]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/activities/MainWebViewActivity.java
Make the favorite icon tab aware.
[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
index a2f72e591de2d304ce47ba4cd810ce2e70402494..c0f2b824ffd31f99de096b907f9cc3ea75941e12 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;
@@ -37,7 +36,6 @@ import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
-import android.content.res.Resources;
 import android.database.Cursor;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
@@ -54,25 +52,6 @@ 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;
@@ -95,6 +74,7 @@ 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 +91,51 @@ 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.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.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.PinnedMismatchDialog;
+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;
@@ -150,12 +154,13 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
+// TODO.  The swipe refresh indicator needs to be enabled/disabled when switching tabs.
+
 // 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 {
+        DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener, DownloadLocationPermissionDialog.DownloadLocationPermissionDialogListener, EditBookmarkDialog.EditBookmarkListener,
+        EditBookmarkFolderDialog.EditBookmarkFolderListener, HttpAuthenticationDialog.HttpAuthenticationListener, NavigationView.OnNavigationItemSelectedListener, WebViewTabFragment.NewTabListener,
+        PinnedMismatchDialog.PinnedMismatchListener, SslCertificateErrorDialog.SslCertificateErrorListener, UrlHistoryDialog.UrlHistoryListener {
 
     // `darkTheme` is public static so it can be accessed from everywhere.
     public static boolean darkTheme;
@@ -163,27 +168,16 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `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`.
+    // TODO Remove.
+    // `formattedUrlString` is public static so it can be accessed from `AddDomainDialog`, `BookmarksActivity`, `DomainSettingsFragment`, and `PinnedMismatchDialog`.
     // 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;
-
     // `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;
+    // The WebView pager adapter is accessed from `PinnedMismatchDialog`.  It is also used in `onCreate()`, `onResume()`, and `addTab()`.
+    public static WebViewPagerAdapter webViewPagerAdapter;
 
     // `reloadOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`
     public static boolean reloadOnRestart;
@@ -194,81 +188,17 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `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()`.
+    // The blocklist 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;
@@ -278,74 +208,52 @@ 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;
+    private boolean navigatingHistory;  // TODO.
 
-    // `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;
 
+    // TODO Move to NestedScrollWebView.
     // `nightMode` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and  `applyDomainSettings()`.
     private boolean nightMode;
 
     // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyProxyThroughOrbot()`.
-    private String homepage;
+    private String homepage;  // TODO ?
 
     // `searchURL` is used in `loadURLFromTextBox()` and `applyProxyThroughOrbot()`.
-    private String searchURL;
+    private String searchURL;  // TODO ?
+
+    // The options menu is set in `onCreateOptionsMenu()` and used in `onOptionsItemSelected()` and `updatePrivacyIcons()`.
+    private Menu optionsMenu;
 
-    // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
-    private Menu mainMenu;
+    // The refresh menu item is set in `onCreateOptionsMenu()` and accessed from `initializeWebView()`.
+    // It must be this way because `initializeWebView()` runs before the menu is created but doesn't actually modify the menu until later.
+    private MenuItem refreshMenuItem;  // TODO.  Create it from `optionsMenu`.
 
-    // `refreshMenuItem` is used in `onCreate()` and `onCreateOptionsMenu()`.
-    private MenuItem refreshMenuItem;
+    // TODO.  This could probably be removed.
+    // The blocklist helper is used in `onCreate()` and `WebViewPagerAdapter`.
+    private BlockListHelper blockListHelper;
 
-    // The blocklist menu items are used in `onCreate()`, `onCreateOptionsMenu()`, and `onPrepareOptionsMenu()`.
+    // The blocklists are populated in `onCreate()` and accessed from `WebViewPagerAdapter`.
+    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;
+
+    // The blocklist menu items are used in `onCreateOptionsMenu()`, `onPrepareOptionsMenu()`, and `initializeWebView()`.  // TODO.
     private MenuItem blocklistsMenuItem;
     private MenuItem easyListMenuItem;
     private MenuItem easyPrivacyMenuItem;
@@ -354,39 +262,23 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     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;
-
     // `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()`.
-    private boolean incognitoModeEnabled;
+    private boolean incognitoModeEnabled;  // TODO.
 
     // `fullScreenBrowsingModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
-    private boolean fullScreenBrowsingModeEnabled;
+    private boolean fullScreenBrowsingModeEnabled;  // TODO.
 
     // `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;
+    // Hide app bar is used in `onCreate()` and `applyAppSettings()`.
+    private boolean hideAppBar;  // TODO.
 
     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
     private boolean reapplyDomainSettingsOnRestart;
@@ -398,13 +290,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     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;
+    private boolean downloadWithExternalApp;  // TODO.
 
     // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
     private BroadcastReceiver orbotStatusBroadcastReceiver;
@@ -412,68 +298,52 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `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;
+    private Boolean domainSettingsJavaScriptEnabled;  // TODO.
 
     // `waitingForOrbotHtmlString` is used in `onCreate()` and `applyProxyThroughOrbot()`.
-    private String waitingForOrbotHtmlString;
+    private String waitingForOrbotHtmlString;  // TODO.
 
