFlags(0);
+            findOnPageLayoutParams.setScrollFlags(0);
+            tabsLayoutParams.setScrollFlags(0);
+
+            // Expand the app bar if it is currently collapsed.
+            appBarLayout.setExpanded(true);
+        }
 
-                // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
-                drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
+        // Apply the modified layout parameters.
+        swipeRefreshLayout.setLayoutParams(swipeRefreshLayoutParams);
+        toolbar.setLayoutParams(toolbarLayoutParams);
+        findOnPageLinearLayout.setLayoutParams(findOnPageLayoutParams);
+        tabsLinearLayout.setLayoutParams(tabsLayoutParams);
 
-                /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-                 * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-                 * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically rehides them after they are shown.
-                 */
-                rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+        // Set the app bar scrolling for each WebView.
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                // Set `rootCoordinatorLayout` to fill the entire screen.
-                rootCoordinatorLayout.setFitsSystemWindows(false);
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-                // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
-                fullScreenVideoFrameLayout.addView(view);
-                fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
+            // Only modify the WebViews if they exist.
+            if (fragmentView != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+
+                // Set the app bar scrolling.
+                nestedScrollWebView.setNestedScrollingEnabled(scrollAppBar);
             }
+        }
 
-            // Exit full screen video
-            public void onHideCustomView() {
-                // Hide `fullScreenVideoFrameLayout`.
-                fullScreenVideoFrameLayout.removeAllViews();
-                fullScreenVideoFrameLayout.setVisibility(View.GONE);
+        // Update the full screen browsing mode settings.
+        if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
+            // Update the visibility of the app bar, which might have changed in the settings.
+            if (hideAppBar) {
+                // Hide the tab linear layout.
+                tabsLinearLayout.setVisibility(View.GONE);
 
-                // Add the translucent status flag.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
-                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                // Hide the action bar.
+                actionBar.hide();
+            } else {
+                // Show the tab linear layout.
+                tabsLinearLayout.setVisibility(View.VISIBLE);
 
-                // Set `rootCoordinatorLayout` to fit inside the status and navigation bars.  This also clears the `SYSTEM_UI` flags.
-                rootCoordinatorLayout.setFitsSystemWindows(true);
+                // Show the action bar.
+                actionBar.show();
+            }
 
-                // Show the ad if this is the free flavor.
-                if (BuildConfig.FLAVOR.contentEquals("free")) {
-                    // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
-                    BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
+            // Hide the banner ad in the free flavor.
+            if (BuildConfig.FLAVOR.contentEquals("free")) {
+                // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+                View adView = findViewById(R.id.adview);
 
-                    // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
-                    adView = findViewById(R.id.adview);
-                }
+                // Hide the banner ad.
+                AdHelper.hideAd(adView);
             }
-        });
 
-        // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
-        registerForContextMenu(mainWebView);
+            /* Hide the system bars.
+             * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+             * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+             */
+            rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                    View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+        } else {  // Privacy Browser is not in full screen browsing mode.
+            // Reset the full screen tracker, which could be true if Privacy Browser was in full screen mode before entering settings and full screen browsing was disabled.
+            inFullScreenBrowsingMode = false;
+
+            // Show the tab linear layout.
+            tabsLinearLayout.setVisibility(View.VISIBLE);
 
-        // Allow the downloading of files.
-        mainWebView.setDownloadListener((String url, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
-            // Show the `DownloadFileDialog` `AlertDialog` and name this instance `@string/download`.
-            AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
-            downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-        });
+            // Show the action bar.
+            actionBar.show();
 
-        // Allow pinch to zoom.
-        mainWebView.getSettings().setBuiltInZoomControls(true);
+            // Show the banner ad in the free flavor.
+            if (BuildConfig.FLAVOR.contentEquals("free")) {
+                // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+                View adView = findViewById(R.id.adview);
 
-        // Hide zoom controls.
-        mainWebView.getSettings().setDisplayZoomControls(false);
+                // Initialize the ads.  If this isn't the first run, `loadAd()` will be automatically called instead.
+                // `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
+                AdHelper.initializeAds(adView, getApplicationContext(), this, getSupportFragmentManager(), getString(R.string.ad_unit_id));
+            }
+
+            // Remove the `SYSTEM_UI` flags from the root frame layout.
+            rootFrameLayout.setSystemUiVisibility(0);
+        }
+    }
 
-        // Set `mainWebView` to use a wide viewport.  Otherwise, some web pages will be scrunched and some content will render outside the screen.
-        mainWebView.getSettings().setUseWideViewPort(true);
+    @Override
+    public void navigateHistory(@NonNull String url, int steps) {
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, url, false, false, false);
 
-        // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
-        mainWebView.getSettings().setLoadWithOverviewMode(true);
+        // Load the history entry.
+        currentWebView.goBackOrForward(steps);
+    }
 
-        // Explicitly disable geolocation.
-        mainWebView.getSettings().setGeolocationEnabled(false);
+    @Override
+    public void pinnedErrorGoBack() {
+        // Get the current web back forward list.
+        WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-        // Initialize cookieManager.
-        cookieManager = CookieManager.getInstance();
+        // Get the previous entry URL.
+        String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
 
-        // Replace the header that `WebView` creates for `X-Requested-With` with a null value.  The default value is the application ID (com.stoutner.privacybrowser.standard).
-        customHeaders.put("X-Requested-With", "");
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, previousUrl, false, false, false);
 
-        // Initialize the default preference values the first time the program is run.  `this` is the context.  `false` keeps this command from resetting any current preferences back to default.
-        PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
+        // Go back.
+        currentWebView.goBack();
+    }
+
+    // `reloadWebsite` is used if returning from the Domains activity.  Otherwise JavaScript might not function correctly if it is newly enabled.
+    @SuppressLint("SetJavaScriptEnabled")
+    private void applyDomainSettings(NestedScrollWebView nestedScrollWebView, String url, boolean resetTab, boolean reloadWebsite, boolean loadUrl) {
+        // Store the current URL.
+        nestedScrollWebView.setCurrentUrl(url);
 
-        // Get the intent that started the app.
-        final Intent launchingIntent = getIntent();
+        // Parse the URL into a URI.
+        Uri uri = Uri.parse(url);
 
-        // Extract the launching intent data as `launchingIntentUriData`.
-        final Uri launchingIntentUriData = launchingIntent.getData();
+        // Extract the domain from `uri`.
+        String newHostName = uri.getHost();
 
-        // Convert the launching intent URI data (if it exists) to a string and store it in `formattedUrlString`.
-        if (launchingIntentUriData != null) {
-            formattedUrlString = launchingIntentUriData.toString();
+        // Strings don't like to be null.
+        if (newHostName == null) {
+            newHostName = "";
         }
 
-        // Get a handle for the `Runtime`.
-        privacyBrowserRuntime = Runtime.getRuntime();
+        // Apply the domain settings if a new domain is being loaded or if the new domain is blank.  This allows the user to set temporary settings for JavaScript, cookies, DOM storage, etc.
+        if (!nestedScrollWebView.getCurrentDomainName().equals(newHostName) || newHostName.equals("")) {
+            // Set the new host name as the current domain name.
+            nestedScrollWebView.setCurrentDomainName(newHostName);
 
-        // Store the application's private data directory.
-        privateDataDirectoryString = getApplicationInfo().dataDir;
-        // `dataDir` will vary, but will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
+            // Reset the ignoring of pinned domain information.
+            nestedScrollWebView.setIgnorePinnedDomainInformation(false);
 
-        // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
-        inFullScreenBrowsingMode = false;
+            // Clear any pinned SSL certificate or IP addresses.
+            nestedScrollWebView.clearPinnedSslCertificate();
+            nestedScrollWebView.clearPinnedIpAddresses();
 
-        // Initialize AdView for the free flavor.
-        adView = findViewById(R.id.adview);
+            // Reset the favorite icon if specified.
+            if (resetTab) {
+                // Initialize the favorite icon.
+                nestedScrollWebView.initializeFavoriteIcon();
 
-        // Initialize the privacy settings variables.
-        javaScriptEnabled = false;
-        firstPartyCookiesEnabled = false;
-        thirdPartyCookiesEnabled = false;
-        domStorageEnabled = false;
-        saveFormDataEnabled = false;
-        nightMode = false;
+                // Get the current page position.
+                int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-        // Initialize `webViewTitle`.
-        webViewTitle = getString(R.string.no_title);
+                // Get the corresponding tab.
+                TabLayout.Tab tab = tabLayout.getTabAt(currentPagePosition);
 
-        // Initialize `favoriteIconBitmap`.  `ContextCompat` must be used until API >= 21.
-        Drawable favoriteIconDrawable = ContextCompat.getDrawable(getApplicationContext(), R.drawable.world);
-        BitmapDrawable favoriteIconBitmapDrawable = (BitmapDrawable) favoriteIconDrawable;
-        assert favoriteIconBitmapDrawable != null;
-        favoriteIconDefaultBitmap = favoriteIconBitmapDrawable.getBitmap();
+                // Update the tab if it isn't null, which sometimes happens when restarting from the background.
+                if (tab != null) {
+                    // Get the tab custom view.
+                    View tabCustomView = tab.getCustomView();
 
-        // If the favorite icon is null, load the default.
-        if (favoriteIconBitmap == null) {
-            favoriteIconBitmap = favoriteIconDefaultBitmap;
-        }
+                    // Remove the warning below that the tab custom view might be null.
+                    assert tabCustomView != null;
 
-        // Apply the app settings from the shared preferences.
-        applyAppSettings();
+                    // Get the tab views.
+                    ImageView tabFavoriteIconImageView = tabCustomView.findViewById(R.id.favorite_icon_imageview);
+                    TextView tabTitleTextView = tabCustomView.findViewById(R.id.title_textview);
 
-        // Load `formattedUrlString` if we are not waiting for Orbot to connect.
-        if (!waitingForOrbot) {
-            loadUrl(formattedUrlString);
-        }
-    }
+                    // Set the default favorite icon as the favorite icon for this tab.
+                    tabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(nestedScrollWebView.getFavoriteOrDefaultIcon(), 64, 64, true));
 
-    @Override
-    protected void onNewIntent(Intent intent) {
-        // Sets the new intent as the activity intent, so that any future `getIntent()`s pick up this one instead of creating a new activity.
-        setIntent(intent);
+                    // Set the loading title text.
+                    tabTitleTextView.setText(R.string.loading);
+                }
+            }
 
-        if (intent.getData() != null) {
-            // Get the intent data and convert it to a string.
-            final Uri intentUriData = intent.getData();
-            formattedUrlString = intentUriData.toString();
-        }
+            // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
+            DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
 
-        // Close the navigation drawer if it is open.
-        if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
-            drawerLayout.closeDrawer(GravityCompat.START);
-        }
+            // Get a full cursor from `domainsDatabaseHelper`.
+            Cursor domainNameCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 
-        // Load the website.
-        loadUrl(formattedUrlString);
+            // Initialize `domainSettingsSet`.
+            Set<String> domainSettingsSet = new HashSet<>();
 
-        // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
-        mainWebView.requestFocus();
-    }
+            // Get the domain name column index.
+            int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
 
-    @Override
-    public void onRestart() {
-        // Run the default commands.
-        super.onRestart();
+            // Populate `domainSettingsSet`.
+            for (int i = 0; i < domainNameCursor.getCount(); i++) {
+                // Move `domainsCursor` to the current row.
+                domainNameCursor.moveToPosition(i);
+
+                // Store the domain name in `domainSettingsSet`.
+                domainSettingsSet.add(domainNameCursor.getString(domainNameColumnIndex));
+            }
 
-        // Apply the app settings, which may have been changed in `SettingsActivity`.
-        applyAppSettings();
+            // Close `domainNameCursor.
+            domainNameCursor.close();
 
-        // Apply the domain settings if returning from the Domains Activity.
-        if (reapplyDomainSettingsOnRestart) {
-            // Reset `reapplyDomainSettingsOnRestart`.
-            reapplyDomainSettingsOnRestart = false;
+            // Initialize the domain name in database variable.
+            String domainNameInDatabase = null;
 
-            // Reapply the domain settings.
-            applyDomainSettings(formattedUrlString);
-        }
+            // Check the hostname against the domain settings set.
+            if (domainSettingsSet.contains(newHostName)) {  // The hostname is contained in the domain settings set.
+                // Record the domain name in the database.
+                domainNameInDatabase = newHostName;
 
-        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-        updatePrivacyIcons(true);
+                // Set the domain settings applied tracker to true.
+                nestedScrollWebView.setDomainSettingsApplied(true);
+            } else {  // The hostname is not contained in the domain settings set.
+                // Set the domain settings applied tracker to false.
+                nestedScrollWebView.setDomainSettingsApplied(false);
+            }
 
-        // Set the display webpage images mode.
-        setDisplayWebpageImages();
+            // Check all the subdomains of the host name against wildcard domains in the domain cursor.
+            while (!nestedScrollWebView.getDomainSettingsApplied() && newHostName.contains(".")) {  // Stop checking if domain settings are already applied or there are no more `.` in the host name.
+                if (domainSettingsSet.contains("*." + newHostName)) {  // Check the host name prepended by `*.`.
+                    // Set the domain settings applied tracker to true.
+                    nestedScrollWebView.setDomainSettingsApplied(true);
 
-        // Reload the webpage if displaying of images has been disabled in `SettingsFragment`.
-        if (reloadOnRestart) {
-            // Reload `mainWebView`.
-            mainWebView.reload();
+                    // Store the applied domain names as it appears in the database.
+                    domainNameInDatabase = "*." + newHostName;
+                }
 
-            // Reset `reloadOnRestartBoolean`.
-            reloadOnRestart = false;
-        }
+                // Strip out the lowest subdomain of of the host name.
+                newHostName = newHostName.substring(newHostName.indexOf(".") + 1);
+            }
 
-        // Load the URL on restart to apply changes to night mode.
-        if (loadUrlOnRestart) {
-            // Load the current `formattedUrlString`.
-            loadUrl(formattedUrlString);
 
-            // Reset `loadUrlOnRestart.
-            loadUrlOnRestart = false;
-        }
+            // Get a handle for the shared preferences.
+            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        //
-        if (restartFromBookmarksActivity) {
-            // Close the bookmarks drawer.
-            drawerLayout.closeDrawer(GravityCompat.END);
+            // Store the general preference information.
+            String defaultFontSizeString = sharedPreferences.getString("font_size", getString(R.string.font_size_default_value));
+            String defaultUserAgentName = sharedPreferences.getString("user_agent", getString(R.string.user_agent_default_value));
+            boolean defaultSwipeToRefresh = sharedPreferences.getBoolean("swipe_to_refresh", true);
+            String webViewTheme = sharedPreferences.getString("webview_theme", getString(R.string.webview_theme_default_value));
+            boolean wideViewport = sharedPreferences.getBoolean("wide_viewport", true);
+            boolean displayWebpageImages = sharedPreferences.getBoolean("display_webpage_images", true);
 
-            // Reload the bookmarks drawer.
-            loadBookmarksFolder();
+            // Get the WebView theme entry values string array.
+            String[] webViewThemeEntryValuesStringArray = getResources().getStringArray(R.array.webview_theme_entry_values);
 
-            // Reset `restartFromBookmarksActivity`.
-            restartFromBookmarksActivity = false;
-        }
-    }
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
 
-    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
-    @Override
-    public void onResume() {
-        // Run the default commands.
-        super.onResume();
+            // Initialize the user agent array adapter and string array.
+            ArrayAdapter<CharSequence> userAgentNamesArray = ArrayAdapter.createFromResource(this, R.array.user_agent_names, R.layout.spinner_item);
+            String[] userAgentDataArray = getResources().getStringArray(R.array.user_agent_data);
 
-        // Resume JavaScript (if enabled).
-        mainWebView.resumeTimers();
+            if (nestedScrollWebView.getDomainSettingsApplied()) {  // The url has custom domain settings.
+                // Get a cursor for the current host and move it to the first position.
+                Cursor currentDomainSettingsCursor = domainsDatabaseHelper.getCursorForDomainName(domainNameInDatabase);
+                currentDomainSettingsCursor.moveToFirst();
 
-        // Resume `mainWebView`.
-        mainWebView.onResume();
+                // Get the settings from the cursor.
+                nestedScrollWebView.setDomainSettingsDatabaseId(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper._ID)));
+                nestedScrollWebView.getSettings().setJavaScriptEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_JAVASCRIPT)) == 1);
+                nestedScrollWebView.setAcceptFirstPartyCookies(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES)) == 1);
+                boolean domainThirdPartyCookiesEnabled = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES)) == 1);
+                nestedScrollWebView.getSettings().setDomStorageEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)) == 1);
+                // Form data can be removed once the minimum API >= 26.
+                boolean saveFormData = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYLIST,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYLIST)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYPRIVACY)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_ANNOYANCE_LIST)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_SOCIAL_BLOCKING_LIST)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ULTRALIST)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_ULTRAPRIVACY)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.BLOCK_ALL_THIRD_PARTY_REQUESTS)) == 1);
+                String userAgentName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.USER_AGENT));
+                int fontSize = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE));
+                int swipeToRefreshInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SWIPE_TO_REFRESH));
+                int webViewThemeInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.WEBVIEW_THEME));
+                int wideViewportInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.WIDE_VIEWPORT));
+                int displayWebpageImagesInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES));
+                boolean pinnedSslCertificate = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.PINNED_SSL_CERTIFICATE)) == 1);
+                String pinnedSslIssuedToCName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_COMMON_NAME));
+                String pinnedSslIssuedToOName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATION));
+                String pinnedSslIssuedToUName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATIONAL_UNIT));
+                String pinnedSslIssuedByCName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_COMMON_NAME));
+                String pinnedSslIssuedByOName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATION));
+                String pinnedSslIssuedByUName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATIONAL_UNIT));
+                boolean pinnedIpAddresses = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.PINNED_IP_ADDRESSES)) == 1);
+                String pinnedHostIpAddresses = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.IP_ADDRESSES));
+
+                // Get the pinned SSL date longs.
+                long pinnedSslStartDateLong = currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_START_DATE));
+                long pinnedSslEndDateLong = currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_END_DATE));
+
+                // Define the pinned SSL date variables.
+                Date pinnedSslStartDate;
+                Date pinnedSslEndDate;
+
+                // Set the pinned SSL certificate start date to `null` if the saved date long is 0 because creating a new date results in an error if the input is 0.
+                if (pinnedSslStartDateLong == 0) {
+                    pinnedSslStartDate = null;
+                } else {
+                    pinnedSslStartDate = new Date(pinnedSslStartDateLong);
+                }
 
-        // Resume the adView for the free flavor.
-        if (BuildConfig.FLAVOR.contentEquals("free")) {
-            BannerAd.resumeAd(adView);
-        }
-    }
+                // Set the pinned SSL certificate end date to `null` if the saved date long is 0 because creating a new date results in an error if the input is 0.
+                if (pinnedSslEndDateLong == 0) {
+                    pinnedSslEndDate = null;
+                } else {
+                    pinnedSslEndDate = new Date(pinnedSslEndDateLong);
+                }
 
-    @Override
-    public void onPause() {
-        // Pause `mainWebView`.
-        mainWebView.onPause();
+                // Close the current host domain settings cursor.
+                currentDomainSettingsCursor.close();
 
-        // Stop all JavaScript.
-        mainWebView.pauseTimers();
+                // If there is a pinned SSL certificate, store it in the WebView.
+                if (pinnedSslCertificate) {
+                    nestedScrollWebView.setPinnedSslCertificate(pinnedSslIssuedToCName, pinnedSslIssuedToOName, pinnedSslIssuedToUName, pinnedSslIssuedByCName, pinnedSslIssuedByOName, pinnedSslIssuedByUName,
+                            pinnedSslStartDate, pinnedSslEndDate);
+                }
 
-        // Pause the adView or it will continue to consume resources in the background on the free flavor.
-        if (BuildConfig.FLAVOR.contentEquals("free")) {
-            BannerAd.pauseAd(adView);
-        }
+                // If there is a pinned IP address, store it in the WebView.
+                if (pinnedIpAddresses) {
+                    nestedScrollWebView.setPinnedIpAddresses(pinnedHostIpAddresses);
+                }
 
-        super.onPause();
-    }
+                // Apply the cookie domain settings.
+                cookieManager.setAcceptCookie(nestedScrollWebView.getAcceptFirstPartyCookies());
 
-    @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        // Inflate the menu; this adds items to the action bar if it is present.
-        getMenuInflater().inflate(R.menu.webview_options_menu, menu);
+                // Set third-party cookies status if API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, domainThirdPartyCookiesEnabled);
+                }
 
-        // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
-        mainMenu = menu;
+                // Apply the form data setting if the API < 26.
+                if (Build.VERSION.SDK_INT < 26) {
+                    nestedScrollWebView.getSettings().setSaveFormData(saveFormData);
+                }
 
-        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
-        updatePrivacyIcons(false);
+                // Apply the font size.
+                try {  // Try the specified font size to see if it is valid.
+                    if (fontSize == 0) {  // Apply the default font size.
+                            // Try to set the font size from the value in the app settings.
+                            nestedScrollWebView.getSettings().setTextZoom(Integer.parseInt(defaultFontSizeString));
+                    } else {  // Apply the font size from domain settings.
+                        nestedScrollWebView.getSettings().setTextZoom(fontSize);
+                    }
+                } catch (Exception exception) {  // The specified font size is invalid
+                    // Set the font size to be 100%
+                    nestedScrollWebView.getSettings().setTextZoom(100);
+                }
 
