]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/activities/MainWebViewActivity.java
Add a preference to control opening of intents in new tabs. https://redmine.stoutner...
[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
index c2d65ec51447b4a49224aafaef2d192684e25bcc..ed0259f21c2805179ec03f36b85c41e19d86e89c 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2015-2018 Soren Stoutner <soren@stoutner.com>.
+ * Copyright © 2015-2019 Soren Stoutner <soren@stoutner.com>.
  *
  * Download cookie code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
  *
@@ -24,7 +24,6 @@ package com.stoutner.privacybrowser.activities;
 import android.Manifest;
 import android.annotation.SuppressLint;
 import android.app.Activity;
-import android.app.DialogFragment;
 import android.app.DownloadManager;
 import android.app.SearchManager;
 import android.content.ActivityNotFoundException;
@@ -53,30 +52,10 @@ import android.os.Handler;
 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.app.ActivityCompat;
-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.view.ContextMenu;
 import android.view.GestureDetector;
@@ -92,9 +71,9 @@ 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;
@@ -111,27 +90,52 @@ import android.widget.RadioButton;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.ActionBarDrawerToggle;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+import androidx.core.view.GravityCompat;
+import androidx.drawerlayout.widget.DrawerLayout;
+import androidx.fragment.app.DialogFragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
+import androidx.viewpager.widget.ViewPager;
+
+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.adapters.WebViewPagerAdapter;
+import com.stoutner.privacybrowser.asynctasks.GetHostIpAddresses;
 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.DownloadFileDialog;
 import com.stoutner.privacybrowser.dialogs.DownloadImageDialog;
 import com.stoutner.privacybrowser.dialogs.DownloadLocationPermissionDialog;
 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
-import com.stoutner.privacybrowser.dialogs.PinnedSslCertificateMismatchDialog;
+import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
+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.CheckPinnedMismatchHelper;
 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.views.NestedScrollWebView;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
@@ -152,123 +156,26 @@ import java.util.Set;
 
 // AppCompatActivity from android.support.v7.app.AppCompatActivity must be used to have access to the SupportActionBar until the minimum API is >= 21.
 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
-        CreateHomeScreenShortcutDialog.CreateHomeScreenShortcutListener, DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener,
-        DownloadLocationPermissionDialog.DownloadLocationPermissionDialogListener, EditBookmarkDialog.EditBookmarkListener, EditBookmarkFolderDialog.EditBookmarkFolderListener,
-        HttpAuthenticationDialog.HttpAuthenticationListener, NavigationView.OnNavigationItemSelectedListener, PinnedSslCertificateMismatchDialog.PinnedSslCertificateMismatchListener,
-        SslCertificateErrorDialog.SslCertificateErrorListener, UrlHistoryDialog.UrlHistoryListener {
-
-    // `darkTheme` is public static so it can be accessed from everywhere.
-    public static boolean darkTheme;
-
-    // `allowScreenshots` is public static so it can be accessed from everywhere.  It is also used in `onCreate()`.
-    public static boolean allowScreenshots;
-
-    // `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()`, `loadUrlFromTextBox()`, and `applyProxyThroughOrbot()`.
-    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;
+        DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener, DownloadLocationPermissionDialog.DownloadLocationPermissionDialogListener, EditBookmarkDialog.EditBookmarkListener,
+        EditBookmarkFolderDialog.EditBookmarkFolderListener, NavigationView.OnNavigationItemSelectedListener, WebViewTabFragment.NewTabListener {
 
     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
     public static String orbotStatus;
 
-    // `webViewTitle` is public static so it can be accessed from `CreateBookmarkDialog` and `CreateHomeScreenShortcutDialog`.  It is also used in `onCreate()`.
-    public static String webViewTitle;
-
-    // `appliedUserAgentString` is public static so it can be accessed from `ViewSourceActivity`.  It is also used in `applyDomainSettings()`.
-    public static String appliedUserAgentString;
-
-    // `reloadOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`
-    public static boolean reloadOnRestart;
+    // The WebView pager adapter is accessed from `HttpAuthenticationDialog`, `PinnedMismatchDialog`, and `SslCertificateErrorDialog`.  It is also used in `onCreate()`, `onResume()`, and `addTab()`.
+    public static WebViewPagerAdapter webViewPagerAdapter;
 
-    // `reloadUrlOnRestart` is public static so it can be accessed from `SettingsFragment` and `BookmarksActivity`.  It is also used in `onRestart()`.
+    // The load URL on restart variables are public static so they can be accessed from `BookmarksActivity`.  They are used in `onRestart()`.
     public static boolean loadUrlOnRestart;
+    public static String urlToLoadOnRestart;
 
     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
     public static boolean restartFromBookmarksActivity;
 
-    // The block list versions are public static so they can be accessed from `AboutTabFragment`.  They are also used in `onCreate()`.
-    public static String easyListVersion;
-    public static String easyPrivacyVersion;
-    public static String fanboysAnnoyanceVersion;
-    public static String fanboysSocialVersion;
-    public static String ultraPrivacyVersion;
-
-    // The request items are public static so they can be accessed by `BlockListHelper`, `RequestsArrayAdapter`, and `ViewRequestsDialog`.  They are also used in `onCreate()` and `onPrepareOptionsMenu()`.
-    public static List<String[]> resourceRequests;
-    public static String[] whiteListResultStringArray;
-    private int blockedRequests;
-    private int easyListBlockedRequests;
-    private int easyPrivacyBlockedRequests;
-    private int fanboysAnnoyanceListBlockedRequests;
-    private int fanboysSocialBlockingListBlockedRequests;
-    private int ultraPrivacyBlockedRequests;
-    private int thirdPartyBlockedRequests;
-
-    public final static int REQUEST_DISPOSITION = 0;
-    public final static int REQUEST_URL = 1;
-    public final static int REQUEST_BLOCKLIST = 2;
-    public final static int REQUEST_SUBLIST = 3;
-    public final static int REQUEST_BLOCKLIST_ENTRIES = 4;
-    public final static int REQUEST_BLOCKLIST_ORIGINAL_ENTRY = 5;
-
-    public final static int REQUEST_DEFAULT = 0;
-    public final static int REQUEST_ALLOWED = 1;
-    public final static int REQUEST_THIRD_PARTY = 2;
-    public final static int REQUEST_BLOCKED = 3;
-
-    public final static int MAIN_WHITELIST = 1;
-    public final static int FINAL_WHITELIST = 2;
-    public final static int DOMAIN_WHITELIST = 3;
-    public final static int DOMAIN_INITIAL_WHITELIST = 4;
-    public final static int DOMAIN_FINAL_WHITELIST = 5;
-    public final static int THIRD_PARTY_WHITELIST = 6;
-    public final static int THIRD_PARTY_DOMAIN_WHITELIST = 7;
-    public final static int THIRD_PARTY_DOMAIN_INITIAL_WHITELIST = 8;
-
-    public final static int MAIN_BLACKLIST = 9;
-    public final static int INITIAL_BLACKLIST = 10;
-    public final static int FINAL_BLACKLIST = 11;
-    public final static int DOMAIN_BLACKLIST = 12;
-    public final static int DOMAIN_INITIAL_BLACKLIST = 13;
-    public final static int DOMAIN_FINAL_BLACKLIST = 14;
-    public final static int DOMAIN_REGULAR_EXPRESSION_BLACKLIST = 15;
-    public final static int THIRD_PARTY_BLACKLIST = 16;
-    public final static int THIRD_PARTY_INITIAL_BLACKLIST = 17;
-    public final static int THIRD_PARTY_DOMAIN_BLACKLIST = 18;
-    public final static int THIRD_PARTY_DOMAIN_INITIAL_BLACKLIST = 19;
-    public final static int THIRD_PARTY_REGULAR_EXPRESSION_BLACKLIST = 20;
-    public final static int THIRD_PARTY_DOMAIN_REGULAR_EXPRESSION_BLACKLIST = 21;
-    public final static int REGULAR_EXPRESSION_BLACKLIST = 22;
-
-    // `blockAllThirdPartyRequests` is public static so it can be accessed from `RequestsActivity`.
-    // It is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`
-    public static boolean blockAllThirdPartyRequests;
-
     // `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;
-
     // 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;
@@ -278,115 +185,45 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
 
 
-    // `appBar` is used in `onCreate()`, `onOptionsItemSelected()`, `closeFindOnPage()`, `applyAppSettings()`, and `applyProxyThroughOrbot()`.
-    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 `applyProxyThroughOrbot()`.
-    private WebView mainWebView;
-
-    // `fullScreenVideoFrameLayout` is used in `onCreate()` and `onConfigurationChanged()`.
-    private FrameLayout fullScreenVideoFrameLayout;
-
-    // `swipeRefreshLayout` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, 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 current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
+    // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, `applyProxyThroughOrbot()`, 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()`.  It can be removed once the minimum API >= 26.
-    private boolean saveFormDataEnabled;
-
-    // `nightMode` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and  `applyDomainSettings()`.
-    private boolean nightMode;
-
-    // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyProxyThroughOrbot()`.
-    private String homepage;
-
-    // `searchURL` is used in `loadURLFromTextBox()` and `applyProxyThroughOrbot()`.
+    // The search URL is set in `applyProxyThroughOrbot()` and used in `onCreate()`, `onNewIntent()`, `loadURLFromTextBox()`, and `initializeWebView()`.
     private String searchURL;
 
-    // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
-    private Menu mainMenu;
-
-    // `refreshMenuItem` is used in `onCreate()` and `onCreateOptionsMenu()`.
-    private MenuItem refreshMenuItem;
+    // The options menu is set in `onCreateOptionsMenu()` and used in `onOptionsItemSelected()`, `updatePrivacyIcons()`, and `initializeWebView()`.
+    private Menu optionsMenu;
 
-    // The blocklist menu items are used in `onCreate()`, `onCreateOptionsMenu()`, and `onPrepareOptionsMenu()`.
-    private MenuItem blocklistsMenuItem;
-    private MenuItem easyListMenuItem;
-    private MenuItem easyPrivacyMenuItem;
-    private MenuItem fanboysAnnoyanceListMenuItem;
-    private MenuItem fanboysSocialBlockingListMenuItem;
-    private MenuItem ultraPrivacyMenuItem;
-    private MenuItem blockAllThirdPartyRequestsMenuItem;
-
-    // The blocklist variables are used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
-    private boolean easyListEnabled;
-    private boolean easyPrivacyEnabled;
-    private boolean fanboysAnnoyanceListEnabled;
-    private boolean fanboysSocialBlockingListEnabled;
-    private boolean ultraPrivacyEnabled;
+    // The blocklists are populated in `onCreate()` 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[]>> ultraPrivacy;
 
     // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
     private String webViewDefaultUserAgent;
 
-    // `defaultCustomUserAgentString` is used in `onPrepareOptionsMenu()` and `applyDomainSettings()`.
-    private String defaultCustomUserAgentString;
-
-    // `privacyBrowserRuntime` is used in `onCreate()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
-    private Runtime privacyBrowserRuntime;
-
     // `proxyThroughOrbot` is used in `onRestart()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxyThroughOrbot()`.
     private boolean proxyThroughOrbot;
 
-    // `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;
-
-    // `translucentNavigationBarOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
-    private boolean translucentNavigationBarOnFullscreen;
+    // The app bar trackers are set in `applyAppSettings()` and used in `initializeWebView()`.
+    private boolean hideAppBar;
+    private boolean scrollAppBar;
 
     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
     private boolean reapplyDomainSettingsOnRestart;
@@ -397,84 +234,29 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `displayingFullScreenVideo` is used in `onCreate()` and `onResume()`.
     private boolean displayingFullScreenVideo;
 
-    // `downloadWithExternalApp` is used in `onCreate()`, `onCreateContextMenu()`, and `applyDomainSettings()`.
-    private boolean downloadWithExternalApp;
-
-    // `currentDomainName` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onAddDomain()`, and `applyDomainSettings()`.
-    private String currentDomainName;
-
-    // `ignorePinnedSslCertificateForDomain` is used in `onCreate()`, `onSslMismatchProceed()`, and `applyDomainSettings()`.
-    private boolean ignorePinnedSslCertificate;
-
     // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
     private BroadcastReceiver orbotStatusBroadcastReceiver;
 
     // `waitingForOrbot` is used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
     private boolean waitingForOrbot;
 
-    // `domainSettingsApplied` is used in `prepareOptionsMenu()` and `applyDomainSettings()`.
-    private boolean domainSettingsApplied;
-
-    // `domainSettingsJavaScriptEnabled` is used in `onOptionsItemSelected()` and `applyDomainSettings()`.
-    private Boolean domainSettingsJavaScriptEnabled;
-
-    // `waitingForOrbotHtmlString` is used in `onCreate()` and `applyProxyThroughOrbot()`.
-    private String waitingForOrbotHtmlString;
-
-    // `privateDataDirectoryString` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`.
-    private String privateDataDirectoryString;
-
-    // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private LinearLayout findOnPageLinearLayout;
-
-    // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private EditText findOnPageEditText;
-
-    // `displayAdditionalAppBarIcons` is used in `onCreate()` and `onCreateOptionsMenu()`.
-    private boolean displayAdditionalAppBarIcons;
-
-    // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
-    private ActionBarDrawerToggle drawerToggle;
-
-    // `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;
 
-    // `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()`, `onCreateOptionsMenu()`, `loadUrl()`, and `applyDomainSettings()`.
-    private boolean urlIsLoading;
-
-    // `pinnedDomainSslCertificate` is used in `onCreate()` and `applyDomainSettings()`.
-    private boolean pinnedDomainSslCertificate;
+    // The drawer header padding variables are used in `onCreate()` and `onConfigurationChanged()`.
+    private int drawerHeaderPaddingLeftAndRight;
+    private int drawerHeaderPaddingTop;
+    private int drawerHeaderPaddingBottom;
 
     // `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 `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
     private Cursor bookmarksCursor;
 
@@ -487,7 +269,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
     private ValueCallback<Uri[]> fileChooserCallback;
 
-    // The download strings are used in `onCreate()` and `onRequestPermissionResult()`.
+    // The default progress view offsets are set in `onCreate()` and used in `initializeWebView()`.
+    private int defaultProgressViewStartOffset;
+    private int defaultProgressViewEndOffset;
+
+    // The swipe refresh layout top padding is used when exiting full screen browsing mode.  It is used in an inner class in `initializeWebView()`.
+    private int swipeRefreshLayoutPaddingTop;
+
+    // The download strings are used in `onCreate()`, `onRequestPermissionResult()` and `initializeWebView()`.
     private String downloadUrl;
     private String downloadContentDisposition;
     private long downloadContentLength;
@@ -495,27 +284,20 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `downloadImageUrl` is used in `onCreateContextMenu()` and `onRequestPermissionResult()`.
     private String downloadImageUrl;
 
-    // The user agent variables are used in `onCreate()` and `applyDomainSettings()`.
-    private ArrayAdapter<CharSequence> userAgentNamesArray;
-    private String[] userAgentDataArray;
-
-    // The request codes are used in `onCreate()`, `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, and `onRequestPermissionResult()`.
+    // The request codes are used in `onCreate()`, `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, `onRequestPermissionResult()`, and `initializeWebView()`.
     private final int DOWNLOAD_FILE_REQUEST_CODE = 1;
     private final int DOWNLOAD_IMAGE_REQUEST_CODE = 2;
 
     @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.
-    // Also, remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
-    @SuppressLint({"SetJavaScriptEnabled", "ClickableViewAccessibility"})
-    // Remove Android Studio's warning about deprecations.  We have to use the deprecated `getColor()` until API >= 23.
-    @SuppressWarnings("deprecation")
+    // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
+    @SuppressLint("ClickableViewAccessibility")
     protected void onCreate(Bundle savedInstanceState) {
         // Get a handle for the shared preferences.
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
         // Get the theme and screenshot preferences.
-        darkTheme = sharedPreferences.getBoolean("dark_theme", false);
-        allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
+        boolean allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
 
         // Disable screenshots if not allowed.
         if (!allowScreenshots) {
@@ -533,41 +315,48 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         super.onCreate(savedInstanceState);
 
         // Set the content view.
-        setContentView(R.layout.main_drawerlayout);
+        setContentView(R.layout.main_framelayout);
+
+        // Get a handle for the input method.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-        // Get a handle for `inputMethodManager`.
-        inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+        // Get a handle for the toolbar.
+        Toolbar toolbar = findViewById(R.id.toolbar);
 
-        // `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();
+        // Set the action bar.  `SupportActionBar` must be used until the minimum API is >= 21.
+        setSupportActionBar(toolbar);
 
-        // This is needed to get rid of the Android Studio warning that `appBar` might be null.
-        assert appBar != null;
+        // Get a handle for the action bar.
+        ActionBar actionBar = getSupportActionBar();
 
-        // 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);
+        // This is needed to get rid of the Android Studio warning that the action bar might be null.
+        assert actionBar != null;
+
+        // Add the custom layout, which shows the URL text bar.
+        actionBar.setCustomView(R.layout.url_app_bar);
+        actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
 
         // 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));
 
-        // Get a handle for `urlTextBox`.
-        urlTextBox = findViewById(R.id.url_edittext);
+        // Get handles for the URL views.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
         // Remove the formatting from `urlTextBar` when the user is editing the text.
-        urlTextBox.setOnFocusChangeListener((View v, boolean hasFocus) -> {
+        urlEditText.setOnFocusChangeListener((View v, boolean hasFocus) -> {
             if (hasFocus) {  // The user is editing the URL text box.
                 // Remove the highlighting.
-                urlTextBox.getText().removeSpan(redColorSpan);
-                urlTextBox.getText().removeSpan(initialGrayColorSpan);
-                urlTextBox.getText().removeSpan(finalGrayColorSpan);
+                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.
-                urlTextBox.setSelection(0);
+                urlEditText.setSelection(0);
 
                 // Reapply the highlighting.
                 highlightUrlText();
@@ -575,7 +364,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         });
 
         // Set the go button on the keyboard to load the URL in `urlTextBox`.
-        urlTextBox.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
+        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.
@@ -589,11 +378,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             }
         });
 
-        // Set `waitingForOrbotHTMLString`.
-        waitingForOrbotHtmlString = "<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>";
-
-        // Initialize `currentDomainName`, `orbotStatus`, and `waitingForOrbot`.
-        currentDomainName = "";
+        // Initialize the Orbot status and the waiting for Orbot trackers.
         orbotStatus = "unknown";
         waitingForOrbot = false;
 
@@ -606,11 +391,43 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // If Privacy Browser is waiting on Orbot, load the website now that Orbot is connected.
                 if (orbotStatus.equals("ON") && waitingForOrbot) {
-                    // Reset `waitingForOrbot`.
+                    // Reset the waiting for Orbot status.
                     waitingForOrbot = false;
 
-                    // Load `formattedUrlString
-                    loadUrl(formattedUrlString);
+                    // Get the intent that started the app.
+                    Intent launchingIntent = getIntent();
+
+                    // Get the information from the intent.
+                    String launchingIntentAction = launchingIntent.getAction();
+                    Uri launchingIntentUriData = launchingIntent.getData();
+
+                    // If the intent action is a web search, perform the search.
+                    if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {
+                        // 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 = "";
+                        }
+
+                        // Load the completed search URL.
+                        loadUrl(searchURL + encodedUrlString);
+                    } else if (launchingIntentUriData != null){  // Check to see if the intent contains a new URL.
+                        // Load the URL from the intent.
+                        loadUrl(launchingIntentUriData.toString());
+                    } else {  // The is no URL in the intent.
+                        // Select the homepage based on the proxy through Orbot status.
+                        if (proxyThroughOrbot) {
+                            // Load the Tor homepage.
+                            loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
+                        } else {
+                            // Load the normal homepage.
+                            loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
+                        }
+                    }
                 }
             }
         };
@@ -618,23 +435,119 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Register `orbotStatusBroadcastReceiver` on `this` context.
         this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
 
-        // 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);
+        // Instantiate the blocklist helper.
+        BlockListHelper blockListHelper = new BlockListHelper();
+
+        // Parse the block lists.
+        easyList = blockListHelper.parseBlockList(getAssets(), "blocklists/easylist.txt");
+        easyPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/easyprivacy.txt");
+        fanboysAnnoyanceList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-annoyance.txt");
+        fanboysSocialList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-social.txt");
+        ultraPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/ultraprivacy.txt");
+
+        // Get handles for views that need to be modified.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+        NavigationView navigationView = findViewById(R.id.navigationview);
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+        ViewPager webViewPager = findViewById(R.id.webviewpager);
+        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);
-        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);
+        EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
+
+        // Listen for touches on the navigation menu.
+        navigationView.setNavigationItemSelectedListener(this);
+
+        // Get handles for the navigation menu and the back and forward menu items.  The menu is zero-based.
+        Menu navigationMenu = navigationView.getMenu();
+        MenuItem navigationCloseTabMenuItem = navigationMenu.getItem(0);
+        MenuItem navigationBackMenuItem = navigationMenu.getItem(3);
+        MenuItem navigationForwardMenuItem = navigationMenu.getItem(4);
+        MenuItem navigationHistoryMenuItem = navigationMenu.getItem(5);
+        MenuItem navigationRequestsMenuItem = navigationMenu.getItem(6);
+
+        // Initialize the web view pager adapter.
+        webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
+
+        // Set the pager adapter on the web view pager.
+        webViewPager.setAdapter(webViewPagerAdapter);
+
+        // Store up to 100 tabs in memory.
+        webViewPager.setOffscreenPageLimit(100);
+
+        // 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.
+            }
+
+            @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 via swiping in the view pager or by creating a new tab.
+                if (tabLayout.getSelectedTabPosition() != position) {
+                    // Create a handler to select the tab.
+                    Handler selectTabHandler = new Handler();
+
+                    // Create a runnable select the new tab.
+                    Runnable selectTabRunnable = () -> {
+                        // 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();
+                    };
+
+                    // Select the tab layout after 100 milliseconds, which leaves enough time for a new tab to be created.
+                    selectTabHandler.postDelayed(selectTabRunnable, 100);
+                }
+            }
+
+            @Override
+            public void onPageScrollStateChanged(int state) {
+                // Do nothing.
+            }
+        });
+
+        // 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());
+            }
+
+            @Override
+            public void onTabUnselected(TabLayout.Tab tab) {
+                // Do nothing.
+            }
+
+            @Override
+            public void onTabReselected(TabLayout.Tab tab) {
+                // Instantiate the View SSL Certificate dialog.
+                DialogFragment viewSslCertificateDialogFragment = ViewSslCertificateDialog.displayDialog(currentWebView.getWebViewFragmentId());
+
+                // Display the View SSL Certificate dialog.
+                viewSslCertificateDialogFragment.show(getSupportFragmentManager(), getString(R.string.view_ssl_certificate));
+            }
+        });
+
+        // Add the first tab.
+        addTab(null);
 
         // 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.
+        // The deprecated `getResources().getDrawable()` must be used until the minimum API >= 21 and and `getResources().getColor()` must be used until the minimum API >= 23.
         if (darkTheme) {
             launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_dark));
             createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_dark));
@@ -649,11 +562,26 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // 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();
+
+            // 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();
+
             // Create an intent to launch the bookmarks activity.
             Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
 
-            // Include the current folder with the `Intent`.
-            bookmarksIntent.putExtra("Current Folder", currentBookmarksFolder);
+            // 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);
 
             // Make it so.
             startActivity(bookmarksIntent);
@@ -661,124 +589,20 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // Set the create new bookmark folder FAB to display an alert dialog.
         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));
+            // Create a create bookmark folder dialog.
+            DialogFragment createBookmarkFolderDialog = CreateBookmarkFolderDialog.createBookmarkFolder(currentWebView.getFavoriteOrDefaultIcon());
+
+            // Show the create bookmark folder dialog.
+            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
         });
 
         // Set the create new bookmark FAB to display an alert dialog.
         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));
-        });
-
-        // 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;
-
-                    if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
-                        // Hide the `appBar`.
-                        appBar.hide();
-
-                        // Hide the banner ad in the free flavor.
-                        if (BuildConfig.FLAVOR.contentEquals("free")) {
-                            // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-                            AdHelper.hideAd(findViewById(R.id.adview));
-                        }
-
-                        // 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 re-hides 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();
-
-                        // Show the `BannerAd` in the free flavor.
-                        if (BuildConfig.FLAVOR.contentEquals("free")) {
-                            // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-                            AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
-                        }
-
-                        // Remove the translucent navigation bar flag if it is set.
-                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
-
-                        // 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);
-
-                        // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                        rootCoordinatorLayout.setSystemUiVisibility(0);
-
-                        // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-                        rootCoordinatorLayout.setFitsSystemWindows(true);
-                    }
-
-                    // Consume the double-tap.
-                    return true;
-                } else { // Do not consume the double-tap because full screen browsing mode is disabled.
-                    return false;
-                }
-            }
-        });
-
-        // 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();
-
-            // Send the `event` to `gestureDetector`.
-            return gestureDetector.onTouchEvent(event);
-        });
-
-        // Update `findOnPageCountTextView`.
-        mainWebView.setFindListener(new WebView.FindListener() {
-            // Get a handle for `findOnPageCountTextView`.
-            final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
-
-            @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;
+            // Instantiate the create bookmark dialog.
+            DialogFragment createBookmarkDialog = CreateBookmarkDialog.createBookmark(currentWebView.getUrl(), currentWebView.getTitle(), currentWebView.getFavoriteOrDefaultIcon());
 