     // `privateDataDirectoryString` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`.
-    private String privateDataDirectoryString;
-
-    // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private LinearLayout findOnPageLinearLayout;
+    private String privateDataDirectoryString;  // TODO.
 
     // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private EditText findOnPageEditText;
+    private EditText findOnPageEditText;  // TODO.
 
     // `displayAdditionalAppBarIcons` is used in `onCreate()` and `onCreateOptionsMenu()`.
-    private boolean displayAdditionalAppBarIcons;
-
-    // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
-    private ActionBarDrawerToggle drawerToggle;
+    private boolean displayAdditionalAppBarIcons;  // TODO.
 
-    // `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;  // TODO.
 
     // The color spans are used in `onCreate()` and `highlightUrlText()`.
     private ForegroundColorSpan redColorSpan;
     private ForegroundColorSpan initialGrayColorSpan;
     private ForegroundColorSpan finalGrayColorSpan;
 
+    // The drawer header padding variables are used in `onCreate()` and `onConfigurationChanged()`.
+    private int drawerHeaderPaddingLeftAndRight;
+    private int drawerHeaderPaddingTop;
+    private int drawerHeaderPaddingBottom;
+
     // `sslErrorHandler` is used in `onCreate()`, `onSslErrorCancel()`, and `onSslErrorProceed`.
-    private SslErrorHandler sslErrorHandler;
+    private SslErrorHandler sslErrorHandler;  // TODO.
 
     // `httpAuthHandler` is used in `onCreate()`, `onHttpAuthenticationCancel()`, and `onHttpAuthenticationProceed()`.
-    private static HttpAuthHandler httpAuthHandler;
+    private static HttpAuthHandler httpAuthHandler;  // TODO.
 
     // `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;
+    private InputMethodManager inputMethodManager;  // TODO.
 
     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
     // and `loadBookmarksFolder()`.
-    private BookmarksDatabaseHelper bookmarksDatabaseHelper;
+    private BookmarksDatabaseHelper bookmarksDatabaseHelper;  // TODO.
 
     // `bookmarksListView` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, and `loadBookmarksFolder()`.
-    private ListView bookmarksListView;
+    private ListView bookmarksListView;  // TODO.
 
     // `bookmarksTitleTextView` is used in `onCreate()` and `loadBookmarksFolder()`.
-    private TextView bookmarksTitleTextView;
+    private TextView bookmarksTitleTextView;  // TODO.
 
     // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
     private Cursor bookmarksCursor;
@@ -487,7 +357,7 @@ 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 download strings are used in `onCreate()`, `onRequestPermissionResult()` and `initializeWebView()`.
     private String downloadUrl;
     private String downloadContentDisposition;
     private long downloadContentLength;
@@ -499,16 +369,13 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     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.  The deprecated `getColor()` must be used 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);
@@ -533,44 +400,41 @@ 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 resources.
-        Resources resources = getResources();
-
-        // Get a handle for `inputMethodManager`.
+        // Get handles for the input method manager and toolbar.
         inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+        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);
+        ActionBar actionBar = getSupportActionBar();
 
-        // This is needed to get rid of the Android Studio warning that `appBar` might be null.
-        assert appBar != null;
+        // This is needed to get rid of the Android Studio warning that the action bar might be null.
+        assert actionBar != null;
 
-        // Add the custom `url_app_bar` layout, which shows the favorite icon and the URL text bar.
-        appBar.setCustomView(R.layout.url_app_bar);
-        appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
+        // Add 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(resources.getColor(R.color.red_a700));
-        initialGrayColorSpan = new ForegroundColorSpan(resources.getColor(R.color.gray_500));
-        finalGrayColorSpan = new ForegroundColorSpan(resources.getColor(R.color.gray_500));
+        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();
@@ -578,7 +442,7 @@ 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.
@@ -595,8 +459,7 @@ 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;
 
@@ -621,167 +484,172 @@ 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);
+        // Instantiate the block list helper.
+        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");
+
+        // 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 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);
         bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
         bookmarksTitleTextView = findViewById(R.id.bookmarks_title_textview);
         FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
-        mainWebViewRelativeLayout = findViewById(R.id.main_webview_relativelayout);
-        mainWebView = findViewById(R.id.main_webview);
-        findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
         findOnPageEditText = findViewById(R.id.find_on_page_edittext);
-        fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
-        urlAppBarRelativeLayout = findViewById(R.id.url_app_bar_relativelayout);
-        favoriteIconImageView = findViewById(R.id.favorite_icon);
-
-        // Set the bookmarks drawer resources according to the theme.  This can't be done in the layout due to compatibility issues with the `DrawerLayout` support widget.
-        if (darkTheme) {
-            launchBookmarksActivityFab.setImageDrawable(resources.getDrawable(R.drawable.bookmarks_dark));
-            createBookmarkFolderFab.setImageDrawable(resources.getDrawable(R.drawable.create_folder_dark));
-            createBookmarkFab.setImageDrawable(resources.getDrawable(R.drawable.create_bookmark_dark));
-            bookmarksListView.setBackgroundColor(resources.getColor(R.color.gray_850));
-        } else {
-            launchBookmarksActivityFab.setImageDrawable(resources.getDrawable(R.drawable.bookmarks_light));
-            createBookmarkFolderFab.setImageDrawable(resources.getDrawable(R.drawable.create_folder_light));
-            createBookmarkFab.setImageDrawable(resources.getDrawable(R.drawable.create_bookmark_light));
-            bookmarksListView.setBackgroundColor(resources.getColor(R.color.white));
-        }
 