-        // Get handles for the menu items.
-        MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
-        MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
-        MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
-        MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);
+                // Set the user agent.
+                if (userAgentName.equals(getString(R.string.system_default_user_agent))) {  // Use the system default user agent.
+                    // Get the array position of the default user agent name.
+                    int defaultUserAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
 
-        // Only display third-party cookies if SDK >= 21
-        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
+                    // Set the user agent according to the system default.
+                    switch (defaultUserAgentArrayPosition) {
+                        case UNRECOGNIZED_USER_AGENT:  // The default user agent name is not on the canonical list.
+                            // This is probably because it was set in an older version of Privacy Browser before the switch to persistent user agent names.
+                            nestedScrollWebView.getSettings().setUserAgentString(defaultUserAgentName);
+                            break;
 
-        // Get the shared preference values.  `this` references the current context.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                            // Set the user agent to `""`, which uses the default value.
+                            nestedScrollWebView.getSettings().setUserAgentString("");
+                            break;
 
-        // Set the status of the additional app bar icons.  The default is `false`.
-        if (sharedPreferences.getBoolean("display_additional_app_bar_icons", false)) {
-            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
-            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
-            toggleSaveFormDataMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
-        } else { //Do not display the additional icons.
-            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
-            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
-            toggleSaveFormDataMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
-        }
+                        case SETTINGS_CUSTOM_USER_AGENT:
+                            // Set the default custom user agent.
+                            nestedScrollWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
+                            break;
 
-        return true;
-    }
+                        default:
+                            // Get the user agent string from the user agent data array
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[defaultUserAgentArrayPosition]);
+                    }
+                } else {  // Set the user agent according to the stored name.
+                    // Get the array position of the user agent name.
+                    int userAgentArrayPosition = userAgentNamesArray.getPosition(userAgentName);
 
-    @Override
-    public boolean onPrepareOptionsMenu(Menu menu) {
-        // Get handles for the menu items.
-        MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
-        MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
-        MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
-        MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
-        MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);
-        MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
-        MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
-        MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
-        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);
-        MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
-        MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
-        MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
-
-        // Set the text for the domain menu item.
-        if (domainSettingsApplied) {
-            addOrEditDomain.setTitle(R.string.edit_domain_settings);
-        } else {
-            addOrEditDomain.setTitle(R.string.add_domain_settings);
-        }
+                    switch (userAgentArrayPosition) {
+                        case UNRECOGNIZED_USER_AGENT:  // The user agent name contains a custom user agent.
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentName);
+                            break;
 
-        // Set the status of the menu item checkboxes.
-        toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
-        toggleThirdPartyCookiesMenuItem.setChecked(thirdPartyCookiesEnabled);
-        toggleDomStorageMenuItem.setChecked(domStorageEnabled);
-        toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);
-        displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
+                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                            // Set the user agent to `""`, which uses the default value.
+                            nestedScrollWebView.getSettings().setUserAgentString("");
+                            break;
 
-        // Enable third-party cookies if first-party cookies are enabled.
-        toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
+                        default:
+                            // Get the user agent string from the user agent data array.
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                    }
+                }
 
-        // Enable `DOM Storage` if JavaScript is enabled.
-        toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
+                // Set swipe to refresh.
+                switch (swipeToRefreshInt) {
+                    case DomainsDatabaseHelper.SYSTEM_DEFAULT:
+                        // Store the swipe to refresh status in the nested scroll WebView.
+                        nestedScrollWebView.setSwipeToRefresh(defaultSwipeToRefresh);
+
+                        // Update the swipe refresh layout.
+                        if (defaultSwipeToRefresh) {  // Swipe to refresh is enabled.
+                            // Only enable the swipe refresh layout if the WebView is scrolled to the top.  It is updated every time the scroll changes.
+                            swipeRefreshLayout.setEnabled(currentWebView.getScrollY() == 0);
+                        } else {  // Swipe to refresh is disabled.
+                            // Disable the swipe refresh layout.
+                            swipeRefreshLayout.setEnabled(false);
+                        }
+                        break;
 
-        // Enable `Clear Cookies` if there are any.
-        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
+                    case DomainsDatabaseHelper.ENABLED:
+                        // Store the swipe to refresh status in the nested scroll WebView.
+                        nestedScrollWebView.setSwipeToRefresh(true);
 
-        // Get a count of the number of files in the `Local Storage` directory.
-        File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
-        int localStorageDirectoryNumberOfFiles = 0;
-        if (localStorageDirectory.exists()) {
-            localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
-        }
+                        // Only enable the swipe refresh layout if the WebView is scrolled to the top.  It is updated every time the scroll changes.
+                        swipeRefreshLayout.setEnabled(currentWebView.getScrollY() == 0);
+                        break;
 
-        // Get a count of the number of files in the `IndexedDB` directory.
-        File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
-        int indexedDBDirectoryNumberOfFiles = 0;
-        if (indexedDBDirectory.exists()) {
-            indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
-        }
+                    case DomainsDatabaseHelper.DISABLED:
+                        // Store the swipe to refresh status in the nested scroll WebView.
+                        nestedScrollWebView.setSwipeToRefresh(false);
 
-        // Enable `Clear DOM Storage` if there is any.
-        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
+                        // Disable swipe to refresh.
+                        swipeRefreshLayout.setEnabled(false);
+                }
 
-        // Enable `Clear Form Data` is there is any.
-        WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
-        clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
+                // Check to see if WebView themes are supported.
+                if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
+                    // Set the WebView theme.
+                    switch (webViewThemeInt) {
+                        case DomainsDatabaseHelper.SYSTEM_DEFAULT:
+                            // Set the WebView theme.  A switch statement cannot be used because the WebView theme entry values string array is not a compile time constant.
+                            if (webViewTheme.equals(webViewThemeEntryValuesStringArray[1])) {  // The light theme is selected.
+                                // Turn off the WebView dark mode.
+                                WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_OFF);
+                            } else if (webViewTheme.equals(webViewThemeEntryValuesStringArray[2])) {  // The dark theme is selected.
+                                // Turn on the WebView dark mode.
+                                WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_ON);
+                            } else {  // The system default theme is selected.
+                                // Get the current system theme status.
+                                int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
+
+                                // Set the WebView theme according to the current system theme status.
+                                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {  // The system is in day mode.
+                                    // Turn off the WebView dark mode.
+                                    WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_OFF);
+                                } else {  // The system is in night mode.
+                                    // Turn on the WebView dark mode.
+                                    WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_ON);
+                                }
+                            }
+                            break;
 
-        // Enable `Clear Data` if any of the submenu items are enabled.
-        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
+                        case DomainsDatabaseHelper.LIGHT_THEME:
+                            // Turn off the WebView dark mode.
+                            WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_OFF);
+                            break;
 
-        // Initialize font size variables.
-        int fontSize = mainWebView.getSettings().getTextZoom();
-        String fontSizeTitle;
-        MenuItem selectedFontSizeMenuItem;
+                        case DomainsDatabaseHelper.DARK_THEME:
+                            // Turn on the WebView dark mode.
+                            WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_ON);
+                            break;
+                    }
+                }
 
-        // Prepare the font size title and current size menu item.
-        switch (fontSize) {
-            case 25:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
-                break;
+                // Set the viewport.
+                switch (wideViewportInt) {
+                    case DomainsDatabaseHelper.SYSTEM_DEFAULT:
+                        nestedScrollWebView.getSettings().setUseWideViewPort(wideViewport);
+                        break;
 
-            case 50:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
-                break;
+                    case DomainsDatabaseHelper.ENABLED:
+                        nestedScrollWebView.getSettings().setUseWideViewPort(true);
+                        break;
 
-            case 75:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
-                break;
+                    case DomainsDatabaseHelper.DISABLED:
+                        nestedScrollWebView.getSettings().setUseWideViewPort(false);
+                        break;
+                }
 
-            case 100:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                break;
+                // Set the loading of webpage images.
+                switch (displayWebpageImagesInt) {
+                    case DomainsDatabaseHelper.SYSTEM_DEFAULT:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
+                        break;
 
-            case 125:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
-                break;
+                    case DomainsDatabaseHelper.ENABLED:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(true);
+                        break;
 
-            case 150:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
-                break;
+                    case DomainsDatabaseHelper.DISABLED:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(false);
+                        break;
+                }
 
-            case 175:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
-                break;
+                // Get the current theme status.
+                int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 
-            case 200:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
-                break;
+                // Set a background on the URL relative layout to indicate that custom domain settings are being used.
+                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+                    urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.drawable.url_bar_background_light_green, null));
+                } else {
+                    urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.drawable.url_bar_background_dark_blue, null));
+                }
+            } else {  // The new URL does not have custom domain settings.  Load the defaults.
+                // Store the values from the shared preferences.
+                nestedScrollWebView.getSettings().setJavaScriptEnabled(sharedPreferences.getBoolean("javascript", false));
+                nestedScrollWebView.setAcceptFirstPartyCookies(sharedPreferences.getBoolean("first_party_cookies", false));
+                boolean defaultThirdPartyCookiesEnabled = sharedPreferences.getBoolean("third_party_cookies", false);
+                nestedScrollWebView.getSettings().setDomStorageEnabled(sharedPreferences.getBoolean("dom_storage", false));
+                boolean saveFormData = sharedPreferences.getBoolean("save_form_data", false);  // Form data can be removed once the minimum API >= 26.
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYLIST, sharedPreferences.getBoolean("easylist", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, sharedPreferences.getBoolean("easyprivacy", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, sharedPreferences.getBoolean("fanboys_annoyance_list", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, sharedPreferences.getBoolean("fanboys_social_blocking_list", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, sharedPreferences.getBoolean("ultralist", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, sharedPreferences.getBoolean("ultraprivacy", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, sharedPreferences.getBoolean("block_all_third_party_requests", false));
+
+                // Apply the default first-party cookie setting.
+                cookieManager.setAcceptCookie(nestedScrollWebView.getAcceptFirstPartyCookies());
+
+                // Apply the default font size setting.
+                try {
+                    // Try to set the font size from the value in the app settings.
+                    nestedScrollWebView.getSettings().setTextZoom(Integer.parseInt(defaultFontSizeString));
+                } catch (Exception exception) {
+                    // If the app settings value is invalid, set the font size to 100%.
+                    nestedScrollWebView.getSettings().setTextZoom(100);
+                }
 
-            default:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                break;
-        }
+                // Apply the form data setting if the API < 26.
+                if (Build.VERSION.SDK_INT < 26) {
+                    nestedScrollWebView.getSettings().setSaveFormData(saveFormData);
+                }
 
-        // Set the font size title and select the current size menu item.
-        fontSizeMenuItem.setTitle(fontSizeTitle);
-        selectedFontSizeMenuItem.setChecked(true);
+                // Store the swipe to refresh status in the nested scroll WebView.
+                nestedScrollWebView.setSwipeToRefresh(defaultSwipeToRefresh);
 
-        // Only show `Refresh` if `swipeToRefresh` is disabled.
-        refreshMenuItem.setVisible(!swipeToRefreshEnabled);
+                // Update the swipe refresh layout.
+                if (defaultSwipeToRefresh) {  // Swipe to refresh is enabled.
+                    // Only enable the swipe refresh layout if the WebView is scrolled to the top.  It is updated every time the scroll changes.
+                    swipeRefreshLayout.setEnabled(currentWebView.getScrollY() == 0);
+                } else {  // Swipe to refresh is disabled.
+                    // Disable the swipe refresh layout.
+                    swipeRefreshLayout.setEnabled(false);
+                }
 
-        // Run all the other default commands.
-        super.onPrepareOptionsMenu(menu);
+                // Reset the pinned variables.
+                nestedScrollWebView.setDomainSettingsDatabaseId(-1);
 
-        // Display the menu.
-        return true;
-    }
+                // Set third-party cookies status if API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, defaultThirdPartyCookiesEnabled);
+                }
 
-    @Override
-    // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
-    @SuppressLint("SetJavaScriptEnabled")
-    // removeAllCookies is deprecated, but it is required for API < 21.
-    @SuppressWarnings("deprecation")
-    public boolean onOptionsItemSelected(MenuItem menuItem) {
-        // Get the selected menu item ID.
-        int menuItemId = menuItem.getItemId();
+                // Get the array position of the user agent name.
+                int userAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
 
-        // Set the commands that relate to the menu entries.
-        switch (menuItemId) {
-            case R.id.add_or_edit_domain:
-                if (domainSettingsApplied) {  // Edit the current domain settings.
-                    // Reapply the domain settings on returning to `MainWebViewActivity`.
-                    reapplyDomainSettingsOnRestart = true;
-                    currentDomainName = "";
+                // Set the user agent.
+                switch (userAgentArrayPosition) {
+                    case UNRECOGNIZED_USER_AGENT:  // The default user agent name is not on the canonical list.
+                        // This is probably because it was set in an older version of Privacy Browser before the switch to persistent user agent names.
+                        nestedScrollWebView.getSettings().setUserAgentString(defaultUserAgentName);
+                        break;
 
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                    case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                        // Set the user agent to `""`, which uses the default value.
+                        nestedScrollWebView.getSettings().setUserAgentString("");
+                        break;
 
-                    // Put extra information instructing the domains activity to directly load the current domain.
-                    domainsIntent.putExtra("LoadDomain", domainSettingsDatabaseId);
+                    case SETTINGS_CUSTOM_USER_AGENT:
+                        // Set the default custom user agent.
+                        nestedScrollWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
+                        break;
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                } else {  // Add a new domain.
-                    // Show the add domain `AlertDialog`.
-                    AppCompatDialogFragment addDomainDialog = new AddDomainDialog();
-                    addDomainDialog.show(getSupportFragmentManager(), getResources().getString(R.string.add_domain));
+                    default:
+                        // Get the user agent string from the user agent data array
+                        nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
                 }
-                return true;
 
-            case R.id.toggle_javascript:
-                // Switch the status of javaScriptEnabled.
-                javaScriptEnabled = !javaScriptEnabled;
+                // Apply the WebView theme if supported by the installed WebView.
+                if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
+                    // Set the WebView theme.  A switch statement cannot be used because the WebView theme entry values string array is not a compile time constant.
+                    if (webViewTheme.equals(webViewThemeEntryValuesStringArray[1])) {  // The light theme is selected.
+                        // Turn off the WebView dark mode.
+                        WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_OFF);
+                    } else if (webViewTheme.equals(webViewThemeEntryValuesStringArray[2])) {  // The dark theme is selected.
+                        // Turn on the WebView dark mode.
+                        WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_ON);
+                    } else {  // The system default theme is selected.
+                        // Get the current system theme status.
+                        int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
+
+                        // Set the WebView theme according to the current system theme status.
+                        if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {  // The system is in day mode.
+                            // Turn off the WebView dark mode.
+                            WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_OFF);
+                        } else {  // The system is in night mode.
+                            // Turn on the WebView dark mode.
+                            WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_ON);
+                        }
+                    }
+                }
 
-                // Apply the new JavaScript status.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
+                // Set the viewport.
+                nestedScrollWebView.getSettings().setUseWideViewPort(wideViewport);
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // Set the loading of webpage images.
+                nestedScrollWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
 
-                // Display a `Snackbar`.
-                if (javaScriptEnabled) {  // JavaScrip is enabled.
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
-                } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled, but first-party cookies are enabled.
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
-                } else {  // Privacy mode.
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
-                }
+                // Set a transparent background on the URL relative layout.
+                urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.color.transparent, null));
+            }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+            // Close the domains database helper.
+            domainsDatabaseHelper.close();
 
-            case R.id.toggle_first_party_cookies:
-                // Switch the status of firstPartyCookiesEnabled.
-                firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
+            // Update the privacy icons.
+            updatePrivacyIcons(true);
+        }
 
-                // Update the menu checkbox.
-                menuItem.setChecked(firstPartyCookiesEnabled);
+        // Reload the website if returning from the Domains activity.
+        if (reloadWebsite) {
+            nestedScrollWebView.reload();
+        }
 
-                // Apply the new cookie status.
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
+        // Load the URL if directed.  This makes sure that the domain settings are properly loaded before the URL.  By using `loadUrl()`, instead of `loadUrlFromBase()`, the Referer header will never be sent.
+        if (loadUrl) {
+            nestedScrollWebView.loadUrl(url, customHeaders);
+        }
+    }
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+    private void applyProxy(boolean reloadWebViews) {
+        // Set the proxy according to the mode.  `this` refers to the current activity where an alert dialog might be displayed.
+        ProxyHelper.setProxy(getApplicationContext(), appBarLayout, proxyMode);
 
-                // Display a `Snackbar`.
-                if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
-                } else if (javaScriptEnabled){  // JavaScript is still enabled.
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
-                } else {  // Privacy mode.
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
-                }
+        // Reset the waiting for proxy tracker.
+        waitingForProxy = false;
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Get the current theme status.
+        int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 
-            case R.id.toggle_third_party_cookies:
-                if (Build.VERSION.SDK_INT >= 21) {
-                    // Switch the status of thirdPartyCookiesEnabled.
-                    thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
+        // Update the user interface and reload the WebViews if requested.
+        switch (proxyMode) {
+            case ProxyHelper.NONE:
+                // Initialize a color background typed value.
+                TypedValue colorBackgroundTypedValue = new TypedValue();
 
-                    // Update the menu checkbox.
-                    menuItem.setChecked(thirdPartyCookiesEnabled);
+                // Get the color background from the theme.
+                getTheme().resolveAttribute(android.R.attr.colorBackground, colorBackgroundTypedValue, true);
 
-                    // Apply the new cookie status.
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
+                // Get the color background int from the typed value.
+                int colorBackgroundInt = colorBackgroundTypedValue.data;
 
-                    // Display a `Snackbar`.
-                    if (thirdPartyCookiesEnabled) {
-                        Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
-                    } else {
-                        Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
-                    }
+                // Set the default app bar layout background.
+                appBarLayout.setBackgroundColor(colorBackgroundInt);
+                break;
 
-                    // Reload the WebView.
-                    mainWebView.reload();
-                } // Else do nothing because SDK < 21.
-                return true;
+            case ProxyHelper.TOR:
+                // Set the app bar background to indicate proxying through Orbot is enabled.
+                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+                    appBarLayout.setBackgroundResource(R.color.blue_50);
+                } else {
+                    appBarLayout.setBackgroundResource(R.color.dark_blue_30);
+                }
+
+                // Check to see if Orbot is installed.
+                try {
+                    // Get the package manager.
+                    PackageManager packageManager = getPackageManager();
 
-            case R.id.toggle_dom_storage:
-                // Switch the status of domStorageEnabled.
-                domStorageEnabled = !domStorageEnabled;
+                    // Check to see if Orbot is in the list.  This will throw an error and drop to the catch section if it isn't installed.
+                    packageManager.getPackageInfo("org.torproject.android", 0);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(domStorageEnabled);
+                    // Check to see if the proxy is ready.
+                    if (!orbotStatus.equals("ON")) {  // Orbot is not ready.
+                        // Set the waiting for proxy status.
+                        waitingForProxy = true;
 
-                // Apply the new DOM Storage status.
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
+                        // Show the waiting for proxy dialog if it isn't already displayed.
+                        if (getSupportFragmentManager().findFragmentByTag(getString(R.string.waiting_for_proxy_dialog)) == null) {
+                            // Get a handle for the waiting for proxy alert dialog.
+                            DialogFragment waitingForProxyDialogFragment = new WaitingForProxyDialog();
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                            // Display the waiting for proxy alert dialog.
+                            waitingForProxyDialogFragment.show(getSupportFragmentManager(), getString(R.string.waiting_for_proxy_dialog));
+                        }
+                    }
+                } catch (PackageManager.NameNotFoundException exception) {  // Orbot is not installed.
+                    // Show the Orbot not installed dialog if it is not already displayed.
+                    if (getSupportFragmentManager().findFragmentByTag(getString(R.string.proxy_not_installed_dialog)) == null) {
+                        // Get a handle for the Orbot not installed alert dialog.
+                        DialogFragment orbotNotInstalledDialogFragment = ProxyNotInstalledDialog.displayDialog(proxyMode);
+
+                        // Display the Orbot not installed alert dialog.
+                        orbotNotInstalledDialogFragment.show(getSupportFragmentManager(), getString(R.string.proxy_not_installed_dialog));
+                    }
+                }
+                break;
 
-                // Display a `Snackbar`.
-                if (domStorageEnabled) {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
+            case ProxyHelper.I2P:
+                // Set the app bar background to indicate proxying through Orbot is enabled.
+                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+                    appBarLayout.setBackgroundResource(R.color.blue_50);
                 } else {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
+                    appBarLayout.setBackgroundResource(R.color.dark_blue_30);
                 }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
-
-            case R.id.toggle_save_form_data:
-                // Switch the status of saveFormDataEnabled.
-                saveFormDataEnabled = !saveFormDataEnabled;
-
-                // Update the menu checkbox.
-                menuItem.setChecked(saveFormDataEnabled);
-
-                // Apply the new form data status.
-                mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
+                // Check to see if I2P is installed.
+                try {
+                    // Get the package manager.
+                    PackageManager packageManager = getPackageManager();
+
+                    // Check to see if I2P is in the list.  This will throw an error and drop to the catch section if it isn't installed.
+                    packageManager.getPackageInfo("net.i2p.android.router", 0);
+                } catch (PackageManager.NameNotFoundException exception) {  // I2P is not installed.
+                    // Sow the I2P not installed dialog if it is not already displayed.
+                    if (getSupportFragmentManager().findFragmentByTag(getString(R.string.proxy_not_installed_dialog)) == null) {
+                        // Get a handle for the waiting for proxy alert dialog.
+                        DialogFragment i2pNotInstalledDialogFragment = ProxyNotInstalledDialog.displayDialog(proxyMode);
+
+                        // Display the I2P not installed alert dialog.
+                        i2pNotInstalledDialogFragment.show(getSupportFragmentManager(), getString(R.string.proxy_not_installed_dialog));
+                    }
+                }
+                break;
 