-                    // Build the match string.
-                    String matchString = activeMatch + "/" + numberOfMatches;
-
-                    // Set `findOnPageCountTextView`.
-                    findOnPageCountTextView.setText(matchString);
-                }
-            }
+            // Display the create bookmark dialog.
+            createBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.create_bookmark));
         });
 
         // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
@@ -795,16 +619,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             @Override
             public void afterTextChanged(Editable s) {
-                // Search for the text in `mainWebView`.
-                mainWebView.findAllAsync(findOnPageEditText.getText().toString());
+                // 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());
+                }
             }
         });
 
         // 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);
+                // Hide the soft keyboard.
+                inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
 
                 // Consume the event.
                 return true;
@@ -815,34 +641,25 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         });
 
         // Implement swipe to refresh.
-        swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
-        swipeRefreshLayout.setOnRefreshListener(() -> mainWebView.reload());
+        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
+
+        // Store the default progress view offsets for use later in `initializeWebView()`.
+        defaultProgressViewStartOffset = swipeRefreshLayout.getProgressViewStartOffset();
+        defaultProgressViewEndOffset = swipeRefreshLayout.getProgressViewEndOffset();
 
         // Set the swipe to refresh color according to the theme.
         if (darkTheme) {
-            swipeRefreshLayout.setColorSchemeResources(R.color.blue_600);
+            swipeRefreshLayout.setColorSchemeResources(R.color.blue_800);
             swipeRefreshLayout.setProgressBackgroundColorSchemeResource(R.color.gray_850);
         } else {
-            swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
+            swipeRefreshLayout.setColorSchemeResources(R.color.blue_500);
         }
 
         // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
         drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
         drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
 
-        // Listen for touches on the navigation menu.
-        final NavigationView navigationView = findViewById(R.id.navigationview);
-        navigationView.setNavigationItemSelectedListener(this);
-
-        // 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);
-        final MenuItem navigationRequestsMenuItem = navigationMenu.getItem(4);
-
-        // 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`.
+        // 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);
 
         // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
@@ -856,7 +673,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             int databaseID = (int) id;
 
             // Get the bookmark cursor for this ID and move it to the first row.
-            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
+            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseID);
             bookmarkCursor.moveToFirst();
 
             // Act upon the bookmark according to the type.
@@ -890,19 +707,31 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
                 // 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));
+                DialogFragment editBookmarkFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
+                editBookmarkFolderDialog.show(getSupportFragmentManager(), 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));
+                DialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
+                editBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.edit_bookmark));
             }
 
             // Consume the event.
             return true;
         });
 
-        // The drawer listener is used to update the navigation menu.
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
+
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
+
+        // Calculate the drawer header padding.  This is used to move the text in the drawer headers below any cutouts.
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
+
+        // The drawer listener is used to update the navigation menu.`
         drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
             @Override
             public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
@@ -919,3795 +748,4714 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             @Override
             public void onDrawerStateChanged(int newState) {
                 if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // A drawer is opening or closing.
-                    // Update the back, forward, history, and requests menu items.
-                    navigationBackMenuItem.setEnabled(mainWebView.canGoBack());
-                    navigationForwardMenuItem.setEnabled(mainWebView.canGoForward());
-                    navigationHistoryMenuItem.setEnabled((mainWebView.canGoBack() || mainWebView.canGoForward()));
-                    navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
+                    // Get handles for the drawer headers.
+                    TextView navigationHeaderTextView = findViewById(R.id.navigationText);
+                    TextView bookmarksHeaderTextView = findViewById(R.id.bookmarks_title_textview);
+
+                    // Apply the navigation header paddings if the view is not null (sometimes it is null if another activity has already started).  This moves the text in the header below any cutouts.
+                    if (navigationHeaderTextView != null) {
+                        navigationHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
+                    }
+
+                    // Apply the bookmarks header paddings if the view is not null (sometimes it is null if another activity has already started).  This moves the text in the header below any cutouts.
+                    if (bookmarksHeaderTextView != null) {
+                        bookmarksHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
+                    }
+
+                    // Update the navigation menu items.
+                    navigationCloseTabMenuItem.setEnabled(tabLayout.getTabCount() > 1);
+                    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(mainWebView.getWindowToken(), 0);
+                    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.
-                    urlTextBox.clearFocus();
-                    mainWebView.clearFocus();
+                    urlEditText.clearFocus();
+                    currentWebView.clearFocus();
                 }
             }
         });
 
-        // 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);
+        // 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);
 
-        // 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);
-                                    }
-                                };
+        // 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);
 
-                                // Displaying of `mainWebView` after 500 milliseconds.
-                                displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
-                            });
-                }
+        // 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);
 
-                // Update the progress bar.
-                progressBar.setProgress(progress);
+        // Get a handle for the WebView.
+        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
 
-                // 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);
+        // Store the default user agent.
+        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
 
-                    // 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);
-                    }
+        // Destroy the bare WebView.
+        bareWebView.destroy();
+    }
 
-                    //Stop the swipe to refresh indicator if it is running
-                    swipeRefreshLayout.setRefreshing(false);
-                }
-            }
+    @Override
+    protected void onNewIntent(Intent intent) {
+        // Get the information from the intent.
+        String intentAction = intent.getAction();
+        Uri intentUriData = intent.getData();
 
-            // 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;
+        // Only process the URI if it contains data.  If the user pressed the desktop icon after the app was already running the URI will be null.
+        if (intentUriData != null) {
+            // Sets the new intent as the activity intent, which replaces the one that originally started the app.
+            setIntent(intent);
 
-                    // Place the favorite icon in the appBar.
-                    favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
-                }
-            }
+            // Get the shared preferences.
+            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-            // 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;
+            if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {
+                // Add a new tab.
+                addTab(null);
             }
 
-            // Enter full screen video.
-            @Override
-            public void onShowCustomView(View view, CustomViewCallback callback) {
-                // Set the full screen video flag.
-                displayingFullScreenVideo = true;
-
-                // Pause the ad if this is the free flavor.
-                if (BuildConfig.FLAVOR.contentEquals("free")) {
-                    // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-                    AdHelper.pauseAd(findViewById(R.id.adview));
-                }
+            // Create a URL string.
+            String url;
 
-                // Remove the translucent overlays.
-                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            // If the intent action is a web search, perform the search.
+            if ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH)) {
+                // Create an encoded URL string.
+                String encodedUrlString;
 
-                // 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);
+                // Sanitize the search input and convert it to a search.
+                try {
+                    encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                } catch (UnsupportedEncodingException exception) {
+                    encodedUrlString = "";
+                }
 
-                /* 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 re-hides them after they are shown.
-                 */
-                rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+                // Add the base search URL.
+                url = searchURL + encodedUrlString;
+            } else {  // The intent should contain a URL.
+                // Set the intent data as the URL.
+                url = intentUriData.toString();
+            }
 
-                // Set `rootCoordinatorLayout` to fill the entire screen.
-                rootCoordinatorLayout.setFitsSystemWindows(false);
+            // Load the URL.
+            loadUrl(url);
 
-                // Disable the sliding drawers.
-                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
+            // Get a handle for the drawer layout.
+            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-                // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
-                fullScreenVideoFrameLayout.addView(view);
-                fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
+            // Close the navigation drawer if it is open.
+            if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
+                drawerLayout.closeDrawer(GravityCompat.START);
             }
 
-            // Exit full screen video.
-            @Override
-            public void onHideCustomView() {
-                // Unset the full screen video flag.
-                displayingFullScreenVideo = false;
-
-                // Hide `fullScreenVideoFrameLayout`.
-                fullScreenVideoFrameLayout.removeAllViews();
-                fullScreenVideoFrameLayout.setVisibility(View.GONE);
+            // Close the bookmarks drawer if it is open.
+            if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
+                drawerLayout.closeDrawer(GravityCompat.END);
+            }
 
-                // Enable the sliding drawers.
-                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
+            // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
+            currentWebView.requestFocus();
+        }
+    }
 
-                // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
-                if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
-                    if (hideSystemBarsOnFullscreen) {  // Hide everything.
-                        // Remove the translucent navigation setting if it is currently flagged.
-                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+    @Override
+    public void onRestart() {
+        // Run the default commands.
+        super.onRestart();
 
-                        // Remove the translucent status bar overlay.
-                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+        // Make sure Orbot is running if Privacy Browser is proxying through Orbot.
+        if (proxyThroughOrbot) {
+            // Request Orbot to start.  If Orbot is already running no hard will be caused by this request.
+            Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
 
-                        // 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);
+            // Send the intent to the Orbot package.
+            orbotIntent.setPackage("org.torproject.android");
 
-                        /* 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 re-hides 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.
-                        // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                        rootCoordinatorLayout.setSystemUiVisibility(0);
+            // Make it so.
+            sendBroadcast(orbotIntent);
+        }
 
-                        // Add the translucent status flag if it is unset.
-                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+        // Apply the app settings if returning from the Settings activity.
+        if (reapplyAppSettingsOnRestart) {
+            // Reset the reapply app settings on restart tracker.
+            reapplyAppSettingsOnRestart = false;
 
-                        if (translucentNavigationBarOnFullscreen) {
-                            // Set the navigation bar to be translucent.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
-                            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
-                        } else {
-                            // Set the navigation bar to be black.
-                            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
-                        }
-                    }
-                } else {  // Switch to normal viewing mode.
-                    // Show the `appBar` if `findOnPageLinearLayout` is not visible.
-                    if (findOnPageLinearLayout.getVisibility() == View.GONE) {
-                        appBar.show();
-                    }
+            // Apply the app settings.
+            applyAppSettings();
+        }
 
-                    // Show the `BannerAd` in the free flavor.
-                    if (BuildConfig.FLAVOR.contentEquals("free")) {
-                        // Initialize the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-                        AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getFragmentManager(), getString(R.string.google_app_id), getString(R.string.ad_unit_id));
-                    }
+        // Apply the domain settings if returning from the settings or domains activity.
+        if (reapplyDomainSettingsOnRestart) {
+            // Reset the reapply domain settings on restart tracker.
+            reapplyDomainSettingsOnRestart = false;
 
-                    // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                    rootCoordinatorLayout.setSystemUiVisibility(0);
+            // 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);
 
-                    // Remove the translucent navigation bar flag if it is set.
-                    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+                // Get the fragment view.
+                View fragmentView = webViewTabFragment.getView();
 
-                    // 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);
+                // 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);
 
-                    // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-                    rootCoordinatorLayout.setFitsSystemWindows(true);
-                }
+                    // Reset the current domain name so the domain settings will be reapplied.
+                    nestedScrollWebView.resetCurrentDomainName();
 
-                // Show the ad if this is the free flavor.
-                if (BuildConfig.FLAVOR.contentEquals("free")) {
-                    // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-                    AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
+                    // 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);
+                    }
                 }
             }
+        }
 
-            // 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;
-
-                    // Create an intent to open a chooser based ont the file chooser parameters.
-                    Intent fileChooserIntent = fileChooserParams.createIntent();
+        // Load the URL on restart (used when loading a bookmark).
+        if (loadUrlOnRestart) {
+            // Load the specified URL.
+            loadUrl(urlToLoadOnRestart);
 
-                    // Open the file chooser.  Currently only one `startActivityForResult` exists in this activity, so the request code, used to differentiate them, is simply `0`.
-                    startActivityForResult(fileChooserIntent, 0);
-                }
-                return true;
-            }
-        });
+            // Reset the load on restart tracker.
+            loadUrlOnRestart = false;
+        }
 
-        // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
-        registerForContextMenu(mainWebView);
+        // Update the bookmarks drawer if returning from the Bookmarks activity.
+        if (restartFromBookmarksActivity) {
+            // Get a handle for the drawer layout.
+            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-        // Allow the downloading of files.
-        mainWebView.setDownloadListener((String url, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
-            // Check if the download should be processed by an external app.
-            if (downloadWithExternalApp) {  // Download with an external app.
-                openUrlWithExternalApp(url);
-            } else {  // Download with Android's download manager.
-                // Check to see if the WRITE_EXTERNAL_STORAGE permission has already been granted.
-                if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission has not been granted.
-                    // The WRITE_EXTERNAL_STORAGE permission needs to be requested.
+            // Close the bookmarks drawer.
+            drawerLayout.closeDrawer(GravityCompat.END);
 
-                    // Store the variables for future use by `onRequestPermissionsResult()`.
-                    downloadUrl = url;
-                    downloadContentDisposition = contentDisposition;
-                    downloadContentLength = contentLength;
+            // Reload the bookmarks drawer.
+            loadBookmarksFolder();
 
-                    // Show a dialog if the user has previously denied the permission.
-                    if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
-                        // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
-                        DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
+            // Reset `restartFromBookmarksActivity`.
+            restartFromBookmarksActivity = false;
+        }
 
-                        // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
-                        downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
-                    } else {  // Show the permission request directly.
-                        // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
-                        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
-                    }
-                } else {  // The storage permission has already been granted.
-                    // Get a handle for the download file alert dialog.
-                    AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
+        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
+        updatePrivacyIcons(true);
+    }
 
-                    // Show the download file alert dialog.
-                    downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                }
-            }
-        });
+    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
+    @Override
+    public void onResume() {
+        // Run the default commands.
+        super.onResume();
 
-        // Allow pinch to zoom.
-        mainWebView.getSettings().setBuiltInZoomControls(true);
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-        // Hide zoom controls.
-        mainWebView.getSettings().setDisplayZoomControls(false);
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-        // 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);
+            // 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);
 
-        // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
-        mainWebView.getSettings().setLoadWithOverviewMode(true);
+                // Resume the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.resumeTimers();
 
-        // Explicitly disable geolocation.
-        mainWebView.getSettings().setGeolocationEnabled(false);
+                // Resume the nested scroll WebView.
+                nestedScrollWebView.onResume();
+            }
+        }
 
-        // Initialize cookieManager.
-        cookieManager = CookieManager.getInstance();
+        // Display a message to the user if waiting for Orbot.
+        if (waitingForOrbot && !orbotStatus.equals("ON")) {
+            // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
+            currentWebView.getSettings().setUseWideViewPort(false);
 
-        // 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", "");
+            // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
+            currentWebView.loadData("<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>", "text/html", null);
+        }
 
-        // 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);
+        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
+            // Get a handle for the root frame layouts.
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
 
-        // Get a handle for the `Runtime`.
-        privacyBrowserRuntime = Runtime.getRuntime();
+            // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
-        // 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`.
+            /* 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")) {  // Resume the adView for the free flavor.
+            // Resume the ad.
+            AdHelper.resumeAd(findViewById(R.id.adview));
+        }
+    }
 
-        // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
-        inFullScreenBrowsingMode = false;
+    @Override
+    public void onPause() {
+        // Run the default commands.
+        super.onPause();
 
-        // Initialize the privacy settings variables.
-        javaScriptEnabled = false;
-        firstPartyCookiesEnabled = false;
-        thirdPartyCookiesEnabled = false;
-        domStorageEnabled = false;
-        saveFormDataEnabled = false;  // Form data can be removed once the minimum API >= 26.
-        nightMode = false;
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-        // Store the default user agent.
-        webViewDefaultUserAgent = mainWebView.getSettings().getUserAgentString();
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-        // Initialize the WebView title.
-        webViewTitle = getString(R.string.no_title);
+            // 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);
 
-        // Initialize the favorite icon bitmap.  `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();
+                // Pause the nested scroll WebView.
+                nestedScrollWebView.onPause();
 
-        // If the favorite icon is null, load the default.
-        if (favoriteIconBitmap == null) {
-            favoriteIconBitmap = favoriteIconDefaultBitmap;
+                // Pause the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.pauseTimers();
+            }
         }
 
-        // Initialize the user agent array adapter and string array.
-        userAgentNamesArray = ArrayAdapter.createFromResource(this, R.array.user_agent_names, R.layout.spinner_item);
-        userAgentDataArray = getResources().getStringArray(R.array.user_agent_data);
-
-        // Apply the app settings from the shared preferences.
-        applyAppSettings();
-
-        // Instantiate the block list helper.
-        BlockListHelper blockListHelper = new BlockListHelper();
+        // Pause the ad or it will continue to consume resources in the background on the free flavor.
+        if (BuildConfig.FLAVOR.contentEquals("free")) {
+            // Pause the ad.
+            AdHelper.pauseAd(findViewById(R.id.adview));
+        }
+    }
 
-        // Initialize the list of resource requests.
-        resourceRequests = new ArrayList<>();
+    @Override
+    public void onDestroy() {
+        // Unregister the Orbot status broadcast receiver.
+        this.unregisterReceiver(orbotStatusBroadcastReceiver);
 
-        // Parse the block lists.
-        final ArrayList<List<String[]>> easyList = blockListHelper.parseBlockList(getAssets(), "blocklists/easylist.txt");
-        final ArrayList<List<String[]>> easyPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/easyprivacy.txt");
-        final ArrayList<List<String[]>> fanboysAnnoyanceList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-annoyance.txt");
-        final ArrayList<List<String[]>> fanboysSocialList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-social.txt");
-        final ArrayList<List<String[]>> ultraPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/ultraprivacy.txt");
-
-        // Store the list versions.
-        easyListVersion = easyList.get(0).get(0)[0];
-        easyPrivacyVersion = easyPrivacy.get(0).get(0)[0];
-        fanboysAnnoyanceVersion = fanboysAnnoyanceList.get(0).get(0)[0];
-        fanboysSocialVersion = fanboysSocialList.get(0).get(0)[0];
-        ultraPrivacyVersion = ultraPrivacy.get(0).get(0)[0];
-
-        // Get a handle for the activity.  This is used to update the requests counter while the navigation menu is open.
-        Activity activity = this;
+        // Close the bookmarks cursor and database.
+        bookmarksCursor.close();
+        bookmarksDatabaseHelper.close();
 
-        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.
-            // The deprecated `shouldOverrideUrlLoading` must be used until API >= 24.
-            @SuppressWarnings("deprecation")
-            @Override
-            public boolean shouldOverrideUrlLoading(WebView view, String url) {
-                if (url.startsWith("http")) {  // Load the URL in Privacy Browser.
-                    // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
-                    formattedUrlString = "";
+        // Run the default commands.
+        super.onDestroy();
+    }
 
-                    // Apply the domain settings for the new URL.  `applyDomainSettings` doesn't do anything if the domain has not changed.
-                    boolean userAgentChanged = applyDomainSettings(url, true, false);
+    @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);
 
-                    // Check if the user agent has changed.
-                    if (userAgentChanged) {
-                        // Manually load the URL.  The changing of the user agent will cause WebView to reload the previous URL.
-                        mainWebView.loadUrl(url, customHeaders);
+        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
+        optionsMenu = menu;
 
-                        // Returning true indicates that Privacy Browser is manually handling the loading of the URL.
-                        return true;
-                    } else {
-                        // Returning false causes the current WebView to handle the URL and prevents it from adding redirects to the history list.
-                        return false;
-                    }
-                } 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);
+        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
+        updatePrivacyIcons(false);
 
-                    // Parse the url and set it as the data for the intent.
-                    emailIntent.setData(Uri.parse(url));
+        // 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);  // Form data can be removed once the minimum API >= 26.
+        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
+        MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
+        MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
 
-                    // Open the email program in a new task instead of as part of Privacy Browser.
-                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // Only display third-party cookies if API >= 21
+        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 
-                    // Make it so.
-                    startActivity(emailIntent);
+        // Only display the form data menu items if the API < 26.
+        toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
+        clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
 
-                    // 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);
+        // Disable the clear form data menu item if the API >= 26 so that the status of the main Clear Data is calculated correctly.
+        clearFormDataMenuItem.setEnabled(Build.VERSION.SDK_INT < 26);
 
-                    // Add the phone number to the intent.
-                    dialIntent.setData(Uri.parse(url));
+        // Only show Ad Consent if this is the free flavor.
+        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
 
-                    // Open the dialer in a new task instead of as part of Privacy Browser.
-                    dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // Get the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // Make it so.
-                    startActivity(dialIntent);
+        // Get the dark theme and app bar preferences..
+        boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-                    // 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);
+        // 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) {
+            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+            refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
+        } else { //Do not display the additional icons.
+            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+            refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+        }
 
-                    // Add the URL to the intent.
-                    genericIntent.setData(Uri.parse(url));
+        // Replace Refresh with Stop if a URL is already loading.
+        if (currentWebView != null && currentWebView.getProgress() != 100) {
+            // Set the title.
+            refreshMenuItem.setTitle(R.string.stop);
 
-                    // List all apps that can handle the URL instead of just opening the first one.
-                    genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
+            // If the icon is displayed in the AppBar, set it according to the theme.
+            if (displayAdditionalAppBarIcons) {
+                if (darkTheme) {
+                    refreshMenuItem.setIcon(R.drawable.close_dark);
+                } else {
+                    refreshMenuItem.setIcon(R.drawable.close_light);
+                }
+            }
+        }
 
-                    // Open the app in a new task instead of as part of Privacy Browser.
-                    genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        return true;
+    }
 
-                    // Start the app or display a snackbar if no app is available to handle the URL.
-                    try {
-                        startActivity(genericIntent);
-                    } catch (ActivityNotFoundException exception) {
-                        Snackbar.make(mainWebView, getString(R.string.unrecognized_url) + "  " + url, Snackbar.LENGTH_SHORT).show();
-                    }
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        // Get handles for the menu items.
+        MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
+        MenuItem firstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
+        MenuItem thirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
+        MenuItem domStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
+        MenuItem saveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
+        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);  // Form data can be removed once the minimum API >= 26.
+        MenuItem blocklistsMenuItem = menu.findItem(R.id.blocklists);
+        MenuItem easyListMenuItem = menu.findItem(R.id.easylist);
+        MenuItem easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
+        MenuItem fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
+        MenuItem fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
+        MenuItem ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
+        MenuItem blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
+        MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
+        MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
+        MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
+        MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
+        MenuItem proxyThroughOrbotMenuItem = menu.findItem(R.id.proxy_through_orbot);
 
-                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
-                    return true;
-                }
+        // 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()) {
+                addOrEditDomain.setTitle(R.string.edit_domain_settings);
+            } else {
+                addOrEditDomain.setTitle(R.string.add_domain_settings);
             }
 
-            // 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){
-                // 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()));
+            // 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.
+            domStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
+            saveFormDataMenuItem.setChecked(currentWebView.getSettings().getSaveFormData());  // Form data can be removed once the minimum API >= 26.
+            easyListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
+            easyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
+            fanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+            fanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+            ultraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
+            blockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+            swipeToRefreshMenuItem.setChecked(currentWebView.getSwipeToRefresh());
+            displayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
+            nightModeMenuItem.setChecked(currentWebView.getNightMode());
+
+            // Initialize the display names for the blocklists with the number of blocked requests.
+            blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+            easyListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASY_LIST) + " - " + getString(R.string.easylist));
+            easyPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASY_PRIVACY) + " - " + getString(R.string.easyprivacy));
+            fanboysAnnoyanceListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " + getString(R.string.fanboys_annoyance_list));
+            fanboysSocialBlockingListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " + getString(R.string.fanboys_social_blocking_list));
+            ultraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRA_PRIVACY) + " - " + getString(R.string.ultraprivacy));
+            blockAllThirdPartyRequestsMenuItem.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.
+                thirdPartyCookiesMenuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
+
+                // Enable third-party cookies if first-party cookies are enabled.
+                thirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
+            }
 
-                // Reset the whitelist results tracker.
-                whiteListResultStringArray = null;
+            // Enable DOM Storage if JavaScript is enabled.
+            domStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
+        }
 
-                // Initialize the third party request tracker.
-                boolean isThirdPartyRequest = false;
+        // Set the status of the menu item checkboxes.
+        firstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
+        proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
 
-                // Initialize the current domain string.
-                String currentDomain = "";
+        // Enable Clear Cookies if there are any.
+        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
 
-                // Nobody is happy when comparing null strings.
-                if (!(formattedUrlString == null) && !(url == null)) {
-                    // Get the domain strings to URIs.
-                    Uri currentDomainUri = Uri.parse(formattedUrlString);
-                    Uri requestDomainUri = Uri.parse(url);
+        // 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;
 
-                    // Get the domain host names.
-                    String currentBaseDomain = currentDomainUri.getHost();
-                    String requestBaseDomain = requestDomainUri.getHost();
+        // 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;
+        }
 
-                    // Update the current domain variable.
-                    currentDomain = currentBaseDomain;
+        // 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;
+        }
 
-                    // Only compare the current base domain and the request base domain if neither is null.
-                    if (!(currentBaseDomain == null) && !(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);
-                        }
+        // Enable Clear DOM Storage if there is any.
+        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
 
-                        // 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);
-                        }
+        // 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);
 
-                        // Update the third party request tracker.
-                        isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
-                    }
-                }
+            // Enable the clear form data menu item if there is anything to clear.
+            clearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
+        }
 
-                // Block third-party requests if enabled.
-                if (isThirdPartyRequest && blockAllThirdPartyRequests) {
-                    // Increment the blocked requests counters.
-                    blockedRequests++;
-                    thirdPartyBlockedRequests++;
-
-                    // Update the titles of the blocklist menu items.  This must be run from the UI thread.
-                    activity.runOnUiThread(() -> {
-                        navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                        blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                        blockAllThirdPartyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
-                    });
+        // Enable Clear Data if any of the submenu items are enabled.
+        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
 
-                    // Add the request to the log.
-                    resourceRequests.add(new String[]{String.valueOf(REQUEST_THIRD_PARTY), url});
+        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
+        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
 