-        // Set the launch bookmarks activity FAB to launch the bookmarks activity.
-        launchBookmarksActivityFab.setOnClickListener(v -> {
-            // Create an intent to launch the bookmarks activity.
-            Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
+        // Listen for touches on the navigation menu.
+        navigationView.setNavigationItemSelectedListener(this);
 
-            // Include the current folder with the `Intent`.
-            bookmarksIntent.putExtra("Current Folder", currentBookmarksFolder);
+        // 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);
 
-            // Make it so.
-            startActivity(bookmarksIntent);
-        });
+        // Initialize the web view pager adapter.
+        webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
 
-        // 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(), resources.getString(R.string.create_folder));
-        });
+        // Set the pager adapter on the web view pager.
+        webViewPager.setAdapter(webViewPagerAdapter);
 
-        // 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(), resources.getString(R.string.create_bookmark));
-        });
+        // Store up to 100 tabs in memory.
+        webViewPager.setOffscreenPageLimit(100);
 
-        // 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.
+        // Update the web view pager every time a tab is modified.
+        webViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
             @Override
-            public boolean onDoubleTap(MotionEvent event) {
-                if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
-                    // Toggle `inFullScreenBrowsingMode`.
-                    inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
+            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+                // Do nothing.
+            }
 
-                    if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
-                        // Hide the `appBar`.
-                        appBar.hide();
+            @Override
+            public void onPageSelected(int position) {
+                // Set the current WebView.
+                setCurrentWebView(position);
 
-                        // 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));
-                        }
+                // 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.
+                if (tabLayout.getSelectedTabPosition() != position) {
+                    // Get a handle for the corresponding tab.
+                    TabLayout.Tab correspondingTab = tabLayout.getTabAt(position);
 
-                        // 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();
+                    // Assert that the corresponding tab is not null.
+                    assert correspondingTab != null;
 
-                        // 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));
-                        }
+                    // Select the corresponding tab.
+                    correspondingTab.select();
+                }
+            }
 
-                        // Remove the translucent navigation bar flag if it is set.
-                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+            @Override
+            public void onPageScrollStateChanged(int state) {
+                // Do nothing.
+            }
+        });
 
-                        // 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);
+        // 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());
+            }
 
-                        // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                        rootCoordinatorLayout.setSystemUiVisibility(0);
+            @Override
+            public void onTabUnselected(TabLayout.Tab tab) {
+                // Do nothing.
+            }
 
-                        // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-                        rootCoordinatorLayout.setFitsSystemWindows(true);
-                    }
+            @Override
+            public void onTabReselected(TabLayout.Tab tab) {
+                // Instantiate the View SSL Certificate dialog.
+                DialogFragment viewSslCertificateDialogFragment = ViewSslCertificateDialog.displayDialog(currentWebView.getWebViewFragmentId(), currentWebView.getFavoriteOrDefaultIcon());
 
-                    // Consume the double-tap.
-                    return true;
-                } else { // Do not consume the double-tap because full screen browsing mode is disabled.
-                    return false;
-                }
+                // Display the View SSL Certificate dialog.
+                viewSslCertificateDialogFragment.show(getSupportFragmentManager(), getString(R.string.view_ssl_certificate));
             }
         });
 
-        // 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();
+        // 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));
+            createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_dark));
+            bookmarksListView.setBackgroundColor(getResources().getColor(R.color.gray_850));
+        } else {
+            launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_light));
+            createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_light));
+            createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_light));
+            bookmarksListView.setBackgroundColor(getResources().getColor(R.color.white));
+        }
+
+        // Set the launch bookmarks activity FAB to launch the bookmarks activity.
+        launchBookmarksActivityFab.setOnClickListener(v -> {
+            // Store the current WebView url and title in the bookmarks activity.  // TODO.
+            BookmarksActivity.currentWebViewUrl = currentWebView.getUrl();
+            BookmarksActivity.currentWebViewTitle = currentWebView.getTitle();
+
+            // Get a copy of the favorite icon bitmap.
+            Bitmap favoriteIconBitmap = currentWebView.getFavoriteOrDefaultIcon();
+
+            // Create a favorite icon byte array output stream.
+            ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-            // Send the `event` to `gestureDetector`.
-            return gestureDetector.onTouchEvent(event);
+            // 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);
+
+            // Add the extra information to the intent.
+            bookmarksIntent.putExtra("current_folder", currentBookmarksFolder);
+            bookmarksIntent.putExtra("favorite_icon_byte_array", favoriteIconByteArray);
+
+            // Make it so.
+            startActivity(bookmarksIntent);
         });
 
-        // Update `findOnPageCountTextView`.
-        mainWebView.setFindListener(new WebView.FindListener() {
-            // Get a handle for `findOnPageCountTextView`.
-            final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
+        // Set the create new bookmark folder FAB to display an alert dialog.
+        createBookmarkFolderFab.setOnClickListener(v -> {
+            // Create a create bookmark folder dialog.
+            DialogFragment createBookmarkFolderDialog = CreateBookmarkFolderDialog.createBookmarkFolder(currentWebView.getFavoriteOrDefaultIcon());
 