-                // Display a `Snackbar`.
-                if (saveFormDataEnabled) {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
+            case ProxyHelper.CUSTOM:
+                // Set the app bar background to indicate proxying through Orbot is enabled.
+                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+                    appBarLayout.setBackgroundResource(R.color.blue_50);
                 } else {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
+                    appBarLayout.setBackgroundResource(R.color.dark_blue_30);
                 }
+                break;
+        }
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+        // Reload the WebViews if requested and not waiting for the proxy.
+        if (reloadWebViews && !waitingForProxy) {
+            // Reload the WebViews.
+            for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                // Get the WebView tab fragment.
+                WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Get the fragment view.
+                View fragmentView = webViewTabFragment.getView();
 
-            case R.id.clear_cookies:
-                Snackbar.make(findViewById(R.id.main_webview), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
-                        .setAction(R.string.undo, v -> {
-                            // Do nothing because everything will be handled by `onDismissed()` below.
-                        })
-                        .addCallback(new Snackbar.Callback() {
-                            @Override
-                            public void onDismissed(Snackbar snackbar, int event) {
-                                switch (event) {
-                                    // The user pushed the `Undo` button.
-                                    case Snackbar.Callback.DISMISS_EVENT_ACTION:
-                                        // Do nothing.
-                                        break;
-
-                                    // The `Snackbar` was dismissed without the `Undo` button being pushed.
-                                    default:
-                                        // `cookieManager.removeAllCookie()` varies by SDK.
-                                        if (Build.VERSION.SDK_INT < 21) {
-                                            cookieManager.removeAllCookie();
-                                        } else {
-                                            // `null` indicates no callback.
-                                            cookieManager.removeAllCookies(null);
-                                        }
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+                // Only reload the WebViews if they exist.
+                if (fragmentView != null) {
+                    // Get the nested scroll WebView from the tab fragment.
+                    NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-            case R.id.clear_dom_storage:
-                Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
-                        .setAction(R.string.undo, v -> {
-                            // Do nothing because everything will be handled by `onDismissed()` below.
-                        })
-                        .addCallback(new Snackbar.Callback() {
-                            @Override
-                            public void onDismissed(Snackbar snackbar, int event) {
-                                switch (event) {
-                                    // The user pushed the `Undo` button.
-                                    case Snackbar.Callback.DISMISS_EVENT_ACTION:
-                                        // Do nothing.
-                                        break;
-
-                                    // The `Snackbar` was dismissed without the `Undo` button being pushed.
-                                    default:
-                                        // Delete the DOM Storage.
-                                        WebStorage webStorage = WebStorage.getInstance();
-                                        webStorage.deleteAllData();
-
-                                        // Manually delete the DOM storage files and directories.
-                                        try {
-                                            // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
-                                            privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
-
-                                            // Multiple commands must be used because `Runtime.exec()` does not like `*`.
-                                            privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
-                                            privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
-                                            privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
-                                            privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
-                                        } catch (IOException e) {
-                                            // Do nothing if an error is thrown.
-                                        }
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+                    // Reload the WebView.
+                    nestedScrollWebView.reload();
+                }
+            }
+        }
+    }
 
-            case R.id.clear_form_data:
-                Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
-                        .setAction(R.string.undo, v -> {
-                            // Do nothing because everything will be handled by `onDismissed()` below.
-                        })
-                        .addCallback(new Snackbar.Callback() {
-                            @Override
-                            public void onDismissed(Snackbar snackbar, int event) {
-                                switch (event) {
-                                    // The user pushed the `Undo` button.
-                                    case Snackbar.Callback.DISMISS_EVENT_ACTION:
-                                        // Do nothing.
-                                        break;
-
-                                    // The `Snackbar` was dismissed without the `Undo` button being pushed.
-                                    default:
-                                        // Delete the form data.
-                                        WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
-                                        mainWebViewDatabase.clearFormData();
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+    private void updatePrivacyIcons(boolean runInvalidateOptionsMenu) {
+        // Only update the privacy icons if the options menu and the current WebView have already been populated.
+        if ((optionsMenu != null) && (currentWebView != null)) {
+            // Update the privacy icon.
+            if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is enabled.
+                optionsPrivacyMenuItem.setIcon(R.drawable.javascript_enabled);
+            } else if (currentWebView.getAcceptFirstPartyCookies()) {  // JavaScript is disabled but cookies are enabled.
+                optionsPrivacyMenuItem.setIcon(R.drawable.warning);
+            } else {  // All the dangerous features are disabled.
+                optionsPrivacyMenuItem.setIcon(R.drawable.privacy_mode);
+            }
 
-            case R.id.font_size_twenty_five_percent:
-                mainWebView.getSettings().setTextZoom(25);
-                return true;
+            // Get the current theme status.
+            int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 
-            case R.id.font_size_fifty_percent:
-                mainWebView.getSettings().setTextZoom(50);
-                return true;
+            // Update the first-party cookies icon.
+            if (currentWebView.getAcceptFirstPartyCookies()) {  // First-party cookies are enabled.
+                optionsFirstPartyCookiesMenuItem.setIcon(R.drawable.cookies_enabled);
+            } else {  // First-party cookies are disabled.
+                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+                    optionsFirstPartyCookiesMenuItem.setIcon(R.drawable.cookies_disabled_day);
+                } else {
+                    optionsFirstPartyCookiesMenuItem.setIcon(R.drawable.cookies_disabled_night);
+                }
+            }
 
-            case R.id.font_size_seventy_five_percent:
-                mainWebView.getSettings().setTextZoom(75);
-                return true;
+            // Update the refresh icon.
+            if (optionsRefreshMenuItem.getTitle() == getString(R.string.refresh)) {  // The refresh icon is displayed.
+                // Set the icon according to the theme.
+                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+                    optionsRefreshMenuItem.setIcon(R.drawable.refresh_enabled_day);
+                } else {
+                    optionsRefreshMenuItem.setIcon(R.drawable.refresh_enabled_night);
+                }
+            } else {  // The stop icon is displayed.
+                // Set the icon according to the theme.
+                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+                    optionsRefreshMenuItem.setIcon(R.drawable.close_blue_day);
+                } else {
+                    optionsRefreshMenuItem.setIcon(R.drawable.close_blue_night);
+                }
+            }
 
-            case R.id.font_size_one_hundred_percent:
-                mainWebView.getSettings().setTextZoom(100);
-                return true;
+            // `invalidateOptionsMenu()` calls `onPrepareOptionsMenu()` and redraws the icons in the app bar.
+            if (runInvalidateOptionsMenu) {
+                invalidateOptionsMenu();
+            }
+        }
+    }
 
-            case R.id.font_size_one_hundred_twenty_five_percent:
-                mainWebView.getSettings().setTextZoom(125);
-                return true;
+    private void highlightUrlText() {
+        // Only highlight the URL text if the box is not currently selected.
+        if (!urlEditText.hasFocus()) {
+            // Get the URL string.
+            String urlString = urlEditText.getText().toString();
+
+            // Highlight the URL according to the protocol.
+            if (urlString.startsWith("file://") || urlString.startsWith("content://")) {  // This is a file or content URL.
+                // De-emphasize everything before the file name.
+                urlEditText.getText().setSpan(initialGrayColorSpan, 0, urlString.lastIndexOf("/") + 1,Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+            } else {  // This is a web URL.
+                // Get the index of the `/` immediately after the domain name.
+                int endOfDomainName = urlString.indexOf("/", (urlString.indexOf("//") + 2));
+
+                // Create a base URL string.
+                String baseUrl;
+
+                // Get the base URL.
+                if (endOfDomainName > 0) {  // There is at least one character after the base URL.
+                    // Get the base URL.
+                    baseUrl = urlString.substring(0, endOfDomainName);
+                } else {  // There are no characters after the base URL.
+                    // Set the base URL to be the entire URL string.
+                    baseUrl = urlString;
+                }
 
-            case R.id.font_size_one_hundred_fifty_percent:
-                mainWebView.getSettings().setTextZoom(150);
-                return true;
+                // Get the index of the last `.` in the domain.
+                int lastDotIndex = baseUrl.lastIndexOf(".");
 
-            case R.id.font_size_one_hundred_seventy_five_percent:
-                mainWebView.getSettings().setTextZoom(175);
-                return true;
+                // Get the index of the penultimate `.` in the domain.
+                int penultimateDotIndex = baseUrl.lastIndexOf(".", lastDotIndex - 1);
 
-            case R.id.font_size_two_hundred_percent:
-                mainWebView.getSettings().setTextZoom(200);
-                return true;
+                // Markup the beginning of the URL.
+                if (urlString.startsWith("http://")) {  // Highlight the protocol of connections that are not encrypted.
+                    urlEditText.getText().setSpan(redColorSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 
-            case R.id.display_images:
-                if (mainWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
-                    mainWebView.getSettings().setLoadsImagesAutomatically(false);
-                    mainWebView.reload();
-                } else {  // Images are not currently loaded automatically.
-                    mainWebView.getSettings().setLoadsImagesAutomatically(true);
+                    // De-emphasize subdomains.
+                    if (penultimateDotIndex > 0) {  // There is more than one subdomain in the domain name.
+                        urlEditText.getText().setSpan(initialGrayColorSpan, 7, penultimateDotIndex + 1, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+                    }
+                } else if (urlString.startsWith("https://")) {  // De-emphasize the protocol of connections that are encrypted.
+                    if (penultimateDotIndex > 0) {  // There is more than one subdomain in the domain name.
+                        // De-emphasize the protocol and the additional subdomains.
+                        urlEditText.getText().setSpan(initialGrayColorSpan, 0, penultimateDotIndex + 1, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+                    } else {  // There is only one subdomain in the domain name.
+                        // De-emphasize only the protocol.
+                        urlEditText.getText().setSpan(initialGrayColorSpan, 0, 8, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+                    }
                 }
 
-                // Set `onTheFlyDisplayImagesSet`.
-                onTheFlyDisplayImagesSet = true;
-                return true;
+                // De-emphasize the text after the domain name.
+                if (endOfDomainName > 0) {
+                    urlEditText.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+                }
+            }
+        }
+    }
 
-            case R.id.share:
-                // Setup the share string.
-                String shareString = webViewTitle + " – " + urlTextBox.getText().toString();
+    private void loadBookmarksFolder() {
+        // Update the bookmarks cursor with the contents of the bookmarks database for the current folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Create the share intent.
-                Intent shareIntent = new Intent();
-                shareIntent.setAction(Intent.ACTION_SEND);
-                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
-                shareIntent.setType("text/plain");
+        // Populate the bookmarks cursor adapter.  `this` specifies the `Context`.  `false` disables `autoRequery`.
+        bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
+            @Override
+            public View newView(Context context, Cursor cursor, ViewGroup parent) {
+                // Inflate the individual item layout.  `false` does not attach it to the root.
+                return getLayoutInflater().inflate(R.layout.bookmarks_drawer_item_linearlayout, parent, false);
+            }
 
-                // Make it so.
-                startActivity(Intent.createChooser(shareIntent, "Share URL"));
-                return true;
+            @Override
+            public void bindView(View view, Context context, Cursor cursor) {
+                // Get handles for the views.
+                ImageView bookmarkFavoriteIcon = view.findViewById(R.id.bookmark_favorite_icon);
+                TextView bookmarkNameTextView = view.findViewById(R.id.bookmark_name);
 
-            case R.id.find_on_page:
-                // Hide the URL app bar.
-                supportAppBar.setVisibility(View.GONE);
+                // Get the favorite icon byte array from the cursor.
+                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
 
-                // Show the Find on Page `RelativeLayout`.
-                findOnPageLinearLayout.setVisibility(View.VISIBLE);
+                // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
+                Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 
-                // Display the keyboard.  We have to wait 200 ms before running the command to work around a bug in Android.
-                // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
-                findOnPageEditText.postDelayed(() -> {
-                    // Set the focus on `findOnPageEditText`.
-                    findOnPageEditText.requestFocus();
+                // Display the bitmap in `bookmarkFavoriteIcon`.
+                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 
-                    // Display the keyboard.  `0` sets no input flags.
-                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
-                }, 200);
-                return true;
+                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
+                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+                bookmarkNameTextView.setText(bookmarkNameString);
 
-            case R.id.print:
-                // Get a `PrintManager` instance.
-                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
+                // Make the font bold for folders.
+                if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
+                    bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
+                } else {  // Reset the font to default for normal bookmarks.
+                    bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
+                }
+            }
+        };
 
-                // Convert `mainWebView` to `printDocumentAdapter`.
-                PrintDocumentAdapter printDocumentAdapter = mainWebView.createPrintDocumentAdapter();
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
 
-                // Remove the lint error below that `printManager` might be `null`.
-                assert printManager != null;
+        // Populate the list view with the adapter.
+        bookmarksListView.setAdapter(bookmarksCursorAdapter);
 
-                // Print the document.  The print attributes are `null`.
-                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
-                return true;
+        // Get a handle for the bookmarks title text view.
+        TextView bookmarksTitleTextView = findViewById(R.id.bookmarks_title_textview);
 
-            case R.id.view_source:
-                // Launch the Vew Source activity.
-                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
-                startActivity(viewSourceIntent);
-                return true;
+        // Set the bookmarks drawer title.
+        if (currentBookmarksFolder.isEmpty()) {
+            bookmarksTitleTextView.setText(R.string.bookmarks);
+        } else {
+            bookmarksTitleTextView.setText(currentBookmarksFolder);
+        }
+    }
 
-            case R.id.add_to_homescreen:
-                // Show the `CreateHomeScreenShortcutDialog` `AlertDialog` and name this instance `R.string.create_shortcut`.
-                AppCompatDialogFragment createHomeScreenShortcutDialogFragment = new CreateHomeScreenShortcutDialog();
-                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
+    private void openWithApp(String url) {
+        // Create an open with app intent with `ACTION_VIEW`.
+        Intent openWithAppIntent = new Intent(Intent.ACTION_VIEW);
 
-                //Everything else will be handled by `CreateHomeScreenShortcutDialog` and the associated listener below.
-                return true;
+        // Set the URI but not the MIME type.  This should open all available apps.
+        openWithAppIntent.setData(Uri.parse(url));
 
-            case R.id.refresh:
-                mainWebView.reload();
-                return true;
+        // Flag the intent to open in a new task.
+        openWithAppIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            default:
-                // Don't consume the event.
-                return super.onOptionsItemSelected(menuItem);
+        // Try the intent.
+        try {
+            // Show the chooser.
+            startActivity(openWithAppIntent);
+        } catch (ActivityNotFoundException exception) {  // There are no apps available to open the URL.
+            // Show a snackbar with the error.
+            Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
         }
     }
 
-    // removeAllCookies is deprecated, but it is required for API < 21.
-    @SuppressWarnings("deprecation")
-    @Override
-    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
-        int menuItemId = menuItem.getItemId();
+    private void openWithBrowser(String url) {
+        // Create an open with browser intent with `ACTION_VIEW`.
+        Intent openWithBrowserIntent = new Intent(Intent.ACTION_VIEW);
 
-        switch (menuItemId) {
-            case R.id.home:
-                loadUrl(homepage);
-                break;
+        // Set the URI and the MIME type.  `"text/html"` should load browser options.
+        openWithBrowserIntent.setDataAndType(Uri.parse(url), "text/html");
 
-            case R.id.back:
-                if (mainWebView.canGoBack()) {
-                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-                    navigatingHistory = true;
+        // Flag the intent to open in a new task.
+        openWithBrowserIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-                    // Load the previous website in the history.
-                    mainWebView.goBack();
-                }
-                break;
+        // Try the intent.
+        try {
+            // Show the chooser.
+            startActivity(openWithBrowserIntent);
+        } catch (ActivityNotFoundException exception) {  // There are no browsers available to open the URL.
+            // Show a snackbar with the error.
+            Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
+        }
+    }
 
-            case R.id.forward:
-                if (mainWebView.canGoForward()) {
-                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-                    navigatingHistory = true;
+    private String sanitizeUrl(String url) {
+        // Sanitize Google Analytics.
+        if (sanitizeGoogleAnalytics) {
+            // Remove `?utm_`.
+            if (url.contains("?utm_")) {
+                url = url.substring(0, url.indexOf("?utm_"));
+            }
 
-                    // Load the next website in the history.
-                    mainWebView.goForward();
-                }
-                break;
+            // Remove `&utm_`.
+            if (url.contains("&utm_")) {
+                url = url.substring(0, url.indexOf("&utm_"));
+            }
+        }
+
+        // Sanitize Facebook Click IDs.
+        if (sanitizeFacebookClickIds) {
+            // Remove `?fbclid=`.
+            if (url.contains("?fbclid=")) {
+                url = url.substring(0, url.indexOf("?fbclid="));
+            }
 
-            case R.id.history:
-                // Get the `WebBackForwardList`.
-                WebBackForwardList webBackForwardList = mainWebView.copyBackForwardList();
+            // Remove `&fbclid=`.
+            if (url.contains("&fbclid=")) {
+                url = url.substring(0, url.indexOf("&fbclid="));
+            }
 
-                // Show the `UrlHistoryDialog` `AlertDialog` and name this instance `R.string.history`.  `this` is the `Context`.
-                AppCompatDialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(this, webBackForwardList);
-                urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
-                break;
+            // Remove `?fbadid=`.
+            if (url.contains("?fbadid=")) {
+                url = url.substring(0, url.indexOf("?fbadid="));
+            }
 
-            case R.id.downloads:
-                // Launch the system Download Manager.
-                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+            // Remove `&fbadid=`.
+            if (url.contains("&fbadid=")) {
+                url = url.substring(0, url.indexOf("&fbadid="));
+            }
+        }
 
-                // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
-                downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // Sanitize Twitter AMP redirects.
+        if (sanitizeTwitterAmpRedirects) {
+            // Remove `?amp=1`.
+            if (url.contains("?amp=1")) {
+                url = url.substring(0, url.indexOf("?amp=1"));
+            }
+        }
 
-                startActivity(downloadManagerIntent);
-                break;
+        // Return the sanitized URL.
+        return url;
+    }
 
-            case R.id.domains:
-                // Reapply the domain settings on returning to `MainWebViewActivity`.
-                reapplyDomainSettingsOnRestart = true;
-                currentDomainName = "";
+    public void finishedPopulatingBlocklists(ArrayList<ArrayList<List<String[]>>> combinedBlocklists) {
+        // Store the blocklists.
+        easyList = combinedBlocklists.get(0);
+        easyPrivacy = combinedBlocklists.get(1);
+        fanboysAnnoyanceList = combinedBlocklists.get(2);
+        fanboysSocialList = combinedBlocklists.get(3);
+        ultraList = combinedBlocklists.get(4);
+        ultraPrivacy = combinedBlocklists.get(5);
+
+        // Check to see if the activity has been restarted with a saved state.
+        if ((savedStateArrayList == null) || (savedStateArrayList.size() == 0)) {  // The activity has not been restarted or it was restarted on start to force the night theme.
+            // Add the first tab.
+            addNewTab("", true);
+        } else {  // The activity has been restarted.
+            // Restore each tab.  Once the minimum API >= 24, a `forEach()` command can be used.
+            for (int i = 0; i < savedStateArrayList.size(); i++) {
+                // Add a new tab.
+                tabLayout.addTab(tabLayout.newTab());
+
+                // Get the new tab.
+                TabLayout.Tab newTab = tabLayout.getTabAt(i);
+
+                // Remove the lint warning below that the current tab might be null.
+                assert newTab != null;
+
+                // Set a custom view on the new tab.
+                newTab.setCustomView(R.layout.tab_custom_view);
+
+                // Add the new page.
+                webViewPagerAdapter.restorePage(savedStateArrayList.get(i), savedNestedScrollWebViewStateArrayList.get(i));
+            }
 
-                // Launch `DomainsActivity`.
-                Intent domainsIntent = new Intent(this, DomainsActivity.class);
-                startActivity(domainsIntent);
-                break;
+            // Reset the saved state variables.
+            savedStateArrayList = null;
+            savedNestedScrollWebViewStateArrayList = null;
+
+            // Restore the selected tab position.
+            if (savedTabPosition == 0) {  // The first tab is selected.
+                // Set the first page as the current WebView.
+                setCurrentWebView(0);
+            } else {  // the first tab is not selected.
+                // Move to the selected tab.
+                webViewPager.setCurrentItem(savedTabPosition);
+            }
 
-            case R.id.settings:
-                // Reapply the domain settings on returning to `MainWebViewActivity`.
-                reapplyDomainSettingsOnRestart = true;
-                currentDomainName = "";
+            // Get the intent that started the app.
+            Intent intent = getIntent();
 