-                    // Return an empty web resource response.
-                    return emptyWebResourceResponse;
-                }
+        // 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.
+            menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
+        } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
+            menu.findItem(R.id.user_agent_webview_default).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
+            menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
+            menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
+            menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
+            menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
+            menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
+            menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
+            menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
+            menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
+            menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
+            menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
+        } else {  // Custom user agent.
+            menu.findItem(R.id.user_agent_custom).setChecked(true);
+        }
 
-                // Check UltraPrivacy if it is enabled.
-                if (ultraPrivacyEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, ultraPrivacy)) {
-                        // Increment the blocked requests counters.
-                        blockedRequests++;
-                        ultraPrivacyBlockedRequests++;
+        // Instantiate the font size title and the selected font size menu item.
+        String fontSizeTitle;
+        MenuItem selectedFontSizeMenuItem;
 
-                        // Update the titles of the blocklist menu items.  This must be run from the UI thread.
-                        activity.runOnUiThread(() -> {
-                            navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            ultraPrivacyMenuItem.setTitle(ultraPrivacyBlockedRequests + " - " + getString(R.string.ultraprivacy));
-                        });
+        // 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;
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
+            case 50:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
+                break;
 
-                    // If the whitelist result is not null, the request has been allowed by UltraPrivacy.
-                    if (whiteListResultStringArray != null) {
-                        // Add a whitelist entry to the resource requests array.
-                        resourceRequests.add(whiteListResultStringArray);
+            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;
 
-                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
-                        return null;
-                    }
-                }
+            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;
 
-                // Check EasyList if it is enabled.
-                if (easyListEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyList)) {
-                        // Increment the blocked requests counters.
-                        blockedRequests++;
-                        easyListBlockedRequests++;
+            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;
 
-                        // Update the titles of the blocklist menu items.  This must be run from the UI thread.
-                        activity.runOnUiThread(() -> {
-                            navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            easyListMenuItem.setTitle(easyListBlockedRequests + " - " + getString(R.string.easylist));
-                        });
+            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;
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+            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;
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                }
+            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;
 
-                // Check EasyPrivacy if it is enabled.
-                if (easyPrivacyEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyPrivacy)) {
-                        // Increment the blocked requests counters.
-                        blockedRequests++;
-                        easyPrivacyBlockedRequests++;
+            default:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+                break;
+        }
 
-                        // Update the titles of the blocklist menu items.  This must be run from the UI thread.
-                        activity.runOnUiThread(() -> {
-                            navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            easyPrivacyMenuItem.setTitle(easyPrivacyBlockedRequests + " - " + getString(R.string.easyprivacy));
-                        });
+        // Set the font size title and select the current size menu item.
+        fontSizeMenuItem.setTitle(fontSizeTitle);
+        selectedFontSizeMenuItem.setChecked(true);
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+        // Run all the other default commands.
+        super.onPrepareOptionsMenu(menu);
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                }
+        // Display the menu.
+        return true;
+    }
 
-                // Check Fanboy’s Annoyance List if it is enabled.
-                if (fanboysAnnoyanceListEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList)) {
-                        // Increment the blocked requests counters.
-                        blockedRequests++;
-                        fanboysAnnoyanceListBlockedRequests++;
+    @Override
+    // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
+    @SuppressLint("SetJavaScriptEnabled")
+    public boolean onOptionsItemSelected(MenuItem menuItem) {
+        // Reenter full screen browsing mode if it was interrupted by the options menu.  <https://redmine.stoutner.com/issues/389>
+        if (inFullScreenBrowsingMode) {
+            // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
-                        // Update the titles of the blocklist menu items.  This must be run from the UI thread.
-                        activity.runOnUiThread(() -> {
-                            navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            fanboysAnnoyanceListMenuItem.setTitle(fanboysAnnoyanceListBlockedRequests + " - " + getString(R.string.fanboys_annoyance_list));
-                        });
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+
+            /* 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);
+        }
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+        // Get the selected menu item ID.
+        int menuItemId = menuItem.getItemId();
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                } else if (fanboysSocialBlockingListEnabled){  // Only check Fanboy’s Social Blocking List if Fanboy’s Annoyance List is disabled.
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysSocialList)) {
-                        // Increment the blocked requests counters.
-                        blockedRequests++;
-                        fanboysSocialBlockingListBlockedRequests++;
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                        // Update the titles of the blocklist menu items.  This must be run from the UI thread.
-                        activity.runOnUiThread(() -> {
-                            navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
-                        });
+        // Get a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+        // Run the commands that correlate to the selected menu item.
+        switch (menuItemId) {
+            case R.id.toggle_javascript:
+                // Toggle the JavaScript status.
+                currentWebView.getSettings().setJavaScriptEnabled(!currentWebView.getSettings().getJavaScriptEnabled());
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                }
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-                // 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.
-                    resourceRequests.add(whiteListResultStringArray);
-                } else {  // The request didn't match any blocklist entry.  Log it as a default request.
-                    resourceRequests.add(new String[]{String.valueOf(REQUEST_DEFAULT), url});
+                // Display a `Snackbar`.
+                if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
+                } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
+                } else {  // Privacy mode.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
                 }
 
-                // The resource request has not been blocked.  `return null` loads the requested resource.
-                return null;
-            }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // 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;
+            case R.id.add_or_edit_domain:
+                if (currentWebView.getDomainSettingsApplied()) {  // Edit the current domain settings.
+                    // Reapply the domain settings on returning to `MainWebViewActivity`.
+                    reapplyDomainSettingsOnRestart = true;
 
-                // Display the HTTP authentication dialog.
-                AppCompatDialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
-                httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
-            }
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-            // Update the URL in urlTextBox when the page starts to load.
-            @Override
-            public void onPageStarted(WebView view, String url, Bitmap favicon) {
-                // Reset the list of resource requests.
-                resourceRequests.clear();
+                    // 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);
+                    }
 
-                // Initialize the counters for requests blocked by each blocklist.
-                blockedRequests = 0;
-                easyListBlockedRequests = 0;
-                easyPrivacyBlockedRequests = 0;
-                fanboysAnnoyanceListBlockedRequests = 0;
-                fanboysSocialBlockingListBlockedRequests = 0;
-                ultraPrivacyBlockedRequests = 0;
-                thirdPartyBlockedRequests = 0;
+                    // 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());
+                    }
 
-                // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
-                if (nightMode) {
-                    mainWebView.setVisibility(View.INVISIBLE);
-                }
+                    // Make it so.
+                    startActivity(domainsIntent);
+                } else {  // Add a new domain.
+                    // Apply the new domain settings on returning to `MainWebViewActivity`.
+                    reapplyDomainSettingsOnRestart = true;
 
-                // Hide the keyboard.  `0` indicates no additional flags.
-                inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
+                    // Get the current domain
+                    Uri currentUri = Uri.parse(currentWebView.getUrl());
+                    String currentDomain = currentUri.getHost();
 
-                // Check to see if Privacy Browser is 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;
+                    // 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);
 
-                    // Display the formatted URL text.
-                    urlTextBox.setText(formattedUrlString);
+                    // Create the domain and store the database ID.
+                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
 
-                    // Apply text highlighting to `urlTextBox`.
-                    highlightUrlText();
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-                    // Apply any custom domain settings if the URL was loaded by navigating history.
-                    if (navigatingHistory) {
-                        // Apply the domain settings.
-                        boolean userAgentChanged = applyDomainSettings(url, true, false);
+                    // 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);
+                    }
 
-                        // Reset `navigatingHistory`.
-                        navigatingHistory = false;
+                    // 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());
+                    }
 
-                        // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
-                        if (userAgentChanged) {
-                            loadUrl(formattedUrlString);
-                        }
-                    }
+                    // Make it so.
+                    startActivity(domainsIntent);
+                }
+                return true;
 
-                    // 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;
+            case R.id.toggle_first_party_cookies:
+                // Switch the first-party cookie status.
+                cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
 
-                    // Replace Refresh with Stop if the menu item has been created.  (The WebView typically begins loading before the menu items are instantiated.)
-                    if (refreshMenuItem != null) {
-                        // Set the title.
-                        refreshMenuItem.setTitle(R.string.stop);
+                // Store the first-party cookie status.
+                currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
 
-                        // If the icon is displayed in the AppBar, set it according to the theme.
-                        if (displayAdditionalAppBarIcons) {
-                            if (darkTheme) {
-                                refreshMenuItem.setIcon(R.drawable.close_dark);
-                            } else {
-                                refreshMenuItem.setIcon(R.drawable.close_light);
-                            }
-                        }
-                    }
-                }
-            }
+                // Update the menu checkbox.
+                menuItem.setChecked(cookieManager.acceptCookie());
 
-            // 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 the wide view port if it has been turned off by the waiting for Orbot message.
-                if (!waitingForOrbot) {
-                    mainWebView.getSettings().setUseWideViewPort(true);
-                }
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-                // Flush any cookies to persistent storage.  `CookieManager` has become very lazy about flushing cookies in recent versions.
-                if (firstPartyCookiesEnabled && Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.flush();
+                // Display a snackbar.
+                if (cookieManager.acceptCookie()) {  // First-party cookies are enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
+                } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is still enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
+                } else {  // Privacy mode.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
                 }
 
-                // Update the Refresh menu item if it has been created.
-                if (refreshMenuItem != null) {
-                    // Reset the Refresh title.
-                    refreshMenuItem.setTitle(R.string.refresh);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                    // If the icon is displayed in the AppBar, reset it according to the theme.
-                    if (displayAdditionalAppBarIcons) {
-                        if (darkTheme) {
-                            refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
-                        } else {
-                            refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
-                        }
+            case R.id.toggle_third_party_cookies:
+                if (Build.VERSION.SDK_INT >= 21) {
+                    // Switch the status of thirdPartyCookiesEnabled.
+                    cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
+
+                    // Update the menu checkbox.
+                    menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
+
+                    // Display a snackbar.
+                    if (cookieManager.acceptThirdPartyCookies(currentWebView)) {
+                        Snackbar.make(findViewById(R.id.webviewpager), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
+                    } else {
+                        Snackbar.make(findViewById(R.id.webviewpager), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
                     }
-                }
 
-                // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
-                urlIsLoading = false;
+                    // Reload the current WebView.
+                    currentWebView.reload();
+                } // Else do nothing because SDK < 21.
+                return true;
 
-                // Clear the cache and history if Incognito Mode is enabled.
-                if (incognitoModeEnabled) {
-                    // Clear the cache.  `true` includes disk files.
-                    mainWebView.clearCache(true);
+            case R.id.toggle_dom_storage:
+                // Toggle the status of domStorageEnabled.
+                currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
 
-                    // Clear the back/forward history.
-                    mainWebView.clearHistory();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
 
-                    // Manually delete cache folders.
-                    try {
-                        // Delete the main cache directory.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+                // Update the privacy icon.  `true` refreshes the app bar icons.
+                updatePrivacyIcons(true);
 
-                        // 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.
-                        privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
-                    } catch (IOException e) {
-                        // Do nothing if an error is thrown.
-                    }
+                // Display a snackbar.
+                if (currentWebView.getSettings().getDomStorageEnabled()) {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
+                } else {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
                 }
 
-                // 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 = "";
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                        urlTextBox.setText(formattedUrlString);
+            // Form data can be removed once the minimum API >= 26.
+            case R.id.toggle_save_form_data:
+                // Switch the status of saveFormDataEnabled.
+                currentWebView.getSettings().setSaveFormData(!currentWebView.getSettings().getSaveFormData());
 
-                        // Request focus for `urlTextBox`.
-                        urlTextBox.requestFocus();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
 
-                        // Display the keyboard.
-                        inputMethodManager.showSoftInput(urlTextBox, 0);
+                // Display a snackbar.
+                if (currentWebView.getSettings().getSaveFormData()) {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
+                } else {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
+                }
 
-                        // Apply the domain settings.  This clears any settings from the previous domain.
-                        applyDomainSettings(formattedUrlString, true, false);
-                    } else {  // `WebView` has loaded a webpage.
-                        // Set `formattedUrlString`.
-                        formattedUrlString = url;
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-                        // Only update `urlTextBox` if the user is not typing in it.
-                        if (!urlTextBox.hasFocus()) {
-                            // Display the formatted URL text.
-                            urlTextBox.setText(formattedUrlString);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                            // Apply text highlighting to `urlTextBox`.
-                            highlightUrlText();
-                        }
-                    }
+            case R.id.clear_cookies:
+                Snackbar.make(findViewById(R.id.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() {
+                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
+                            @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();
+                return true;
 
-                    // 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.
-                    // Also ignore if changes in the user agent causes an error while navigating history.
-                    if (pinnedDomainSslCertificate && !ignorePinnedSslCertificate && navigatingHistory) {
-                        // 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();
-                        }
+            case R.id.clear_dom_storage:
+                Snackbar.make(findViewById(R.id.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() {
+                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
+                            @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.
+                                        }
+                                    };
 
-                        // 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 = "";
+                                    // Manually delete the DOM storage files after 200 milliseconds.
+                                    deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
+                                }
+                            }
+                        })
+                        .show();
+                return true;
 
-                        // Convert the `Dates` to `Strings` if they are not `null`.
-                        if (currentWebsiteSslStartDate != null) {
-                            currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString();
-                        }
+            // Form data can be remove once the minimum API >= 26.
+            case R.id.clear_form_data:
+                Snackbar.make(findViewById(R.id.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() {
+                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
+                            @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 form data.
+                                    WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
+                                    mainWebViewDatabase.clearFormData();
+                                }
+                            }
+                        })
+                        .show();
+                return true;
 
-                        if (currentWebsiteSslEndDate != null) {
-                            currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString();
-                        }
+            case R.id.easylist:
+                // Toggle the EasyList status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASY_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
 
-                        if (pinnedDomainSslStartDate != null) {
-                            pinnedDomainSslStartDateString = pinnedDomainSslStartDate.toString();
-                        }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
 
-                        if (pinnedDomainSslEndDate != null) {
-                            pinnedDomainSslEndDateString = pinnedDomainSslEndDate.toString();
-                        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                        // 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));
-                        }
-                    }
-                }
-            }
+            case R.id.easyprivacy:
+                // Toggle the EasyPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
 
-            // Handle SSL Certificate errors.
-            @Override
-            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
-                // Get the current website SSL certificate.
-                SslCertificate currentWebsiteSslCertificate = error.getCertificate();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
 
-                // 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();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                // 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;
+            case R.id.fanboys_annoyance_list:
+                // Toggle Fanboy's Annoyance List status.
+                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-                    // Display the SSL error `AlertDialog`.
-                    AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
-                    sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
-                }
-            }
-        });
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-        // Get the intent that started the app.
-        Intent launchingIntent = getIntent();
+                // Update the staus of Fanboy's Social Blocking List.
+                MenuItem fanboysSocialBlockingListMenuItem = optionsMenu.findItem(R.id.fanboys_social_blocking_list);
+                fanboysSocialBlockingListMenuItem.setEnabled(!currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-        // Get the information from the intent.
-        String launchingIntentAction = launchingIntent.getAction();
-        Uri launchingIntentUriData = launchingIntent.getData();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // If the intent action is a web search, perform the search.
-        if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {
-            // Create an encoded URL string.
-            String encodedUrlString;
+            case R.id.fanboys_social_blocking_list:
+                // Toggle Fanboy's Social Blocking List status.
+                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
 
-            Log.i("Intent", launchingIntent.getStringExtra(SearchManager.QUERY));
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
 
-            // Sanitize the search input and convert it to a search.
-            try {
-                encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
-            }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // Add the base search URL.
-            formattedUrlString = searchURL + encodedUrlString;
-        } else if (launchingIntentUriData != null){  // Check to see if the intent contains a new URL.
-            // Set the formatted URL string.
-            formattedUrlString = launchingIntentUriData.toString();
-        }
+            case R.id.ultraprivacy:
+                // Toggle the UltraPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.ULTRA_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
 
-        // Load the website if not waiting for Orbot to connect.
-        if (!waitingForOrbot) {
-            loadUrl(formattedUrlString);
-        }
-    }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
 
-    @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);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        Log.i("Intent", intent.getAction());
+            case R.id.block_all_third_party_requests:
+                //Toggle the third-party requests blocker status.
+                currentWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, !currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-        // Get the information from the intent.
-        String intentAction = intent.getAction();
-        Uri intentUriData = intent.getData();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-        // If the intent action is a web search, perform the search.
-        if ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH)) {
-            // Create an encoded URL string.
-            String encodedUrlString;
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // Sanitize the search input and convert it to a search.
-            try {
-                encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
-            }
+            case R.id.user_agent_privacy_browser:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
 
-            // Add the base search URL.
-            formattedUrlString = searchURL + encodedUrlString;
-        } else if (intentUriData != null){  // Check to see if the intent contains a new URL.
-            // Set the formatted URL string.
-            formattedUrlString = intentUriData.toString();
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Load the URL.
-        loadUrl(formattedUrlString);
+            case R.id.user_agent_webview_default:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString("");
 
-        // Close the navigation drawer if it is open.
-        if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
-            drawerLayout.closeDrawer(GravityCompat.START);
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Close the bookmarks drawer if it is open.
-        if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
-            drawerLayout.closeDrawer(GravityCompat.END);
-        }
+            case R.id.user_agent_firefox_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
 
-        // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
-        mainWebView.requestFocus();
-    }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-    @Override
-    public void onRestart() {
-        // Run the default commands.
-        super.onRestart();
+            case R.id.user_agent_chrome_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
 
-        // Make sure Orbot is running if Privacy Browser is proxying through Orbot.
-        if (proxyThroughOrbot) {
-            // Request Orbot to start.  If Orbot is already running no hard will be caused by this request.
-            Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // Send the intent to the Orbot package.
-            orbotIntent.setPackage("org.torproject.android");
+            case R.id.user_agent_safari_on_ios:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
 
-            // Make it so.
-            sendBroadcast(orbotIntent);
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Apply the app settings if returning from the Settings activity..
-        if (reapplyAppSettingsOnRestart) {
-            // Apply the app settings.
-            applyAppSettings();
+            case R.id.user_agent_firefox_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
 
-            // Reload the webpage if displaying of images has been disabled in the Settings activity.
-            if (reloadOnRestart) {
-                // Reload `mainWebView`.
-                mainWebView.reload();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                // Reset `reloadOnRestartBoolean`.
-                reloadOnRestart = false;
-            }
+            case R.id.user_agent_chromium_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
 
-            // Reset the return from settings flag.
-            reapplyAppSettingsOnRestart = false;
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Apply the domain settings if returning from the Domains activity.
-        if (reapplyDomainSettingsOnRestart) {
-            // Reapply the domain settings.
-            applyDomainSettings(formattedUrlString, false, true);
+            case R.id.user_agent_firefox_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
 
-            // Reset `reapplyDomainSettingsOnRestart`.
-            reapplyDomainSettingsOnRestart = false;
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Load the URL on restart to apply changes to night mode.
-        if (loadUrlOnRestart) {
-            // Load the current `formattedUrlString`.
-            loadUrl(formattedUrlString);
+            case R.id.user_agent_chrome_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
 
-            // Reset `loadUrlOnRestart.
-            loadUrlOnRestart = false;
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Update the bookmarks drawer if returning from the Bookmarks activity.
-        if (restartFromBookmarksActivity) {
-            // Close the bookmarks drawer.
-            drawerLayout.closeDrawer(GravityCompat.END);
-
-            // Reload the bookmarks drawer.
-            loadBookmarksFolder();
+            case R.id.user_agent_edge_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
 
-            // Reset `restartFromBookmarksActivity`.
-            restartFromBookmarksActivity = false;
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
-        updatePrivacyIcons(true);
-    }
+            case R.id.user_agent_internet_explorer_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
 
-    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
-    @Override
-    public void onResume() {
-        // Run the default commands.
-        super.onResume();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Resume JavaScript (if enabled).
-        mainWebView.resumeTimers();
+            case R.id.user_agent_safari_on_macos:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
 
-        // Resume `mainWebView`.
-        mainWebView.onResume();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Resume the adView for the free flavor.
-        if (BuildConfig.FLAVOR.contentEquals("free")) {
-            // Resume the ad.
-            AdHelper.resumeAd(findViewById(R.id.adview));
-        }
+            case R.id.user_agent_custom:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
 
-        // Display a message to the user if waiting for Orbot.
-        if (waitingForOrbot && !orbotStatus.equals("ON")) {
-            // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
-            mainWebView.getSettings().setUseWideViewPort(false);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
-            mainWebView.loadData(waitingForOrbotHtmlString, "text/html", null);
-        }
+            case R.id.font_size_twenty_five_percent:
+                currentWebView.getSettings().setTextZoom(25);
+                return true;
 
-        if (displayingFullScreenVideo) {
-            // Remove the translucent overlays.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            case R.id.font_size_fifty_percent:
+                currentWebView.getSettings().setTextZoom(50);
+                return 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);
+            case R.id.font_size_seventy_five_percent:
+                currentWebView.getSettings().setTextZoom(75);
+                return true;
 
-            /* 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 re-hides them after they are shown.
-             */
-            rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-        }
-    }
+            case R.id.font_size_one_hundred_percent:
+                currentWebView.getSettings().setTextZoom(100);
+                return true;
 
-    @Override
-    public void onPause() {
-        // Run the default commands.
-        super.onPause();
+            case R.id.font_size_one_hundred_twenty_five_percent:
+                currentWebView.getSettings().setTextZoom(125);
+                return true;
 
-        // Pause `mainWebView`.
-        mainWebView.onPause();
+            case R.id.font_size_one_hundred_fifty_percent:
+                currentWebView.getSettings().setTextZoom(150);
+                return true;
 
-        // Stop all JavaScript.
-        mainWebView.pauseTimers();
+            case R.id.font_size_one_hundred_seventy_five_percent:
+                currentWebView.getSettings().setTextZoom(175);
+                return true;
 
-        // Pause the ad or it will continue to consume resources in the background on the free flavor.
-        if (BuildConfig.FLAVOR.contentEquals("free")) {
-            // Pause the ad.
-            AdHelper.pauseAd(findViewById(R.id.adview));
-        }
-    }
+            case R.id.font_size_two_hundred_percent:
+                currentWebView.getSettings().setTextZoom(200);
+                return true;
 
-    @Override
-    public void onDestroy() {
-        // Unregister the Orbot status broadcast receiver.
-        this.unregisterReceiver(orbotStatusBroadcastReceiver);
+            case R.id.swipe_to_refresh:
+                // Toggle the stored status of swipe to refresh.
+                currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
+
+                // Get a handle for the swipe refresh layout.
+                SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+
+                // Update the swipe refresh layout.
+                if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
+                    if (Build.VERSION.SDK_INT >= 23) {  // For API >= 23, the status of the scroll refresh listener is continuously updated by the on scroll change listener.
+                        // Only enable the swipe refresh layout if the WebView is scrolled to the top.
+                        swipeRefreshLayout.setEnabled(currentWebView.getY() == 0);
+                    } else {  // For API < 23, the swipe refresh layout is always enabled.
+                        // Enable the swipe refresh layout.
+                        swipeRefreshLayout.setEnabled(true);
+                    }
+                } else {  // Swipe to refresh is disabled.
+                    // Disable the swipe refresh layout.
+                    swipeRefreshLayout.setEnabled(false);
+                }
+                return true;
 
-        // Close the bookmarks cursor and database.
-        bookmarksCursor.close();
-        bookmarksDatabaseHelper.close();
+            case R.id.display_images:
+                if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
+                    // Disable loading of images.
+                    currentWebView.getSettings().setLoadsImagesAutomatically(false);
 
-        // Run the default commands.
-        super.onDestroy();
-    }
+                    // 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);
+                }
+                return true;
 
-    @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);
+            case R.id.night_mode:
+                // Toggle night mode.
+                currentWebView.setNightMode(!currentWebView.getNightMode());
 
-        // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
-        mainMenu = menu;
+                // Enable or disable JavaScript according to night mode, the global preference, and any domain settings.
+                if (currentWebView.getNightMode()) {  // Night mode is enabled, which requires JavaScript.
+                    // Enable JavaScript.
+                    currentWebView.getSettings().setJavaScriptEnabled(true);
+                } else if (currentWebView.getDomainSettingsApplied()) {  // Night mode is disabled and domain settings are applied.  Set JavaScript according to the domain settings.
+                    // Apply the JavaScript preference that was stored the last time domain settings were loaded.
+                    currentWebView.getSettings().setJavaScriptEnabled(currentWebView.getDomainSettingsJavaScriptEnabled());
+                } else {  // Night mode is disabled and domain settings are not applied.  Set JavaScript according to the global preference.
+                    // Apply the JavaScript preference.
+                    currentWebView.getSettings().setJavaScriptEnabled(sharedPreferences.getBoolean("javascript", false));
+                }
 
-        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
-        updatePrivacyIcons(false);
+                // Update the privacy icons.
+                updatePrivacyIcons(false);
 
-        // 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);  // Form data can be removed once the minimum API >= 26.
-        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
-        refreshMenuItem = menu.findItem(R.id.refresh);
-        blocklistsMenuItem = menu.findItem(R.id.blocklists);
-        easyListMenuItem = menu.findItem(R.id.easylist);
-        easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
-        fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
-        fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
-        ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
-        blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
-        MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
+                // Reload the website.
+                currentWebView.reload();
+                return true;
 
-        // Only display third-party cookies if API >= 21
-        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
+            case R.id.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);
 