-            @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;
+            // Show the create bookmark folder dialog.
+            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
+        });
 
-                    // Build the match string.
-                    String matchString = activeMatch + "/" + numberOfMatches;
+        // Set the create new bookmark FAB to display an alert dialog.
+        createBookmarkFab.setOnClickListener(view -> {
+            // Instantiate the create bookmark dialog.
+            DialogFragment createBookmarkDialog = CreateBookmarkDialog.createBookmark(currentWebView.getUrl(), currentWebView.getTitle(), currentWebView.getFavoriteOrDefaultIcon());
 
-                    // 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`.
@@ -799,15 +667,15 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             @Override
             public void afterTextChanged(Editable s) {
                 // Search for the text in `mainWebView`.
-                mainWebView.findAllAsync(findOnPageEditText.getText().toString());
+                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;
@@ -818,34 +686,24 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         });
 
         // Implement swipe to refresh.
-        swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
-        swipeRefreshLayout.setOnRefreshListener(() -> mainWebView.reload());
+        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
+
+        // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
+        swipeRefreshLayout.setProgressViewOffset(false, swipeRefreshLayout.getProgressViewStartOffset() - 10, 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.
@@ -859,7 +717,7 @@ 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.
@@ -893,12 +751,12 @@ 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(), resources.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(), resources.getString(R.string.edit_bookmark));
+                DialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
+                editBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.edit_bookmark));
             }
 
             // Consume the event.
@@ -906,18 +764,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         });
 
         // Get the status bar pixel size.
-        int statusBarResourceId = resources.getIdentifier("status_bar_height", "dimen", "android");
-        int statusBarPixelSize = resources.getDimensionPixelSize(statusBarResourceId);
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
         // Get the resource density.
-        float screenDensity = resources.getDisplayMetrics().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.
-        int drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
-        int drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
-        int drawerHeaderPaddingBottom = (int) (8 * screenDensity);
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
 
-        // The drawer listener is used to update the navigation menu.
+        // The drawer listener is used to update the navigation menu.`
         drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
             @Override
             public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
@@ -938,3795 +796,4440 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     TextView navigationHeaderTextView = findViewById(R.id.navigationText);
                     TextView bookmarksHeaderTextView = findViewById(R.id.bookmarks_title_textview);
 
-                    // Apply the calculated drawer paddings.  This moves the text in the header below any cutouts.
-                    navigationHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
-                    bookmarksHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
+                    // 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 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);
+                    // 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);
-                                    }
-                                };
-
-                                // Displaying of `mainWebView` after 500 milliseconds.
-                                displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
-                            });
-                }
+        // 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);
 
-                // Update the progress bar.
-                progressBar.setProgress(progress);
+        // 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`.
 
-                // 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);
+        // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
+        inFullScreenBrowsingMode = false;
 
-                    // 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);
-                    }
+        // Initialize the privacy settings variables.
+        firstPartyCookiesEnabled = false;
+        saveFormDataEnabled = false;  // Form data can be removed once the minimum API >= 26.
+        nightMode = false;
 
-                    //Stop the swipe to refresh indicator if it is running
-                    swipeRefreshLayout.setRefreshing(false);
-                }
-            }
+        // 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);
 
-            // 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;
+        // Get a handle for the WebView.
+        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
 
-                    // Place the favorite icon in the appBar.
-                    favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
-                }
-            }
+        // Store the default user agent.
+        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
 
-            // 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;
-            }
+        // Destroy the bare WebView.
+        bareWebView.destroy();
 
-            // Enter full screen video.
-            @Override
-            public void onShowCustomView(View view, CustomViewCallback callback) {
-                // Set the full screen video flag.
-                displayingFullScreenVideo = true;
+        // 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);
 
-                // 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));
-                }
+        // Get the intent that started the app.
+        Intent launchingIntent = getIntent();
 
-                // Remove the translucent overlays.
-                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+        // Get the information from the intent.
+        String launchingIntentAction = launchingIntent.getAction();
+        Uri launchingIntentUriData = launchingIntent.getData();
 
-                // 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);
+        // 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;
 
-                /* 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);
+            // Sanitize the search input and convert it to a search.
+            try {
+                encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                encodedUrlString = "";
+            }
 
-                // Set `rootCoordinatorLayout` to fill the entire screen.
-                rootCoordinatorLayout.setFitsSystemWindows(false);
+            // 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();
+        }
+    }
 
-                // Disable the sliding drawers.
-                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
+    @Override
+    protected void onNewIntent(Intent intent) {
+        // Get the information from the intent.
+        String intentAction = intent.getAction();
+        Uri intentUriData = intent.getData();
 
-                // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
-                fullScreenVideoFrameLayout.addView(view);
-                fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
-            }
+        // 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);
 
-            // Exit full screen video.
-            @Override
-            public void onHideCustomView() {
-                // Unset the full screen video flag.
-                displayingFullScreenVideo = false;
+            // Add a new tab.
+            addTab(null);
 