-                // Launch `SettingsActivity`.
-                Intent settingsIntent = new Intent(this, SettingsActivity.class);
-                startActivity(settingsIntent);
-                break;
+            // Reset the intent.  This prevents a duplicate tab from being created on restart.
+            setIntent(new Intent());
 
-            case R.id.guide:
-                // Launch `GuideActivity`.
-                Intent guideIntent = new Intent(this, GuideActivity.class);
-                startActivity(guideIntent);
-                break;
+            // Get the information from the intent.
+            String intentAction = intent.getAction();
+            Uri intentUriData = intent.getData();
+            String intentStringExtra = intent.getStringExtra(Intent.EXTRA_TEXT);
 
-            case R.id.about:
-                // Launch `AboutActivity`.
-                Intent aboutIntent = new Intent(this, AboutActivity.class);
-                startActivity(aboutIntent);
-                break;
+            // Determine if this is a web search.
+            boolean isWebSearch = ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH));
 
-            case R.id.clearAndExit:
-                // Get a handle for `sharedPreferences`.  `this` references the current context.
+            // Only process the URI if it contains data or it is a web search.  If the user pressed the desktop icon after the app was already running the URI will be null.
+            if (intentUriData != null || intentStringExtra != null || isWebSearch) {
+                // Get the shared preferences.
                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+                // Create a URL string.
+                String url;
 
-                // Clear cookies.
-                if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
-                    // The command to remove cookies changed slightly in API 21.
-                    if (Build.VERSION.SDK_INT >= 21) {
-                        cookieManager.removeAllCookies(null);
-                    } else {
-                        cookieManager.removeAllCookie();
-                    }
+                // If the intent action is a web search, perform the search.
+                if (isWebSearch) {  // The intent is a web search.
+                    // Create an encoded URL string.
+                    String encodedUrlString;
 
-                    // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+                    // Sanitize the search input and convert it to a search.
                     try {
-                        // We have to use two commands because `Runtime.exec()` does not like `*`.
-                        privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
-                        privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
-                    } catch (IOException e) {
-                        // Do nothing if an error is thrown.
+                        encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                    } catch (UnsupportedEncodingException exception) {
+                        encodedUrlString = "";
                     }
-                }
-
-                // Clear DOM storage.
-                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
-                    // Ask `WebStorage` to clear the DOM storage.
-                    WebStorage webStorage = WebStorage.getInstance();
-                    webStorage.deleteAllData();
 
-                    // Manually delete the DOM storage files and directories, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
-                    try {
-                        // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
-                        privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
-
-                        // Multiple commands must be used because `Runtime.exec()` does not like `*`.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
-                        privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
-                        privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
-                    } catch (IOException e) {
-                        // Do nothing if an error is thrown.
-                    }
+                    // Add the base search URL.
+                    url = searchURL + encodedUrlString;
+                } else if (intentUriData != null) {  // The intent contains a URL formatted as a URI.
+                    // Set the intent data as the URL.
+                    url = intentUriData.toString();
+                } else {  // The intent contains a string, which might be a URL.
+                    // Set the intent string as the URL.
+                    url = intentStringExtra;
                 }
 
-                // Clear form data.
-                if (clearEverything || sharedPreferences.getBoolean("clear_form_data", true)) {
-                    WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
-                    webViewDatabase.clearFormData();
+                // Add a new tab if specified in the preferences.
+                if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {  // Load the URL in a new tab.
+                    // Set the loading new intent flag.
+                    loadingNewIntent = true;
 
-                    // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
-                    try {
-                        // We have to use a `String[]` because the database contains a space and `Runtime.exec` will not escape the string correctly otherwise.
-                        privacyBrowserRuntime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
-                        privacyBrowserRuntime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data-journal"});
-                    } catch (IOException e) {
-                        // Do nothing if an error is thrown.
-                    }
+                    // Add a new tab.
+                    addNewTab(url, true);
+                } else {  // Load the URL in the current tab.
+                    // Make it so.
+                    loadUrl(currentWebView, url);
                 }
+            }
+        }
+    }
 
-                // Clear the cache.
-                if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
-                    // `true` includes disk files.
-                    mainWebView.clearCache(true);
+    public void addTab(View view) {
+        // Add a new tab with a blank URL.
+        addNewTab("", true);
+    }
 
-                    // Manually delete the cache directories.
-                    try {
-                        // Delete the main cache directory.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
-                        // Delete the secondary `Service Worker` cache directory.
-                        // We have to use a `String[]` because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
-                        privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
-                    } catch (IOException e) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+    private void addNewTab(String url, boolean moveToTab) {
+        // Clear the focus from the URL edit text, so that it will be populated with the information from the new tab.
+        urlEditText.clearFocus();
 
-                // Clear SSL certificate preferences.
-                mainWebView.clearSslPreferences();
+        // Get the new page number.  The page numbers are 0 indexed, so the new page number will match the current count.
+        int newTabNumber = tabLayout.getTabCount();
 
-                // Clear the back/forward history.
-                mainWebView.clearHistory();
+        // Add a new tab.
+        tabLayout.addTab(tabLayout.newTab());
 
-                // Clear `formattedUrlString`.
-                formattedUrlString = null;
+        // Get the new tab.
+        TabLayout.Tab newTab = tabLayout.getTabAt(newTabNumber);
 
-                // Clear `customHeaders`.
-                customHeaders.clear();
+        // Remove the lint warning below that the current tab might be null.
+        assert newTab != null;
 
-                // Detach all views from `mainWebViewRelativeLayout`.
-                mainWebViewRelativeLayout.removeAllViews();
+        // Set a custom view on the new tab.
+        newTab.setCustomView(R.layout.tab_custom_view);
 
-                // Destroy the internal state of `mainWebView`.
-                mainWebView.destroy();
+        // Add the new WebView page.
+        webViewPagerAdapter.addPage(newTabNumber, webViewPager, url, moveToTab);
+    }
 
-                // Manually delete the `app_webview` folder, which contains the cookies, DOM storage, form data, and `Service Worker` cache.
-                // See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
-                if (clearEverything) {
-                    try {
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
-                    } catch (IOException e) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+    public void closeTab(View view) {
+        // Run the command according to the number of tabs.
+        if (tabLayout.getTabCount() > 1) {  // There is more than one tab open.
+            // Close the current tab.
+            closeCurrentTab();
+        } else {  // There is only one tab open.
+            clearAndExit();
+        }
+    }
 
-                // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    finishAndRemoveTask();
-                } else {
-                    finish();
-                }
+    private void closeCurrentTab() {
+        // Get the current tab number.
+        int currentTabNumber = tabLayout.getSelectedTabPosition();
 
-                // Remove the terminated program from RAM.  The status code is `0`.
-                System.exit(0);
-                break;
-        }
+        // Delete the current tab.
+        tabLayout.removeTabAt(currentTabNumber);
 
-        // Close the navigation drawer.
-        drawerLayout.closeDrawer(GravityCompat.START);
-        return true;
+        // Delete the current page.  If the selected page number did not change during the delete (because the newly selected tab has has same number as the previously deleted tab), it will return true,
+        // meaning that the current WebView must be reset.  Otherwise it will happen automatically as the selected tab number changes.
+        if (webViewPagerAdapter.deletePage(currentTabNumber, webViewPager)) {
+            setCurrentWebView(currentTabNumber);
+        }
     }
 
-    @Override
-    public void onPostCreate(Bundle savedInstanceState) {
-        super.onPostCreate(savedInstanceState);
+    private void clearAndExit() {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // Sync the state of the DrawerToggle after onRestoreInstanceState has finished.
-        drawerToggle.syncState();
-    }
+        // Close the bookmarks cursor and database.
+        bookmarksCursor.close();
+        bookmarksDatabaseHelper.close();
 
-    @Override
-    public void onConfigurationChanged(Configuration newConfig) {
-        super.onConfigurationChanged(newConfig);
+        // Get the status of the clear everything preference.
+        boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
 
-        // Reload the ad for the free flavor if we are not in full screen mode.
-        if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
-            // Reload the ad.
-            BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
+        // Get a handle for the runtime.
+        Runtime runtime = Runtime.getRuntime();
 
-            // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
-            adView = findViewById(R.id.adview);
+        // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
+        // which links to `/data/data/com.stoutner.privacybrowser.standard`.
+        String privateDataDirectoryString = getApplicationInfo().dataDir;
+
+        // Clear cookies.
+        if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
+            // The command to remove cookies changed slightly in API 21.
+            if (Build.VERSION.SDK_INT >= 21) {
+                CookieManager.getInstance().removeAllCookies(null);
+            } else {
+                CookieManager.getInstance().removeAllCookie();
+            }
+
+            // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+            try {
+                // Two commands must be used because `Runtime.exec()` does not like `*`.
+                Process deleteCookiesProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
+                Process deleteCookiesJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
+
+                // Wait until the processes have finished.
+                deleteCookiesProcess.waitFor();
+                deleteCookiesJournalProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
         }
 
-        // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
-        // https://code.google.com/p/android/issues/detail?id=20493#c8
-        // ActivityCompat.invalidateOptionsMenu(this);
-    }
+        // Clear DOM storage.
+        if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
+            // Ask `WebStorage` to clear the DOM storage.
+            WebStorage webStorage = WebStorage.getInstance();
+            webStorage.deleteAllData();
 
-    @Override
-    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
-        // Store the `HitTestResult`.
-        final WebView.HitTestResult hitTestResult = mainWebView.getHitTestResult();
+            // Manually delete the DOM storage files and directories, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+            try {
+                // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                Process deleteLocalStorageProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
+
+                // Multiple commands must be used because `Runtime.exec()` does not like `*`.
+                Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
+                Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
+                Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
+                Process deleteDatabaseProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
+
+                // Wait until the processes have finished.
+                deleteLocalStorageProcess.waitFor();
+                deleteIndexProcess.waitFor();
+                deleteQuotaManagerProcess.waitFor();
+                deleteQuotaManagerJournalProcess.waitFor();
+                deleteDatabaseProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
 
-        // Create strings.
-        final String imageUrl;
-        final String linkUrl;
+        // Clear form data if the API < 26.
+        if ((Build.VERSION.SDK_INT < 26) && (clearEverything || sharedPreferences.getBoolean("clear_form_data", true))) {
+            WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
+            webViewDatabase.clearFormData();
 
-        // Get a handle for the `ClipboardManager`.
-        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+            // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+            try {
+                // A string array must be used because the database contains a space and `Runtime.exec` will not otherwise escape the string correctly.
+                Process deleteWebDataProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
+                Process deleteWebDataJournalProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data-journal"});
+
+                // Wait until the processes have finished.
+                deleteWebDataProcess.waitFor();
+                deleteWebDataJournalProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
 
-        // Remove the lint errors below that `clipboardManager` might be `null`.
-        assert clipboardManager != null;
+        // Clear the logcat.
+        if (clearEverything || sharedPreferences.getBoolean(getString(R.string.clear_logcat_key), true)) {
+            try {
+                // Clear the logcat.  `-c` clears the logcat.  `-b all` clears all the buffers (instead of just crash, main, and system).
+                Process process = Runtime.getRuntime().exec("logcat -b all -c");
 
-        switch (hitTestResult.getType()) {
-            // `SRC_ANCHOR_TYPE` is a link.
-            case WebView.HitTestResult.SRC_ANCHOR_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
+                // Wait for the process to finish.
+                process.waitFor();
+            } catch (IOException|InterruptedException exception) {
+                // Do nothing.
+            }
+        }
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+        // Clear the cache.
+        if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
+            // Clear the cache from each WebView.
+            for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                // Get the WebView tab fragment.
+                WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                // Add a `Load URL` entry.
-                menu.add(R.string.load_url).setOnMenuItemClickListener(item -> {
-                    loadUrl(linkUrl);
-                    return false;
-                });
+                // Get the WebView fragment view.
+                View webViewFragmentView = webViewTabFragment.getView();
 
-                // Add a `Copy URL` entry.
-                menu.add(R.string.copy_url).setOnMenuItemClickListener(item -> {
-                    // Save the link URL in a `ClipData`.
-                    ClipData srcAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
+                // Only clear the cache if the WebView exists.
+                if (webViewFragmentView != null) {
+                    // Get the nested scroll WebView from the tab fragment.
+                    NestedScrollWebView nestedScrollWebView = webViewFragmentView.findViewById(R.id.nestedscroll_webview);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
-                    return false;
-                });
+                    // Clear the cache for this WebView.
+                    nestedScrollWebView.clearCache(true);
+                }
+            }
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+            // Manually delete the cache directories.
+            try {
+                // Delete the main cache directory.
+                Process deleteCacheProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+
+                // Delete the secondary `Service Worker` cache directory.
+                // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                Process deleteServiceWorkerProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
+
+                // Wait until the processes have finished.
+                deleteCacheProcess.waitFor();
+                deleteServiceWorkerProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
 
-            case WebView.HitTestResult.EMAIL_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
+        // Wipe out each WebView.
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+            // Get the WebView frame layout.
+            FrameLayout webViewFrameLayout = (FrameLayout) webViewTabFragment.getView();
 
-                // Add a `Write Email` entry.
-                menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
-                    // We use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
-                    Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
+            // Only wipe out the WebView if it exists.
+            if (webViewFrameLayout != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = webViewFrameLayout.findViewById(R.id.nestedscroll_webview);
 
-                    // Parse the url and set it as the data for the `Intent`.
-                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
+                // Clear SSL certificate preferences for this WebView.
+                nestedScrollWebView.clearSslPreferences();
 
-                    // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
-                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                // Clear the back/forward history for this WebView.
+                nestedScrollWebView.clearHistory();
 
-                    // Make it so.
-                    startActivity(emailIntent);
-                    return false;
-                });
+                // Remove all the views from the frame layout.
+                webViewFrameLayout.removeAllViews();
 
-                // Add a `Copy Email Address` entry.
-                menu.add(R.string.copy_email_address).setOnMenuItemClickListener(item -> {
-                    // Save the email address in a `ClipData`.
-                    ClipData srcEmailTypeClipData = ClipData.newPlainText(getString(R.string.email_address), linkUrl);
+                // Destroy the internal state of the WebView.
+                nestedScrollWebView.destroy();
+            }
+        }
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
-                    return false;
-                });
+        // Clear the custom headers.
+        customHeaders.clear();
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+        // Manually delete the `app_webview` folder, which contains the cookies, DOM storage, form data, and `Service Worker` cache.
+        // See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
+        if (clearEverything) {
+            try {
+                // Delete the folder.
+                Process deleteAppWebviewProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
 
-            // `IMAGE_TYPE` is an image.
-            case WebView.HitTestResult.IMAGE_TYPE:
-                // Get the image URL.
-                imageUrl = hitTestResult.getExtra();
+                // Wait until the process has finished.
+                deleteAppWebviewProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+        // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
+        if (Build.VERSION.SDK_INT >= 21) {
+            finishAndRemoveTask();
+        } else {
+            finish();
+        }
 
-                // Add a `View Image` entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+        // Remove the terminated program from RAM.  The status code is `0`.
+        System.exit(0);
+    }
 
-                // Add a `Download Image` entry.
-                menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Show the `DownloadImageDialog` `AlertDialog` and name this instance `@string/download`.
-                    AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
-                    downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                    return false;
-                });
+    public void bookmarksBack(View view) {
+        if (currentBookmarksFolder.isEmpty()) {  // The home folder is displayed.
+            // close the bookmarks drawer.
+            drawerLayout.closeDrawer(GravityCompat.END);
+        } else {  // A subfolder is displayed.
+            // Place the former parent folder in `currentFolder`.
+            currentBookmarksFolder = bookmarksDatabaseHelper.getParentFolderName(currentBookmarksFolder);
 
-                // Add a `Copy URL` entry.
-                menu.add(R.string.copy_url).setOnMenuItemClickListener(item -> {
-                    // Save the image URL in a `ClipData`.
-                    ClipData srcImageTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
+            // Load the new folder.
+            loadBookmarksFolder();
+        }
+    }
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageTypeClipData);
-                    return false;
-                });
+    private void setCurrentWebView(int pageNumber) {
+        // Stop the swipe to refresh indicator if it is running
+        swipeRefreshLayout.setRefreshing(false);
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+        // Get the WebView tab fragment.
+        WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(pageNumber);
 
+        // Get the fragment view.
+        View webViewFragmentView = webViewTabFragment.getView();
 
-            // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
-            case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
-                // Get the image URL.
-                imageUrl = hitTestResult.getExtra();
+        // Set the current WebView if the fragment view is not null.
+        if (webViewFragmentView != null) {  // The fragment has been populated.
+            // Store the current WebView.
+            currentWebView = webViewFragmentView.findViewById(R.id.nestedscroll_webview);
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+            // Update the status of swipe to refresh.
+            if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
+                // Enable the swipe refresh layout if the WebView is scrolled all the way to the top.  It is updated every time the scroll changes.
+                swipeRefreshLayout.setEnabled(currentWebView.getScrollY() == 0);
+            } else {  // Swipe to refresh is disabled.
+                // Disable the swipe refresh layout.
+                swipeRefreshLayout.setEnabled(false);
+            }
 
-                // Add a `View Image` entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
 
-                // Add a `Download Image` entry.
-                menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Show the `DownloadImageDialog` `AlertDialog` and name this instance `@string/download`.
-                    AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
-                    downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                    return false;
-                });
+            // Set the first-party cookie status.
+            cookieManager.setAcceptCookie(currentWebView.getAcceptFirstPartyCookies());
 
-                // Add a `Copy URL` entry.
-                menu.add(R.string.copy_url).setOnMenuItemClickListener(item -> {
-                    // Save the image URL in a `ClipData`.
-                    ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
+            // Update the privacy icons.  `true` redraws the icons in the app bar.
+            updatePrivacyIcons(true);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
-                    return false;
-                });
+            // Get a handle for the input method manager.
+            InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
-        }
-    }
+            // Remove the lint warning below that the input method manager might be null.
+            assert inputMethodManager != null;
 
-    @Override
-    public void onAddDomain(AppCompatDialogFragment dialogFragment) {
-        // Reapply the domain settings on returning to `MainWebViewActivity`.
-        reapplyDomainSettingsOnRestart = true;
-        currentDomainName = "";
+            // Get the current URL.
+            String url = currentWebView.getUrl();
 
-        // Get the new domain name `String` from `dialogFragment`.
-        EditText domainNameEditText = dialogFragment.getDialog().findViewById(R.id.domain_name_edittext);
-        String domainNameString = domainNameEditText.getText().toString();
+            // Update the URL edit text if not loading a new intent.  Otherwise, this will be handled by `onPageStarted()` (if called) and `onPageFinished()`.
+            if (!loadingNewIntent) {  // A new intent is not being loaded.
+                if ((url == null) || url.equals("about:blank")) {  // The WebView is blank.
+                    // Display the hint in the URL edit text.
+                    urlEditText.setText("");
 
-        // Initialize the database handler.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
-        // The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
-        DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
+                    // Request focus for the URL text box.
+                    urlEditText.requestFocus();
 
-        // Create the domain and store the database ID in `currentDomainDatabaseId`.
-        int newDomainDatabaseId = domainsDatabaseHelper.addDomain(domainNameString);
+                    // Display the keyboard.
+                    inputMethodManager.showSoftInput(urlEditText, 0);
+                } else {  // The WebView has a loaded URL.
+                    // Clear the focus from the URL text box.
+                    urlEditText.clearFocus();
 
-        // Create an intent to launch the domains activity.
-        Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                    // Hide the soft keyboard.
+                    inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
 
-        // Put extra information instructing the domains activity to directly load the current domain.
-        domainsIntent.putExtra("LoadDomain", newDomainDatabaseId);
+                    // Display the current URL in the URL text box.
+                    urlEditText.setText(url);
 
-        // Make it so.
-        startActivity(domainsIntent);
-    }
+                    // Highlight the URL text.
+                    highlightUrlText();
+                }
+            } else {  // A new intent is being loaded.
+                // Reset the loading new intent tracker.
+                loadingNewIntent = false;
+            }
 
-    @Override
-    public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
-        // Get the `EditTexts` from the `dialogFragment`.
-        EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
-        EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
+            // Set the background to indicate the domain settings status.
+            if (currentWebView.getDomainSettingsApplied()) {
+                // Get the current theme status.
+                int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 
-        // Extract the strings from the `EditTexts`.
-        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
+                // Set a green background on the URL relative layout to indicate that custom domain settings are being used.
+                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+                    urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.drawable.url_bar_background_light_green, null));
+                } else {
+                    urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.drawable.url_bar_background_dark_blue, null));
+                }
+            } else {
+                urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.color.transparent, null));
+            }
+        } else {  // The fragment has not been populated.  Try again in 100 milliseconds.
+            // Create a handler to set the current WebView.
+            Handler setCurrentWebViewHandler = new Handler();
+
+            // Create a runnable to set the current WebView.
+            Runnable setCurrentWebWebRunnable = () -> {
+                // Set the current WebView.
+                setCurrentWebView(pageNumber);
+            };
+
+            // Try setting the current WebView again after 100 milliseconds.
+            setCurrentWebViewHandler.postDelayed(setCurrentWebWebRunnable, 100);
+        }
+    }
 