-        // Only display the form data menu items if the API < 26.
-        toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
-        clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
+                // Set the minimum height of the find on page linear layout to match the toolbar.
+                findOnPageLinearLayout.setMinimumHeight(toolbar.getHeight());
 
-        // Only show Ad Consent if this is the free flavor.
-        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
+                // Hide the toolbar.
+                toolbar.setVisibility(View.GONE);
 
-        // Get the shared preference values.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // Show the find on page linear layout.
+                findOnPageLinearLayout.setVisibility(View.VISIBLE);
 
-        // Get the status of the additional AppBar icons.
-        displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
+                // 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 `findOnPageEditText`.
+                    findOnPageEditText.requestFocus();
 
-        // 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) {
-            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
-            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
-            refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
-        } else { //Do not display the additional icons.
-            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
-            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
-            refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
-        }
+                    // Get a handle for the input method manager.
+                    InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-        // Replace Refresh with Stop if a URL is already loading.
-        if (urlIsLoading) {
-            // Set the title.
-            refreshMenuItem.setTitle(R.string.stop);
+                    // Remove the lint warning below that the input method manager might be null.
+                    assert inputMethodManager != null;
 
-            // If the icon is displayed in the AppBar, set it according to the theme.
-            if (displayAdditionalAppBarIcons) {
-                if (darkTheme) {
-                    refreshMenuItem.setIcon(R.drawable.close_dark);
-                } else {
-                    refreshMenuItem.setIcon(R.drawable.close_light);
-                }
-            }
-        }
+                    // Display the keyboard.  `0` sets no input flags.
+                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
+                }, 200);
+                return true;
 
-        return true;
-    }
+            case R.id.view_source:
+                // Create an intent to launch the view source activity.
+                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
 
-    @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);  // Form data can be removed once the minimum API >= 26.
-        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);  // Form data can be removed once the minimum API >= 26.
-        MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
-        MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
-        MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
-        MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
-        MenuItem proxyThroughOrbotMenuItem = menu.findItem(R.id.proxy_through_orbot);
+                // Add the variables to the intent.
+                viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
+                viewSourceIntent.putExtra("current_url", currentWebView.getUrl());
 
-        // 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);
-        }
+                // Make it so.
+                startActivity(viewSourceIntent);
+                return true;
 
-        // Set the status of the menu item checkboxes.
-        toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
-        toggleThirdPartyCookiesMenuItem.setChecked(thirdPartyCookiesEnabled);
-        toggleDomStorageMenuItem.setChecked(domStorageEnabled);
-        toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);  // Form data can be removed once the minimum API >= 26.
-        easyListMenuItem.setChecked(easyListEnabled);
-        easyPrivacyMenuItem.setChecked(easyPrivacyEnabled);
-        fanboysAnnoyanceListMenuItem.setChecked(fanboysAnnoyanceListEnabled);
-        fanboysSocialBlockingListMenuItem.setChecked(fanboysSocialBlockingListEnabled);
-        ultraPrivacyMenuItem.setChecked(ultraPrivacyEnabled);
-        blockAllThirdPartyRequestsMenuItem.setChecked(blockAllThirdPartyRequests);
-        swipeToRefreshMenuItem.setChecked(swipeRefreshLayout.isEnabled());
-        displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
-        nightModeMenuItem.setChecked(nightMode);
-        proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
+            case R.id.share_url:
+                // Setup the share string.
+                String shareString = currentWebView.getTitle() + " – " + currentWebView.getUrl();
 
-        // Enable third-party cookies if first-party cookies are enabled.
-        toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
+                // Create the share intent.
+                Intent shareIntent = new Intent(Intent.ACTION_SEND);
+                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
+                shareIntent.setType("text/plain");
 
-        // Enable DOM Storage if JavaScript is enabled.
-        toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
+                // Make it so.
+                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
+                return true;
 
-        // Enable Clear Cookies if there are any.
-        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
+            case R.id.print:
+                // Get a print manager instance.
+                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
 
-        // 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;
-        }
+                // Remove the lint error below that print manager might be null.
+                assert printManager != null;
 
-        // 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;
-        }
+                // Create a print document adapter from the current WebView.
+                PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
 
-        // Enable Clear DOM Storage if there is any.
-        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
+                // Print the document.
+                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
+                return true;
 
-        // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
-        if (Build.VERSION.SDK_INT < 26) {
-            WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
-            clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
-        } else {
-            // Disable clear form data because it is not supported on current version of Android.
-            clearFormDataMenuItem.setEnabled(false);
-        }
+            case R.id.open_with_app:
+                openWithApp(currentWebView.getUrl());
+                return true;
 
-        // Enable Clear Data if any of the submenu items are enabled.
-        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
+            case R.id.open_with_browser:
+                openWithBrowser(currentWebView.getUrl());
+                return true;
 
-        // Disable Fanboy's Social Blocking List if Fanboy's Annoyance List is checked.
-        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
+            case R.id.add_to_homescreen:
+                // Instantiate the create home screen shortcut dialog.
+                DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
+                        currentWebView.getFavoriteOrDefaultIcon());
 
-        // Initialize the display names for the blocklists with the number of blocked requests.
-        blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + blockedRequests);
-        easyListMenuItem.setTitle(easyListBlockedRequests + " - " + getString(R.string.easylist));
-        easyPrivacyMenuItem.setTitle(easyPrivacyBlockedRequests + " - " + getString(R.string.easyprivacy));
-        fanboysAnnoyanceListMenuItem.setTitle(fanboysAnnoyanceListBlockedRequests + " - " + getString(R.string.fanboys_annoyance_list));
-        fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
-        ultraPrivacyMenuItem.setTitle(ultraPrivacyBlockedRequests + " - " + getString(R.string.ultraprivacy));
-        blockAllThirdPartyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
+                // Show the create home screen shortcut dialog.
+                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
+                return true;
 
-        // Get the current user agent.
-        String currentUserAgent = mainWebView.getSettings().getUserAgentString();
+            case R.id.proxy_through_orbot:
+                // Toggle the proxy through Orbot variable.
+                proxyThroughOrbot = !proxyThroughOrbot;
 
-        // 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.
-            menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
-        } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
-            menu.findItem(R.id.user_agent_webview_default).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
-            menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
-            menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
-            menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
-            menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
-            menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
-            menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
-            menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
-            menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
-            menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
-            menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
-        } else {  // Custom user agent.
-            menu.findItem(R.id.user_agent_custom).setChecked(true);
-        }
+                // Apply the proxy through Orbot settings.
+                applyProxyThroughOrbot(true);
+                return true;
 
-        // Initialize font size variables.
-        int fontSize = mainWebView.getSettings().getTextZoom();
-        String fontSizeTitle;
-        MenuItem selectedFontSizeMenuItem;
+            case R.id.refresh:
+                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();
+                }
+                return true;
 
-        // 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;
-
-            case 50:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
-                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 100:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                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 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 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;
-
-            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;
+            case R.id.ad_consent:
+                // Display the ad consent dialog.
+                DialogFragment adConsentDialogFragment = new AdConsentDialog();
+                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
+                return true;
 
             default:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                break;
+                // Don't consume the event.
+                return super.onOptionsItemSelected(menuItem);
         }
-
-        // Set the font size title and select the current size menu item.
-        fontSizeMenuItem.setTitle(fontSizeTitle);
-        selectedFontSizeMenuItem.setChecked(true);
-
-        // Run all the other default commands.
-        super.onPrepareOptionsMenu(menu);
-
-        // Display the menu.
-        return true;
     }
 
-    @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.
+    @Override
+    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
+        // Get the menu item ID.
         int menuItemId = menuItem.getItemId();
 
-        // Set the commands that relate to the menu entries.
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+        // Run the commands that correspond to the selected menu item.
         switch (menuItemId) {
-            case R.id.toggle_javascript:
-                // Switch the status of javaScriptEnabled.
-                javaScriptEnabled = !javaScriptEnabled;
+            case R.id.close_tab:
+                // Get a handle for the tab layout and the view pager.
+                TabLayout tabLayout = findViewById(R.id.tablayout);
+                ViewPager webViewPager = findViewById(R.id.webviewpager);
 
-                // Apply the new JavaScript status.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
+                // Get the current tab number.
+                int currentTabNumber = tabLayout.getSelectedTabPosition();
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // Delete the current tab.
+                tabLayout.removeTabAt(currentTabNumber);
 
-                // 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();
+                // Delete the current page.  If the selected page number did not change during the delete, it will return true, meaning that the current WebView must be reset.
+                if (webViewPagerAdapter.deletePage(currentTabNumber, webViewPager)) {
+                    setCurrentWebView(currentTabNumber);
                 }
+                break;
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
-
-            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 = "";
-
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+            case R.id.clear_and_exit:
+                // Close the bookmarks cursor and database.
+                bookmarksCursor.close();
+                bookmarksDatabaseHelper.close();
 
-                    // Put extra information instructing the domains activity to directly load the current domain and close on back instead of returning to the domains list.
-                    domainsIntent.putExtra("loadDomain", domainSettingsDatabaseId);
-                    domainsIntent.putExtra("closeOnBack", true);
+                // Get the status of the clear everything preference.
+                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                } else {  // Add a new domain.
-                    // Apply the new domain settings on returning to `MainWebViewActivity`.
-                    reapplyDomainSettingsOnRestart = true;
-                    currentDomainName = "";
+                // Get a handle for the runtime.
+                Runtime runtime = Runtime.getRuntime();
 
-                    // Get the current domain
-                    Uri currentUri = Uri.parse(formattedUrlString);
-                    String currentDomain = currentUri.getHost();
+                // 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;
 
-                    // 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);
+                // 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();
+                    }
 
-                    // Create the domain and store the database ID.
-                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
+                    // 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.
+                    }
+                }
 
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                // Clear DOM storage.
+                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
+                    // Ask `WebStorage` to clear the DOM storage.
+                    WebStorage webStorage = WebStorage.getInstance();
+                    webStorage.deleteAllData();
 
-                    // Put extra information instructing the domains activity to directly load the new domain and close on back instead of returning to the domains list.
-                    domainsIntent.putExtra("loadDomain", newDomainDatabaseId);
-                    domainsIntent.putExtra("closeOnBack", true);
+                    // 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/"});
 
-                    // Make it so.
-                    startActivity(domainsIntent);
+                        // 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.
+                    }
                 }
-                return true;
-
-            case R.id.toggle_first_party_cookies:
-                // Switch the status of firstPartyCookiesEnabled.
-                firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(firstPartyCookiesEnabled);
+                // 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();
 
-                // Apply the new cookie status.
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
+                    // 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.
+                    }
+                }
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // 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);
 
-                // 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();
-                }
+                        // Get the fragment view.
+                        View fragmentView = webViewTabFragment.getView();
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                        // Only clear the cache if the WebView exists.
+                        if (fragmentView != null) {
+                            // Get the nested scroll WebView from the tab fragment.
+                            NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-            case R.id.toggle_third_party_cookies:
-                if (Build.VERSION.SDK_INT >= 21) {
-                    // Switch the status of thirdPartyCookiesEnabled.
-                    thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
+                            // Clear the cache for this WebView.
+                            nestedScrollWebView.clearCache(true);
+                        }
+                    }
 
-                    // Update the menu checkbox.
-                    menuItem.setChecked(thirdPartyCookiesEnabled);
+                    // Manually delete the cache directories.
+                    try {
+                        // Delete the main cache directory.
+                        Process deleteCacheProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/cache");
 
-                    // Apply the new cookie status.
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
+                        // 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/"});
 
-                    // 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();
+                        // Wait until the processes have finished.
+                        deleteCacheProcess.waitFor();
+                        deleteServiceWorkerProcess.waitFor();
+                    } catch (Exception exception) {
+                        // Do nothing if an error is thrown.
                     }
+                }
 
-                    // Reload the WebView.
-                    mainWebView.reload();
-                } // Else do nothing because SDK < 21.
-                return true;
+                // Wipe out each WebView.
+                for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                    // Get the WebView tab fragment.
+                    WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            case R.id.toggle_dom_storage:
-                // Switch the status of domStorageEnabled.
-                domStorageEnabled = !domStorageEnabled;
+                    // Get the fragment view.
+                    View fragmentView = webViewTabFragment.getView();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(domStorageEnabled);
+                    // Only wipe out the WebView if it exists.
+                    if (fragmentView != null) {
+                        // Get the nested scroll WebView from the tab fragment.
+                        NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-                // Apply the new DOM Storage status.
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
+                        // Clear SSL certificate preferences for this WebView.
+                        nestedScrollWebView.clearSslPreferences();
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                        // Clear the back/forward history for this WebView.
+                        nestedScrollWebView.clearHistory();
 
-                // Display a `Snackbar`.
-                if (domStorageEnabled) {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
-                } else {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
+                        // Destroy the internal state of `mainWebView`.
+                        nestedScrollWebView.destroy();
+                    }
                 }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Clear the custom headers.
+                customHeaders.clear();
 
-            // Form data can be removed once the minimum API >= 26.
-            case R.id.toggle_save_form_data:
-                // Switch the status of saveFormDataEnabled.
-                saveFormDataEnabled = !saveFormDataEnabled;
+                // 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");
 
-                // Update the menu checkbox.
-                menuItem.setChecked(saveFormDataEnabled);
+                        // Wait until the process has finished.
+                        deleteAppWebviewProcess.waitFor();
+                    } catch (Exception exception) {
+                        // Do nothing if an error is thrown.
+                    }
+                }
+
+                // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    finishAndRemoveTask();
+                } else {
+                    finish();
+                }
 
-                // Apply the new form data status.
-                mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
+                // Remove the terminated program from RAM.  The status code is `0`.
+                System.exit(0);
+                break;
 
-                // Display a `Snackbar`.
-                if (saveFormDataEnabled) {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
+            case R.id.home:
+                // Select the homepage based on the proxy through Orbot status.
+                if (proxyThroughOrbot) {
+                    // Load the Tor homepage.
+                    loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
                 } else {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
+                    // Load the normal homepage.
+                    loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
                 }
+                break;
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+            case R.id.back:
+                if (currentWebView.canGoBack()) {
+                    // Reset the current domain name so that navigation works if third-party requests are blocked.
+                    currentWebView.resetCurrentDomainName();
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
+                    currentWebView.setNavigatingHistory(true);
 
-            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;
+                    // Load the previous website in the history.
+                    currentWebView.goBack();
+                }
+                break;
 
-            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();
-
-                                        // 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 {
-                                                // 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.
-                                            }
-                                        };
-
-                                        // Manually delete the DOM storage files after 200 milliseconds.
-                                        deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+            case R.id.forward:
+                if (currentWebView.canGoForward()) {
+                    // Reset the current domain name so that navigation works if third-party requests are blocked.
+                    currentWebView.resetCurrentDomainName();
 
-            // Form data can be remove once the minimum API >= 26.
-            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;
+                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
+                    currentWebView.setNavigatingHistory(true);
 
-            case R.id.easylist:
-                // Toggle the EasyList status.
-                easyListEnabled = !easyListEnabled;
+                    // Load the next website in the history.
+                    currentWebView.goForward();
+                }
+                break;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(easyListEnabled);
+            case R.id.history:
+                // Instantiate the URL history dialog.
+                DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+                // Show the URL history dialog.
+                urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
+                break;
 
-            case R.id.easyprivacy:
-                // Toggle the EasyPrivacy status.
-                easyPrivacyEnabled = !easyPrivacyEnabled;
+            case R.id.requests:
+                // Populate the resource requests.
+                RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(easyPrivacyEnabled);
+                // Create an intent to launch the Requests activity.
+                Intent requestsIntent = new Intent(this, RequestsActivity.class);
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+                // Add the block third-party requests status to the intent.
+                requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-            case R.id.fanboys_annoyance_list:
-                // Toggle Fanboy's Annoyance List status.
-                fanboysAnnoyanceListEnabled = !fanboysAnnoyanceListEnabled;
-
-                // Update the menu checkbox.
-                menuItem.setChecked(fanboysAnnoyanceListEnabled);
+                // Make it so.
+                startActivity(requestsIntent);
+                break;
 
-                // Update the staus of Fanboy's Social Blocking List.
-                MenuItem fanboysSocialBlockingListMenuItem = mainMenu.findItem(R.id.fanboys_social_blocking_list);
-                fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
+            case R.id.downloads:
+                // Launch the system Download Manager.
+                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+                // 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);
 
-            case R.id.fanboys_social_blocking_list:
-                // Toggle Fanboy's Social Blocking List status.
-                fanboysSocialBlockingListEnabled = !fanboysSocialBlockingListEnabled;
+                startActivity(downloadManagerIntent);
+                break;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(fanboysSocialBlockingListEnabled);
+            case R.id.domains:
+                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
+                reapplyDomainSettingsOnRestart = true;
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+                // Launch the domains activity.
+                Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-            case R.id.ultraprivacy:
-                // Toggle the UltraPrivacy status.
-                ultraPrivacyEnabled = !ultraPrivacyEnabled;
+                // 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);
+                }
 
-                // Update the menu checkbox.
-                menuItem.setChecked(ultraPrivacyEnabled);
+                // 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());
+                }
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+                // Make it so.
+                startActivity(domainsIntent);
+                break;
 
-            case R.id.block_all_third_party_requests:
-                //Toggle the third-party requests blocker status.
-                blockAllThirdPartyRequests = !blockAllThirdPartyRequests;
+            case R.id.settings:
+                // Set the flag to reapply app settings on restart when returning from Settings.
+                reapplyAppSettingsOnRestart = true;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(blockAllThirdPartyRequests);
+                // Set the flag to reapply the domain settings on restart when returning from Settings.
+                reapplyDomainSettingsOnRestart = true;
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+                // Launch the settings activity.
+                Intent settingsIntent = new Intent(this, SettingsActivity.class);
+                startActivity(settingsIntent);
+                break;
 
-            case R.id.user_agent_privacy_browser:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
+            case R.id.import_export:
+                // Launch the import/export activity.
+                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
+                startActivity(importExportIntent);
+                break;
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+            case R.id.logcat:
+                // Launch the logcat activity.
+                Intent logcatIntent = new Intent(this, LogcatActivity.class);
+                startActivity(logcatIntent);
+                break;
 
-            case R.id.user_agent_webview_default:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString("");
+            case R.id.guide:
+                // Launch `GuideActivity`.
+                Intent guideIntent = new Intent(this, GuideActivity.class);
+                startActivity(guideIntent);
+                break;
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+            case R.id.about:
+                // Create an intent to launch the about activity.
+                Intent aboutIntent = new Intent(this, AboutActivity.class);
 
-            case R.id.user_agent_firefox_on_android:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
+                // 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],
+                        ultraPrivacy.get(0).get(0)[0]};
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Add the blocklist versions to the intent.
+                aboutIntent.putExtra("blocklist_versions", blocklistVersions);
 
-            case R.id.user_agent_chrome_on_android:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
+                // Make it so.
+                startActivity(aboutIntent);
+                break;
+        }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Get a handle for the drawer layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-            case R.id.user_agent_safari_on_ios:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
+        // Close the navigation drawer.
+        drawerLayout.closeDrawer(GravityCompat.START);
+        return true;
+    }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+    @Override
+    public void onPostCreate(Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onPostCreate(savedInstanceState);
 
-            case R.id.user_agent_firefox_on_linux:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
+        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
+        actionBarDrawerToggle.syncState();
+    }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        // Run the default commands.
+        super.onConfigurationChanged(newConfig);
 
-            case R.id.user_agent_chromium_on_linux:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
 
-            case R.id.user_agent_firefox_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
+        // Recalculate the drawer header padding.
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Reload the ad for the free flavor if not in full screen mode.
+        if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
+            // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
+            AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
+        }
 
-            case R.id.user_agent_chrome_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
+        // `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);
+    }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
+        // Store the hit test result.
+        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
 
-            case R.id.user_agent_edge_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
+        // Create the URL strings.
+        final String imageUrl;
+        final String linkUrl;
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Get handles for the system managers.
+        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+        FragmentManager fragmentManager = getSupportFragmentManager();
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-            case R.id.user_agent_internet_explorer_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
+        // Remove the lint errors below that the clipboard manager might be null.
+        assert clipboardManager != null;
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // 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();
 
-            case R.id.user_agent_safari_on_macos:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Add a Load URL entry.
+                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Add a new tab.
+                    addTab(null);
 
-            case R.id.user_agent_custom:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
+                    // Load the URL.
+                    loadUrl(linkUrl);
+                    return false;
+                });
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(linkUrl);
+                    return false;
+                });
 
-            case R.id.font_size_twenty_five_percent:
-                mainWebView.getSettings().setTextZoom(25);
-                return true;
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(linkUrl);
+                    return false;
+                });
 
-            case R.id.font_size_fifty_percent:
-                mainWebView.getSettings().setTextZoom(50);
-                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);
 
-            case R.id.font_size_seventy_five_percent:
-                mainWebView.getSettings().setTextZoom(75);
-                return true;
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
+                    return false;
+                });
 
-            case R.id.font_size_one_hundred_percent:
-                mainWebView.getSettings().setTextZoom(100);
-                return true;
+                // Add a Download URL entry.
+                menu.add(R.string.download_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Check if the download should be processed by an external app.
+                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
+                        openUrlWithExternalApp(linkUrl);
+                    } else {  // Download with Android's download manager.
+                        // Check to see if the storage permission has already been granted.
+                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
+                            // Store the variables for future use by `onRequestPermissionsResult()`.
+                            downloadUrl = linkUrl;
+                            downloadContentDisposition = "none";
+                            downloadContentLength = -1;
 
-            case R.id.font_size_one_hundred_twenty_five_percent:
-                mainWebView.getSettings().setTextZoom(125);
-                return true;
+                            // Show a dialog if the user has previously denied the permission.
+                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
+                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
+                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
 
-            case R.id.font_size_one_hundred_fifty_percent:
-                mainWebView.getSettings().setTextZoom(150);
-                return true;
+                                // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
+                                downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
+                            } else {  // Show the permission request directly.
+                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
+                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
+                            }
+                        } else {  // The storage permission has already been granted.
+                            // Get a handle for the download file alert dialog.
+                            DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(linkUrl, "none", -1);
 
-            case R.id.font_size_one_hundred_seventy_five_percent:
-                mainWebView.getSettings().setTextZoom(175);
-                return true;
+                            // Show the download file alert dialog.
+                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
+                    return false;
+                });
 
-            case R.id.font_size_two_hundred_percent:
-                mainWebView.getSettings().setTextZoom(200);
-                return true;
+                // Add a Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
 
-            case R.id.swipe_to_refresh:
-                // Toggle swipe to refresh.
-                swipeRefreshLayout.setEnabled(!swipeRefreshLayout.isEnabled());
-                return true;
+            case WebView.HitTestResult.EMAIL_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
 
-            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);
-                }
-                return true;
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-            case R.id.night_mode:
-                // Toggle night mode.
-                nightMode = !nightMode;
+                // 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);
 
-                // Enable or disable JavaScript according to night mode, the global preference, and any domain settings.
-                if (nightMode) {  // Night mode is enabled.  Enable JavaScript.
-                    // Update the global variable.
-                    javaScriptEnabled = true;
-                } else if (domainSettingsApplied) {  // Night mode is disabled and domain settings are applied.  Set JavaScript according to the domain settings.
-                    // Get the JavaScript preference that was stored the last time domain settings were loaded.
-                    javaScriptEnabled = domainSettingsJavaScriptEnabled;
-                } else {  // Night mode is disabled and domain settings are not applied.  Set JavaScript according to the global preference.
-                    // Get a handle for the shared preference.
-                    SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                    // Parse the url and set it as the data for the `Intent`.
+                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
 
-                    // Get the JavaScript preference.
-                    javaScriptEnabled = sharedPreferences.getBoolean("javascript", 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);
 
-                // Apply the JavaScript setting to the WebView.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
+                    // Make it so.
+                    startActivity(emailIntent);
+                    return false;
+                });
 
-                // Update the privacy icons.
-                updatePrivacyIcons(false);
+                // 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);
 
-                // Reload the website.
-                mainWebView.reload();
-                return true;
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
+                    return false;
+                });
 
-            case R.id.print:
-                // Get a `PrintManager` instance.
-                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
+                break;
 
-                // Convert `mainWebView` to `printDocumentAdapter`.
-                PrintDocumentAdapter printDocumentAdapter = mainWebView.createPrintDocumentAdapter();
+            // `IMAGE_TYPE` is an image.
+            case WebView.HitTestResult.IMAGE_TYPE:
+                // Get the image URL.
+                imageUrl = hitTestResult.getExtra();
 
-                // Remove the lint error below that `printManager` might be `null`.
-                assert printManager != null;
+                // Set the image URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(imageUrl);
 
-                // Print the document.  The print attributes are `null`.
-                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
-                return true;
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
+                    loadUrl(imageUrl);
+                    return false;
+                });
 
-            case R.id.view_source:
-                // Launch the View Source activity.
-                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
-                startActivity(viewSourceIntent);
-                return true;
-
-            case R.id.proxy_through_orbot:
-                // Toggle the proxy through Orbot variable.
-                proxyThroughOrbot = !proxyThroughOrbot;
+                // Add a Download Image entry.
+                menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Check if the download should be processed by an external app.
+                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
+                        openUrlWithExternalApp(imageUrl);
+                    } else {  // Download with Android's download manager.
+                        // Check to see if the storage permission has already been granted.
+                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
+                            // Store the image URL for use by `onRequestPermissionResult()`.
+                            downloadImageUrl = imageUrl;
 