-                // Hide `fullScreenVideoFrameLayout`.
-                fullScreenVideoFrameLayout.removeAllViews();
-                fullScreenVideoFrameLayout.setVisibility(View.GONE);
+            // 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;
 
-                // Enable the sliding drawers.
-                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
+                // Sanitize the search input and convert it to a search.
+                try {
+                    encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                } catch (UnsupportedEncodingException exception) {
+                    encodedUrlString = "";
+                }
 
-                // 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);
+                // Add the base search URL.
+                formattedUrlString = searchURL + encodedUrlString;
+            } else {  // The intent should contain a URL.
+                // Set the formatted URL string.
+                formattedUrlString = intentUriData.toString();
+            }
 
-                        // Remove the translucent status bar overlay.
-                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            // Load the URL.
+            loadUrl(formattedUrlString);
 
-                        // 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);
+            // Get a handle for the drawer layout.
+            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-                        /* 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);
+            // Close the navigation drawer if it is open.
+            if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
+                drawerLayout.closeDrawer(GravityCompat.START);
+            }
 
-                        // Add the translucent status flag if it is unset.
-                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            // Close the bookmarks drawer if it is open.
+            if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
+                drawerLayout.closeDrawer(GravityCompat.END);
+            }
 
-                        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();
-                    }
+            // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
+            currentWebView.requestFocus();
+        }
+    }
 
-                    // 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));
-                    }
+    @Override
+    public void onRestart() {
+        // Run the default commands.
+        super.onRestart();
 
-                    // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                    rootCoordinatorLayout.setSystemUiVisibility(0);
+        // 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 navigation bar flag if it is set.
-                    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+            // Send the intent to the Orbot package.
+            orbotIntent.setPackage("org.torproject.android");
 
-                    // 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);
+            // Make it so.
+            sendBroadcast(orbotIntent);
+        }
 
-                    // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-                    rootCoordinatorLayout.setFitsSystemWindows(true);
-                }
+        // Apply the app settings if returning from the Settings activity.
+        if (reapplyAppSettingsOnRestart) {
+            // Apply the app settings.
+            applyAppSettings();
 
-                // 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));
-                }
-            }
+            // Reload the webpage if displaying of images has been disabled in the Settings activity.
+            if (reloadOnRestart) {
+                // Reload the WebViews.
+                for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                    // Get the WebView tab fragment.
+                    WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            // 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;
+                    // Get the fragment view.
+                    View fragmentView = webViewTabFragment.getView();
 
-                    // Create an intent to open a chooser based ont the file chooser parameters.
-                    Intent fileChooserIntent = fileChooserParams.createIntent();
+                    // 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);
 
-                    // 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);
+                        // Reload the WebView.  This doesn't seem to work if for WebViews that aren't visible.
+                        nestedScrollWebView.reload();
+                    }
                 }
-                return true;
-            }
-        });
 
-        // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
-        registerForContextMenu(mainWebView);
+                // Reset `reloadOnRestartBoolean`.
+                reloadOnRestart = false;
+            }
 
-        // 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.
+            // Reset the return from settings flag.
+            reapplyAppSettingsOnRestart = false;
+        }
 
-                    // Store the variables for future use by `onRequestPermissionsResult()`.
-                    downloadUrl = url;
-                    downloadContentDisposition = contentDisposition;
-                    downloadContentLength = contentLength;
+        // TODO apply to all the tabs.
+        // Apply the domain settings if returning from the Domains activity.
+        if (reapplyDomainSettingsOnRestart) {
+            // Reapply the domain settings.
+            applyDomainSettings(currentWebView, formattedUrlString, false, 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);
+            // Reset `reapplyDomainSettingsOnRestart`.
+            reapplyDomainSettingsOnRestart = 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);
+        // Load the URL on restart to apply changes to night mode.
+        if (loadUrlOnRestart) {
+            // Load the current `formattedUrlString`.
+            loadUrl(formattedUrlString);
 
-                    // Show the download file alert dialog.
-                    downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                }
-            }
-        });
+            // Reset `loadUrlOnRestart.
+            loadUrlOnRestart = false;
+        }
 
-        // Allow pinch to zoom.
-        mainWebView.getSettings().setBuiltInZoomControls(true);
+        // 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);
 
-        // Hide zoom controls.
-        mainWebView.getSettings().setDisplayZoomControls(false);
+            // Close the bookmarks drawer.
+            drawerLayout.closeDrawer(GravityCompat.END);
 
-        // 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);
+            // Reload the bookmarks drawer.
+            loadBookmarksFolder();
 
-        // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
-        mainWebView.getSettings().setLoadWithOverviewMode(true);
+            // Reset `restartFromBookmarksActivity`.
+            restartFromBookmarksActivity = false;
+        }
 
-        // Explicitly disable geolocation.
-        mainWebView.getSettings().setGeolocationEnabled(false);
+        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
+        updatePrivacyIcons(true);
+    }
 
-        // Initialize cookieManager.
-        cookieManager = CookieManager.getInstance();
+    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
+    @Override
+    public void onResume() {
+        // Run the default commands.
+        super.onResume();
 