-        // Convert the favoriteIcon Bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
-        favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
-        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
+    @Override
+    public void initializeWebView(NestedScrollWebView nestedScrollWebView, int pageNumber, ProgressBar progressBar, String url, Boolean restoringState) {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // Display the new bookmark below the current items in the (0 indexed) list.
-        int newBookmarkDisplayOrder = bookmarksListView.getCount();
+        // Get the WebView theme.
+        String webViewTheme = sharedPreferences.getString("webview_theme", getString(R.string.webview_theme_default_value));
+
+        // Get the WebView theme entry values string array.
+        String[] webViewThemeEntryValuesStringArray = getResources().getStringArray(R.array.webview_theme_entry_values);
+
+        // Apply the WebView theme if supported by the installed WebView.
+        if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
+            // Set the WebView theme.  A switch statement cannot be used because the WebView theme entry values string array is not a compile time constant.
+            if (webViewTheme.equals(webViewThemeEntryValuesStringArray[1])) {  // The light theme is selected.
+                // Turn off the WebView dark mode.
+                WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_OFF);
+
+                // Make the WebView visible. The WebView was created invisible in `webview_framelayout` to prevent a white background splash in night mode.
+                // If the system is currently in night mode, showing the WebView will be handled in `onProgressChanged()`.
+                nestedScrollWebView.setVisibility(View.VISIBLE);
+            } else if (webViewTheme.equals(webViewThemeEntryValuesStringArray[2])) {  // The dark theme is selected.
+                // Turn on the WebView dark mode.
+                WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_ON);
+            } else {  // The system default theme is selected.
+                // Get the current system theme status.
+                int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
+
+                // Set the WebView theme according to the current system theme status.
+                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {  // The system is in day mode.
+                    // Turn off the WebView dark mode.
+                    WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_OFF);
+
+                    // Make the WebView visible. The WebView was created invisible in `webview_framelayout` to prevent a white background splash in night mode.
+                    // If the system is currently in night mode, showing the WebView will be handled in `onProgressChanged()`.
+                    nestedScrollWebView.setVisibility(View.VISIBLE);
+                } else {  // The system is in night mode.
+                    // Turn on the WebView dark mode.
+                    WebSettingsCompat.setForceDark(nestedScrollWebView.getSettings(), WebSettingsCompat.FORCE_DARK_ON);
+                }
+            }
+        }
 
-        // Create the bookmark.
-        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
+        // Get a handle for the activity
+        Activity activity = this;
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+        // Get a handle for the input method manager.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+        // Instantiate the blocklist helper.
+        BlocklistHelper blocklistHelper = new BlocklistHelper();
 
-        // Scroll to the new bookmark.
-        bookmarksListView.setSelection(newBookmarkDisplayOrder);
-    }
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-    @Override
-    public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
-        // Get handles for the views in `dialogFragment`.
-        EditText createFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
-        RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
-        ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
+        // Initialize the favorite icon.
+        nestedScrollWebView.initializeFavoriteIcon();
 
-        // Get new folder name string.
-        String folderNameString = createFolderNameEditText.getText().toString();
+        // Set the app bar scrolling.
+        nestedScrollWebView.setNestedScrollingEnabled(sharedPreferences.getBoolean("scroll_app_bar", true));
 
-        // Get the new folder icon `Bitmap`.
-        Bitmap folderIconBitmap;
-        if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
-            // Get the default folder icon and convert it to a `Bitmap`.
-            Drawable folderIconDrawable = folderIconImageView.getDrawable();
-            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
-            folderIconBitmap = folderIconBitmapDrawable.getBitmap();
-        } else {  // Use the `WebView` favorite icon.
-            folderIconBitmap = favoriteIconBitmap;
-        }
+        // Allow pinch to zoom.
+        nestedScrollWebView.getSettings().setBuiltInZoomControls(true);
 
-        // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
-        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
-        folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
-        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+        // Hide zoom controls.
+        nestedScrollWebView.getSettings().setDisplayZoomControls(false);
 
-        // Move all the bookmarks down one in the display order.
-        for (int i = 0; i < bookmarksListView.getCount(); i++) {
-            int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
-            bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
+        // Don't allow mixed content (HTTP and HTTPS) on the same website.
+        if (Build.VERSION.SDK_INT >= 21) {
+            nestedScrollWebView.getSettings().setMixedContentMode(WebSettings.MIXED_CONTENT_NEVER_ALLOW);
         }
 
-        // Create the folder, which will be placed at the top of the `ListView`.
-        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
+        // Set the WebView to load in overview mode (zoomed out to the maximum width).
+        nestedScrollWebView.getSettings().setLoadWithOverviewMode(true);
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+        // Explicitly disable geolocation.
+        nestedScrollWebView.getSettings().setGeolocationEnabled(false);
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+        // Allow loading of file:// URLs.  This is necessary for opening MHT web archives, which are copies into a temporary cache location.
+        nestedScrollWebView.getSettings().setAllowFileAccess(true);
 
-        // Scroll to the new folder.
-        bookmarksListView.setSelection(0);
-    }
+        // Create a double-tap gesture detector to toggle full-screen mode.
+        GestureDetector doubleTapGestureDetector = new GestureDetector(getApplicationContext(), new GestureDetector.SimpleOnGestureListener() {
+            // Override `onDoubleTap()`.  All other events are handled using the default settings.
+            @Override
+            public boolean onDoubleTap(MotionEvent event) {
+                if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
+                    // Toggle the full screen browsing mode tracker.
+                    inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
 
-    @Override
-    public void onCreateHomeScreenShortcut(AppCompatDialogFragment dialogFragment) {
-        // Get the shortcut name.
-        EditText shortcutNameEditText = dialogFragment.getDialog().findViewById(R.id.shortcut_name_edittext);
-        String shortcutNameString = shortcutNameEditText.getText().toString();
+                    // Toggle the full screen browsing mode.
+                    if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
+                        // Hide the app bar if specified.
+                        if (hideAppBar) {
+                            // Close the find on page bar if it is visible.
+                            closeFindOnPage(null);
+
+                            // Hide the tab linear layout.
+                            tabsLinearLayout.setVisibility(View.GONE);
+
+                            // Hide the action bar.
+                            actionBar.hide();
+
+                            // Check to see if the app bar is normally scrolled.
+                            if (scrollAppBar) {  // The app bar is scrolled when it is displayed.
+                                // Get the swipe refresh layout parameters.
+                                CoordinatorLayout.LayoutParams swipeRefreshLayoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
+
+                                // Remove the off-screen scrolling layout.
+                                swipeRefreshLayoutParams.setBehavior(null);
+                            } else {  // The app bar is not scrolled when it is displayed.
+                                // Remove the padding from the top of the swipe refresh layout.
+                                swipeRefreshLayout.setPadding(0, 0, 0, 0);
+
+                                // The swipe refresh circle must be moved above the now removed status bar location.
+                                swipeRefreshLayout.setProgressViewOffset(false, -200, defaultProgressViewEndOffset);
+                            }
+                        }
+
+                        // Hide the banner ad in the free flavor.
+                        if (BuildConfig.FLAVOR.contentEquals("free")) {
+                            // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+                            View adView = findViewById(R.id.adview);
 
-        // Convert the favorite icon bitmap to an `Icon`.  `IconCompat` is required until API >= 26.
-        IconCompat favoriteIcon = IconCompat.createWithBitmap(favoriteIconBitmap);
+                            // Hide the banner ad.
+                            AdHelper.hideAd(adView);
+                        }
 
-        // Setup the shortcut intent.
-        Intent shortcutIntent = new Intent();
-        shortcutIntent.setAction(Intent.ACTION_VIEW);
-        shortcutIntent.setData(Uri.parse(formattedUrlString));
+                        /* Hide the system bars.
+                         * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                         * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                         * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                         * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                         */
+                        rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                                View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+                    } else {  // Switch to normal viewing mode.
+                        // Show the app bar if it was hidden.
+                        if (hideAppBar) {
+                            // Show the tab linear layout.
+                            tabsLinearLayout.setVisibility(View.VISIBLE);
+
+                            // Show the action bar.
+                            actionBar.show();
+
+                            // Check to see if the app bar is normally scrolled.
+                            if (scrollAppBar) {  // The app bar is scrolled when it is displayed.
+                                // Get the swipe refresh layout parameters.
+                                CoordinatorLayout.LayoutParams swipeRefreshLayoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
+
+                                // Add the off-screen scrolling layout.
+                                swipeRefreshLayoutParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());
+                            } else {  // The app bar is not scrolled when it is displayed.
+                                // The swipe refresh layout must be manually moved below the app bar layout.
+                                swipeRefreshLayout.setPadding(0, appBarHeight, 0, 0);
+
+                                // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
+                                swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10 + appBarHeight, defaultProgressViewEndOffset + appBarHeight);
+                            }
+                        }
 
-        // Create a shortcut info builder.  The shortcut name becomes the shortcut ID.
-        ShortcutInfoCompat.Builder shortcutInfoBuilder = new ShortcutInfoCompat.Builder(this, shortcutNameString);
+                        // Show the banner ad in the free flavor.
+                        if (BuildConfig.FLAVOR.contentEquals("free")) {
+                            // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+                            View adView = findViewById(R.id.adview);
 
-        // Add the required fields to the shortcut info builder.
-        shortcutInfoBuilder.setIcon(favoriteIcon);
-        shortcutInfoBuilder.setIntent(shortcutIntent);
-        shortcutInfoBuilder.setShortLabel(shortcutNameString);
+                            // Reload the ad.  `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
+                            AdHelper.loadAd(adView, getApplicationContext(), activity, getString(R.string.ad_unit_id));
+                        }
 
-        // Request the pin.  `ShortcutManagerCompat` can be switched to `ShortcutManager` once API >= 26.
-        ShortcutManagerCompat.requestPinShortcut(this, shortcutInfoBuilder.build(), null);
-    }
+                        // Remove the `SYSTEM_UI` flags from the root frame layout.
+                        rootFrameLayout.setSystemUiVisibility(0);
+                    }
 
-    @Override
-    public void onDownloadImage(AppCompatDialogFragment dialogFragment, String imageUrl) {
-        // Download the image if it has an HTTP or HTTPS URI.
-        if (imageUrl.startsWith("http")) {
-            // Get a handle for the system `DOWNLOAD_SERVICE`.
-            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
-
-            // Parse `imageUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
-
-            // Pass cookies to download manager if cookies are enabled.  This is required to download images from websites that require a login.
-            // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
-            if (firstPartyCookiesEnabled) {
-                // Get the cookies for `imageUrl`.
-                String cookies = cookieManager.getCookie(imageUrl);
-
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
+                    // Consume the double-tap.
+                    return true;
+                } else { // Do not consume the double-tap because full screen browsing mode is disabled.
+                    return false;
+                }
             }
+        });
 
-            // Get the file name from `dialogFragment`.
-            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
-            String imageName = downloadImageNameEditText.getText().toString();
+        // Pass all touch events on the WebView through the double-tap gesture detector.
+        nestedScrollWebView.setOnTouchListener((View view, MotionEvent event) -> {
+            // Call `performClick()` on the view, which is required for accessibility.
+            view.performClick();
 
-            // Once we have `WRITE_EXTERNAL_STORAGE` permissions we can use `setDestinationInExternalPublicDir`.
-            if (Build.VERSION.SDK_INT >= 23) { // If API >= 23, set the download save in the the `DIRECTORY_DOWNLOADS` using `imageName`.
-                downloadRequest.setDestinationInExternalFilesDir(this, "/", imageName);
-            } else { // Only set the title using `imageName`.
-                downloadRequest.setTitle(imageName);
-            }
+            // Send the event to the gesture detector.
+            return doubleTapGestureDetector.onTouchEvent(event);
+        });
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+        // Register the WebView for a context menu.  This is used to see link targets and download images.
+        registerForContextMenu(nestedScrollWebView);
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(imageUrl);
+        // Allow the downloading of files.
+        nestedScrollWebView.setDownloadListener((String downloadUrl, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
+            // Define a formatted file size string.
+            String formattedFileSizeString;
+
+            // Process the content length if it contains data.
+            if (contentLength > 0) {  // The content length is greater than 0.
+                // Format the content length as a string.
+                formattedFileSizeString = NumberFormat.getInstance().format(contentLength) + " " + getString(R.string.bytes);
+            } else {  // The content length is not greater than 0.
+                // Set the formatted file size string to be `unknown size`.
+                formattedFileSizeString = getString(R.string.unknown_size);
+            }
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+            // Get the file name from the content disposition.
+            String fileNameString = PrepareSaveDialog.getFileNameFromHeaders(this, contentDisposition, mimetype, downloadUrl);
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+            // Prevent the dialog from displaying if the app window is not visible.
+            // The download listener continues to function even when the WebView is paused.  Attempting to display a dialog in that state leads to a crash.
+            while (!activity.getWindow().isActive()) {
+                try {
+                    // The window is not active.  Wait 1 second.
+                    wait(1000);
+                } catch (InterruptedException e) {
+                    // Do nothing.
+                }
+            }
 
-            // Initiate the download.
-            downloadManager.enqueue(downloadRequest);
-        } else {  // The image is not an HTTP or HTTPS URI.
-            Snackbar.make(mainWebView, R.string.cannot_download_image, Snackbar.LENGTH_INDEFINITE).show();
-        }
-    }
+            // Instantiate the save dialog.
+            DialogFragment saveDialogFragment = SaveWebpageDialog.saveWebpage(SaveWebpageDialog.SAVE_URL, downloadUrl, formattedFileSizeString, fileNameString, userAgent,
+                    nestedScrollWebView.getAcceptFirstPartyCookies());
 
-    @Override
-    public void onDownloadFile(AppCompatDialogFragment dialogFragment, String downloadUrl) {
-        // Download the file if it has an HTTP or HTTPS URI.
-        if (downloadUrl.startsWith("http")) {
+            // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
+            saveDialogFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
+        });
 
-            // Get a handle for the system `DOWNLOAD_SERVICE`.
-            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
+        // Update the find on page count.
+        nestedScrollWebView.setFindListener(new WebView.FindListener() {
+            // Get a handle for `findOnPageCountTextView`.
+            final TextView findOnPageCountTextView = findViewById(R.id.find_on_page_count_textview);
 
-            // Parse `downloadUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
+            @Override
+            public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
+                if ((isDoneCounting) && (numberOfMatches == 0)) {  // There are no matches.
+                    // Set `findOnPageCountTextView` to `0/0`.
+                    findOnPageCountTextView.setText(R.string.zero_of_zero);
+                } else if (isDoneCounting) {  // There are matches.
+                    // `activeMatchOrdinal` is zero-based.
+                    int activeMatch = activeMatchOrdinal + 1;
 
-            // Pass cookies to download manager if cookies are enabled.  This is required to download files from websites that require a login.
-            // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
-            if (firstPartyCookiesEnabled) {
-                // Get the cookies for `downloadUrl`.
-                String cookies = cookieManager.getCookie(downloadUrl);
+                    // Build the match string.
+                    String matchString = activeMatch + "/" + numberOfMatches;
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
+                    // Set `findOnPageCountTextView`.
+                    findOnPageCountTextView.setText(matchString);
+                }
             }
+        });
 
-            // Get the file name from `dialogFragment`.
-            EditText downloadFileNameEditText = dialogFragment.getDialog().findViewById(R.id.download_file_name);
-            String fileName = downloadFileNameEditText.getText().toString();
+        // Update the status of swipe to refresh based on the scroll position of the nested scroll WebView.  Also reinforce full screen browsing mode.
+        // On API < 23, `getViewTreeObserver().addOnScrollChangedListener()` must be used, but it is a little bit buggy and appears to get garbage collected from time to time.
+        if (Build.VERSION.SDK_INT >= 23) {
+            nestedScrollWebView.setOnScrollChangeListener((view, i, i1, i2, i3) -> {
+                if (nestedScrollWebView.getSwipeToRefresh()) {
+                    // Only enable swipe to refresh if the WebView is scrolled to the top.
+                    swipeRefreshLayout.setEnabled(nestedScrollWebView.getScrollY() == 0);
+                } else {
+                    // Disable swipe to refresh.
+                    swipeRefreshLayout.setEnabled(false);
+                }
 
-            // Once we have `WRITE_EXTERNAL_STORAGE` permissions we can use `setDestinationInExternalPublicDir`.
-            if (Build.VERSION.SDK_INT >= 23) { // If API >= 23, set the download location to `/sdcard/Android/data/com.stoutner.privacybrowser.standard/files` named `fileName`.
-                downloadRequest.setDestinationInExternalFilesDir(this, "/", fileName);
-            } else { // Only set the title using `fileName`.
-                downloadRequest.setTitle(fileName);
-            }
+                // Reinforce the system UI visibility flags if in full screen browsing mode.
+                // This hides the status and navigation bars, which are displayed if other elements are shown, like dialog boxes, the options menu, or the keyboard.
+                if (inFullScreenBrowsingMode) {
+                    /* Hide the system bars.
+                     * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                     * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                     * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                     * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                     */
+                    rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                            View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+                }
+            });
+        } else {
+            nestedScrollWebView.getViewTreeObserver().addOnScrollChangedListener(() -> {
+                if (nestedScrollWebView.getSwipeToRefresh()) {
+                    // Only enable swipe to refresh if the WebView is scrolled to the top.
+                    swipeRefreshLayout.setEnabled(nestedScrollWebView.getScrollY() == 0);
+                } else {
+                    // Disable swipe to refresh.
+                    swipeRefreshLayout.setEnabled(false);
+                }
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(downloadUrl);
+                // Reinforce the system UI visibility flags if in full screen browsing mode.
+                // This hides the status and navigation bars, which are displayed if other elements are shown, like dialog boxes, the options menu, or the keyboard.
+                if (inFullScreenBrowsingMode) {
+                    /* Hide the system bars.
+                     * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                     * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                     * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                     * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                     */
+                    rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                            View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+                }
+            });
+        }
+
+        // Set the web chrome client.
+        nestedScrollWebView.setWebChromeClient(new WebChromeClient() {
+            // Update the progress bar when a page is loading.
+            @Override
+            public void onProgressChanged(WebView view, int progress) {
+                // Update the progress bar.
+                progressBar.setProgress(progress);
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+                // Set the visibility of the progress bar.
+                if (progress < 100) {
+                    // Show the progress bar.
+                    progressBar.setVisibility(View.VISIBLE);
+                } else {
+                    // Hide the progress bar.
+                    progressBar.setVisibility(View.GONE);
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+                    //Stop the swipe to refresh indicator if it is running
+                    swipeRefreshLayout.setRefreshing(false);
 
-            // Initiate the download.
-            downloadManager.enqueue(downloadRequest);
-        } else {  // The download is not an HTTP or HTTPS URI.
-            Snackbar.make(mainWebView, R.string.cannot_download_file, Snackbar.LENGTH_INDEFINITE).show();
-        }
-    }
+                    // Make the current WebView visible.  If this is a new tab, the current WebView would have been created invisible in `webview_framelayout` to prevent a white background splash in night mode.
+                    nestedScrollWebView.setVisibility(View.VISIBLE);
+                }
+            }
 
-    @Override
-    public void onSaveBookmark(AppCompatDialogFragment dialogFragment, int selectedBookmarkDatabaseId) {
-        // Get handles for the views from `dialogFragment`.
-        EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
-        EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
-        RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
-
-        // Store the bookmark strings.
-        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
-
-        // Update the bookmark.
-        if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
-        } else {  // Update the bookmark using the `WebView` favorite icon.
-            // Convert the favorite icon to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
-            favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
-            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
-
-            //  Update the bookmark and the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
-        }
+            // Set the favorite icon when it changes.
+            @Override
+            public void onReceivedIcon(WebView view, Bitmap icon) {
+                // Only update the favorite icon if the website has finished loading.
+                if (progressBar.getVisibility() == View.GONE) {
+                    // Store the new favorite icon.
+                    nestedScrollWebView.setFavoriteOrDefaultIcon(icon);
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+                    // Get the current page position.
+                    int currentPosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+                    // Get the current tab.
+                    TabLayout.Tab tab = tabLayout.getTabAt(currentPosition);
 
-    @Override
-    public void onSaveBookmarkFolder(AppCompatDialogFragment dialogFragment, int selectedFolderDatabaseId) {
-        // Get handles for the views from `dialogFragment`.
-        EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
-        RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
-        RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
-        ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
+                    // Check to see if the tab has been populated.
+                    if (tab != null) {
+                        // Get the custom view from the tab.
+                        View tabView = tab.getCustomView();
 
-        // Get the new folder name.
-        String newFolderNameString = editFolderNameEditText.getText().toString();
+                        // Check to see if the custom tab view has been populated.
+                        if (tabView != null) {
+                            // Get the favorite icon image view from the tab.
+                            ImageView tabFavoriteIconImageView = tabView.findViewById(R.id.favorite_icon_imageview);
 
-        // Check if the favorite icon has changed.
-        if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
-            // Update the name in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
-        } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
-            // Get the new folder icon `Bitmap`.
-            Bitmap folderIconBitmap;
-            if (defaultFolderIconRadioButton.isChecked()) {
-                // Get the default folder icon and convert it to a `Bitmap`.
-                Drawable folderIconDrawable = folderIconImageView.getDrawable();
-                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
-                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
-            } else {  // Use the `WebView` favorite icon.
-                folderIconBitmap = favoriteIconBitmap;
+                            // Display the favorite icon in the tab.
+                            tabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
+                        }
+                    }
+                }
             }
 