-                // Apply the proxy through Orbot settings.
-                applyProxyThroughOrbot(true);
-                return true;
+                            // Show a dialog if the user has previously denied the permission.
+                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
+                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
+                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
 
-            case R.id.share:
-                // Setup the share string.
-                String shareString = webViewTitle + " – " + urlTextBox.getText().toString();
+                                // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
+                                downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
+                            } else {  // Show the permission request directly.
+                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult().
+                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
+                            }
+                        } else {  // The storage permission has already been granted.
+                            // Get a handle for the download image alert dialog.
+                            DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
 
-                // Create the share intent.
-                Intent shareIntent = new Intent(Intent.ACTION_SEND);
-                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
-                shareIntent.setType("text/plain");
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
+                    return false;
+                });
 
-                // Make it so.
-                startActivity(Intent.createChooser(shareIntent, "Share URL"));
-                return true;
+                // 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);
 
-            case R.id.find_on_page:
-                // Hide the URL app bar.
-                supportAppBar.setVisibility(View.GONE);
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcImageTypeClipData);
+                    return false;
+                });
 
-                // Show the Find on Page `RelativeLayout`.
-                findOnPageLinearLayout.setVisibility(View.VISIBLE);
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(imageUrl);
+                    return false;
+                });
 
-                // 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();
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(imageUrl);
+                    return false;
+                });
 
-                    // Display the keyboard.  `0` sets no input flags.
-                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
-                }, 200);
-                return true;
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
+                break;
 
-            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));
 
-                //Everything else will be handled by `CreateHomeScreenShortcutDialog` and the associated listener below.
-                return true;
+            // `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();
 
-            case R.id.refresh:
-                if (menuItem.getTitle().equals(getString(R.string.refresh))) {  // The refresh button was pushed.
-                    // Reload the WebView.
-                    mainWebView.reload();
-                } else {  // The stop button was pushed.
-                    // Stop the loading of the WebView.
-                    mainWebView.stopLoading();
-                }
-                return true;
+                // Set the image URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(imageUrl);
 
-            case R.id.ad_consent:
-                // Display the ad consent dialog.
-                DialogFragment adConsentDialogFragment = new AdConsentDialog();
-                adConsentDialogFragment.show(getFragmentManager(), getString(R.string.ad_consent));
-                return true;
+                // Add a `View Image` entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
+                    loadUrl(imageUrl);
+                    return false;
+                });
 
-            default:
-                // Don't consume the event.
-                return super.onOptionsItemSelected(menuItem);
-        }
-    }
+                // Add a `Download Image` entry.
+                menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Check if the download should be processed by an external app.
+                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
+                        openUrlWithExternalApp(imageUrl);
+                    } else {  // Download with Android's download manager.
+                        // Check to see if the storage permission has already been granted.
+                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
+                            // Store the image URL for use by `onRequestPermissionResult()`.
+                            downloadImageUrl = imageUrl;
 
-    // removeAllCookies is deprecated, but it is required for API < 21.
-    @SuppressWarnings("deprecation")
-    @Override
-    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
-        int menuItemId = menuItem.getItemId();
+                            // Show a dialog if the user has previously denied the permission.
+                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
+                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
+                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
 
-        switch (menuItemId) {
-            case R.id.home:
-                loadUrl(homepage);
-                break;
+                                // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
+                                downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
+                            } else {  // Show the permission request directly.
+                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult().
+                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
+                            }
+                        } else {  // The storage permission has already been granted.
+                            // Get a handle for the download image alert dialog.
+                            DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
 
-            case R.id.back:
-                if (mainWebView.canGoBack()) {
-                    // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
-                    formattedUrlString = "";
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
+                    return false;
+                });
 
-                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-                    navigatingHistory = true;
+                // 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);
 
-                    // Load the previous website in the history.
-                    mainWebView.goBack();
-                }
-                break;
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
+                    return false;
+                });
 
-            case R.id.forward:
-                if (mainWebView.canGoForward()) {
-                    // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
-                    formattedUrlString = "";
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(imageUrl);
+                    return false;
+                });
 
-                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-                    navigatingHistory = true;
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(imageUrl);
+                    return false;
+                });
 
-                    // Load the next website in the history.
-                    mainWebView.goForward();
-                }
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
                 break;
+        }
+    }
 
-            case R.id.history:
-                // Get the `WebBackForwardList`.
-                WebBackForwardList webBackForwardList = mainWebView.copyBackForwardList();
-
-                // 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;
+    @Override
+    public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
 
-            case R.id.requests:
-                // Launch the requests activity.
-                Intent requestsIntent = new Intent(this, RequestsActivity.class);
-                startActivity(requestsIntent);
-                break;
+        // Get the views from the dialog fragment.
+        EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
+        EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
 
-            case R.id.downloads:
-                // Launch the system Download Manager.
-                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+        // Extract the strings from the edit texts.
+        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 
-                // 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);
+        // Create a favorite icon byte array output stream.
+        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                startActivity(downloadManagerIntent);
-                break;
+        // 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);
 
-            case R.id.domains:
-                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
-                reapplyDomainSettingsOnRestart = true;
-                currentDomainName = "";
+        // Convert the favorite icon byte array stream to a byte array.
+        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
-                // Launch the domains activity.
-                Intent domainsIntent = new Intent(this, DomainsActivity.class);
-                startActivity(domainsIntent);
-                break;
+        // Display the new bookmark below the current items in the (0 indexed) list.
+        int newBookmarkDisplayOrder = bookmarksListView.getCount();
 
-            case R.id.settings:
-                // Set the flag to reapply app settings on restart when returning from Settings.
-                reapplyAppSettingsOnRestart = true;
+        // Create the bookmark.
+        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 
-                // Set the flag to reapply the domain settings on restart when returning from Settings.
-                reapplyDomainSettingsOnRestart = true;
-                currentDomainName = "";
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Launch the settings activity.
-                Intent settingsIntent = new Intent(this, SettingsActivity.class);
-                startActivity(settingsIntent);
-                break;
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-            case R.id.import_export:
-                // Launch the import/export activity.
-                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
-                startActivity(importExportIntent);
-                break;
+        // Scroll to the new bookmark.
+        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+    }
 
-            case R.id.guide:
-                // Launch `GuideActivity`.
-                Intent guideIntent = new Intent(this, GuideActivity.class);
-                startActivity(guideIntent);
-                break;
+    @Override
+    public void onCreateBookmarkFolder(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
 
-            case R.id.about:
-                // Launch `AboutActivity`.
-                Intent aboutIntent = new Intent(this, AboutActivity.class);
-                startActivity(aboutIntent);
-                break;
+        // Get handles for the views in the dialog fragment.
+        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);
 
-            case R.id.clearAndExit:
-                // Close the bookmarks cursor and database.
-                bookmarksCursor.close();
-                bookmarksDatabaseHelper.close();
+        // Get new folder name string.
+        String folderNameString = createFolderNameEditText.getText().toString();
 
-                // Get a handle for `sharedPreferences`.  `this` references the current context.
-                SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        // Create a folder icon bitmap.
+        Bitmap folderIconBitmap;
 
-                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+        // Set the folder icon bitmap according to the dialog.
+        if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
+            // Get the default folder icon drawable.
+            Drawable folderIconDrawable = folderIconImageView.getDrawable();
 
-                // 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();
-                    }
+            // Convert the folder icon drawable to a bitmap drawable.
+            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                    // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
-                    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.
-                    }
-                }
+            // 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;
+        }
 
-                // Clear DOM storage.
-                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
-                    // Ask `WebStorage` to clear the DOM storage.
-                    WebStorage webStorage = WebStorage.getInstance();
-                    webStorage.deleteAllData();
+        // Create a folder icon byte array output stream.
+        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                    // 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/"});
+        // 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);
 
-                        // 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.
-                    }
-                }
+        // Convert the folder icon byte array stream to a byte array.
+        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 
-                // 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();
-
-                    // 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.
-                    }
-                }
-
-                // Clear the cache.
-                if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
-                    // `true` includes disk files.
-                    mainWebView.clearCache(true);
-
-                    // Manually delete the cache directories.
-                    try {
-                        // Delete the main cache directory.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+        // 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);
+        }
 
-                        // 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.
-                        privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
-                    } catch (IOException e) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+        // Create the folder, which will be placed at the top of the `ListView`.
+        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
 
-                // Clear SSL certificate preferences.
-                mainWebView.clearSslPreferences();
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Clear the back/forward history.
-                mainWebView.clearHistory();
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-                // Clear `formattedUrlString`.
-                formattedUrlString = null;
+        // Scroll to the new folder.
+        bookmarksListView.setSelection(0);
+    }
 
-                // Clear `customHeaders`.
-                customHeaders.clear();
+    @Override
+    public void onSaveBookmark(DialogFragment dialogFragment, int selectedBookmarkDatabaseId, Bitmap favoriteIconBitmap) {
+        // 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);
 
-                // Detach all views from `mainWebViewRelativeLayout`.
-                mainWebViewRelativeLayout.removeAllViews();
+        // Store the bookmark strings.
+        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 
-                // Destroy the internal state of `mainWebView`.
-                mainWebView.destroy();
+        // 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.
+            // Create a favorite icon byte array output stream.
+            ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // 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.
-                    }
-                }
+            // 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, newFavoriteIconByteArrayOutputStream);
 
-                // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    finishAndRemoveTask();
-                } else {
-                    finish();
-                }
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 
-                // Remove the terminated program from RAM.  The status code is `0`.
-                System.exit(0);
-                break;
+            //  Update the bookmark and the favorite icon.
+            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
         }
 
-        // Close the navigation drawer.
-        drawerLayout.closeDrawer(GravityCompat.START);
-        return true;
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
     }
 
     @Override
-    public void onPostCreate(Bundle savedInstanceState) {
-        super.onPostCreate(savedInstanceState);
+    public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, Bitmap favoriteIconBitmap) {
+        // 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 defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
 
-        // Sync the state of the DrawerToggle after onRestoreInstanceState has finished.
-        drawerToggle.syncState();
-    }
+        // Get the new folder name.
+        String newFolderNameString = editFolderNameEditText.getText().toString();
 
-    @Override
-    public void onConfigurationChanged(Configuration newConfig) {
-        super.onConfigurationChanged(newConfig);
+        // 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;
 
-        // Reload the ad for the free flavor if we not in full screen mode.
-        if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
-            // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-            AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
-        }
+            // Populate the new folder icon bitmap.
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable.
+                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 
-        // `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);
-    }
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-    @Override
-    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
-        // Store the `HitTestResult`.
-        final WebView.HitTestResult hitTestResult = mainWebView.getHitTestResult();
+                // 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 strings.
-        final String imageUrl;
-        final String linkUrl;
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-        // Get a handle for the `ClipboardManager`.
-        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+            // 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);
 
-        // Remove the lint errors below that `clipboardManager` might be `null`.
-        assert clipboardManager != null;
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-        switch (hitTestResult.getType()) {
-            // `SRC_ANCHOR_TYPE` is a link.
-            case WebView.HitTestResult.SRC_ANCHOR_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
+            // 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();
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                // Add a Load URL entry.
-                menu.add(R.string.load_url).setOnMenuItemClickListener((MenuItem item) -> {
-                    loadUrl(linkUrl);
-                    return false;
-                });
+                // 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;
+            }
 
-                // 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);
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
-                    return 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);
 
-                // Add a Download URL entry.
-                menu.add(R.string.download_url).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Check if the download should be processed by an external app.
-                    if (downloadWithExternalApp) {  // Download with an external app.
-                        openUrlWithExternalApp(linkUrl);
-                    } else {  // Download with Android's download manager.
-                        // Check to see if the storage permission has already been granted.
-                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
-                            // Store the variables for future use by `onRequestPermissionsResult()`.
-                            downloadUrl = linkUrl;
-                            downloadContentDisposition = "none";
-                            downloadContentLength = -1;
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-                            // Show a dialog if the user has previously denied the permission.
-                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
-                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
-                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
+            // Update the folder name and icon in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
+        }
 
-                                // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
-                                downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
-                            } else {  // Show the permission request directly.
-                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
-                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
-                            }
-                        } else {  // The storage permission has already been granted.
-                            // Get a handle for the download file alert dialog.
-                            AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(linkUrl, "none", -1);
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                            // Show the download file alert dialog.
-                            downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
+    @Override
+    public void onCloseDownloadLocationPermissionDialog(int downloadType) {
+        switch (downloadType) {
+            case DownloadLocationPermissionDialog.DOWNLOAD_FILE:
+                // Request the WRITE_EXTERNAL_STORAGE permission with a file request code.
+                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
                 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);
+            case DownloadLocationPermissionDialog.DOWNLOAD_IMAGE:
+                // Request the WRITE_EXTERNAL_STORAGE permission with an image request code.
+                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
+                break;
+        }
+    }
 
-                // 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);
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        // Get a handle for the fragment manager.
+        FragmentManager fragmentManager = getSupportFragmentManager();
 
-                    // Parse the url and set it as the data for the `Intent`.
-                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
+        switch (requestCode) {
+            case DOWNLOAD_FILE_REQUEST_CODE:
+                // Show the download file alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
+                DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(downloadUrl, downloadContentDisposition, downloadContentLength);
 
-                    // `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);
+                // On API 23, displaying the fragment must be delayed or the app will crash.
+                if (Build.VERSION.SDK_INT == 23) {
+                    new Handler().postDelayed(() -> downloadFileDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
+                } else {
+                    downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
+                }
 
-                    // Make it so.
-                    startActivity(emailIntent);
-                    return false;
-                });
+                // Reset the download variables.
+                downloadUrl = "";
+                downloadContentDisposition = "";
+                downloadContentLength = 0;
+                break;
 
-                // 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);
+            case DOWNLOAD_IMAGE_REQUEST_CODE:
+                // Show the download image alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
+                DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(downloadImageUrl);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
-                    return false;
-                });
+                // On API 23, displaying the fragment must be delayed or the app will crash.
+                if (Build.VERSION.SDK_INT == 23) {
+                    new Handler().postDelayed(() -> downloadImageDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
+                } else {
+                    downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                }
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
+                // Reset the image URL variable.
+                downloadImageUrl = "";
                 break;
+        }
+    }
 
-            // `IMAGE_TYPE` is an image.
-            case WebView.HitTestResult.IMAGE_TYPE:
-                // Get the image URL.
-                imageUrl = hitTestResult.getExtra();
+    @Override
+    public void onDownloadImage(DialogFragment 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);
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+            // Parse `imageUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
 
-                // 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) -> {
-                    // Check if the download should be processed by an external app.
-                    if (downloadWithExternalApp) {  // Download with an external app.
-                        openUrlWithExternalApp(imageUrl);
-                    } else {  // Download with Android's download manager.
-                        // Check to see if the storage permission has already been granted.
-                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
-                            // Store the image URL for use by `onRequestPermissionResult()`.
-                            downloadImageUrl = 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 (cookieManager.acceptCookie()) {
+                // 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);
+            }
+
+            // Get the file name from the dialog fragment.
+            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
+            String imageName = downloadImageNameEditText.getText().toString();
+
+            // Specify the download location.
+            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
+                // Download to the public download directory.
+                downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, imageName);
+            } else {  // External write permission denied.
+                // Download to the app's external download directory.
+                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, imageName);
+            }
+
+            // 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(imageUrl);
+
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+
+            // Remove the lint warning below that `downloadManager` might be `null`.
+            assert downloadManager != null;
+
+            // Initiate the download.
+            downloadManager.enqueue(downloadRequest);
+        } else {  // The image is not an HTTP or HTTPS URI.
+            Snackbar.make(currentWebView, R.string.cannot_download_image, Snackbar.LENGTH_INDEFINITE).show();
+        }
+    }
+
+    @Override
+    public void onDownloadFile(DialogFragment dialogFragment, String downloadUrl) {
+        // Download the file if it has an HTTP or HTTPS URI.
+        if (downloadUrl.startsWith("http")) {
+            // Get a handle for the system `DOWNLOAD_SERVICE`.
+            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
+
+            // Parse `downloadUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
+
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
+
+            // 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 (cookieManager.acceptCookie()) {
+                // Get the cookies for `downloadUrl`.
+                String cookies = cookieManager.getCookie(downloadUrl);
+
+                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
+                downloadRequest.addRequestHeader("Cookie", cookies);
+            }
+
+            // Get the file name from the dialog fragment.
+            EditText downloadFileNameEditText = dialogFragment.getDialog().findViewById(R.id.download_file_name);
+            String fileName = downloadFileNameEditText.getText().toString();
+
+            // Specify the download location.
+            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
+                // Download to the public download directory.
+                downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
+            } else {  // External write permission denied.
+                // Download to the app's external download directory.
+                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, fileName);
+            }
+
+            // 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);
+
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+
+            // Remove the lint warning below that `downloadManager` might be `null`.
+            assert downloadManager != null;
+
+            // Initiate the download.
+            downloadManager.enqueue(downloadRequest);
+        } else {  // The download is not an HTTP or HTTPS URI.
+            Snackbar.make(currentWebView, R.string.cannot_download_file, Snackbar.LENGTH_INDEFINITE).show();
+        }
+    }
+
+    // Override `onBackPressed` to handle the navigation drawer and and the WebView.
+    @Override
+    public void onBackPressed() {
+        // Get a handle for the drawer layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+
+        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.getParentFolderName(currentBookmarksFolder);
+
+                // Load the new folder.
+                loadBookmarksFolder();
+            }
+        } else if (currentWebView.canGoBack()) {  // There is at least one item in the current WebView history.
+            // Reset the current domain name so that navigation works if third-party requests are blocked.
+            currentWebView.resetCurrentDomainName();
+
+            // Set navigating history so that the domain settings are applied when the new URL is loaded.
+            currentWebView.setNavigatingHistory(true);
+
+            // Go back.
+            currentWebView.goBack();
+        } else {  // There is nothing else to do.
+            // Load a blank website.
+            loadUrl("");
+        }
+    }
+
+    // Process the results of an upload file chooser.  Currently there is only one `startActivityForResult` in this activity, so the request code, used to differentiate them, is ignored.
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        // 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, data));
+        }
+    }
+
+    private void loadUrlFromTextBox() {
+        // Get a handle for the URL edit text.
+        EditText urlEditText = findViewById(R.id.url_edittext);
+
+        // 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();
+            }
+
+            // 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;
+
+            // Build the URI.
+            Uri.Builder uri = new Uri.Builder();
+            uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
+
+            // 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.
+            }
+        } else if (!unformattedUrlString.isEmpty()){  // This is not a URL, but rather a search string.
+            // Create an encoded URL String.
+            String encodedUrlString;
+
+            // Sanitize the search input.
+            try {
+                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                encodedUrlString = "";
+            }
+
+            // Add the base search URL.
+            url = searchURL + encodedUrlString;
+        }
+
+        // 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();
+
+        // Make it so.
+        loadUrl(url);
+    }
+
+    private void loadUrl(String url) {
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, url, true, false);
+
+        // Load the URL.
+        currentWebView.loadUrl(url, customHeaders);
+    }
+
+    public void findPreviousOnPage(View view) {
+        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
+        currentWebView.findNext(false);
+    }
+
+    public void findNextOnPage(View view) {
+        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
+        currentWebView.findNext(true);
+    }
+
+    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);
+
+        // Delete the contents of `find_on_page_edittext`.
+        findOnPageEditText.setText(null);
+
+        // Clear the highlighted phrases.
+        currentWebView.clearMatches();
+
+        // Hide the find on page linear layout.
+        findOnPageLinearLayout.setVisibility(View.GONE);
+
+        // Show the toolbar.
+        toolbar.setVisibility(View.VISIBLE);
+
+        // 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;
+
+        // Hide the keyboard.
+        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+    }
+
+    private void applyAppSettings() {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+        // Store the values from the shared preferences in variables.
+        incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
+        boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
+        proxyThroughOrbot = sharedPreferences.getBoolean("proxy_through_orbot", false);
+        fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
+        hideAppBar = sharedPreferences.getBoolean("hide_app_bar", true);
+        scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
+
+        // Get handles for the views that need to be modified.
+        FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+        AppBarLayout appBarLayout = findViewById(R.id.appbar_layout);
+        ActionBar actionBar = getSupportActionBar();
+        LinearLayout tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+
+        // Remove the incorrect lint warning below that the action bar might be null.
+        assert actionBar != null;
+
+        // Apply the proxy through Orbot settings.
+        applyProxyThroughOrbot(false);
+
+        // 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.
+        CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
+
+        // Add the scrolling behavior to the layout parameters.
+        if (scrollAppBar) {
+            // Enable scrolling of the app bar.
+            layoutParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());
+        } else {
+            // Disable scrolling of the app bar.
+            layoutParams.setBehavior(null);
+
+            // Expand the app bar if it is currently collapsed.
+            appBarLayout.setExpanded(true);
+        }
+
+        // Apply the modified layout parameters to the swipe refresh layout.
+        swipeRefreshLayout.setLayoutParams(layoutParams);
+
+        // 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);
+
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
+
+            // 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);
+            }
+        }
+
+        // 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);
+
+                // Hide the action bar.
+                actionBar.hide();
+            } else {
+                // Show the tab linear layout.
+                tabsLinearLayout.setVisibility(View.VISIBLE);
+
+                // Show the action bar.
+                actionBar.show();
+            }
+
+            // Hide the banner ad in the free flavor.
+            if (BuildConfig.FLAVOR.contentEquals("free")) {
+                AdHelper.hideAd(findViewById(R.id.adview));
+            }
+
+            // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+
+            /* 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);
+
+            // Show the action bar.
+            actionBar.show();
+
+            // Show the banner ad in the free flavor.
+            if (BuildConfig.FLAVOR.contentEquals("free")) {
+                // Initialize the ads.  If this isn't the first run, `loadAd()` will be automatically called instead.
+                AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getSupportFragmentManager(), getString(R.string.google_app_id), getString(R.string.ad_unit_id));
+            }
+
+            // Remove the `SYSTEM_UI` flags from the root frame layout.
+            rootFrameLayout.setSystemUiVisibility(0);
+
+            // Add the translucent status flag.
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+        }
+    }
+
+
+    // `reloadWebsite` is used if returning from the Domains activity.  Otherwise JavaScript might not function correctly if it is newly enabled.
+    @SuppressLint("SetJavaScriptEnabled")
+    private boolean applyDomainSettings(NestedScrollWebView nestedScrollWebView, String url, boolean resetTab, boolean reloadWebsite) {
+        // Store a copy of the current user agent to track changes for the return boolean.
+        String initialUserAgent = nestedScrollWebView.getSettings().getUserAgentString();
+
+        // Parse the URL into a URI.
+        Uri uri = Uri.parse(url);
+
+        // Extract the domain from `uri`.
+        String newHostName = uri.getHost();
+
+        // Strings don't like to be null.
+        if (newHostName == null) {
+            newHostName = "";
+        }
+
+        // Only apply the domain settings if a new domain is being loaded.  This allows the user to set temporary settings for JavaScript, cookies, DOM storage, etc.
+        if (!nestedScrollWebView.getCurrentDomainName().equals(newHostName)) {
+            // Set the new host name as the current domain name.
+            nestedScrollWebView.setCurrentDomainName(newHostName);
+
+            // Reset the ignoring of pinned domain information.
+            nestedScrollWebView.setIgnorePinnedDomainInformation(false);
+
+            // Clear any pinned SSL certificate or IP addresses.
+            nestedScrollWebView.clearPinnedSslCertificate();
+            nestedScrollWebView.clearPinnedIpAddresses();
+
+            // Reset the favorite icon if specified.
+            if (resetTab) {
+                // Initialize the favorite icon.
+                nestedScrollWebView.initializeFavoriteIcon();
+
+                // Get the current page position.
+                int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
+
+                // Get a handle for the tab layout.
+                TabLayout tabLayout = findViewById(R.id.tablayout);
+
+                // Get the corresponding tab.
+                TabLayout.Tab tab = tabLayout.getTabAt(currentPagePosition);
+
+                // Remove the warning below that the tab might be null.
+                assert tab != null;
+
+                // Get the tab custom view.
+                View tabCustomView = tab.getCustomView();
+
+                // Remove the warning below that the tab custom view might be null.
+                assert tabCustomView != null;
+
+                // Get the tab views.
+                ImageView tabFavoriteIconImageView = tabCustomView.findViewById(R.id.favorite_icon_imageview);
+                TextView tabTitleTextView = tabCustomView.findViewById(R.id.title_textview);
+
+                // Set the default favorite icon as the favorite icon for this tab.
+                tabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(nestedScrollWebView.getFavoriteOrDefaultIcon(), 64, 64, true));
+
+                // Set the loading title text.
+                tabTitleTextView.setText(R.string.loading);
+            }
+
+            // 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);
+
+            // Get a full cursor from `domainsDatabaseHelper`.
+            Cursor domainNameCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
+
+            // Initialize `domainSettingsSet`.
+            Set<String> domainSettingsSet = new HashSet<>();
+
+            // Get the domain name column index.
+            int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
+
+            // 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));
+            }
+
+            // Close `domainNameCursor.
+            domainNameCursor.close();
+
+            // Initialize the domain name in database variable.
+            String domainNameInDatabase = null;
+
+            // 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;
+
+                // 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);
+            }
+
+            // 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);
+
+                    // Store the applied domain names as it appears in the database.
+                    domainNameInDatabase = "*." + newHostName;
+                }
+
+                // Strip out the lowest subdomain of of the host name.
+                newHostName = newHostName.substring(newHostName.indexOf(".") + 1);
+            }
+
+
+            // Get a handle for the shared preferences.
+            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+            // 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);
+            boolean displayWebpageImages = sharedPreferences.getBoolean("display_webpage_images", true);
+            boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
+
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
+
+            // Get handles for the views.
+            RelativeLayout urlRelativeLayout = findViewById(R.id.url_relativelayout);
+            SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+
+            // 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);
+
+            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();
+
+                // Get the settings from the cursor.
+                nestedScrollWebView.setDomainSettingsDatabaseId(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper._ID)));
+                nestedScrollWebView.setDomainSettingsJavaScriptEnabled(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.EASY_LIST,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYLIST)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY,
+                        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.ULTRA_PRIVACY,
+                        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 nightModeInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.NIGHT_MODE));
+                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));
+
+                // Create 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 (currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_START_DATE)) == 0) {
+                    pinnedSslStartDate = null;
+                } else {
+                    pinnedSslStartDate = new Date(currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_START_DATE)));
+                }
+
+                // 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 (currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_END_DATE)) == 0) {
+                    pinnedSslEndDate = null;
+                } else {
+                    pinnedSslEndDate = new Date(currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_END_DATE)));
+                }
+
+                // If there is a pinned SSL certificate, store it in the WebView.
+                if (pinnedSslCertificate) {
+                    nestedScrollWebView.setPinnedSslCertificate(pinnedSslIssuedToCName, pinnedSslIssuedToOName, pinnedSslIssuedToUName, pinnedSslIssuedByCName, pinnedSslIssuedByOName, pinnedSslIssuedByUName,
+                            pinnedSslStartDate, pinnedSslEndDate);
+                }
+
+                // If there is a pinned IP address, store it in the WebView.
+                if (pinnedIpAddresses) {
+                    nestedScrollWebView.setPinnedIpAddresses(pinnedHostIpAddresses);
+                }
+
+                // Set night mode according to the night mode int.
+                switch (nightModeInt) {
+                    case DomainsDatabaseHelper.NIGHT_MODE_SYSTEM_DEFAULT:
+                        // Set night mode according to the current default.
+                        nestedScrollWebView.setNightMode(sharedPreferences.getBoolean("night_mode", false));
+                        break;
+
+                    case DomainsDatabaseHelper.NIGHT_MODE_ENABLED:
+                        // Enable night mode.
+                        nestedScrollWebView.setNightMode(true);
+                        break;
+
+                    case DomainsDatabaseHelper.NIGHT_MODE_DISABLED:
+                        // Disable night mode.
+                        nestedScrollWebView.setNightMode(false);
+                        break;
+                }
+
+                // Enable JavaScript if night mode is enabled.
+                if (nestedScrollWebView.getNightMode()) {
+                    // Enable JavaScript.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(true);
+                } else {
+                    // Set JavaScript according to the domain settings.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(nestedScrollWebView.getDomainSettingsJavaScriptEnabled());
+                }
+
+                // Close the current host domain settings cursor.
+                currentDomainSettingsCursor.close();
+
+                // Apply the domain settings.
+                cookieManager.setAcceptCookie(nestedScrollWebView.getAcceptFirstPartyCookies());
+
+                // Set third-party cookies status if API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, domainThirdPartyCookiesEnabled);
+                }
+
+                // Apply the form data setting if the API < 26.
+                if (Build.VERSION.SDK_INT < 26) {
+                    nestedScrollWebView.getSettings().setSaveFormData(saveFormData);
+                }
+
+                // Apply the font size.
+                if (fontSize == 0) {  // Apply the default font size.
+                    nestedScrollWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
+                } else {  // Apply the specified font size.
+                    nestedScrollWebView.getSettings().setTextZoom(fontSize);
+                }
+
+                // 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 (nestedScrollWebView.getProgress() == 100) {  // A URL is not loading.
+                    // 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);
+
+                        // 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;
+
+                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                                // Set the user agent to `""`, which uses the default value.
+                                nestedScrollWebView.getSettings().setUserAgentString("");
+                                break;
+
+                            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;
+
+                            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);
+
+                        switch (userAgentArrayPosition) {
+                            case UNRECOGNIZED_USER_AGENT:  // The user agent name contains a custom user agent.
+                                nestedScrollWebView.getSettings().setUserAgentString(userAgentName);
+                                break;
+
+                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                                // Set the user agent to `""`, which uses the default value.
+                                nestedScrollWebView.getSettings().setUserAgentString("");
+                                break;
+
+                            default:
+                                // Get the user agent string from the user agent data array.
+                                nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                        }
+                    }
+                }
+
+                // Set swipe to refresh.
+                switch (swipeToRefreshInt) {
+                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_SYSTEM_DEFAULT:
+                        // Store the swipe to refresh status in the nested scroll WebView.
+                        nestedScrollWebView.setSwipeToRefresh(defaultSwipeToRefresh);
+
+                        // Apply swipe to refresh according to the default.  This can be removed once the minimum API >= 23 because it is continuously set by an on scroll change listener.
+                        swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
+                        break;
+
+                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_ENABLED:
+                        // Store the swipe to refresh status in the nested scroll WebView.
+                        nestedScrollWebView.setSwipeToRefresh(true);
+
+                        // Enable swipe to refresh.  This can be removed once the minimum API >= 23 because it is continuously set by an on scroll change listener.
+                        swipeRefreshLayout.setEnabled(true);
+                        break;
+
+                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_DISABLED:
+                        // Store the swipe to refresh status in the nested scroll WebView.
+                        nestedScrollWebView.setSwipeToRefresh(false);
+
+                        // Disable swipe to refresh.  This can be removed once the minimum API >= 23 because it is continuously set by an on scroll change listener.
+                        swipeRefreshLayout.setEnabled(false);
+                }
+
+                // Set the loading of webpage images.
+                switch (displayWebpageImagesInt) {
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
+                        break;
+
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(true);
+                        break;
+
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(false);
+                        break;
+                }
+
+                // Set a green background on the URL relative layout to indicate that custom domain settings are being used. The deprecated `.getDrawable()` must be used until the minimum API >= 21.
+                if (darkTheme) {
+                    urlRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_dark_blue));
+                } else {
+                    urlRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_light_green));
+                }
+            } else {  // The new URL does not have custom domain settings.  Load the defaults.
+                // Store the values from the shared preferences.
+                boolean defaultJavaScriptEnabled = 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.EASY_LIST, sharedPreferences.getBoolean("easylist", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY, 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.ULTRA_PRIVACY, sharedPreferences.getBoolean("ultraprivacy", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, sharedPreferences.getBoolean("block_all_third_party_requests", false));
+                nestedScrollWebView.setNightMode(sharedPreferences.getBoolean("night_mode", false));
+
+                // Enable JavaScript if night mode is enabled.
+                if (nestedScrollWebView.getNightMode()) {
+                    // Enable JavaScript.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(true);
+                } else {
+                    // Set JavaScript according to the domain settings.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(defaultJavaScriptEnabled);
+                }
+
+                // Apply the default settings.
+                cookieManager.setAcceptCookie(nestedScrollWebView.getAcceptFirstPartyCookies());
+                nestedScrollWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
+
+                // Apply the form data setting if the API < 26.
+                if (Build.VERSION.SDK_INT < 26) {
+                    nestedScrollWebView.getSettings().setSaveFormData(saveFormData);
+                }
+
+                // Store the swipe to refresh status in the nested scroll WebView.
+                nestedScrollWebView.setSwipeToRefresh(defaultSwipeToRefresh);
+
+                // Apply swipe to refresh according to the default.
+                swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
+
+                // Reset the pinned variables.
+                nestedScrollWebView.setDomainSettingsDatabaseId(-1);
+
+                // Set third-party cookies status if API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, defaultThirdPartyCookiesEnabled);
+                }
+
+                // 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 (nestedScrollWebView.getProgress() == 100) {  // A URL is not loading.
+                    // Get the array position of the user agent name.
+                    int userAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
+
+                    // 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;
 