-        // 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", "");
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-        // 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);
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-        // Get a handle for the `Runtime`.
-        privacyBrowserRuntime = Runtime.getRuntime();
+            // 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);
 
-        // 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`.
+                // Resume the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.resumeTimers();
 
-        // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
-        inFullScreenBrowsingMode = false;
+                // Resume the nested scroll WebView.
+                nestedScrollWebView.onResume();
+            }
+        }
 
-        // 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;
+        // 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);
 
-        // Store the default user agent.
-        webViewDefaultUserAgent = mainWebView.getSettings().getUserAgentString();
+            // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
+            currentWebView.loadData(waitingForOrbotHtmlString, "text/html", null);
+        }
 
-        // Initialize the WebView title.
-        webViewTitle = getString(R.string.no_title);
+        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
+            // Get a handle for the root frame layouts.
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
 
-        // 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();
+            // 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);
 
-        // If the favorite icon is null, load the default.
-        if (favoriteIconBitmap == null) {
-            favoriteIconBitmap = favoriteIconDefaultBitmap;
+            /* 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 the user agent array adapter and string array.
-        userAgentNamesArray = ArrayAdapter.createFromResource(this, R.array.user_agent_names, R.layout.spinner_item);
-        userAgentDataArray = resources.getStringArray(R.array.user_agent_data);
-
-        // Apply the app settings from the shared preferences.
-        applyAppSettings();
+    @Override
+    public void onPause() {
+        // Run the default commands.
+        super.onPause();
 
-        // Instantiate the block list helper.
-        BlockListHelper blockListHelper = new BlockListHelper();
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-        // Initialize the list of resource requests.
-        resourceRequests = new ArrayList<>();
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-        // 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");
+            // 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);
 
-        // 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];
+                // Pause the nested scroll WebView.
+                nestedScrollWebView.onPause();
 
-        // Get a handle for the activity.  This is used to update the requests counter while the navigation menu is open.
-        Activity activity = this;
+                // Pause the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.pauseTimers();
+            }
+        }
 
-        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 = "";
+        // 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));
+        }
+    }
 
-                    // 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 void onDestroy() {
+        // Unregister the Orbot status broadcast receiver.
+        this.unregisterReceiver(orbotStatusBroadcastReceiver);
 
-                    // 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);
+        // Close the bookmarks cursor and database.
+        bookmarksCursor.close();
+        bookmarksDatabaseHelper.close();
 
-                        // 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);
+        // Run the default commands.
+        super.onDestroy();
+    }
 
-                    // Parse the url and set it as the data for the intent.
-                    emailIntent.setData(Uri.parse(url));
+    @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);
 
-                    // Open the email program in a new task instead of as part of Privacy Browser.
-                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
+        optionsMenu = menu;
 
-                    // Make it so.
-                    startActivity(emailIntent);
+        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
+        updatePrivacyIcons(false);
 
-                    // 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);
+        // 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);
 
-                    // Add the phone number to the intent.
-                    dialIntent.setData(Uri.parse(url));
+        // Only display third-party cookies if API >= 21
+        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 
-                    // Open the dialer in a new task instead of as part of Privacy Browser.
-                    dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-
-                    // Make it so.
-                    startActivity(dialIntent);
+        // 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 {  // 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);
+        // Only show Ad Consent if this is the free flavor.
+        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
 
-                    // Add the URL to the intent.
-                    genericIntent.setData(Uri.parse(url));
+        // Get the shared preference values.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // List all apps that can handle the URL instead of just opening the first one.
-                    genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
+        // Get the status of the additional AppBar icons.
+        displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
 
-                    // Open the app in a new task instead of as part of Privacy Browser.
-                    genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // 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);
+        }
 
-                    // 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();
-                    }
+        // Replace Refresh with Stop if a URL is already loading.
+        if (currentWebView != null && currentWebView.getProgress() != 100) {
+            // Set the title.
+            refreshMenuItem.setTitle(R.string.stop);
 
-                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
-                    return true;
+            // 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);
                 }
             }
+        }
 
-            // 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()));
-
-                // Reset the whitelist results tracker.
-                whiteListResultStringArray = null;
+        return true;
+    }
 
-                // Initialize the third party request tracker.
-                boolean isThirdPartyRequest = false;
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        // Get a handle for the swipe refresh layout.
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 
-                // Initialize the current domain string.
-                String currentDomain = "";
+        // 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);
 
-                // 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 a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
 
-                    // Get the domain host names.
-                    String currentBaseDomain = currentDomainUri.getHost();
-                    String requestBaseDomain = requestDomainUri.getHost();
+        // Initialize the current user agent string and the font size.
+        String currentUserAgent = getString(R.string.user_agent_privacy_browser);
+        int fontSize = 100;
 
-                    // Update the current domain variable.
-                    currentDomain = currentBaseDomain;
+        // 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);
+            }
 
-                    // 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);
-                        }
+            // 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.
+            toggleDomStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
+            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));
+            displayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
+
+            // 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));
+        }
 
-                        // 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);
-                        }
+        // Set the status of the menu item checkboxes.
+        toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
+        toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);  // Form data can be removed once the minimum API >= 26.
+        swipeToRefreshMenuItem.setChecked(swipeRefreshLayout.isEnabled());
+        nightModeMenuItem.setChecked(nightMode);
+        proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
 