-            // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
-            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
-            byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
-
-            // Update the folder icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, folderIconByteArray);
-        } else {  // The folder icon and the name have changed.
-            // Get the new folder icon `Bitmap`.
-            Bitmap folderIconBitmap;
-            if (defaultFolderIconRadioButton.isChecked()) {
-                // Get the default folder icon and convert it to a `Bitmap`.
-                Drawable folderIconDrawable = folderIconImageView.getDrawable();
-                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
-                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
-            } else {  // Use the `WebView` favorite icon.
-                folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
+            // Save a copy of the title when it changes.
+            @Override
+            public void onReceivedTitle(WebView view, String title) {
+                // Get the current page position.
+                int currentPosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
+
+                // Get the current tab.
+                TabLayout.Tab tab = tabLayout.getTabAt(currentPosition);
+
+                // Only populate the title text view if the tab has been fully created.
+                if (tab != null) {
+                    // Get the custom view from the tab.
+                    View tabView = tab.getCustomView();
+
+                    // Only populate the title text view if the tab view has been fully populated.
+                    if (tabView != null) {
+                        // Get the title text view from the tab.
+                        TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
+
+                        // Set the title according to the URL.
+                        if (title.equals("about:blank")) {
+                            // Set the title to indicate a new tab.
+                            tabTitleTextView.setText(R.string.new_tab);
+                        } else {
+                            // Set the title as the tab text.
+                            tabTitleTextView.setText(title);
+                        }
+                    }
+                }
             }
 
-            // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
-            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
-            byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+            // Enter full screen video.
+            @Override
+            public void onShowCustomView(View video, CustomViewCallback callback) {
+                // Set the full screen video flag.
+                displayingFullScreenVideo = true;
 
-            // Update the folder name and icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
-        }
+                // Pause the ad if this is the free flavor.
+                if (BuildConfig.FLAVOR.contentEquals("free")) {
+                    // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+                    View adView = findViewById(R.id.adview);
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+                    // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
+                    AdHelper.pauseAd(adView);
+                }
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+                // Hide the keyboard.
+                inputMethodManager.hideSoftInputFromWindow(nestedScrollWebView.getWindowToken(), 0);
 
-    @Override
-    public void onHttpAuthenticationCancel() {
-        // Cancel the `HttpAuthHandler`.
-        httpAuthHandler.cancel();
-    }
+                // Hide the main content relative layout.
+                mainContentRelativeLayout.setVisibility(View.GONE);
 
-    @Override
-    public void onHttpAuthenticationProceed(AppCompatDialogFragment dialogFragment) {
-        // Get handles for the `EditTexts`.
-        EditText usernameEditText = dialogFragment.getDialog().findViewById(R.id.http_authentication_username);
-        EditText passwordEditText = dialogFragment.getDialog().findViewById(R.id.http_authentication_password);
+                /* Hide the system bars.
+                 * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                 * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                 * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                 * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                 */
+                rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                        View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
 
-        // Proceed with the HTTP authentication.
-        httpAuthHandler.proceed(usernameEditText.getText().toString(), passwordEditText.getText().toString());
-    }
+                // Disable the sliding drawers.
+                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 
-    public void viewSslCertificate(View view) {
-        // Show the `ViewSslCertificateDialog` `AlertDialog` and name this instance `@string/view_ssl_certificate`.
-        DialogFragment viewSslCertificateDialogFragment = new ViewSslCertificateDialog();
-        viewSslCertificateDialogFragment.show(getFragmentManager(), getString(R.string.view_ssl_certificate));
-    }
+                // Add the video view to the full screen video frame layout.
+                fullScreenVideoFrameLayout.addView(video);
 
-    @Override
-    public void onSslErrorCancel() {
-        sslErrorHandler.cancel();
-    }
+                // Show the full screen video frame layout.
+                fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
 
-    @Override
-    public void onSslErrorProceed() {
-        sslErrorHandler.proceed();
-    }
+                // Disable the screen timeout while the video is playing.  YouTube does this automatically, but not all other videos do.
+                fullScreenVideoFrameLayout.setKeepScreenOn(true);
+            }
 
-    @Override
-    public void onSslMismatchBack() {
-        if (mainWebView.canGoBack()) {  // There is a back page in the history.
-            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-            navigatingHistory = true;
+            // Exit full screen video.
+            @Override
+            public void onHideCustomView() {
+                // Re-enable the screen timeout.
+                fullScreenVideoFrameLayout.setKeepScreenOn(false);
 
-            // Go back.
-            mainWebView.goBack();
-        } else {  // There are no pages to go back to.
-            // Load a blank page
-            loadUrl("");
-        }
-    }
+                // Unset the full screen video flag.
+                displayingFullScreenVideo = false;
 
-    @Override
-    public void onSslMismatchProceed() {
-        // Do not check the pinned SSL certificate for this domain again until the domain changes.
-        ignorePinnedSslCertificate = true;
-    }
+                // Remove all the views from the full screen video frame layout.
+                fullScreenVideoFrameLayout.removeAllViews();
 
-    @Override
-    public void onUrlHistoryEntrySelected(int moveBackOrForwardSteps) {
-        // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-        navigatingHistory = true;
+                // Hide the full screen video frame layout.
+                fullScreenVideoFrameLayout.setVisibility(View.GONE);
 
-        // Load the history entry.
-        mainWebView.goBackOrForward(moveBackOrForwardSteps);
-    }
+                // Enable the sliding drawers.
+                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 
-    @Override
-    public void onClearHistory() {
-        // Clear the history.
-        mainWebView.clearHistory();
-    }
+                // Show the main content relative layout.
+                mainContentRelativeLayout.setVisibility(View.VISIBLE);
 
-    // Override `onBackPressed` to handle the navigation drawer and `mainWebView`.
-    @Override
-    public void onBackPressed() {
-        if (drawerLayout.isDrawerVisible(GravityCompat.START)) {  // The navigation drawer is open.
-            // Close the navigation drawer.
-            drawerLayout.closeDrawer(GravityCompat.START);
-        } else if (drawerLayout.isDrawerVisible(GravityCompat.END)){  // The bookmarks drawer is open.
-            if (currentBookmarksFolder.isEmpty()) {  // The home folder is displayed.
-                // close the bookmarks drawer.
-                drawerLayout.closeDrawer(GravityCompat.END);
-            } else {  // A subfolder is displayed.
-                // Place the former parent folder in `currentFolder`.
-                currentBookmarksFolder = bookmarksDatabaseHelper.getParentFolder(currentBookmarksFolder);
+                // Apply the appropriate full screen mode flags.
+                if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
+                    // Hide the app bar if specified.
+                    if (hideAppBar) {
+                        // Hide the tab linear layout.
+                        tabsLinearLayout.setVisibility(View.GONE);
 
-                // Load the new folder.
-                loadBookmarksFolder();
-            }
+                        // Hide the action bar.
+                        actionBar.hide();
+                    }
 
-        } else if (mainWebView.canGoBack()) {  // There is at least one item in the `WebView` history.
-            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-            navigatingHistory = true;
+                    // Hide the banner ad in the free flavor.
+                    if (BuildConfig.FLAVOR.contentEquals("free")) {
+                        // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+                        View adView = findViewById(R.id.adview);
 
-            // Go back.
-            mainWebView.goBack();
-        } else {  // There isn't anything to do in Privacy Browser.
-            // Pass `onBackPressed()` to the system.
-            super.onBackPressed();
-        }
-    }
+                        // Hide the banner ad.
+                        AdHelper.hideAd(adView);
+                    }
 
-    private void loadUrlFromTextBox() throws UnsupportedEncodingException {
-        // Get the text from urlTextBox and convert it to a string.  trim() removes white spaces from the beginning and end of the string.
-        String unformattedUrlString = urlTextBox.getText().toString().trim();
+                    /* Hide the system bars.
+                     * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                     * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                     * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                     * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                     */
+                    rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                            View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+                } else {  // Switch to normal viewing mode.
+                    // Remove the `SYSTEM_UI` flags from the root frame layout.
+                    rootFrameLayout.setSystemUiVisibility(0);
+                }
 
-        // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
-        if ((Patterns.WEB_URL.matcher(unformattedUrlString).matches()) || (unformattedUrlString.startsWith("http://")) || (unformattedUrlString.startsWith("https://"))) {
-            // Add `http://` at the beginning if it is missing.  Otherwise the app will segfault.
-            if (!unformattedUrlString.startsWith("http")) {
-                unformattedUrlString = "http://" + unformattedUrlString;
+                // Reload the ad for the free flavor if not in full screen mode.
+                if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
+                    // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
+                    View adView = findViewById(R.id.adview);
+
+                    // Reload the ad.  `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
+                    AdHelper.loadAd(adView, getApplicationContext(), activity, getString(R.string.ad_unit_id));
+                }
             }
 
-            // Initialize `unformattedUrl`.
-            URL unformattedUrl = null;
+            // Upload files.
+            @Override
+            public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
+                // Show the file chooser if the device is running API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    // Store the file path callback.
+                    fileChooserCallback = filePathCallback;
 
-            // Convert `unformattedUrlString` to a `URL`, then to a `URI`, and then back to a `String`, which sanitizes the input and adds in any missing components.
-            try {
-                unformattedUrl = new URL(unformattedUrlString);
-            } catch (MalformedURLException e) {
-                e.printStackTrace();
-            }
+                    // Create an intent to open a chooser based on the file chooser parameters.
+                    Intent fileChooserIntent = fileChooserParams.createIntent();
 
-            // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if `.get` was called on a `null` value.
-            final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
-            final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
-            final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
-            final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
-            final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
+                    // Get a handle for the package manager.
+                    PackageManager packageManager = getPackageManager();
 
-            // Build the URI.
-            Uri.Builder formattedUri = new Uri.Builder();
-            formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
+                    // Check to see if the file chooser intent resolves to an installed package.
+                    if (fileChooserIntent.resolveActivity(packageManager) != null) {  // The file chooser intent is fine.
+                        // Start the file chooser intent.
+                        startActivityForResult(fileChooserIntent, BROWSE_FILE_UPLOAD_REQUEST_CODE);
+                    } else {  // The file chooser intent will cause a crash.
+                        // Create a generic intent to open a chooser.
+                        Intent genericFileChooserIntent = new Intent(Intent.ACTION_GET_CONTENT);
 
-            // Decode `formattedUri` as a `String` in `UTF-8`.
-            formattedUrlString = URLDecoder.decode(formattedUri.build().toString(), "UTF-8");
-        } else {
-            // Sanitize the search input and convert it to a search.
-            final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
+                        // Request an openable file.
+                        genericFileChooserIntent.addCategory(Intent.CATEGORY_OPENABLE);
 
-            // Add the base search URL.
-            formattedUrlString = searchURL + encodedUrlString;
-        }
+                        // Set the file type to everything.
+                        genericFileChooserIntent.setType("*/*");
 
-        // Clear the focus from the URL text box.  Otherwise, proximate typing in the box will retain the colorized formatting instead of being reset during refocus.
-        urlTextBox.clearFocus();
+                        // Start the generic file chooser intent.
+                        startActivityForResult(genericFileChooserIntent, BROWSE_FILE_UPLOAD_REQUEST_CODE);
+                    }
+                }
+                return true;
+            }
+        });
 
-        loadUrl(formattedUrlString);
-    }
+        nestedScrollWebView.setWebViewClient(new WebViewClient() {
+            // `shouldOverrideUrlLoading` makes this WebView the default handler for URLs inside the app, so that links are not kicked out to other apps.
+            // The deprecated `shouldOverrideUrlLoading` must be used until API >= 24.
+            @Override
+            public boolean shouldOverrideUrlLoading(WebView view, String url) {
+                // Sanitize the url.
+                url = sanitizeUrl(url);
 
+                // Handle the URL according to the type.
+                if (url.startsWith("http")) {  // Load the URL in Privacy Browser.
+                    // Load the URL.  By using `loadUrl()`, instead of `loadUrlFromBase()`, the Referer header will never be sent.
+                    loadUrl(nestedScrollWebView, url);
 
-    private void loadUrl(String url) {
-        // Apply any custom domain settings.
-        applyDomainSettings(url);
+                    // Returning true indicates that Privacy Browser is manually handling the loading of the URL.
+                    // Custom headers cannot be added if false is returned and the WebView handles the loading of the URL.
+                    return true;
+                } else if (url.startsWith("mailto:")) {  // Load the email address in an external email program.
+                    // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
+                    Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
 
-        // Load the URL.
-        mainWebView.loadUrl(url, customHeaders);
+                    // Parse the url and set it as the data for the intent.
+                    emailIntent.setData(Uri.parse(url));
 
-        // Set `urlIsLoading` to prevent changes in the user agent on websites with redirects from reloading the current website.
-        urlIsLoading = true;
-    }
+                    // Open the email program in a new task instead of as part of Privacy Browser.
+                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-    public void findPreviousOnPage(View view) {
-        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
-        mainWebView.findNext(false);
-    }
+                    try {
+                        // Make it so.
+                        startActivity(emailIntent);
+                    } catch (ActivityNotFoundException exception) {
+                        // Display a snackbar.
+                        Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
+                    }
 
-    public void findNextOnPage(View view) {
-        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
-        mainWebView.findNext(true);
-    }
 
-    public void closeFindOnPage(View view) {
-        // Delete the contents of `find_on_page_edittext`.
-        findOnPageEditText.setText(null);
+                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
+                    return true;
+                } else if (url.startsWith("tel:")) {  // Load the phone number in the dialer.
+                    // Open the dialer and load the phone number, but wait for the user to place the call.
+                    Intent dialIntent = new Intent(Intent.ACTION_DIAL);
 
-        // Clear the highlighted phrases.
-        mainWebView.clearMatches();
+                    // Add the phone number to the intent.
+                    dialIntent.setData(Uri.parse(url));
 
-        // Hide the Find on Page `RelativeLayout`.
-        findOnPageLinearLayout.setVisibility(View.GONE);
+                    // Open the dialer in a new task instead of as part of Privacy Browser.
+                    dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-        // Show the URL app bar.
-        supportAppBar.setVisibility(View.VISIBLE);
+                    try {
+                        // Make it so.
+                        startActivity(dialIntent);
+                    } catch (ActivityNotFoundException exception) {
+                        // Display a snackbar.
+                        Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
+                    }
 
-        // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
-        inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
-    }
+                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
+                    return true;
+                } else {  // Load a system chooser to select an app that can handle the URL.
+                    // Open an app that can handle the URL.
+                    Intent genericIntent = new Intent(Intent.ACTION_VIEW);
 
-    private void applyAppSettings() {
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                    // Add the URL to the intent.
+                    genericIntent.setData(Uri.parse(url));
 
-        // Store the values from the shared preferences in variables.
-        String homepageString = sharedPreferences.getString("homepage", "https://start.duckduckgo.com");
-        String torHomepageString = sharedPreferences.getString("tor_homepage", "https://3g2upl4pq6kufc4m.onion");
-        String torSearchString = sharedPreferences.getString("tor_search", "https://3g2upl4pq6kufc4m.onion/html/?q=");
-        String torSearchCustomURLString = sharedPreferences.getString("tor_search_custom_url", "");
-        String searchString = sharedPreferences.getString("search", "https://duckduckgo.com/html/?q=");
-        String searchCustomURLString = sharedPreferences.getString("search_custom_url", "");
-        adBlockerEnabled = sharedPreferences.getBoolean("block_ads", true);
-        incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
-        boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
-        boolean proxyThroughOrbot = sharedPreferences.getBoolean("proxy_through_orbot", false);
-        fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
-        hideSystemBarsOnFullscreen = sharedPreferences.getBoolean("hide_system_bars", false);
-        translucentNavigationBarOnFullscreen = sharedPreferences.getBoolean("translucent_navigation_bar", true);
-        swipeToRefreshEnabled = sharedPreferences.getBoolean("swipe_to_refresh", false);
-        displayWebpageImagesBoolean = sharedPreferences.getBoolean("display_webpage_images", true);
-
-        // Set the homepage, search, and proxy options.
-        if (proxyThroughOrbot) {  // Set the Tor options.
-            // Set `torHomepageString` as `homepage`.
-            homepage = torHomepageString;
-
-            // If formattedUrlString is null assign the homepage to it.
-            if (formattedUrlString == null) {
-                formattedUrlString = homepage;
-            }
+                    // List all apps that can handle the URL instead of just opening the first one.
+                    genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
 
-            // Set the search URL.
-            if (torSearchString.equals("Custom URL")) {  // Get the custom URL string.
-                searchURL = torSearchCustomURLString;
-            } else {  // Use the string from the pre-built list.
-                searchURL = torSearchString;
-            }
+                    // Open the app in a new task instead of as part of Privacy Browser.
+                    genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
+                    // Start the app or display a snackbar if no app is available to handle the URL.
+                    try {
+                        startActivity(genericIntent);
+                    } catch (ActivityNotFoundException exception) {
+                        Snackbar.make(nestedScrollWebView, getString(R.string.unrecognized_url) + "  " + url, Snackbar.LENGTH_SHORT).show();
+                    }
 
-            // Set the `appBar` background to indicate proxying through Orbot is enabled.  `this` refers to the context.
-            if (darkTheme) {
-                appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.dark_blue_30));
-            } else {
-                appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.blue_50));
+                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
+                    return true;
+                }
             }
 
-            // Display a message to the user if we are waiting on Orbot.
-            if (!orbotStatus.equals("ON")) {
-                // Set `waitingForOrbot`.
-                waitingForOrbot = true;
+            // Check requests against the block lists.  The deprecated `shouldInterceptRequest()` must be used until minimum API >= 21.
+            @Override
+            public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
+                // Check to see if the resource request is for the main URL.
+                if (url.equals(nestedScrollWebView.getCurrentUrl())) {
+                    // `return null` loads the resource request, which should never be blocked if it is the main URL.
+                    return null;
+                }
 
-                // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
-                mainWebView.loadData(waitingForOrbotHTMLString, "text/html", null);
-            }
-        } else {  // Set the non-Tor options.
-            // Set `homepageString` as `homepage`.
-            homepage = homepageString;
+                // Wait until the blocklists have been populated.  When Privacy Browser is being resumed after having the process killed in the background it will try to load the URLs immediately.
+                while (ultraPrivacy == null) {
+                    // The wait must be synchronized, which only lets one thread run on it at a time, or `java.lang.IllegalMonitorStateException` is thrown.
+                    synchronized (this) {
+                        try {
+                            // Check to see if the blocklists have been populated after 100 ms.
+                            wait(100);
+                        } catch (InterruptedException exception) {
+                            // Do nothing.
+                        }
+                    }
+                }
 
-            // If formattedUrlString is null assign the homepage to it.
-            if (formattedUrlString == null) {
-                formattedUrlString = homepage;
-            }
+                // Sanitize the URL.
+                url = sanitizeUrl(url);
 
-            // Set the search URL.
-            if (searchString.equals("Custom URL")) {  // Get the custom URL string.
-                searchURL = searchCustomURLString;
-            } else {  // Use the string from the pre-built list.
-                searchURL = searchString;
-            }
+                // Create an empty web resource response to be used if the resource request is blocked.
+                WebResourceResponse emptyWebResourceResponse = new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
 
-            // Reset the proxy to default.  The host is `""` and the port is `"0"`.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
+                // Reset the whitelist results tracker.
+                String[] whitelistResultStringArray = null;
 
-            // Set the default `appBar` background.  `this` refers to the context.
-            if (darkTheme) {
-                appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_900));
-            } else {
-                appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_100));
-            }
+                // Initialize the third party request tracker.
+                boolean isThirdPartyRequest = false;
 
-            // Reset `waitingForOrbot.
-            waitingForOrbot = false;
-        }
+                // Get the current URL.  `.getUrl()` throws an error because operations on the WebView cannot be made from this thread.
+                String currentBaseDomain = nestedScrollWebView.getCurrentDomainName();
 
-        // Set swipe to refresh.
-        swipeRefreshLayout.setEnabled(swipeToRefreshEnabled);
+                // Store a copy of the current domain for use in later requests.
+                String currentDomain = currentBaseDomain;
 
-        // Set Do Not Track status.
-        if (doNotTrackEnabled) {
-            customHeaders.put("DNT", "1");
-        } else {
-            customHeaders.remove("DNT");
-        }
+                // Nobody is happy when comparing null strings.
+                if ((currentBaseDomain != null) && (url != null)) {
+                    // Convert the request URL to a URI.
+                    Uri requestUri = Uri.parse(url);
 
-        // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
-        if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {
-            if (hideSystemBarsOnFullscreen) {  // Hide everything.
-                // Remove the translucent navigation setting if it is currently flagged.
-                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+                    // Get the request host name.
+                    String requestBaseDomain = requestUri.getHost();
 
-                // Remove the translucent status bar overlay.
-                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                    // Only check for third-party requests if the current base domain is not empty and the request domain is not null.
+                    if (!currentBaseDomain.isEmpty() && (requestBaseDomain != null)) {
+                        // Determine the current base domain.
+                        while (currentBaseDomain.indexOf(".", currentBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
+                            // Remove the first subdomain.
+                            currentBaseDomain = currentBaseDomain.substring(currentBaseDomain.indexOf(".") + 1);
+                        }
 
-                // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
-                drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
+                        // Determine the request base domain.
+                        while (requestBaseDomain.indexOf(".", requestBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
+                            // Remove the first subdomain.
+                            requestBaseDomain = requestBaseDomain.substring(requestBaseDomain.indexOf(".") + 1);
+                        }
 