-                            // Show a dialog if the user has previously denied the permission.
-                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
-                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
-                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
+                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                            // Set the user agent to `""`, which uses the default value.
+                            nestedScrollWebView.getSettings().setUserAgentString("");
+                            break;
 
-                                // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
-                                downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
-                            } else {  // Show the permission request directly.
-                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult().
-                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
-                            }
-                        } else {  // The storage permission has already been granted.
-                            // Get a handle for the download image alert dialog.
-                            AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
+                        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;
 
-                            // Show the download image alert dialog.
-                            downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                        }
+                        default:
+                            // Get the user agent string from the user agent data array
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
                     }
-                    return false;
-                });
+                }
 
-                // 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);
+                // Set the loading of webpage images.
+                nestedScrollWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageTypeClipData);
-                    return false;
-                });
+                // Set a transparent background on URL edit text.  The deprecated `getResources().getDrawable()` must be used until the minimum API >= 21.
+                urlRelativeLayout.setBackground(getResources().getDrawable(R.color.transparent));
+            }
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+            // Close the domains database helper.
+            domainsDatabaseHelper.close();
 
+            // Update the privacy icons.
+            updatePrivacyIcons(true);
+        }
 
-            // `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();
+        // Reload the website if returning from the Domains activity.
+        if (reloadWebsite) {
+            nestedScrollWebView.reload();
+        }
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+        // Return the user agent changed status.
+        return !nestedScrollWebView.getSettings().getUserAgentString().equals(initialUserAgent);
+    }
 
-                // Add a `View Image` entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+    private void applyProxyThroughOrbot(boolean reloadWebsite) {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                // Add a `Download Image` entry.
-                menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Check if the download should be processed by an external app.
-                    if (downloadWithExternalApp) {  // Download with an external app.
-                        openUrlWithExternalApp(imageUrl);
-                    } else {  // Download with Android's download manager.
-                        // Check to see if the storage permission has already been granted.
-                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
-                            // Store the image URL for use by `onRequestPermissionResult()`.
-                            downloadImageUrl = imageUrl;
+        // Get the search and theme preferences.
+        String torSearchString = sharedPreferences.getString("tor_search", getString(R.string.tor_search_default_value));
+        String torSearchCustomUrlString = sharedPreferences.getString("tor_search_custom_url", getString(R.string.tor_search_custom_url_default_value));
+        String searchString = sharedPreferences.getString("search", getString(R.string.search_default_value));
+        String searchCustomUrlString = sharedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value));
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-                            // Show a dialog if the user has previously denied the permission.
-                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
-                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
-                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
+        // Get a handle for the action bar.  `getSupportActionBar()` must be used until the minimum API >= 21.
+        ActionBar actionBar = getSupportActionBar();
 
-                                // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
-                                downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
-                            } else {  // Show the permission request directly.
-                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult().
-                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
-                            }
-                        } else {  // The storage permission has already been granted.
-                            // Get a handle for the download image alert dialog.
-                            AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
+        // Remove the incorrect lint warning later that the action bar might be null.
+        assert actionBar != null;
 
-                            // Show the download image alert dialog.
-                            downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                        }
+        // Set the homepage, search, and proxy options.
+        if (proxyThroughOrbot) {  // Set the Tor options.
+            // 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;
+            }
+
+            // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
+            OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
+
+            // Set the `appBar` background to indicate proxying through Orbot is enabled.
+            if (darkTheme) {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.dark_blue_30));
+            } else {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.blue_50));
+            }
+
+            // Check to see if Orbot is ready.
+            if (!orbotStatus.equals("ON")) {  // Orbot is not ready.
+                // Set `waitingForOrbot`.
+                waitingForOrbot = true;
+
+                // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
+                currentWebView.getSettings().setUseWideViewPort(false);
+
+                // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
+                currentWebView.loadData("<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>", "text/html", null);
+            } else if (reloadWebsite) {  // Orbot is ready and the website should be reloaded.
+                // Reload the website.
+                currentWebView.reload();
+            }
+        } else {  // Set the non-Tor options.
+            // 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;
+            }
+
+            // Reset the proxy to default.  The host is `""` and the port is `"0"`.
+            OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
+
+            // Set the default `appBar` background.
+            if (darkTheme) {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_900));
+            } else {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_100));
+            }
+
+            // Reset `waitingForOrbot.
+            waitingForOrbot = false;
+
+            // Reload the WebViews if requested.
+            if (reloadWebsite) {
+                // Reload the WebViews.
+                for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                    // Get the WebView tab fragment.
+                    WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+
+                    // Get the fragment view.
+                    View fragmentView = webViewTabFragment.getView();
+
+                    // 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);
+
+                        // Reload the WebView.
+                        nestedScrollWebView.reload();
                     }
-                    return false;
-                });
+                }
+            }
+        }
+    }
 
-                // 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);
+    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)) {
+            // Get a handle for the shared preferences.
+            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
-                    return false;
-                });
+            // Get the theme and screenshot preferences.
+            boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
+
+            // Get handles for the menu items.
+            MenuItem privacyMenuItem = optionsMenu.findItem(R.id.toggle_javascript);
+            MenuItem firstPartyCookiesMenuItem = optionsMenu.findItem(R.id.toggle_first_party_cookies);
+            MenuItem domStorageMenuItem = optionsMenu.findItem(R.id.toggle_dom_storage);
+            MenuItem refreshMenuItem = optionsMenu.findItem(R.id.refresh);
+
+            // Update the privacy icon.
+            if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is enabled.
+                privacyMenuItem.setIcon(R.drawable.javascript_enabled);
+            } else if (currentWebView.getAcceptFirstPartyCookies()) {  // JavaScript is disabled but cookies are enabled.
+                privacyMenuItem.setIcon(R.drawable.warning);
+            } else {  // All the dangerous features are disabled.
+                privacyMenuItem.setIcon(R.drawable.privacy_mode);
+            }
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+            // Update the first-party cookies icon.
+            if (currentWebView.getAcceptFirstPartyCookies()) {  // First-party cookies are enabled.
+                firstPartyCookiesMenuItem.setIcon(R.drawable.cookies_enabled);
+            } else {  // First-party cookies are disabled.
+                if (darkTheme) {
+                    firstPartyCookiesMenuItem.setIcon(R.drawable.cookies_disabled_dark);
+                } else {
+                    firstPartyCookiesMenuItem.setIcon(R.drawable.cookies_disabled_light);
+                }
+            }
+
+            // Update the DOM storage icon.
+            if (currentWebView.getSettings().getJavaScriptEnabled() && currentWebView.getSettings().getDomStorageEnabled()) {  // Both JavaScript and DOM storage are enabled.
+                domStorageMenuItem.setIcon(R.drawable.dom_storage_enabled);
+            } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is enabled but DOM storage is disabled.
+                if (darkTheme) {
+                    domStorageMenuItem.setIcon(R.drawable.dom_storage_disabled_dark);
+                } else {
+                    domStorageMenuItem.setIcon(R.drawable.dom_storage_disabled_light);
+                }
+            } else {  // JavaScript is disabled, so DOM storage is ghosted.
+                if (darkTheme) {
+                    domStorageMenuItem.setIcon(R.drawable.dom_storage_ghosted_dark);
+                } else {
+                    domStorageMenuItem.setIcon(R.drawable.dom_storage_ghosted_light);
+                }
+            }
+
+            // Update the refresh icon.
+            if (darkTheme) {
+                refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
+            } else {
+                refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
+            }
+
+            // `invalidateOptionsMenu` calls `onPrepareOptionsMenu()` and redraws the icons in the `AppBar`.
+            if (runInvalidateOptionsMenu) {
+                invalidateOptionsMenu();
+            }
         }
     }
 
-    @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);
+    private void openUrlWithExternalApp(String url) {
+        // Create a download intent.  Not specifying the action type will display the maximum number of options.
+        Intent downloadIntent = new Intent();
 
-        // Extract the strings from the `EditTexts`.
-        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
+        // Set the URI and the MIME type.  Specifying `text/html` displays a good number of options.
+        downloadIntent.setDataAndType(Uri.parse(url), "text/html");
 
-        // 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();
+        // Flag the intent to open in a new task.
+        downloadIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-        // Display the new bookmark below the current items in the (0 indexed) list.
-        int newBookmarkDisplayOrder = bookmarksListView.getCount();
+        // Show the chooser.
+        startActivity(Intent.createChooser(downloadIntent, getString(R.string.open_with)));
+    }
 
-        // Create the bookmark.
-        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
+    private void highlightUrlText() {
+        // Get a handle for the URL edit text.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+        // Only highlight the URL text if the box is not currently selected.
+        if (!urlEditText.hasFocus()) {
+            // Get the URL string.
+            String urlString = urlEditText.getText().toString();
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+            // Highlight the URL according to the protocol.
+            if (urlString.startsWith("file://")) {  // This is a file URL.
+                // De-emphasize only the protocol.
+                urlEditText.getText().setSpan(initialGrayColorSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+            } else if (urlString.startsWith("content://")) {
+                // De-emphasize only the protocol.
+                urlEditText.getText().setSpan(initialGrayColorSpan, 0, 10, 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;
+                }
 
-        // Scroll to the new bookmark.
-        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+                // Get the index of the last `.` in the domain.
+                int lastDotIndex = baseUrl.lastIndexOf(".");
+
+                // Get the index of the penultimate `.` in the domain.
+                int penultimateDotIndex = baseUrl.lastIndexOf(".", lastDotIndex - 1);
+
+                // 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);
+
+                    // 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);
+                    }
+                }
+
+                // De-emphasize the text after the domain name.
+                if (endOfDomainName > 0) {
+                    urlEditText.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+                }
+            }
+        }
     }
 
-    @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);
+    private void loadBookmarksFolder() {
+        // Update the bookmarks cursor with the contents of the bookmarks database for the current folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+
+        // 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);
+            }
+
+            @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);
+
+                // Get the favorite icon byte array from the cursor.
+                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
+
+                // 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 bitmap in `bookmarkFavoriteIcon`.
+                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
+
+                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
+                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+                bookmarkNameTextView.setText(bookmarkNameString);
+
+                // 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);
+                }
+            }
+        };
 
-        // Get new folder name string.
-        String folderNameString = createFolderNameEditText.getText().toString();
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
 
-        // 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;
-        }
+        // Populate the list view with the adapter.
+        bookmarksListView.setAdapter(bookmarksCursorAdapter);
 
-        // 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();
+        // Get a handle for the bookmarks title text view.
+        TextView bookmarksTitleTextView = findViewById(R.id.bookmarks_title_textview);
 
-        // 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);
+        // Set the bookmarks drawer title.
+        if (currentBookmarksFolder.isEmpty()) {
+            bookmarksTitleTextView.setText(R.string.bookmarks);
+        } else {
+            bookmarksTitleTextView.setText(currentBookmarksFolder);
         }
+    }
 
-        // Create the folder, which will be placed at the top of the `ListView`.
-        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
+    private void openWithApp(String url) {
+        // Create the open with intent with `ACTION_VIEW`.
+        Intent openWithAppIntent = new Intent(Intent.ACTION_VIEW);
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+        // Set the URI but not the MIME type.  This should open all available apps.
+        openWithAppIntent.setData(Uri.parse(url));
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+        // Flag the intent to open in a new task.
+        openWithAppIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-        // Scroll to the new folder.
-        bookmarksListView.setSelection(0);
+        // Show the chooser.
+        startActivity(openWithAppIntent);
     }
 
-    @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();
-
-        // Convert the favorite icon bitmap to an `Icon`.  `IconCompat` is required until API >= 26.
-        IconCompat favoriteIcon = IconCompat.createWithBitmap(favoriteIconBitmap);
-
-        // Setup the shortcut intent.
-        Intent shortcutIntent = new Intent(Intent.ACTION_VIEW);
-        shortcutIntent.setData(Uri.parse(formattedUrlString));
+    private void openWithBrowser(String url) {
+        // Create the open with intent with `ACTION_VIEW`.
+        Intent openWithBrowserIntent = new Intent(Intent.ACTION_VIEW);
 
-        // Create a shortcut info builder.  The shortcut name becomes the shortcut ID.
-        ShortcutInfoCompat.Builder shortcutInfoBuilder = new ShortcutInfoCompat.Builder(this, shortcutNameString);
+        // Set the URI and the MIME type.  `"text/html"` should load browser options.
+        openWithBrowserIntent.setDataAndType(Uri.parse(url), "text/html");
 
-        // Add the required fields to the shortcut info builder.
-        shortcutInfoBuilder.setIcon(favoriteIcon);
-        shortcutInfoBuilder.setIntent(shortcutIntent);
-        shortcutInfoBuilder.setShortLabel(shortcutNameString);
+        // Flag the intent to open in a new task.
+        openWithBrowserIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-        // Request the pin.  `ShortcutManagerCompat` can be switched to `ShortcutManager` once API >= 26.
-        ShortcutManagerCompat.requestPinShortcut(this, shortcutInfoBuilder.build(), null);
+        // Show the chooser.
+        startActivity(openWithBrowserIntent);
     }
 
-    @Override
-    public void onCloseDownloadLocationPermissionDialog(int downloadType) {
-        switch (downloadType) {
-            case DownloadLocationPermissionDialog.DOWNLOAD_FILE:
-                // Request the WRITE_EXTERNAL_STORAGE permission with a file request code.
-                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
-                break;
-
-            case DownloadLocationPermissionDialog.DOWNLOAD_IMAGE:
-                // Request the WRITE_EXTERNAL_STORAGE permission with an image request code.
-                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
-                break;
-        }
-    }
+    public void addTab(View view) {
+        // Get a handle for the tab layout and the view pager.
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+        ViewPager webViewPager = findViewById(R.id.webviewpager);
 
-    @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
-        switch (requestCode) {
-            case DOWNLOAD_FILE_REQUEST_CODE:
-                // Show the download file alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
-                AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(downloadUrl, downloadContentDisposition, downloadContentLength);
+        // 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();
 
-                // On API 23, displaying the fragment must be delayed or the app will crash.
-                if (Build.VERSION.SDK_INT == 23) {
-                    new Handler().postDelayed(() -> downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download)), 500);
-                } else {
-                    downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                }
+        // Add a new tab.
+        tabLayout.addTab(tabLayout.newTab());
 
-                // Reset the download variables.
-                downloadUrl = "";
-                downloadContentDisposition = "";
-                downloadContentLength = 0;
-                break;
+        // Get the new tab.
+        TabLayout.Tab newTab = tabLayout.getTabAt(newTabNumber);
 
-            case DOWNLOAD_IMAGE_REQUEST_CODE:
-                // Show the download image alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
-                AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(downloadImageUrl);
+        // Remove the lint warning below that the current tab might be null.
+        assert newTab != null;
 
-                // On API 23, displaying the fragment must be delayed or the app will crash.
-                if (Build.VERSION.SDK_INT == 23) {
-                    new Handler().postDelayed(() -> downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download)), 500);
-                } else {
-                    downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                }
+        // Set a custom view on the new tab.
+        newTab.setCustomView(R.layout.tab_custom_view);
 
-                // Reset the image URL variable.
-                downloadImageUrl = "";
-                break;
-        }
+        // Add the new WebView page.
+        webViewPagerAdapter.addPage(newTabNumber, webViewPager);
     }
 
-    @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));
+    private void setCurrentWebView(int pageNumber) {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-            // 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);
+        // Get the theme preference.
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
-            }
+        // Get handles for the URL views.
+        RelativeLayout urlRelativeLayout = findViewById(R.id.url_relativelayout);
+        EditText urlEditText = findViewById(R.id.url_edittext);
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 
-            // Get the file name from the dialog fragment.
-            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
-            String imageName = downloadImageNameEditText.getText().toString();
+        //Stop the swipe to refresh indicator if it is running
+        swipeRefreshLayout.setRefreshing(false);
 
-            // Specify the download location.
-            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
-                // Download to the public download directory.
-                downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, imageName);
-            } else {  // External write permission denied.
-                // Download to the app's external download directory.
-                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, imageName);
-            }
+        // Get the WebView tab fragment.
+        WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(pageNumber);
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+        // Get the fragment view.
+        View fragmentView = webViewTabFragment.getView();
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(imageUrl);
+        // Set the current WebView if the fragment view is not null.
+        if (fragmentView != null) {
+            // Store the current WebView.
+            currentWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+            // Update the status of swipe to refresh.
+            if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
+                if (Build.VERSION.SDK_INT >= 23) {  // For API >= 23, swipe refresh layout is continuously updated with an on scroll change listener and only enabled if the WebView is scrolled to the top.
+                    // Enable the swipe refresh layout if the WebView is scrolled all the way to the top.
+                    swipeRefreshLayout.setEnabled(currentWebView.getY() == 0);
+                } else {
+                    // Enable the swipe refresh layout.
+                    swipeRefreshLayout.setEnabled(true);
+                }
+            } else {  // Swipe to refresh is disabled.
+                // Disable the swipe refresh layout.
+                swipeRefreshLayout.setEnabled(false);
+            }
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
 
-            // 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();
-        }
-    }
+            // Set the first-party cookie status.
+            cookieManager.setAcceptCookie(currentWebView.getAcceptFirstPartyCookies());
 
-    @Override
-    public void onDownloadFile(AppCompatDialogFragment dialogFragment, String downloadUrl) {
-        // Download the file if it has an HTTP or HTTPS URI.
-        if (downloadUrl.startsWith("http")) {
-            // Get a handle for the system `DOWNLOAD_SERVICE`.
-            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
+            // Update the privacy icons.  `true` redraws the icons in the app bar.
+            updatePrivacyIcons(true);
 