-                        // Update the third party request tracker.
-                        isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
-                    }
-                }
+        // Only modify third-party cookies if the API >= 21.
+        if (Build.VERSION.SDK_INT >= 21) {
+            // Set the status of the third-party cookies checkbox.
+            toggleThirdPartyCookiesMenuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
 
-                // 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 third-party cookies if first-party cookies are enabled.
+            toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
+        }
 
-                    // Add the request to the log.
-                    resourceRequests.add(new String[]{String.valueOf(REQUEST_THIRD_PARTY), url});
+        // Enable DOM Storage if JavaScript is enabled.
+        toggleDomStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
 
-                    // Return an empty web resource response.
-                    return emptyWebResourceResponse;
-                }
+        // Enable Clear Cookies if there are any.
+        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
 
-                // Check UltraPrivacy if it is enabled.
-                if (ultraPrivacyEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, ultraPrivacy)) {
-                        // Increment the blocked requests counters.
-                        blockedRequests++;
-                        ultraPrivacyBlockedRequests++;
+        // 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 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));
-                        });
+        // 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;
+        }
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
+        // Enable Clear DOM Storage if there is any.
+        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
 
-                    // 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);
+        // 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);
+        }
 
-                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
-                        return null;
-                    }
-                }
+        // Enable Clear Data if any of the submenu items are enabled.
+        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
 
-                // Check EasyList if it is enabled.
-                if (easyListEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyList)) {
-                        // Increment the blocked requests counters.
-                        blockedRequests++;
-                        easyListBlockedRequests++;
+        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
+        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
 
-                        // 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));
-                        });
+        // 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);
+        }
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+        // Instantiate the font size title and the selected font size menu item.
+        String fontSizeTitle;
+        MenuItem selectedFontSizeMenuItem;
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                }
+        // 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;
 
-                // Check EasyPrivacy if it is enabled.
-                if (easyPrivacyEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyPrivacy)) {
-                        // Increment the blocked requests counters.
-                        blockedRequests++;
-                        easyPrivacyBlockedRequests++;
+            case 50:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_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));
-                        });
+            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;
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = 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;
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                }
+            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;
 
-                // 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++;
+            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;
 
-                        // 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));
-                        });
+            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;
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+            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;
 
-                        // 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++;
+            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);
-                            fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
-                        });
+        // 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;
+    }
 
-                // 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});
-                }
+    @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) {
+        // 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);
 
-                // The resource request has not been blocked.  `return null` loads the requested resource.
-                return null;
-            }
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
 
-            // 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;
+            /* 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);
+        }
 
-                // Display the HTTP authentication dialog.
-                AppCompatDialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
-                httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
-            }
+        // Get the selected menu item ID.
+        int menuItemId = menuItem.getItemId();
 
-            // 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();
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                // Initialize the counters for requests blocked by each blocklist.
-                blockedRequests = 0;
-                easyListBlockedRequests = 0;
-                easyPrivacyBlockedRequests = 0;
-                fanboysAnnoyanceListBlockedRequests = 0;
-                fanboysSocialBlockingListBlockedRequests = 0;
-                ultraPrivacyBlockedRequests = 0;
-                thirdPartyBlockedRequests = 0;
+        // Get a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
 
-                // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
-                if (nightMode) {
-                    mainWebView.setVisibility(View.INVISIBLE);
-                }
+        // 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());
 
-                // Hide the keyboard.  `0` indicates no additional flags.
-                inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-                // 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;
+                // 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 (firstPartyCookiesEnabled) {  // 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();
+                }
 
-                    // 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.add_or_edit_domain:
+                if (currentWebView.getDomainSettingsApplied()) {  // Edit the current domain settings.
+                    // Reapply the domain settings on returning to `MainWebViewActivity`.
+                    reapplyDomainSettingsOnRestart = true;
+                    currentWebView.resetCurrentDomainName();
 
-                    // 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);
+                    // TODO.  Move these to `putExtra`.  The certificate can be stored as strings.
+                    // Store the current SSL certificate and IP addresses in the domains activity.
+                    DomainsActivity.currentSslCertificate = currentWebView.getCertificate();
+                    DomainsActivity.currentIpAddresses = currentWebView.getCurrentIpAddresses();
 
-                        // Reset `navigatingHistory`.
-                        navigatingHistory = false;
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-                        // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
-                        if (userAgentChanged) {
-                            loadUrl(formattedUrlString);
-                        }
-                    }
+                    // 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("load_domain", currentWebView.getDomainSettingsDatabaseId());
+                    domainsIntent.putExtra("close_on_back", 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;
+                    // Make it so.
+                    startActivity(domainsIntent);
+                } else {  // Add a new domain.
+                    // Apply the new domain settings on returning to `MainWebViewActivity`.
+                    reapplyDomainSettingsOnRestart = true;
+                    currentWebView.resetCurrentDomainName();
 
-                    // 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);
+                    // Get the current domain
+                    Uri currentUri = Uri.parse(formattedUrlString);
+                    String currentDomain = currentUri.getHost();
 