-                /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-                 * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-                 * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically rehides them after they are shown.
-                 */
-                rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-            } else {  // Hide everything except the status and navigation bars.
-                // Add the translucent status flag if it is unset.
-                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
-
-                if (translucentNavigationBarOnFullscreen) {
-                    // Set the navigation bar to be translucent.
-                    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
-                } else {
-                    // Set the navigation bar to be black.
-                    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+                        // Update the third party request tracker.
+                        isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
+                    }
                 }
-            }
-        } else {  // Switch to normal viewing mode.
-            // Reset `inFullScreenBrowsingMode` to `false`.
-            inFullScreenBrowsingMode = false;
 
-            // Show the `appBar` if `findOnPageLinearLayout` is not visible.
-            if (findOnPageLinearLayout.getVisibility() == View.GONE) {
-                appBar.show();
-            }
+                // Get the current WebView page position.
+                int webViewPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
+
+                // Determine if the WebView is currently displayed.
+                boolean webViewDisplayed = (webViewPagePosition == tabLayout.getSelectedTabPosition());
+
+                // Block third-party requests if enabled.
+                if (isThirdPartyRequest && nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS)) {
+                    // Add the result to the resource requests.
+                    nestedScrollWebView.addResourceRequest(new String[]{BlocklistHelper.REQUEST_THIRD_PARTY, url});
+
+                    // Increment the blocked requests counters.
+                    nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                    nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS);
+
+                    // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                    if (webViewDisplayed) {
+                        // Updating the UI must be run from the UI thread.
+                        activity.runOnUiThread(() -> {
+                            // Update the menu item titles.
+                            navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                            // Update the options menu if it has been populated.
+                            if (optionsMenu != null) {
+                                optionsBlocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                optionsBlockAllThirdPartyRequestsMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " +
+                                        getString(R.string.block_all_third_party_requests));
+                            }
+                        });
+                    }
 
-            // Show the `BannerAd` in the free flavor.
-            if (BuildConfig.FLAVOR.contentEquals("free")) {
-                // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
-                BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
+                    // Return an empty web resource response.
+                    return emptyWebResourceResponse;
+                }
 
-                // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
-                adView = findViewById(R.id.adview);
-            }
+                // Check UltraList if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST)) {
+                    // Check the URL against UltraList.
+                    String[] ultraListResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, ultraList);
+
+                    // Process the UltraList results.
+                    if (ultraListResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched UltraLists's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {ultraListResults[0], ultraListResults[1], ultraListResults[2], ultraListResults[3], ultraListResults[4], ultraListResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.ULTRALIST);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsBlocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsUltraListMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.ULTRALIST) + " - " + getString(R.string.ultralist));
+                                }
+                            });
+                        }
 
-            // Remove the translucent navigation bar flag if it is set.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+                        // The resource request was blocked.  Return an empty web resource response.
+                        return emptyWebResourceResponse;
+                    } else if (ultraListResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)) {  // The resource request matched UltraList's whitelist.
+                        // Add a whitelist entry to the resource requests array.
+                        nestedScrollWebView.addResourceRequest(new String[] {ultraListResults[0], ultraListResults[1], ultraListResults[2], ultraListResults[3], ultraListResults[4], ultraListResults[5]});
 
-            // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
-            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
+                        return null;
+                    }
+                }
 
-            // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-            rootCoordinatorLayout.setSystemUiVisibility(0);
+                // Check UltraPrivacy if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY)) {
+                    // Check the URL against UltraPrivacy.
+                    String[] ultraPrivacyResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, ultraPrivacy);
+
+                    // Process the UltraPrivacy results.
+                    if (ultraPrivacyResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched UltraPrivacy's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {ultraPrivacyResults[0], ultraPrivacyResults[1], ultraPrivacyResults[2], ultraPrivacyResults[3], ultraPrivacyResults[4],
+                                ultraPrivacyResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.ULTRAPRIVACY);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsBlocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsUltraPrivacyMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.ULTRAPRIVACY) + " - " + getString(R.string.ultraprivacy));
+                                }
+                            });
+                        }
 
-            // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-            rootCoordinatorLayout.setFitsSystemWindows(true);
-        }
-    }
+                        // The resource request was blocked.  Return an empty web resource response.
+                        return emptyWebResourceResponse;
+                    } else if (ultraPrivacyResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)) {  // The resource request matched UltraPrivacy's whitelist.
+                        // Add a whitelist entry to the resource requests array.
+                        nestedScrollWebView.addResourceRequest(new String[] {ultraPrivacyResults[0], ultraPrivacyResults[1], ultraPrivacyResults[2], ultraPrivacyResults[3], ultraPrivacyResults[4],
+                                ultraPrivacyResults[5]});
 
-    // We have to use the deprecated `.getDrawable()` until the minimum API >= 21.
-    @SuppressWarnings("deprecation")
-    private void applyDomainSettings(String url) {
-        // Reset `navigatingHistory`.
-        navigatingHistory = false;
+                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
+                        return null;
+                    }
+                }
 
-        // Parse the URL into a URI.
-        Uri uri = Uri.parse(url);
+                // Check EasyList if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST)) {
+                    // Check the URL against EasyList.
+                    String[] easyListResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyList);
+
+                    // Process the EasyList results.
+                    if (easyListResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched EasyList's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {easyListResults[0], easyListResults[1], easyListResults[2], easyListResults[3], easyListResults[4], easyListResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.EASYLIST);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsBlocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsEasyListMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASYLIST) + " - " + getString(R.string.easylist));
+                                }
+                            });
+                        }
 
-        // Extract the domain from `uri`.
-        String hostName = uri.getHost();
-
-        // Initialize `loadingNewDomainName`.
-        boolean loadingNewDomainName;
-
-        // If either `hostName` or `currentDomainName` are `null`, run the options for loading a new domain name.
-        // The lint suggestion to simplify the `if` statement is incorrect, because `hostName.equals(currentDomainName)` can produce a `null object reference.`
-        //noinspection SimplifiableIfStatement
-        if ((hostName == null) || (currentDomainName == null)) {
-            loadingNewDomainName = true;
-        } else {  // Determine if `hostName` equals `currentDomainName`.
-            loadingNewDomainName = !hostName.equals(currentDomainName);
-        }
+                        // The resource request was blocked.  Return an empty web resource response.
+                        return emptyWebResourceResponse;
+                    } else if (easyListResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)) {  // The resource request matched EasyList's whitelist.
+                        // Update the whitelist result string array tracker.
+                        whitelistResultStringArray = new String[] {easyListResults[0], easyListResults[1], easyListResults[2], easyListResults[3], easyListResults[4], easyListResults[5]};
+                    }
+                }
 
-        // Only apply the domain settings if we are loading a new domain.  This allows the user to set temporary settings for JavaScript, cookies, DOM storage, etc.
-        if (loadingNewDomainName) {
-            // Set the new `hostname` as the `currentDomainName`.
-            currentDomainName = hostName;
+                // Check EasyPrivacy if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY)) {
+                    // Check the URL against EasyPrivacy.
+                    String[] easyPrivacyResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyPrivacy);
+
+                    // Process the EasyPrivacy results.
+                    if (easyPrivacyResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched EasyPrivacy's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {easyPrivacyResults[0], easyPrivacyResults[1], easyPrivacyResults[2], easyPrivacyResults[3], easyPrivacyResults[4],
+                                easyPrivacyResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.EASYPRIVACY);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsBlocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsEasyPrivacyMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASYPRIVACY) + " - " + getString(R.string.easyprivacy));
+                                }
+                            });
+                        }
 
-            // Reset `ignorePinnedSslCertificate`.
-            ignorePinnedSslCertificate = false;
+                        // The resource request was blocked.  Return an empty web resource response.
+                        return emptyWebResourceResponse;
+                    } else if (easyPrivacyResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)) {  // The resource request matched EasyPrivacy's whitelist.
+                        // Update the whitelist result string array tracker.
+                        whitelistResultStringArray = new String[] {easyPrivacyResults[0], easyPrivacyResults[1], easyPrivacyResults[2], easyPrivacyResults[3], easyPrivacyResults[4], easyPrivacyResults[5]};
+                    }
+                }
 
-            // Reset `favoriteIconBitmap` and display it in the `appbar`.
-            favoriteIconBitmap = favoriteIconDefaultBitmap;
-            favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(favoriteIconBitmap, 64, 64, true));
+                // Check Fanboy’s Annoyance List if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST)) {
+                    // Check the URL against Fanboy's Annoyance List.
+                    String[] fanboysAnnoyanceListResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList);
+
+                    // Process the Fanboy's Annoyance List results.
+                    if (fanboysAnnoyanceListResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched Fanboy's Annoyance List's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {fanboysAnnoyanceListResults[0], fanboysAnnoyanceListResults[1], fanboysAnnoyanceListResults[2], fanboysAnnoyanceListResults[3],
+                                fanboysAnnoyanceListResults[4], fanboysAnnoyanceListResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsBlocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsFanboysAnnoyanceListMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " +
+                                            getString(R.string.fanboys_annoyance_list));
+                                }
+                            });
+                        }
 
-            // Initialize the database handler.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
-            // The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
-            DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
+                        // The resource request was blocked.  Return an empty web resource response.
+                        return emptyWebResourceResponse;
+                    } else if (fanboysAnnoyanceListResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)){  // The resource request matched Fanboy's Annoyance List's whitelist.
+                        // Update the whitelist result string array tracker.
+                        whitelistResultStringArray = new String[] {fanboysAnnoyanceListResults[0], fanboysAnnoyanceListResults[1], fanboysAnnoyanceListResults[2], fanboysAnnoyanceListResults[3],
+                                fanboysAnnoyanceListResults[4], fanboysAnnoyanceListResults[5]};
+                    }
+                } else if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST)) {  // Only check Fanboy’s Social Blocking List if Fanboy’s Annoyance List is disabled.
+                    // Check the URL against Fanboy's Annoyance List.
+                    String[] fanboysSocialListResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, fanboysSocialList);
+
+                    // Process the Fanboy's Social Blocking List results.
+                    if (fanboysSocialListResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched Fanboy's Social Blocking List's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {fanboysSocialListResults[0], fanboysSocialListResults[1], fanboysSocialListResults[2], fanboysSocialListResults[3],
+                                fanboysSocialListResults[4], fanboysSocialListResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsBlocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsFanboysSocialBlockingListMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " +
+                                            getString(R.string.fanboys_social_blocking_list));
+                                }
+                            });
+                        }
 
-            // Get a full cursor from `domainsDatabaseHelper`.
-            Cursor domainNameCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
+                        // The resource request was blocked.  Return an empty web resource response.
+                        return emptyWebResourceResponse;
+                    } else if (fanboysSocialListResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)) {  // The resource request matched Fanboy's Social Blocking List's whitelist.
+                        // Update the whitelist result string array tracker.
+                        whitelistResultStringArray = new String[] {fanboysSocialListResults[0], fanboysSocialListResults[1], fanboysSocialListResults[2], fanboysSocialListResults[3],
+                                fanboysSocialListResults[4], fanboysSocialListResults[5]};
+                    }
+                }
 
-            // Initialize `domainSettingsSet`.
-            Set<String> domainSettingsSet = new HashSet<>();
+                // Add the request to the log because it hasn't been processed by any of the previous checks.
+                if (whitelistResultStringArray != null) {  // The request was processed by a whitelist.
+                    nestedScrollWebView.addResourceRequest(whitelistResultStringArray);
+                } else {  // The request didn't match any blocklist entry.  Log it as a default request.
+                    nestedScrollWebView.addResourceRequest(new String[]{BlocklistHelper.REQUEST_DEFAULT, url});
+                }
 
-            // Get the domain name column index.
-            int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
+                // The resource request has not been blocked.  `return null` loads the requested resource.
+                return null;
+            }
 
-            // Populate `domainSettingsSet`.
-            for (int i = 0; i < domainNameCursor.getCount(); i++) {
-                // Move `domainsCursor` to the current row.
-                domainNameCursor.moveToPosition(i);
+            // Handle HTTP authentication requests.
+            @Override
+            public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
+                // Store the handler.
+                nestedScrollWebView.setHttpAuthHandler(handler);
 
-                // Store the domain name in `domainSettingsSet`.
-                domainSettingsSet.add(domainNameCursor.getString(domainNameColumnIndex));
+                // Instantiate an HTTP authentication dialog.
+                DialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm, nestedScrollWebView.getWebViewFragmentId());
+
+                // Show the HTTP authentication dialog.
+                httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
             }
 
-            // Close `domainNameCursor.
-            domainNameCursor.close();
+            @Override
+            public void onPageStarted(WebView view, String url, Bitmap favicon) {
+                // Get the preferences.
+                boolean scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
 
-            // Initialize variables to track if domain settings will be applied and, if so, under which name.
-            domainSettingsApplied = false;
-            String domainNameInDatabase = null;
+                // Set the top padding of the swipe refresh layout according to the app bar scrolling preference.  This can't be done in `appAppSettings()` because the app bar is not yet populated there.
+                if (scrollAppBar || (inFullScreenBrowsingMode && hideAppBar)) {
+                    // No padding is needed because it will automatically be placed below the app bar layout due to the scrolling layout behavior.
+                    swipeRefreshLayout.setPadding(0, 0, 0, 0);
 
-            // Check the hostname.
-            if (domainSettingsSet.contains(hostName)) {
-                domainSettingsApplied = true;
-                domainNameInDatabase = hostName;
-            }
+                    // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
+                    swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10, defaultProgressViewEndOffset);
+                } else {
+                    // Get the app bar layout height.  This can't be done in `applyAppSettings()` because the app bar is not yet populated there.
+                    appBarHeight = appBarLayout.getHeight();
 
-            // If `hostName` is not `null`, check all the subdomains of `hostName` against wildcard domains in `domainCursor`.
-            if (hostName != null) {
-                while (hostName.contains(".") && !domainSettingsApplied) {  // Stop checking if we run out of  `.` or if we already know that `domainSettingsApplied` is `true`.
-                    if (domainSettingsSet.contains("*." + hostName)) {  // Check the host name prepended by `*.`.
-                        domainSettingsApplied = true;
-                        domainNameInDatabase = "*." + hostName;
-                    }
+                    // The swipe refresh layout must be manually moved below the app bar layout.
+                    swipeRefreshLayout.setPadding(0, appBarHeight, 0, 0);
 
-                    // Strip out the lowest subdomain of `host`.
-                    hostName = hostName.substring(hostName.indexOf(".") + 1);
+                    // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
+                    swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10 + appBarHeight, defaultProgressViewEndOffset + appBarHeight);
                 }
-            }
 
-            // Get a handle for the shared preference.  `this` references the current context.
-            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // Reset the list of resource requests.
+                nestedScrollWebView.clearResourceRequests();
 
-            // Store the general preference information.
-            String defaultFontSizeString = sharedPreferences.getString("default_font_size", "100");
-            String defaultUserAgentString = sharedPreferences.getString("user_agent", "PrivacyBrowser/1.0");
-            String defaultCustomUserAgentString = sharedPreferences.getString("custom_user_agent", "PrivacyBrowser/1.0");
-            nightMode = sharedPreferences.getBoolean("night_mode", false);
+                // Reset the requests counters.
+                nestedScrollWebView.resetRequestsCounters();
 
-            if (domainSettingsApplied) {  // The url we are loading has custom domain settings.
-                // Get a cursor for the current host and move it to the first position.
-                Cursor currentHostDomainSettingsCursor = domainsDatabaseHelper.getCursorForDomainName(domainNameInDatabase);
-                currentHostDomainSettingsCursor.moveToFirst();
+                // Get the current page position.
+                int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-                // Get the settings from the cursor.
-                domainSettingsDatabaseId = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper._ID)));
-                javaScriptEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_JAVASCRIPT)) == 1);
-                firstPartyCookiesEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES)) == 1);
-                thirdPartyCookiesEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES)) == 1);
-                domStorageEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)) == 1);
-                saveFormDataEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)) == 1);
-                String userAgentString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.USER_AGENT));
-                int fontSize = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE));
-                displayWebpageImagesInt = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES));
-                int nightModeInt = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.NIGHT_MODE));
-                pinnedDomainSslCertificate = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.PINNED_SSL_CERTIFICATE)) == 1);
-                pinnedDomainSslIssuedToCNameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_COMMON_NAME));
-                pinnedDomainSslIssuedToONameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATION));
-                pinnedDomainSslIssuedToUNameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATIONAL_UNIT));
-                pinnedDomainSslIssuedByCNameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_COMMON_NAME));
-                pinnedDomainSslIssuedByONameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATION));
-                pinnedDomainSslIssuedByUNameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATIONAL_UNIT));
-
-                // Set `nightMode` according to `nightModeInt`.  If `nightModeInt` is `DomainsDatabaseHelper.NIGHT_MODE_SYSTEM_DEFAULT` the current setting from `sharedPreferences` will be used.
-                switch (nightModeInt) {
-                    case DomainsDatabaseHelper.NIGHT_MODE_ENABLED:
-                        nightMode = true;
-                        break;
+                // Update the URL text bar if the page is currently selected and the URL edit text is not currently being edited.
+                if ((tabLayout.getSelectedTabPosition() == currentPagePosition) && !urlEditText.hasFocus()) {
+                    // Display the formatted URL text.
+                    urlEditText.setText(url);
 
-                    case DomainsDatabaseHelper.NIGHT_MODE_DISABLED:
-                        nightMode = false;
-                        break;
-                }
+                    // Apply text highlighting to `urlTextBox`.
+                    highlightUrlText();
 
-                // Set `javaScriptEnabled` to be `true` if `night_mode` is `true`.
-                if (nightMode) {
-                    javaScriptEnabled = true;
+                    // Hide the keyboard.
+                    inputMethodManager.hideSoftInputFromWindow(nestedScrollWebView.getWindowToken(), 0);
                 }
 
-                // Set the pinned SSL certificate start date to `null` if the saved date `long` is 0.
-                if (currentHostDomainSettingsCursor.getLong(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_START_DATE)) == 0) {
-                    pinnedDomainSslStartDate = null;
-                } else {
-                    pinnedDomainSslStartDate = new Date(currentHostDomainSettingsCursor.getLong(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_START_DATE)));
-                }
+                // Reset the list of host IP addresses.
+                nestedScrollWebView.clearCurrentIpAddresses();
 
-                // Set the pinned SSL certificate end date to `null` if the saved date `long` is 0.
-                if (currentHostDomainSettingsCursor.getLong(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_END_DATE)) == 0) {
-                    pinnedDomainSslEndDate = null;
-                } else {
-                    pinnedDomainSslEndDate = new Date(currentHostDomainSettingsCursor.getLong(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_END_DATE)));
-                }
+                // Get a URI for the current URL.
+                Uri currentUri = Uri.parse(url);
 
-                // Close `currentHostDomainSettingsCursor`.
-                currentHostDomainSettingsCursor.close();
+                // Get the IP addresses for the host.
+                new GetHostIpAddresses(activity, getSupportFragmentManager(), nestedScrollWebView).execute(currentUri.getHost());
 
-                // Apply the domain settings.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
-                mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
+                // Replace Refresh with Stop if the options menu has been created.  (The first WebView typically begins loading before the menu items are instantiated.)
+                if (optionsMenu != null) {
+                    // Set the title.
+                    optionsRefreshMenuItem.setTitle(R.string.stop);
 
-                // Apply the font size.
-                if (fontSize == 0) {  // Apply the default font size.
-                    mainWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
-                } else {  // Apply the specified font size.
-                    mainWebView.getSettings().setTextZoom(fontSize);
-                }
+                    // Get the app bar and theme preferences.
+                    boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean(getString(R.string.display_additional_app_bar_icons_key), false);
 
-                // Set third-party cookies status if API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
+                    // If the icon is displayed in the AppBar, set it according to the theme.
+                    if (displayAdditionalAppBarIcons) {
+                        // Get the current theme status.
+                        int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
+
+                        // Set the stop icon according to the theme.
+                        if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+                            optionsRefreshMenuItem.setIcon(R.drawable.close_blue_day);
+                        } else {
+                            optionsRefreshMenuItem.setIcon(R.drawable.close_blue_night);
+                        }
+                    }
                 }
+            }
 
-                // Only set the user agent if the webpage is not currently loading.  Otherwise, changing the user agent on redirects can cause the original website to reload.
-                // <https://redmine.stoutner.com/issues/160>
-                if (!urlIsLoading) {
-                    switch (userAgentString) {
-                        case "System default user agent":
-                            // Set the user agent according to the system default.
-                            switch (defaultUserAgentString) {
-                                case "WebView default user agent":
-                                    // Set the user agent to `""`, which uses the default value.
-                                    mainWebView.getSettings().setUserAgentString("");
-                                    break;
-
-                                case "Custom user agent":
-                                    // Set the custom user agent.
-                                    mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
-                                    break;
-
-                                default:
-                                    // Use the selected user agent.
-                                    mainWebView.getSettings().setUserAgentString(defaultUserAgentString);
-                            }
-                            break;
+            @Override
+            public void onPageFinished(WebView view, String url) {
+                // Flush any cookies to persistent storage.  The cookie manager has become very lazy about flushing cookies in recent versions.
+                if (nestedScrollWebView.getAcceptFirstPartyCookies() && Build.VERSION.SDK_INT >= 21) {
+                    CookieManager.getInstance().flush();
+                }
 