-            // Parse `downloadUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
+            // Get a handle for the input method manager.
+            InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-            // 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);
+            // Remove the lint warning below that the input method manager might be null.
+            assert inputMethodManager != null;
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
-            }
+            // Get the current URL.
+            String url = currentWebView.getUrl();
 
-            // Get the file name from the dialog fragment.
-            EditText downloadFileNameEditText = dialogFragment.getDialog().findViewById(R.id.download_file_name);
-            String fileName = downloadFileNameEditText.getText().toString();
+            if ((url == null) || url.equals("about:blank")) {  // The WebView is blank.
+                // Display the hint in the URL edit text.
+                urlEditText.setText("");
 
-            // Specify the download location.
-            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
-                // Download to the public download directory.
-                downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
-            } else {  // External write permission denied.
-                // Download to the app's external download directory.
-                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, fileName);
-            }
+                // Request focus for the URL text box.
+                urlEditText.requestFocus();
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+                // Display the keyboard.
+                inputMethodManager.showSoftInput(urlEditText, 0);
+            } else {  // The WebView has a loaded URL.
+                // Clear the focus from the URL text box.
+                urlEditText.clearFocus();
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(downloadUrl);
+                // Hide the soft keyboard.
+                inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+                // Display the current URL in the URL text box.
+                urlEditText.setText(url);
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+                // Highlight the URL text.
+                highlightUrlText();
+            }
 
-            // 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();
+            // Set the background to indicate the domain settings status.
+            if (currentWebView.getDomainSettingsApplied()) {
+                // Set a green background on the URL relative layout to indicate that custom domain settings are being used. The deprecated `.getDrawable()` must be used until the minimum API >= 21.
+                if (darkTheme) {
+                    urlRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_dark_blue));
+                } else {
+                    urlRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_light_green));
+                }
+            } else {
+                urlRelativeLayout.setBackground(getResources().getDrawable(R.color.transparent));
+            }
         }
     }
 
     @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);
+    public void initializeWebView(NestedScrollWebView nestedScrollWebView, int pageNumber, ProgressBar progressBar) {
+        // Get handles for the activity views.
+        FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+        RelativeLayout mainContentRelativeLayout = findViewById(R.id.main_content_relativelayout);
+        ActionBar actionBar = getSupportActionBar();
+        LinearLayout tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
+        EditText urlEditText = findViewById(R.id.url_edittext);
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+
+        // Remove the incorrect lint warning below that the action bar might be null.
+        assert actionBar != null;
+
+        // Get a handle for the activity
+        Activity activity = this;
 
-        // Store the bookmark strings.
-        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
+        // Get a handle for the input method manager.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-        // 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();
+        // Instantiate the blocklist helper.
+        BlockListHelper blockListHelper = new BlockListHelper();
 
-            //  Update the bookmark and the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
-        }
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+        // Get the relevant preferences.
+        boolean downloadWithExternalApp = sharedPreferences.getBoolean("download_with_external_app", false);
 
-    @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);
+        // Initialize the favorite icon.
+        nestedScrollWebView.initializeFavoriteIcon();
 
-        // Get the new folder name.
-        String newFolderNameString = editFolderNameEditText.getText().toString();
+        // Set the app bar scrolling.
+        nestedScrollWebView.setNestedScrollingEnabled(sharedPreferences.getBoolean("scroll_app_bar", true));
 
-        // 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;
-            }
+        // Allow pinch to zoom.
+        nestedScrollWebView.getSettings().setBuiltInZoomControls(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();
+        // Hide zoom controls.
+        nestedScrollWebView.getSettings().setDisplayZoomControls(false);
 
-            // 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;
-            }
+        // 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);
+        }
 
-            // 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();
+        // Set the WebView to use a wide viewport.  Otherwise, some web pages will be scrunched and some content will render outside the screen.
+        nestedScrollWebView.getSettings().setUseWideViewPort(true);
 
-            // Update the folder name and icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, 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);
-    }
+        // 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 onHttpAuthenticationCancel() {
-        // Cancel the `HttpAuthHandler`.
-        httpAuthHandler.cancel();
-    }
+                    // Toggle the full screen browsing mode.
+                    if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
+                        // Store the swipe refresh layout top padding.
+                        swipeRefreshLayoutPaddingTop = swipeRefreshLayout.getPaddingTop();
 
-    @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 app bar if specified.
+                        if (hideAppBar) {
+                            // Close the find on page bar if it is visible.
+                            closeFindOnPage(null);
 
-        // Proceed with the HTTP authentication.
-        httpAuthHandler.proceed(usernameEditText.getText().toString(), passwordEditText.getText().toString());
-    }
+                            // Hide the tab linear layout.
+                            tabsLinearLayout.setVisibility(View.GONE);
 
-    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));
-    }
+                            // Hide the action bar.
+                            actionBar.hide();
 
-    @Override
-    public void onSslErrorCancel() {
-        sslErrorHandler.cancel();
-    }
+                            // Check to see if app bar scrolling is disabled.
+                            if (!scrollAppBar) {
+                                // Remove the padding from the top of the swipe refresh layout.
+                                swipeRefreshLayout.setPadding(0, 0, 0, 0);
+                            }
+                        }
 
-    @Override
-    public void onSslErrorProceed() {
-        sslErrorHandler.proceed();
-    }
+                        // Hide the banner ad in the free flavor.
+                        if (BuildConfig.FLAVOR.contentEquals("free")) {
+                            AdHelper.hideAd(findViewById(R.id.adview));
+                        }
 
-    @Override
-    public void onSslMismatchBack() {
-        if (mainWebView.canGoBack()) {  // There is a back page in the history.
-            // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
-            formattedUrlString = "";
+                        // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+
+                        /* 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 tab linear layout.
+                        tabsLinearLayout.setVisibility(View.VISIBLE);
+
+                        // Show the action bar.
+                        actionBar.show();
+
+                        // Check to see if app bar scrolling is disabled.
+                        if (!scrollAppBar) {
+                            // Add the padding from the top of the swipe refresh layout.
+                            swipeRefreshLayout.setPadding(0, swipeRefreshLayoutPaddingTop, 0, 0);
+                        }
 
-            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-            navigatingHistory = true;
+                        // Show the banner ad in the free flavor.
+                        if (BuildConfig.FLAVOR.contentEquals("free")) {
+                            // Reload the ad.
+                            AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
+                        }
 
-            // Go back.
-            mainWebView.goBack();
-        } else {  // There are no pages to go back to.
-            // Load a blank page
-            loadUrl("");
-        }
-    }
+                        // Remove the `SYSTEM_UI` flags from the root frame layout.
+                        rootFrameLayout.setSystemUiVisibility(0);
 
-    @Override
-    public void onSslMismatchProceed() {
-        // Do not check the pinned SSL certificate for this domain again until the domain changes.
-        ignorePinnedSslCertificate = true;
-    }
+                        // Add the translucent status flag.
+                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                    }
 
-    @Override
-    public void onUrlHistoryEntrySelected(int moveBackOrForwardSteps) {
-        // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
-        formattedUrlString = "";
+                    // Consume the double-tap.
+                    return true;
+                } else { // Do not consume the double-tap because full screen browsing mode is disabled.
+                    return false;
+                }
+            }
+        });
 
-        // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-        navigatingHistory = true;
+        // 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();
 
-        // Load the history entry.
-        mainWebView.goBackOrForward(moveBackOrForwardSteps);
-    }
+            // Send the event to the gesture detector.
+            return doubleTapGestureDetector.onTouchEvent(event);
+        });
 
-    @Override
-    public void onClearHistory() {
-        // Clear the history.
-        mainWebView.clearHistory();
-    }
+        // Register the WebView for a context menu.  This is used to see link targets and download images.
+        registerForContextMenu(nestedScrollWebView);
 
-    // 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);
+        // Allow the downloading of files.
+        nestedScrollWebView.setDownloadListener((String url, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
+            // Check if the download should be processed by an external app.
+            if (downloadWithExternalApp) {  // Download with an external app.
+                // Create a download intent.  Not specifying the action type will display the maximum number of options.
+                Intent downloadIntent = new Intent();
 
-                // Load the new folder.
-                loadBookmarksFolder();
-            }
+                // Set the URI and the MIME type.  Specifying `text/html` displays a good number of options.
+                downloadIntent.setDataAndType(Uri.parse(url), "text/html");
 
-        } else if (mainWebView.canGoBack()) {  // There is at least one item in the `WebView` history.
-            // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
-            formattedUrlString = "";
+                // Flag the intent to open in a new task.
+                downloadIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-            navigatingHistory = true;
+                // Show the chooser.
+                startActivity(Intent.createChooser(downloadIntent, getString(R.string.open_with)));
+            } else {  // Download with Android's download manager.
+                // Check to see if the WRITE_EXTERNAL_STORAGE permission has already been granted.
+                if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission has not been granted.
+                    // The WRITE_EXTERNAL_STORAGE permission needs to be requested.
 
-            // Go back.
-            mainWebView.goBack();
-        } else {  // There isn't anything to do in Privacy Browser.
-            // Pass `onBackPressed()` to the system.
-            super.onBackPressed();
-        }
-    }
+                    // Store the variables for future use by `onRequestPermissionsResult()`.
+                    downloadUrl = url;
+                    downloadContentDisposition = contentDisposition;
+                    downloadContentLength = contentLength;
 
-    // Process the results of an upload file chooser.  Currently there is only one `startActivityForResult` in this activity, so the request code, used to differentiate them, is ignored.
-    @Override
-    public void onActivityResult(int requestCode, int resultCode, Intent data) {
-        // 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, data));
-        }
-    }
+                    // Show a dialog if the user has previously denied the permission.
+                    if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
+                        // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
+                        DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
 
-    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 = urlTextBox.getText().toString().trim();
+                        // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
+                        downloadLocationPermissionDialogFragment.show(getSupportFragmentManager(), getString(R.string.download_location));
+                    } else {  // Show the permission request directly.
+                        // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
+                        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
+                    }
+                } else {  // The storage permission has already been granted.
+                    // Get a handle for the download file alert dialog.
+                    DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
 
-        // 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 `https://` at the beginning if it is missing.  Otherwise the app will segfault.
-            if (!unformattedUrlString.startsWith("http")) {
-                unformattedUrlString = "https://" + unformattedUrlString;
+                    // Show the download file alert dialog.
+                    downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
+                }
             }
+        });
 
-            // 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();
-            }
+        // 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);
 
-            // 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 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;
 
-            // Build the URI.
-            Uri.Builder formattedUri = new Uri.Builder();
-            formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
+                    // Build the match string.
+                    String matchString = activeMatch + "/" + numberOfMatches;
 
-            // Decode `formattedUri` as a `String` in `UTF-8`.
-            try {
-                formattedUrlString = URLDecoder.decode(formattedUri.build().toString(), "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                // Load a blank string.
-                formattedUrlString = "";
+                    // Set `findOnPageCountTextView`.
+                    findOnPageCountTextView.setText(matchString);
+                }
             }
-        } else if (unformattedUrlString.isEmpty()){  // Load a blank web site.
-            // Load a blank string.
-            formattedUrlString = "";
-        } else {  // Search for the contents of the URL box.
-            // Create an encoded URL String.
-            String encodedUrlString;
+        });
 
-            // Sanitize the search input.
-            try {
-                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
+        // Update the status of swipe to refresh based on the scroll position of the nested scroll WebView.
+        // Once the minimum API >= 23 this can be replaced with `nestedScrollWebView.setOnScrollChangeListener()`.
+        nestedScrollWebView.getViewTreeObserver().addOnScrollChangedListener(() -> {
+            if (nestedScrollWebView.getSwipeToRefresh()) {
+                // Only enable swipe to refresh if the WebView is scrolled to the top.
+                swipeRefreshLayout.setEnabled(nestedScrollWebView.getScrollY() == 0);
             }
+        });
 
-            // Add the base search URL.
-            formattedUrlString = searchURL + encodedUrlString;
-        }
+        // 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) {
+                // Inject the night mode CSS if night mode is enabled.
+                if (nestedScrollWebView.getNightMode()) {  // Night mode is enabled.
+                    // `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.
+                    // `::selection {background: #0D47A1}' sets the text selection highlight color to be a dark blue. `!important` takes precedent over any existing sub-settings.
+                    nestedScrollWebView.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;} ::selection {background: #0D47A1 !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 gone.  This prevents the display of the `WebView` while it is still loading.
+                            if (progressBar.getVisibility() == View.GONE) {
+                                nestedScrollWebView.setVisibility(View.VISIBLE);
+                            }
+                        };
 
-        // 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();
+                        // Display the WebView after 500 milliseconds.
+                        displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
+                    });
+                } else {  // Night mode is disabled.
+                    // Display the nested scroll WebView 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.
+                    nestedScrollWebView.setVisibility(View.VISIBLE);
+                }
 
-        // Make it so.
-        loadUrl(formattedUrlString);
-    }
+                // Update the progress bar.
+                progressBar.setProgress(progress);
 
-    private void loadUrl(String url) {// Apply any custom domain settings.
-        // Set the URL as the formatted URL string so that checking third-party requests works correctly.
-        formattedUrlString = url;
+                // 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);
 
-        // Apply the domain settings.
-        applyDomainSettings(url, true, false);
+                    //Stop the swipe to refresh indicator if it is running
+                    swipeRefreshLayout.setRefreshing(false);
+                }
+            }
 
-        // If loading a website, set `urlIsLoading` to prevent changes in the user agent on websites with redirects from reloading the current website.
-        urlIsLoading = !url.equals("");
+            // 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);
 
-        // Load the URL.
-        mainWebView.loadUrl(url, customHeaders);
-    }
+                    // Get the current page position.
+                    int currentPosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-    public void findPreviousOnPage(View view) {
-        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
-        mainWebView.findNext(false);
-    }
+                    // Get the current tab.
+                    TabLayout.Tab tab = tabLayout.getTabAt(currentPosition);
 
-    public void findNextOnPage(View view) {
-        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
-        mainWebView.findNext(true);
-    }
+                    // Check to see if the tab has been populated.
+                    if (tab != null) {
+                        // Get the custom view from the tab.
+                        View tabView = tab.getCustomView();
 
-    public void closeFindOnPage(View view) {
-        // Delete the contents of `find_on_page_edittext`.
-        findOnPageEditText.setText(null);
+                        // 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);
 
-        // Clear the highlighted phrases.
-        mainWebView.clearMatches();
+                            // Display the favorite icon in the tab.
+                            tabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
+                        }
+                    }
+                }
+            }
 
-        // Hide the Find on Page `RelativeLayout`.
-        findOnPageLinearLayout.setVisibility(View.GONE);
+            // 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());
 
-        // Show the URL app bar.
-        supportAppBar.setVisibility(View.VISIBLE);
+                // Get the current tab.
+                TabLayout.Tab tab = tabLayout.getTabAt(currentPosition);
 
-        // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
-        inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
-    }
+                // 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();
 
-    private void applyAppSettings() {
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                    // Remove the incorrect warning below that the current tab view might be null.
+                    assert tabView != null;
 
-        // Store the values from the shared preferences in variables.
-        incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
-        boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
-        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);
-        downloadWithExternalApp = sharedPreferences.getBoolean("download_with_external_app", false);
+                    // Get the title text view from the tab.
+                    TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
 
-        // Apply the proxy through Orbot settings.
-        applyProxyThroughOrbot(false);
+                    // Set the title as the tab text.
+                    tabTitleTextView.setText(title);
+                }
+            }
 
-        // Set Do Not Track status.
-        if (doNotTrackEnabled) {
-            customHeaders.put("DNT", "1");
-        } else {
-            customHeaders.remove("DNT");
-        }
+            // Enter full screen video.
+            @Override
+            public void onShowCustomView(View video, CustomViewCallback callback) {
+                // Get a handle for the full screen video frame layout.
+                FrameLayout fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
 
-        // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
-        if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
-            if (hideSystemBarsOnFullscreen) {  // Hide everything.
-                // Remove the translucent navigation setting if it is currently flagged.
-                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+                // Set the full screen video flag.
+                displayingFullScreenVideo = true;
 
-                // Remove the translucent status bar overlay.
-                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                // Pause the ad if this is the free flavor.
+                if (BuildConfig.FLAVOR.contentEquals("free")) {
+                    // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
+                    AdHelper.pauseAd(findViewById(R.id.adview));
+                }
+
+                // Hide the keyboard.
+                inputMethodManager.hideSoftInputFromWindow(nestedScrollWebView.getWindowToken(), 0);
+
+                // Hide the main content relative layout.
+                mainContentRelativeLayout.setVisibility(View.GONE);
 
                 // 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.
+                // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+
+                /* 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.
                  */
-                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.
-                // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                rootCoordinatorLayout.setSystemUiVisibility(0);
+                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);
 
-                // Add the translucent status flag if it is unset.
-                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                // Disable the sliding drawers.
+                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 
-                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);
-                }
-            }
-        } 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;
+                // Add the video view to the full screen video frame layout.
+                fullScreenVideoFrameLayout.addView(video);
 
-            // Show the `appBar` if `findOnPageLinearLayout` is not visible.
-            if (findOnPageLinearLayout.getVisibility() == View.GONE) {
-                appBar.show();
+                // Show the full screen video frame layout.
+                fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
             }
 
-            // Show the `BannerAd` in the free flavor.
-            if (BuildConfig.FLAVOR.contentEquals("free")) {
-                // Initialize the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-                AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getFragmentManager(), getString(R.string.google_app_id), getString(R.string.ad_unit_id));
-            }
+            // Exit full screen video.
+            @Override
+            public void onHideCustomView() {
+                // Get a handle for the full screen video frame layout.
+                FrameLayout fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
+
+                // Unset the full screen video flag.
+                displayingFullScreenVideo = false;
 
-            // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-            rootCoordinatorLayout.setSystemUiVisibility(0);
+                // Remove all the views from the full screen video frame layout.
+                fullScreenVideoFrameLayout.removeAllViews();
 
-            // Remove the translucent navigation bar flag if it is set.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+                // Hide the full screen video frame layout.
+                fullScreenVideoFrameLayout.setVisibility(View.GONE);
 
-            // 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);
+                // Enable the sliding drawers.
+                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 
-            // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-            rootCoordinatorLayout.setFitsSystemWindows(true);
-        }
-    }
+                // Show the main content relative layout.
+                mainContentRelativeLayout.setVisibility(View.VISIBLE);
 
-    // `reloadWebsite` is used if returning from the Domains activity.  Otherwise JavaScript might not function correctly if it is newly enabled.
-    // The deprecated `.getDrawable()` must be used until the minimum API >= 21.
-    @SuppressWarnings("deprecation")
-    private boolean applyDomainSettings(String url, boolean resetFavoriteIcon, boolean reloadWebsite) {
-        // Get the current user agent.
-        String initialUserAgent = mainWebView.getSettings().getUserAgentString();
+                // 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);
+
+                        // Hide the action bar.
+                        actionBar.hide();
+                    }
+
+                    // Hide the banner ad in the free flavor.
+                    if (BuildConfig.FLAVOR.contentEquals("free")) {
+                        AdHelper.hideAd(findViewById(R.id.adview));
+                    }
+
+                    // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+                    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+
+                    /* 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);
+
+                    // Add the translucent status flag.
+                    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) {
+                    // Reload the ad.
+                    AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
+                }
+            }
+
+            // 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;
 
-        // Initialize a variable to track if the user agent changes.
-        boolean userAgentChanged = false;
+                    // Create an intent to open a chooser based ont the file chooser parameters.
+                    Intent fileChooserIntent = fileChooserParams.createIntent();
 
-        // Parse the URL into a URI.
-        Uri uri = Uri.parse(url);
+                    // Open the file chooser.  Currently only one `startActivityForResult` exists in this activity, so the request code, used to differentiate them, is simply `0`.
+                    startActivityForResult(fileChooserIntent, 0);
+                }
+                return true;
+            }
+        });
 
-        // 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);
-        }
+        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) {
+                if (url.startsWith("http")) {  // Load the URL in Privacy Browser.
+                    // Apply the domain settings for the new URL.  This doesn't do anything if the domain has not changed.
+                    boolean userAgentChanged = applyDomainSettings(nestedScrollWebView, url, true, false);
 
-        // Strings don't like to be null.
-        if (hostName == null) {
-            hostName = "";
-        }
+                    // Check if the user agent has changed.
+                    if (userAgentChanged) {
+                        // Manually load the URL.  The changing of the user agent will cause WebView to reload the previous URL.
+                        nestedScrollWebView.loadUrl(url, customHeaders);
 
-        // Only apply the domain settings if a new domain is being loaded.  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;
+                        // Returning true indicates that Privacy Browser is manually handling the loading of the URL.
+                        return true;
+                    } else {
+                        // Returning false causes the current WebView to handle the URL and prevents it from adding redirects to the history list.
+                        return false;
+                    }
+                } 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);
 
-            // Reset `ignorePinnedSslCertificate`.
-            ignorePinnedSslCertificate = false;
+                    // Parse the url and set it as the data for the intent.
+                    emailIntent.setData(Uri.parse(url));
 
-            // Reset the favorite icon if specified.
-            if (resetFavoriteIcon) {
-                favoriteIconBitmap = favoriteIconDefaultBitmap;
-                favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(favoriteIconBitmap, 64, 64, true));
-            }
+                    // Open the email program in a new task instead of as part of Privacy Browser.
+                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            // 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);
+                    // Make it so.
+                    startActivity(emailIntent);
 
-            // Get a full cursor from `domainsDatabaseHelper`.
-            Cursor domainNameCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
+                    // 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);
 
-            // Initialize `domainSettingsSet`.
-            Set<String> domainSettingsSet = new HashSet<>();
+                    // Add the phone number to the intent.
+                    dialIntent.setData(Uri.parse(url));
 
-            // Get the domain name column index.
-            int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
+                    // Open the dialer in a new task instead of as part of Privacy Browser.
+                    dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            // Populate `domainSettingsSet`.
-            for (int i = 0; i < domainNameCursor.getCount(); i++) {
-                // Move `domainsCursor` to the current row.
-                domainNameCursor.moveToPosition(i);
+                    // Make it so.
+                    startActivity(dialIntent);
 
-                // Store the domain name in `domainSettingsSet`.
-                domainSettingsSet.add(domainNameCursor.getString(domainNameColumnIndex));
-            }
+                    // 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);
 
-            // Close `domainNameCursor.
-            domainNameCursor.close();
+                    // Add the URL to the intent.
+                    genericIntent.setData(Uri.parse(url));
 
-            // Initialize variables to track if domain settings will be applied and, if so, under which name.
-            domainSettingsApplied = false;
-            String domainNameInDatabase = null;
+                    // List all apps that can handle the URL instead of just opening the first one.
+                    genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
 
-            // Check the hostname.
-            if (domainSettingsSet.contains(hostName)) {
-                domainSettingsApplied = true;
-                domainNameInDatabase = hostName;
-            }
+                    // Open the app in a new task instead of as part of Privacy Browser.
+                    genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            // Check all the subdomains of the host name against wildcard domains in the domain cursor.
-            while (!domainSettingsApplied && hostName.contains(".")) {  // Stop checking if domain settings are already applied or there are no more `.` in the host name.
-                if (domainSettingsSet.contains("*." + hostName)) {  // Check the host name prepended by `*.`.
-                    // Apply the domain settings.
-                    domainSettingsApplied = true;
+                    // 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();
+                    }
 
-                    // Store the applied domain names as it appears in the database.
-                    domainNameInDatabase = "*." + hostName;
+                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
+                    return true;
                 }
-
-                // Strip out the lowest subdomain of of the host name.
-                hostName = hostName.substring(hostName.indexOf(".") + 1);
             }
 
+            // Check requests against the block lists.  The deprecated `shouldInterceptRequest()` must be used until minimum API >= 21.
+            @Override
+            public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
+                // Get a handle for the navigation view.
+                NavigationView navigationView = findViewById(R.id.navigationview);
 
-            // Get a handle for the shared preference.
-            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
-
-            // 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));
-            defaultCustomUserAgentString = sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value));
-            boolean defaultSwipeToRefresh = sharedPreferences.getBoolean("swipe_to_refresh", true);
-            nightMode = sharedPreferences.getBoolean("night_mode", false);
-            boolean displayWebpageImages = sharedPreferences.getBoolean("display_webpage_images", true);
+                // Get a handle for the navigation menu.
+                Menu navigationMenu = navigationView.getMenu();
 
-            if (domainSettingsApplied) {  // The url 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 a handle for the navigation requests menu item.  The menu is 0 based.
+                MenuItem navigationRequestsMenuItem = navigationMenu.getItem(6);
 
-                // 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);
-                // Form data can be removed once the minimum API >= 26.
-                saveFormDataEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)) == 1);
-                easyListEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYLIST)) == 1);
-                easyPrivacyEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYPRIVACY)) == 1);
-                fanboysAnnoyanceListEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_ANNOYANCE_LIST)) == 1);
-                fanboysSocialBlockingListEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_SOCIAL_BLOCKING_LIST)) == 1);
-                ultraPrivacyEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_ULTRAPRIVACY)) == 1);
-                blockAllThirdPartyRequests = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.BLOCK_ALL_THIRD_PARTY_REQUESTS)) == 1);
-                String userAgentName = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.USER_AGENT));
-                int fontSize = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE));
-                int swipeToRefreshInt = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SWIPE_TO_REFRESH));
-                int nightModeInt = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.NIGHT_MODE));
-                int displayWebpageImagesInt = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES));
-                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;
+                // 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()));
 