-                        case "WebView default user agent":
-                            // Set the user agent to `""`, which uses the default value.
-                            mainWebView.getSettings().setUserAgentString("");
-                            break;
+                // Update the Refresh menu item if the options menu has been created.
+                if (optionsMenu != null) {
+                    // Reset the Refresh title.
+                    optionsRefreshMenuItem.setTitle(R.string.refresh);
 
-                        default:
-                            // Use the selected user agent.
-                            mainWebView.getSettings().setUserAgentString(userAgentString);
-                    }
+                    // Get the app bar and theme preferences.
+                    boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean(getString(R.string.display_additional_app_bar_icons_key), false);
 
-                    // Store the applied user agent string.
-                    appliedUserAgentString = mainWebView.getSettings().getUserAgentString();
-                }
+                    // If the icon is displayed in the app bar, reset it according to the theme.
+                    if (displayAdditionalAppBarIcons) {
+                        // Get the current theme status.
+                        int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 
-                // Set a green background on `urlTextBox` to indicate that custom domain settings are being used.  We have to use the deprecated `.getDrawable()` until the minimum API >= 21.
-                if (darkTheme) {
-                    urlAppBarRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_dark_blue));
-                } else {
-                    urlAppBarRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_light_green));
-                }
-            } else {  // The URL we are loading does not have custom domain settings.  Load the defaults.
-                // Store the values from `sharedPreferences` in variables.
-                javaScriptEnabled = sharedPreferences.getBoolean("javascript_enabled", false);
-                firstPartyCookiesEnabled = sharedPreferences.getBoolean("first_party_cookies_enabled", false);
-                thirdPartyCookiesEnabled = sharedPreferences.getBoolean("third_party_cookies_enabled", false);
-                domStorageEnabled = sharedPreferences.getBoolean("dom_storage_enabled", false);
-                saveFormDataEnabled = sharedPreferences.getBoolean("save_form_data_enabled", false);
-
-                // Set `javaScriptEnabled` to be `true` if `night_mode` is `true`.
-                if (nightMode) {
-                    javaScriptEnabled = true;
+                        // Set the icon according to the theme.
+                        if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
+                            optionsRefreshMenuItem.setIcon(R.drawable.refresh_enabled_day);
+                        } else {
+                            optionsRefreshMenuItem.setIcon(R.drawable.refresh_enabled_night);
+                        }
+                    }
                 }
 
-                // Apply the default settings.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
-                mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
-                mainWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
-
-                // Reset the pinned SSL certificate information.
-                domainSettingsDatabaseId = -1;
-                pinnedDomainSslCertificate = false;
-                pinnedDomainSslIssuedToCNameString = "";
-                pinnedDomainSslIssuedToONameString = "";
-                pinnedDomainSslIssuedToUNameString = "";
-                pinnedDomainSslIssuedByCNameString = "";
-                pinnedDomainSslIssuedByONameString = "";
-                pinnedDomainSslIssuedByUNameString = "";
-                pinnedDomainSslStartDate = null;
-                pinnedDomainSslEndDate = null;
+                // Clear the cache, history, and logcat if Incognito Mode is enabled.
+                if (incognitoModeEnabled) {
+                    // Clear the cache.  `true` includes disk files.
+                    nestedScrollWebView.clearCache(true);
 
-                // Set third-party cookies status if API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
-                }
+                    // Clear the back/forward history.
+                    nestedScrollWebView.clearHistory();
 
-                // Only set the user agent if the webpage is not currently loading.  Otherwise, changing the user agent on redirects can cause the original website to reload.
-                // <https://redmine.stoutner.com/issues/160>
-                if (!urlIsLoading) {
-                    switch (defaultUserAgentString) {
-                        case "WebView default user agent":
-                            // Set the user agent to `""`, which uses the default value.
-                            mainWebView.getSettings().setUserAgentString("");
-                            break;
+                    // Manually delete cache folders.
+                    try {
+                        // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
+                        // which links to `/data/data/com.stoutner.privacybrowser.standard`.
+                        String privateDataDirectoryString = getApplicationInfo().dataDir;
 
-                        case "Custom user agent":
-                            // Set the custom user agent.
-                            mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
-                            break;
+                        // Delete the main cache directory.
+                        Runtime.getRuntime().exec("rm -rf " + privateDataDirectoryString + "/cache");
 
-                        default:
-                            // Use the selected user agent.
-                            mainWebView.getSettings().setUserAgentString(defaultUserAgentString);
+                        // Delete the secondary `Service Worker` cache directory.
+                        // A `String[]` must be used because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
+                        Runtime.getRuntime().exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
+                    } catch (IOException exception) {
+                        // Do nothing if an error is thrown.
                     }
 
-                    // Store the applied user agent string.
-                    appliedUserAgentString = mainWebView.getSettings().getUserAgentString();
+                    // Clear the logcat.
+                    try {
+                        // Clear the logcat.  `-c` clears the logcat.  `-b all` clears all the buffers (instead of just crash, main, and system).
+                        Runtime.getRuntime().exec("logcat -b all -c");
+                    } catch (IOException exception) {
+                        // Do nothing.
+                    }
                 }
 
-                // Set a transparent background on `urlTextBox`.  We have to use the deprecated `.getDrawable()` until the minimum API >= 21.
-                urlAppBarRelativeLayout.setBackgroundDrawable(getResources().getDrawable(R.color.transparent));
-            }
+                // Get the current page position.
+                int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-            // Close `domainsDatabaseHelper`.
-            domainsDatabaseHelper.close();
+                // Get the current URL from the nested scroll WebView.  This is more accurate than using the URL passed into the method, which is sometimes not the final one.
+                String currentUrl = nestedScrollWebView.getUrl();
 
-            // Remove the `onTheFlyDisplayImagesSet` flag and set the display webpage images mode.  `true` indicates that custom domain settings are applied.
-            onTheFlyDisplayImagesSet = false;
-            setDisplayWebpageImages();
+                // Get the current tab.
+                TabLayout.Tab tab = tabLayout.getTabAt(currentPagePosition);
 
-            // Update the privacy icons, but only if `mainMenu` has already been populated.
-            if (mainMenu != null) {
-                updatePrivacyIcons(true);
-            }
-        }
-    }
+                // Update the URL text bar if the page is currently selected and the user is not currently typing in the URL edit text.
+                // Crash records show that, in some crazy way, it is possible for the current URL to be blank at this point.
+                // Probably some sort of race condition when Privacy Browser is being resumed.
+                if ((tabLayout.getSelectedTabPosition() == currentPagePosition) && !urlEditText.hasFocus() && (currentUrl != null)) {
+                    // Check to see if the URL is `about:blank`.
+                    if (currentUrl.equals("about:blank")) {  // The WebView is blank.
+                        // Display the hint in the URL edit text.
+                        urlEditText.setText("");
 
-    private void setDisplayWebpageImages() {
-        if (!onTheFlyDisplayImagesSet) {
-            if (domainSettingsApplied) {  // Custom domain settings are applied.
-                switch (displayWebpageImagesInt) {
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImagesBoolean);
-                        break;
+                        // Request focus for the URL text box.
+                        urlEditText.requestFocus();
 
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(true);
-                        break;
+                        // Display the keyboard.
+                        inputMethodManager.showSoftInput(urlEditText, 0);
 
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(false);
-                        break;
-                }
-            } else {  // Default settings are applied.
-                mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImagesBoolean);
-            }
-        }
-    }
+                        // Apply the domain settings.  This clears any settings from the previous domain.
+                        applyDomainSettings(nestedScrollWebView, "", true, false, false);
 
-    private void updatePrivacyIcons(boolean runInvalidateOptionsMenu) {
-        // Get handles for the icons.
-        MenuItem privacyIconMenuItem = mainMenu.findItem(R.id.toggle_javascript);
-        MenuItem firstPartyCookiesIconMenuItem = mainMenu.findItem(R.id.toggle_first_party_cookies);
-        MenuItem domStorageIconMenuItem = mainMenu.findItem(R.id.toggle_dom_storage);
-        MenuItem formDataIconMenuItem = mainMenu.findItem(R.id.toggle_save_form_data);
-
-        // Update `privacyIcon`.
-        if (javaScriptEnabled) {  // JavaScript is enabled.
-            privacyIconMenuItem.setIcon(R.drawable.javascript_enabled);
-        } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled but cookies are enabled.
-            privacyIconMenuItem.setIcon(R.drawable.warning);
-        } else {  // All the dangerous features are disabled.
-            privacyIconMenuItem.setIcon(R.drawable.privacy_mode);
-        }
+                        // Only populate the title text view if the tab has been fully created.
+                        if (tab != null) {
+                            // Get the custom view from the tab.
+                            View tabView = tab.getCustomView();
 
-        // Update `firstPartyCookiesIcon`.
-        if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
-            firstPartyCookiesIconMenuItem.setIcon(R.drawable.cookies_enabled);
-        } else {  // First-party cookies are disabled.
-            if (darkTheme) {
-                firstPartyCookiesIconMenuItem.setIcon(R.drawable.cookies_disabled_dark);
-            } else {
-                firstPartyCookiesIconMenuItem.setIcon(R.drawable.cookies_disabled_light);
-            }
-        }
+                            // Remove the incorrect warning below that the current tab view might be null.
+                            assert tabView != null;
 
-        // Update `domStorageIcon`.
-        if (javaScriptEnabled && domStorageEnabled) {  // Both JavaScript and DOM storage are enabled.
-            domStorageIconMenuItem.setIcon(R.drawable.dom_storage_enabled);
-        } else if (javaScriptEnabled) {  // JavaScript is enabled but DOM storage is disabled.
-            if (darkTheme) {
-                domStorageIconMenuItem.setIcon(R.drawable.dom_storage_disabled_dark);
-            } else {
-                domStorageIconMenuItem.setIcon(R.drawable.dom_storage_disabled_light);
-            }
-        } else {  // JavaScript is disabled, so DOM storage is ghosted.
-            if (darkTheme) {
-                domStorageIconMenuItem.setIcon(R.drawable.dom_storage_ghosted_dark);
-            } else {
-                domStorageIconMenuItem.setIcon(R.drawable.dom_storage_ghosted_light);
-            }
-        }
+                            // Get the title text view from the tab.
+                            TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
 
-        // Update `formDataIcon`.
-        if (saveFormDataEnabled) {  // Form data is enabled.
-            formDataIconMenuItem.setIcon(R.drawable.form_data_enabled);
-        } else {  // Form data is disabled.
-            if (darkTheme) {
-                formDataIconMenuItem.setIcon(R.drawable.form_data_disabled_dark);
-            } else {
-                formDataIconMenuItem.setIcon(R.drawable.form_data_disabled_light);
-            }
-        }
+                            // Set the title as the tab text.
+                            tabTitleTextView.setText(R.string.new_tab);
+                        }
+                    } else {  // The WebView has loaded a webpage.
+                        // Update the URL edit text if it is not currently being edited.
+                        if (!urlEditText.hasFocus()) {
+                            // Sanitize the current URL.  This removes unwanted URL elements that were added by redirects, so that they won't be included if the URL is shared.
+                            String sanitizedUrl = sanitizeUrl(currentUrl);
 
-        // `invalidateOptionsMenu` calls `onPrepareOptionsMenu()` and redraws the icons in the `AppBar`.
-        if (runInvalidateOptionsMenu) {
-            invalidateOptionsMenu();
-        }
-    }
+                            // Display the final URL.  Getting the URL from the WebView instead of using the one provided by `onPageFinished()` makes websites like YouTube function correctly.
+                            urlEditText.setText(sanitizedUrl);
 
-    private void highlightUrlText() {
-        String urlString = urlTextBox.getText().toString();
+                            // Apply text highlighting to the URL.
+                            highlightUrlText();
+                        }
 
-        if (urlString.startsWith("http://")) {  // Highlight the protocol of connections that are not encrypted.
-            urlTextBox.getText().setSpan(redColorSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
-        } else if (urlString.startsWith("https://")) {  // De-emphasize the protocol of connections that are encrypted.
-            urlTextBox.getText().setSpan(initialGrayColorSpan, 0, 8, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
-        }
+                        // Only populate the title text view if the tab has been fully created.
+                        if (tab != null) {
+                            // Get the custom view from the tab.
+                            View tabView = tab.getCustomView();
 
-        // Get the index of the `/` immediately after the domain name.
-        int endOfDomainName = urlString.indexOf("/", (urlString.indexOf("//") + 2));
+                            // Remove the incorrect warning below that the current tab view might be null.
+                            assert tabView != null;
 
-        // De-emphasize the text after the domain name.
-        if (endOfDomainName > 0) {
-            urlTextBox.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
-        }
-    }
+                            // Get the title text view from the tab.
+                            TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
 
-    private void loadBookmarksFolder() {
-        // Update `bookmarksCursor` with the contents of the bookmarks database for the current folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+                            // Set the title as the tab text.  Sometimes `onReceivedTitle()` is not called, especially when navigating history.
+                            tabTitleTextView.setText(nestedScrollWebView.getTitle());
+                        }
+                    }
+                }
+            }
 
-        // Populate the bookmarks cursor adapter.  `this` specifies the `Context`.  `false` disables `autoRequery`.
-        bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
+            // Handle SSL Certificate errors.
             @Override
-            public View newView(Context context, Cursor cursor, ViewGroup parent) {
-                // Inflate the individual item layout.  `false` does not attach it to the root.
-                return getLayoutInflater().inflate(R.layout.bookmarks_drawer_item_linearlayout, parent, false);
+            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
+                // Get the current website SSL certificate.
+                SslCertificate currentWebsiteSslCertificate = error.getCertificate();
+
+                // Extract the individual pieces of information from the current website SSL certificate.
+                String currentWebsiteIssuedToCName = currentWebsiteSslCertificate.getIssuedTo().getCName();
+                String currentWebsiteIssuedToOName = currentWebsiteSslCertificate.getIssuedTo().getOName();
+                String currentWebsiteIssuedToUName = currentWebsiteSslCertificate.getIssuedTo().getUName();
+                String currentWebsiteIssuedByCName = currentWebsiteSslCertificate.getIssuedBy().getCName();
+                String currentWebsiteIssuedByOName = currentWebsiteSslCertificate.getIssuedBy().getOName();
+                String currentWebsiteIssuedByUName = currentWebsiteSslCertificate.getIssuedBy().getUName();
+                Date currentWebsiteSslStartDate = currentWebsiteSslCertificate.getValidNotBeforeDate();
+                Date currentWebsiteSslEndDate = currentWebsiteSslCertificate.getValidNotAfterDate();
+
+                // Proceed to the website if the current SSL website certificate matches the pinned domain certificate.
+                if (nestedScrollWebView.hasPinnedSslCertificate()) {
+                    // Get the pinned SSL certificate.
+                    ArrayList<Object> pinnedSslCertificateArrayList = nestedScrollWebView.getPinnedSslCertificate();
+
+                    // Extract the arrays from the array list.
+                    String[] pinnedSslCertificateStringArray = (String[]) pinnedSslCertificateArrayList.get(0);
+                    Date[] pinnedSslCertificateDateArray = (Date[]) pinnedSslCertificateArrayList.get(1);
+
+                    // Check if the current SSL certificate matches the pinned certificate.
+                    if (currentWebsiteIssuedToCName.equals(pinnedSslCertificateStringArray[0]) && currentWebsiteIssuedToOName.equals(pinnedSslCertificateStringArray[1]) &&
+                        currentWebsiteIssuedToUName.equals(pinnedSslCertificateStringArray[2]) && currentWebsiteIssuedByCName.equals(pinnedSslCertificateStringArray[3]) &&
+                        currentWebsiteIssuedByOName.equals(pinnedSslCertificateStringArray[4]) && currentWebsiteIssuedByUName.equals(pinnedSslCertificateStringArray[5]) &&
+                        currentWebsiteSslStartDate.equals(pinnedSslCertificateDateArray[0]) && currentWebsiteSslEndDate.equals(pinnedSslCertificateDateArray[1])) {
+
+                        // An SSL certificate is pinned and matches the current domain certificate.  Proceed to the website without displaying an error.
+                        handler.proceed();
+                    }
+                } else {  // Either there isn't a pinned SSL certificate or it doesn't match the current website certificate.
+                    // Store the SSL error handler.
+                    nestedScrollWebView.setSslErrorHandler(handler);
+
+                    // Prevent the dialog from displaying if the app window is not visible.
+                    // The SSL error handler continues to function even when the WebView is paused.  Attempting to display a dialog in that state leads to a crash.
+                    while (!activity.getWindow().isActive()) {
+                        try {
+                            // The window is not active.  Wait 1 second.
+                            wait(1000);
+                        } catch (InterruptedException e) {
+                            // Do nothing.
+                        }
+                    }
+
+                    // Instantiate an SSL certificate error alert dialog.
+                    DialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error, nestedScrollWebView.getWebViewFragmentId());
+
+                    // Show the SSL certificate error dialog.
+                    sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
+                }
             }
+        });
 
-            @Override
-            public void bindView(View view, Context context, Cursor cursor) {
-                // Get handles for the views.
-                ImageView bookmarkFavoriteIcon = view.findViewById(R.id.bookmark_favorite_icon);
-                TextView bookmarkNameTextView = view.findViewById(R.id.bookmark_name);
+        // Check to see if the state is being restored.
+        if (restoringState) {  // The state is being restored.
+            // Resume the nested scroll WebView JavaScript timers.
+            nestedScrollWebView.resumeTimers();
+        } else if (pageNumber == 0) {  // The first page is being loaded.
+            // Set this nested scroll WebView as the current WebView.
+            currentWebView = nestedScrollWebView;
 
-                // Get the favorite icon byte array from the `Cursor`.
-                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
+            // Initialize the URL to load string.
+            String urlToLoadString;
 
-                // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
-                Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
+            // Get the intent that started the app.
+            Intent launchingIntent = getIntent();
 
-                // Display the bitmap in `bookmarkFavoriteIcon`.
-                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
+            // Reset the intent.  This prevents a duplicate tab from being created on restart.
+            setIntent(new Intent());
 
-                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
-                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
-                bookmarkNameTextView.setText(bookmarkNameString);
+            // Get the information from the intent.
+            String launchingIntentAction = launchingIntent.getAction();
+            Uri launchingIntentUriData = launchingIntent.getData();
+            String launchingIntentStringExtra = launchingIntent.getStringExtra(Intent.EXTRA_TEXT);
 
-                // Make the font bold for folders.
-                if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
-                    bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
-                } else {  // Reset the font to default for normal bookmarks.
-                    bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
+            // Parse the launching intent URL.
+            if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {  // The intent contains a search string.
+                // Create an encoded URL string.
+                String encodedUrlString;
+
+                // Sanitize the search input and convert it to a search.
+                try {
+                    encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                } catch (UnsupportedEncodingException exception) {
+                    encodedUrlString = "";
                 }
+
+                // Store the web search as the URL to load.
+                urlToLoadString = searchURL + encodedUrlString;
+            } else if (launchingIntentUriData != null) {  // The launching intent contains a URL formatted as a URI.
+                // Store the URI as a URL.
+                urlToLoadString = launchingIntentUriData.toString();
+            } else if (launchingIntentStringExtra != null) {  // The launching intent contains text that might be a URL.
+                // Store the URL.
+                urlToLoadString = launchingIntentStringExtra;
+            } else if (!url.equals("")) {  // The activity has been restarted.
+                // Load the saved URL.
+                urlToLoadString = url;
+            } else {  // The is no URL in the intent.
+                // Store the homepage to be loaded.
+                urlToLoadString = sharedPreferences.getString("homepage", getString(R.string.homepage_default_value));
             }
-        };
 
-        // Populate the `ListView` with the adapter.
-        bookmarksListView.setAdapter(bookmarksCursorAdapter);
+            // Load the website if not waiting for the proxy.
+            if (waitingForProxy) {  // Store the URL to be loaded in the Nested Scroll WebView.
+                nestedScrollWebView.setWaitingForProxyUrlString(urlToLoadString);
+            } else {  // Load the URL.
+                loadUrl(nestedScrollWebView, urlToLoadString);
+            }
 
-        // Set the bookmarks drawer title.
-        if (currentBookmarksFolder.isEmpty()) {
-            bookmarksTitleTextView.setText(R.string.bookmarks);
-        } else {
-            bookmarksTitleTextView.setText(currentBookmarksFolder);
+            // Reset the intent.  This prevents a duplicate tab from being created on a subsequent restart if loading an link from a new intent on restart.
+            // For example, this prevents a duplicate tab if a link is loaded from the Guide after changing the theme in the guide and then changing the theme again in the main activity.
+            setIntent(new Intent());
+        } else {  // This is not the first tab.
+            // Load the URL.
+            loadUrl(nestedScrollWebView, url);
+
+            // Set the focus and display the keyboard if the URL is blank.
+            if (url.equals("")) {
+                // Request focus for the URL text box.
+                urlEditText.requestFocus();
+
+                // Create a display keyboard handler.
+                Handler displayKeyboardHandler = new Handler();
+
+                // Create a display keyboard runnable.
+                Runnable displayKeyboardRunnable = () -> {
+                    // Display the keyboard.
+                    inputMethodManager.showSoftInput(urlEditText, 0);
+                };
+
+                // Display the keyboard after 100 milliseconds, which leaves enough time for the tab to transition.
+                displayKeyboardHandler.postDelayed(displayKeyboardRunnable, 100);
+            }
         }
     }
-}
+}
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