-                    case DomainsDatabaseHelper.NIGHT_MODE_DISABLED:
-                        nightMode = false;
-                        break;
-                }
+                // Reset the whitelist results tracker.
+                String[] whitelistResultStringArray = null;
 
-                // Store the domain JavaScript status.  This is used by the options menu night mode toggle.
-                domainSettingsJavaScriptEnabled = javaScriptEnabled;
+                // Initialize the third party request tracker.
+                boolean isThirdPartyRequest = false;
 
-                // Enable JavaScript if night mode is enabled.
-                if (nightMode) {
-                    javaScriptEnabled = true;
-                }
+                // Get the current URL.  `.getUrl()` throws an error because operations on the WebView cannot be made from this thread.
+                String currentBaseDomain = nestedScrollWebView.getCurrentDomainName();
 
-                // 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)));
-                }
+                // Store a copy of the current domain for use in later requests.
+                String currentDomain = currentBaseDomain;
 
-                // 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)));
-                }
+                // Nobody is happy when comparing null strings.
+                if ((currentBaseDomain != null) && (url != null)) {
+                    // Convert the request URL to a URI.
+                    Uri requestUri = Uri.parse(url);
 
-                // Close `currentHostDomainSettingsCursor`.
-                currentHostDomainSettingsCursor.close();
+                    // Get the request host name.
+                    String requestBaseDomain = requestUri.getHost();
 
-                // Apply the domain settings.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
+                    // 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);
+                        }
 
-                // Apply the form data setting if the API < 26.
-                if (Build.VERSION.SDK_INT < 26) {
-                    mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
-                }
+                        // 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);
+                        }
 
-                // 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);
+                        // Update the third party request tracker.
+                        isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
+                    }
                 }
 
-                // Set third-party cookies status if API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
-                }
+                // Get the current WebView page position.
+                int webViewPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-                // 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) {
-                    // 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);
+                // Determine if the WebView is currently displayed.
+                boolean webViewDisplayed = (webViewPagePosition == tabLayout.getSelectedTabPosition());
 
-                        // 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.
-                                mainWebView.getSettings().setUserAgentString(defaultUserAgentName);
-                                break;
+                // 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});
 
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                mainWebView.getSettings().setUserAgentString("");
-                                break;
+                    // Increment the blocked requests counters.
+                    nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                    nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS);
 
-                            case SETTINGS_CUSTOM_USER_AGENT:
-                                // Set the custom user agent.
-                                mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
-                                break;
+                    // 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) {
+                                optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                optionsMenu.findItem(R.id.block_all_third_party_requests).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " +
+                                        getString(R.string.block_all_third_party_requests));
+                            }
+                        });
+                    }
 
-                            default:
-                                // Get the user agent string from the user agent data array
-                                mainWebView.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);
+                    // Return an empty web resource response.
+                    return emptyWebResourceResponse;
+                }
 
-                        switch (userAgentArrayPosition) {
-                            case UNRECOGNIZED_USER_AGENT:  // The user agent name contains a custom user agent.
-                                mainWebView.getSettings().setUserAgentString(userAgentName);
-                                break;
+                // Check UltraPrivacy if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY)) {
+                    // Check the URL against UltraPrivacy.
+                    String[] ultraPrivacyResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, ultraPrivacy);
 
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                mainWebView.getSettings().setUserAgentString("");
-                                break;
+                    // 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]});
 
-                            default:
-                                // Get the user agent string from the user agent data array.
-                                mainWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.ULTRA_PRIVACY);
+
+                        // 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) {
+                                    optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsMenu.findItem(R.id.ultraprivacy).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.ULTRA_PRIVACY) + " - " + getString(R.string.ultraprivacy));
+                                }
+                            });
                         }
-                    }
-
-                    // Store the applied user agent string, which is used in the View Source activity.
-                    appliedUserAgentString = mainWebView.getSettings().getUserAgentString();
-
-                    // Update the user agent change tracker.
-                    userAgentChanged = !appliedUserAgentString.equals(initialUserAgent);
-                }
 
-                // Set swipe to refresh.
-                switch (swipeToRefreshInt) {
-                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_SYSTEM_DEFAULT:
-                        // Set swipe to refresh according to the default.
-                        swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
-                        break;
-
-                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_ENABLED:
-                        // Enable swipe to refresh.
-                        swipeRefreshLayout.setEnabled(true);
-                        break;
+                        // 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]});
 
-                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_DISABLED:
-                        // Disable swipe to refresh.
-                        swipeRefreshLayout.setEnabled(false);
+                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
+                        return null;
+                    }
                 }
 
-                // Set the loading of webpage images.
-                switch (displayWebpageImagesInt) {
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
-                        break;
+                // Check EasyList if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST)) {
+                    // Check the URL against EasyList.
+                    String[] easyListResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyList);
 
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(true);
-                        break;
+                    // 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]});
 
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(false);
-                        break;
-                }
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.EASY_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) {
+                                    optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsMenu.findItem(R.id.easylist).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASY_LIST) + " - " + getString(R.string.easylist));
+                                }
+                            });
+                        }
 
-                // 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 new URL does not have custom domain settings.  Load the defaults.
-                // Store the values from `sharedPreferences` in variables.
-                javaScriptEnabled = sharedPreferences.getBoolean("javascript", false);
-                firstPartyCookiesEnabled = sharedPreferences.getBoolean("first_party_cookies", false);
-                thirdPartyCookiesEnabled = sharedPreferences.getBoolean("third_party_cookies", false);
-                domStorageEnabled = sharedPreferences.getBoolean("dom_storage", false);
-                saveFormDataEnabled = sharedPreferences.getBoolean("save_form_data", false);  // Form data can be removed once the minimum API >= 26.
-                easyListEnabled = sharedPreferences.getBoolean("easylist", true);
-                easyPrivacyEnabled = sharedPreferences.getBoolean("easyprivacy", true);
-                fanboysAnnoyanceListEnabled = sharedPreferences.getBoolean("fanboys_annoyance_list", true);
-                fanboysSocialBlockingListEnabled = sharedPreferences.getBoolean("fanboys_social_blocking_list", true);
-                ultraPrivacyEnabled = sharedPreferences.getBoolean("ultraprivacy", true);
-                blockAllThirdPartyRequests = sharedPreferences.getBoolean("block_all_third_party_requests", false);
-
-                // Set `javaScriptEnabled` to be `true` if `night_mode` is `true`.
-                if (nightMode) {
-                    javaScriptEnabled = true;
+                        // 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]};
+                    }
                 }
 
-                // Apply the default settings.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
-                mainWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
-                swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
+                // Check EasyPrivacy if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY)) {
+                    // Check the URL against EasyPrivacy.
+                    String[] easyPrivacyResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyPrivacy);
 
-                // Apply the form data setting if the API < 26.
-                if (Build.VERSION.SDK_INT < 26) {
-                    mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
-                }
+                    // 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]});
 
-                // Reset the pinned SSL certificate information.
-                domainSettingsDatabaseId = -1;
-                pinnedDomainSslCertificate = false;
-                pinnedDomainSslIssuedToCNameString = "";
-                pinnedDomainSslIssuedToONameString = "";
-                pinnedDomainSslIssuedToUNameString = "";
-                pinnedDomainSslIssuedByCNameString = "";
-                pinnedDomainSslIssuedByONameString = "";
-                pinnedDomainSslIssuedByUNameString = "";
-                pinnedDomainSslStartDate = null;
-                pinnedDomainSslEndDate = null;
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.EASY_PRIVACY);
+
+                        // 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) {
+                                    optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsMenu.findItem(R.id.easyprivacy).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASY_PRIVACY) + " - " + getString(R.string.easyprivacy));
+                                }
+                            });
+                        }
 
-                // Set third-party cookies status if API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
+                        // 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]};
+                    }
                 }
 
-                // 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) {
-                    // Get the array position of the user agent name.
-                    int userAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
-
-                    // 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.
-                            mainWebView.getSettings().setUserAgentString(defaultUserAgentName);
-                            break;
+                // 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);
 
-                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                            // Set the user agent to `""`, which uses the default value.
-                            mainWebView.getSettings().setUserAgentString("");
-                            break;
+                    // 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]});
 
-                        case SETTINGS_CUSTOM_USER_AGENT:
-                            // Set the custom user agent.
-                            mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
-                            break;
+                        // 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) {
+                                    optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsMenu.findItem(R.id.fanboys_annoyance_list).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " +
+                                            getString(R.string.fanboys_annoyance_list));
+                                }
+                            });
+                        }
 
-                        default:
-                            // Get the user agent string from the user agent data array
-                            mainWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                        // 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]});
 
-                    // Store the applied user agent string, which is used in the View Source activity.
-                    appliedUserAgentString = mainWebView.getSettings().getUserAgentString();
+                        // 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) {
+                                    optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsMenu.findItem(R.id.fanboys_social_blocking_list).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " +
+                                            getString(R.string.fanboys_social_blocking_list));
+                                }
+                            });
+                        }
 
-                    // Update the user agent change tracker.
-                    userAgentChanged = !appliedUserAgentString.equals(initialUserAgent);
+                        // 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]};
+                    }
                 }
 
-                // Set the loading of webpage images.
-                mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
+                // 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});
+                }
 
-                // 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));
+                // The resource request has not been blocked.  `return null` loads the requested resource.
+                return null;
             }
 
-            // Close the domains database helper.
-            domainsDatabaseHelper.close();
+            // Handle HTTP authentication requests.
+            @Override
+            public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
+                // Store the handler.
+                nestedScrollWebView.setHttpAuthHandler(handler);
 
-            // Update the privacy icons, but only if `mainMenu` has already been populated.
-            if (mainMenu != null) {
-                updatePrivacyIcons(true);
+                // 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));
             }
-        }
 
-        // Reload the website if returning from the Domains activity.
-        if (reloadWebsite) {
-            mainWebView.reload();
-        }
+            @Override
+            public void onPageStarted(WebView view, String url, Bitmap favicon) {
+                // Get the preferences.
+                boolean scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
+                boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-        // Return the user agent changed status.
-        return userAgentChanged;
-    }
+                // Get a handler for the app bar layout.
+                AppBarLayout appBarLayout = findViewById(R.id.appbar_layout);
 
-    private void applyProxyThroughOrbot(boolean reloadWebsite) {
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // Set the top padding of the swipe refresh layout according to the app bar scrolling preference.
+                if (scrollAppBar) {
+                    // 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);
 
-        // Get the search preferences.
-        String homepageString = sharedPreferences.getString("homepage", getString(R.string.homepage_default_value));
-        String torHomepageString = sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value));
-        String torSearchString = sharedPreferences.getString("tor_search", getString(R.string.tor_search_default_value));
-        String torSearchCustomUrlString = sharedPreferences.getString("tor_search_custom_url", getString(R.string.tor_search_custom_url_default_value));
-        String searchString = sharedPreferences.getString("search", getString(R.string.search_default_value));
-        String searchCustomUrlString = sharedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value));
+                    // 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.
+                    int appBarHeight = appBarLayout.getHeight();
 
-        // Set the homepage, search, and proxy options.
-        if (proxyThroughOrbot) {  // Set the Tor options.
-            // Set `torHomepageString` as `homepage`.
-            homepage = torHomepageString;
+                    // The swipe refresh layout must be manually moved below the app bar layout.
+                    swipeRefreshLayout.setPadding(0, appBarHeight, 0, 0);
 
-            // If formattedUrlString is null assign the homepage to it.
-            if (formattedUrlString == null) {
-                formattedUrlString = homepage;
-            }
+                    // 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);
+                }
 
-            // 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;
-            }
+                // Reset the list of resource requests.
+                nestedScrollWebView.clearResourceRequests();
 
-            // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
+                // Reset the requests counters.
+                nestedScrollWebView.resetRequestsCounters();
 
-            // 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));
-            }
+                // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
+                if (nestedScrollWebView.getNightMode()) {
+                    nestedScrollWebView.setVisibility(View.INVISIBLE);
+                } else {
+                    nestedScrollWebView.setVisibility(View.VISIBLE);
+                }
 
-            // Check to see if Orbot is ready.
-            if (!orbotStatus.equals("ON")) {  // Orbot is not ready.
-                // Set `waitingForOrbot`.
-                waitingForOrbot = true;
+                // Hide the keyboard.
+                inputMethodManager.hideSoftInputFromWindow(nestedScrollWebView.getWindowToken(), 0);
 
-                // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
-                mainWebView.getSettings().setUseWideViewPort(false);
+                // Check to see if Privacy Browser is waiting on Orbot.
+                if (!waitingForOrbot) {  // Process the URL.
+                    // Get the current page position.
+                    int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-                // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
-                mainWebView.loadData(waitingForOrbotHtmlString, "text/html", null);
-            } else if (reloadWebsite) {  // Orbot is ready and the website should be reloaded.
-                // Reload the website.
-                mainWebView.reload();
-            }
-        } else {  // Set the non-Tor options.
-            // Set `homepageString` as `homepage`.
-            homepage = homepageString;
+                    // Update the URL text bar if the page is currently selected.
+                    if (tabLayout.getSelectedTabPosition() == currentPagePosition) {
+                        // Display the formatted URL text.
+                        urlEditText.setText(url);
 
-            // If formattedUrlString is null assign the homepage to it.
-            if (formattedUrlString == null) {
-                formattedUrlString = homepage;
-            }
+                        // Apply text highlighting to `urlTextBox`.
+                        highlightUrlText();
+                    }
 
-            // 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;
-            }
+                    // Reset the list of host IP addresses.
+                    nestedScrollWebView.clearCurrentIpAddresses();
 
-            // Reset the proxy to default.  The host is `""` and the port is `"0"`.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
+                    // Get a URI for the current URL.
+                    Uri currentUri = Uri.parse(url);
 
-            // 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));
-            }
+                    // Get the IP addresses for the host.
+                    new GetHostIpAddresses(activity, getSupportFragmentManager(), nestedScrollWebView).execute(currentUri.getHost());
 
-            // Reset `waitingForOrbot.
-            waitingForOrbot = false;
+                    // Apply any custom domain settings if the URL was loaded by navigating history.
+                    if (nestedScrollWebView.getNavigatingHistory()) {
+                        // Reset navigating history.
+                        nestedScrollWebView.setNavigatingHistory(false);
 
-            // Reload the website if requested.
-            if (reloadWebsite) {
-                mainWebView.reload();
-            }
-        }
-    }
+                        // Apply the domain settings.
+                        boolean userAgentChanged = applyDomainSettings(nestedScrollWebView, url, true, false);
 
-    private void updatePrivacyIcons(boolean runInvalidateOptionsMenu) {
-        // Get handles for the menu items.
-        MenuItem privacyMenuItem = mainMenu.findItem(R.id.toggle_javascript);
-        MenuItem firstPartyCookiesMenuItem = mainMenu.findItem(R.id.toggle_first_party_cookies);
-        MenuItem domStorageMenuItem = mainMenu.findItem(R.id.toggle_dom_storage);
-        MenuItem refreshMenuItem = mainMenu.findItem(R.id.refresh);
-
-        // Update the privacy icon.
-        if (javaScriptEnabled) {  // JavaScript is enabled.
-            privacyMenuItem.setIcon(R.drawable.javascript_enabled);
-        } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled but cookies are enabled.
-            privacyMenuItem.setIcon(R.drawable.warning);
-        } else {  // All the dangerous features are disabled.
-            privacyMenuItem.setIcon(R.drawable.privacy_mode);
-        }
+                        // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
+                        if (userAgentChanged) {
+                            loadUrl(url);
+                        }
+                    }
 
-        // Update the first-party cookies icon.
-        if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
-            firstPartyCookiesMenuItem.setIcon(R.drawable.cookies_enabled);
-        } else {  // First-party cookies are disabled.
-            if (darkTheme) {
-                firstPartyCookiesMenuItem.setIcon(R.drawable.cookies_disabled_dark);
-            } else {
-                firstPartyCookiesMenuItem.setIcon(R.drawable.cookies_disabled_light);
-            }
-        }
+                    // Replace Refresh with Stop if the options menu has been created.  (The WebView typically begins loading before the menu items are instantiated.)
+                    if (optionsMenu != null) {
+                        // Get a handle for the refresh menu item.
+                        MenuItem refreshMenuItem = optionsMenu.findItem(R.id.refresh);
 
-        // Update the DOM storage icon.
-        if (javaScriptEnabled && domStorageEnabled) {  // Both JavaScript and DOM storage are enabled.
-            domStorageMenuItem.setIcon(R.drawable.dom_storage_enabled);
-        } else if (javaScriptEnabled) {  // JavaScript is enabled but DOM storage is disabled.
-            if (darkTheme) {
-                domStorageMenuItem.setIcon(R.drawable.dom_storage_disabled_dark);
-            } else {
-                domStorageMenuItem.setIcon(R.drawable.dom_storage_disabled_light);
-            }
-        } else {  // JavaScript is disabled, so DOM storage is ghosted.
-            if (darkTheme) {
-                domStorageMenuItem.setIcon(R.drawable.dom_storage_ghosted_dark);
-            } else {
-                domStorageMenuItem.setIcon(R.drawable.dom_storage_ghosted_light);
-            }
-        }
+                        // Set the title.
+                        refreshMenuItem.setTitle(R.string.stop);
 
-        // Update the refresh icon.
-        if (darkTheme) {
-            refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
-        } else {
-            refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
-        }
+                        // Get the app bar and theme preferences.
+                        boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
 
-        // `invalidateOptionsMenu` calls `onPrepareOptionsMenu()` and redraws the icons in the `AppBar`.
-        if (runInvalidateOptionsMenu) {
-            invalidateOptionsMenu();
-        }
-    }
+                        // If the icon is displayed in the AppBar, set it according to the theme.
+                        if (displayAdditionalAppBarIcons) {
+                            if (darkTheme) {
+                                refreshMenuItem.setIcon(R.drawable.close_dark);
+                            } else {
+                                refreshMenuItem.setIcon(R.drawable.close_light);
+                            }
+                        }
+                    }
+                }
+            }
 
-    private void openUrlWithExternalApp(String url) {
-        // Create a download intent.  Not specifying the action type will display the maximum number of options.
-        Intent downloadIntent = new Intent();
+            @Override
+            public void onPageFinished(WebView view, String url) {
+                // Reset the wide view port if it has been turned off by the waiting for Orbot message.
+                if (!waitingForOrbot) {
+                    // Only use a wide view port if the URL starts with `http`, not for `file://` and `content://`.
+                    nestedScrollWebView.getSettings().setUseWideViewPort(url.startsWith("http"));
+                }
 
-        // Set the URI and the mime type.  `"*/*"` will display the maximum number of options.
-        downloadIntent.setDataAndType(Uri.parse(url), "text/html");
+                // 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();
+                }
 
-        // Flag the intent to open in a new task.
-        downloadIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                // Update the Refresh menu item if the options menu has been created.
+                if (optionsMenu != null) {
+                    // Get a handle for the refresh menu item.
+                    MenuItem refreshMenuItem = optionsMenu.findItem(R.id.refresh);
 
-        // Show the chooser.
-        startActivity(Intent.createChooser(downloadIntent, getString(R.string.open_with)));
-    }
+                    // Reset the Refresh title.
+                    refreshMenuItem.setTitle(R.string.refresh);
 
-    private void highlightUrlText() {
-        // Get the URL string.
-        String urlString = urlTextBox.getText().toString();
-
-        // 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;
-        }
+                    // Get the app bar and theme preferences.
+                    boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
+                    boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-        // Get the index of the last `.` in the domain.
-        int lastDotIndex = baseUrl.lastIndexOf(".");
+                    // If the icon is displayed in the AppBar, reset it according to the theme.
+                    if (displayAdditionalAppBarIcons) {
+                        if (darkTheme) {
+                            refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
+                        } else {
+                            refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
+                        }
+                    }
+                }
 
-        // Get the index of the penultimate `.` in the domain.
-        int penultimateDotIndex = baseUrl.lastIndexOf(".", lastDotIndex - 1);
+                // Clear the cache and history if Incognito Mode is enabled.
+                if (incognitoModeEnabled) {
+                    // Clear the cache.  `true` includes disk files.
+                    nestedScrollWebView.clearCache(true);
 
-        // Markup the beginning of the URL.
-        if (urlString.startsWith("http://")) {  // Highlight the protocol of connections that are not encrypted.
-            urlTextBox.getText().setSpan(redColorSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+                    // Clear the back/forward history.
+                    nestedScrollWebView.clearHistory();
 
-            // De-emphasize subdomains.
-            if (penultimateDotIndex > 0)  {  // There is more than one subdomain in the domain name.
-                urlTextBox.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.
-                urlTextBox.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.
-                urlTextBox.getText().setSpan(initialGrayColorSpan, 0, 8, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
-            }
-        }
+                    // 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;
 
-        // De-emphasize the text after the domain name.
-        if (endOfDomainName > 0) {
-            urlTextBox.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
-        }
-    }
+                        // Delete the main cache directory.
+                        Runtime.getRuntime().exec("rm -rf " + privateDataDirectoryString + "/cache");
 
-    private void loadBookmarksFolder() {
-        // Update the bookmarks cursor with the contents of the bookmarks database for the current folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+                        // 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 e) {
+                        // Do nothing if an error is thrown.
+                    }
+                }
 
-        // 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);
+                // Update the URL text box and apply domain settings if not waiting on Orbot.
+                if (!waitingForOrbot) {
+                    // Get the current page position.
+                    int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
+
+                    // Update the URL text bar if the page is currently selected.
+                    if (tabLayout.getSelectedTabPosition() == currentPagePosition) {
+                        // Check to see if the URL is `about:blank`.
+                        if (url.equals("about:blank")) {  // The WebView is blank.
+                            // Display the hint in the URL edit text.
+                            urlEditText.setText("");
+
+                            // Request focus for the URL text box.
+                            urlEditText.requestFocus();
+
+                            // Display the keyboard.
+                            inputMethodManager.showSoftInput(urlEditText, 0);
+
+                            // Hide the WebView, which causes the default background color to be displayed according to the theme.
+                            nestedScrollWebView.setVisibility(View.INVISIBLE);
+
+                            // Apply the domain settings.  This clears any settings from the previous domain.
+                            applyDomainSettings(nestedScrollWebView, "", true, false);
+                        } else {  // The WebView has loaded a webpage.
+                            // Only update the URL text box if the user is not typing in it.
+                            if (!urlEditText.hasFocus()) {
+                                // 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(nestedScrollWebView.getUrl());
+
+                                // Apply text highlighting to the URL.
+                                highlightUrlText();
+                            }
+                        }
+                    }
+
+                    // Check the current website information against any pinned domain information if the current IP addresses have been loaded.
+                    if ((nestedScrollWebView.hasPinnedSslCertificate() || nestedScrollWebView.hasPinnedIpAddresses()) && nestedScrollWebView.hasCurrentIpAddresses() &&
+                            !nestedScrollWebView.ignorePinnedDomainInformation()) {
+                        CheckPinnedMismatchHelper.checkPinnedMismatch(getSupportFragmentManager(), nestedScrollWebView);
+                    }
+                }
             }
 
+            // Handle SSL Certificate errors.
             @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);
-
-                // Get the favorite icon byte array from the cursor.
-                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
+            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
+                // Get the current website SSL certificate.
+                SslCertificate currentWebsiteSslCertificate = error.getCertificate();
 
-                // 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);
+                // 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();
 
-                // Display the bitmap in `bookmarkFavoriteIcon`.
-                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
+                // 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);
 
-                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
-                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
-                bookmarkNameTextView.setText(bookmarkNameString);
+                    // Instantiate an SSL certificate error alert dialog.
+                    DialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error, nestedScrollWebView.getWebViewFragmentId());
 
-                // 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);
+                    // Show the SSL certificate error dialog.
+                    sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
                 }
             }
-        };
+        });
 
-        // Populate the `ListView` with the adapter.
-        bookmarksListView.setAdapter(bookmarksCursorAdapter);
+        // Check to see if this is the first page.
+        if (pageNumber == 0) {
+            // Set this nested scroll WebView as the current WebView.
+            currentWebView = nestedScrollWebView;
 
-        // Set the bookmarks drawer title.
-        if (currentBookmarksFolder.isEmpty()) {
-            bookmarksTitleTextView.setText(R.string.bookmarks);
-        } else {
-            bookmarksTitleTextView.setText(currentBookmarksFolder);
+            // Apply the app settings from the shared preferences.
+            applyAppSettings();
+
+            // Load the website if not waiting for Orbot to connect.
+            if (!waitingForOrbot) {
+                // Get the intent that started the app.
+                Intent launchingIntent = getIntent();
+
+                // Get the information from the intent.
+                String launchingIntentAction = launchingIntent.getAction();
+                Uri launchingIntentUriData = launchingIntent.getData();
+
+                // If the intent action is a web search, perform the search.
+                if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {
+                    // 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 = "";
+                    }
+
+                    // Load the completed search URL.
+                    loadUrl(searchURL + encodedUrlString);
+                } else if (launchingIntentUriData != null){  // Check to see if the intent contains a new URL.
+                    // Load the URL from the intent.
+                    loadUrl(launchingIntentUriData.toString());
+                } else {  // The is no URL in the intent.
+                    // Select the homepage based on the proxy through Orbot status.
+                    if (proxyThroughOrbot) {
+                        // Load the Tor homepage.
+                        loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
+                    } else {
+                        // Load the normal homepage.
+                        loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
+                    }
+                }
+            }
         }
     }
 }
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