-                        // 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);
-                            }
-                        }
-                    }
-                }
-            }
+                    // 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);
 
-            // 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);
-                }
+                    // Create the domain and store the database ID.
+                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
 
-                // 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();
-                }
+                    // TODO.  Move these to `putExtra`.  The certificate can be stored as strings.
+                    // Store the current SSL certificate and IP addresses in the domains activity.
+                    DomainsActivity.currentSslCertificate = currentWebView.getCertificate();
+                    DomainsActivity.currentIpAddresses = currentWebView.getCurrentIpAddresses();
 
-                // Update the Refresh menu item if it has been created.
-                if (refreshMenuItem != null) {
-                    // Reset the Refresh title.
-                    refreshMenuItem.setTitle(R.string.refresh);
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-                    // 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);
-                        }
-                    }
+                    // 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("load_domain", newDomainDatabaseId);
+                    domainsIntent.putExtra("close_on_back", true);
+
+                    // Make it so.
+                    startActivity(domainsIntent);
                 }
+                return true;
 
-                // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
-                urlIsLoading = false;
+            case R.id.toggle_first_party_cookies:
+                // Switch the status of firstPartyCookiesEnabled.
+                firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
 
-                // Clear the cache and history if Incognito Mode is enabled.
-                if (incognitoModeEnabled) {
-                    // Clear the cache.  `true` includes disk files.
-                    mainWebView.clearCache(true);
+                // Update the menu checkbox.
+                menuItem.setChecked(firstPartyCookiesEnabled);
 
-                    // Clear the back/forward history.
-                    mainWebView.clearHistory();
+                // Apply the new cookie status.
+                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
 
-                    // Manually delete cache folders.
-                    try {
-                        // Delete the main cache directory.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                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 (firstPartyCookiesEnabled) {  // 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 `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 = "";
-
-                        urlTextBox.setText(formattedUrlString);
-
-                        // Request focus for `urlTextBox`.
-                        urlTextBox.requestFocus();
-
-                        // Display the keyboard.
-                        inputMethodManager.showSoftInput(urlTextBox, 0);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                        // 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;
+            case R.id.toggle_third_party_cookies:
+                if (Build.VERSION.SDK_INT >= 21) {
+                    // Switch the status of thirdPartyCookiesEnabled.
+                    cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
 
-                        // Only update `urlTextBox` if the user is not typing in it.
-                        if (!urlTextBox.hasFocus()) {
-                            // Display the formatted URL text.
-                            urlTextBox.setText(formattedUrlString);
+                    // Update the menu checkbox.
+                    menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
 
-                            // Apply text highlighting to `urlTextBox`.
-                            highlightUrlText();
-                        }
+                    // 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();
                     }
 
-                    // 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();
-                        }
-
-                        // 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 = "";
-
-                        // Convert the `Dates` to `Strings` if they are not `null`.
-                        if (currentWebsiteSslStartDate != null) {
-                            currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString();
-                        }
+                    // Reload the current WebView.
+                    currentWebView.reload();
+                } // Else do nothing because SDK < 21.
+                return true;
 
-                        if (currentWebsiteSslEndDate != null) {
-                            currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString();
-                        }
+            case R.id.toggle_dom_storage:
+                // Toggle the status of domStorageEnabled.
+                currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
 
-                        if (pinnedDomainSslStartDate != null) {
-                            pinnedDomainSslStartDateString = pinnedDomainSslStartDate.toString();
-                        }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
 
-                        if (pinnedDomainSslEndDate != null) {
-                            pinnedDomainSslEndDateString = pinnedDomainSslEndDate.toString();
-                        }
+                // Update the privacy icon.  `true` refreshes the app bar icons.
+                updatePrivacyIcons(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));
-                        }
-                    }
+                // 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();
                 }
-            }
 
-            // Handle SSL Certificate errors.
-            @Override
-            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
-                // Get the current website SSL certificate.
-                SslCertificate currentWebsiteSslCertificate = error.getCertificate();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                // 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();
+            // Form data can be removed once the minimum API >= 26.
+            case R.id.toggle_save_form_data:
+                // Switch the status of saveFormDataEnabled.
+                saveFormDataEnabled = !saveFormDataEnabled;
 
-                // 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;
+                // Update the menu checkbox.
+                menuItem.setChecked(saveFormDataEnabled);
 
-                    // Display the SSL error `AlertDialog`.
-                    AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
-                    sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
+                // Apply the new form data status.
+                currentWebView.getSettings().setSaveFormData(saveFormDataEnabled);
+
+                // Display a `Snackbar`.
+                if (saveFormDataEnabled) {
+                    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();
                 }
-            }
-        });
 
-        // Get the intent that started the app.
-        Intent launchingIntent = getIntent();
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-        // 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.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) {
+                                switch (event) {
+                                    // The user pushed the undo button.
+                                    case Snackbar.Callback.DISMISS_EVENT_ACTION:
+                                        // Do nothing.
+                                        break;
 
-            // Sanitize the search input and convert it to a search.
-            try {
-                encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
-            }
+                                    // 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 {
+                                            cookieManager.removeAllCookies(null);
+                                        }
+                                }
+                            }
+                        })
+                        .show();
+                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.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) {
+                                switch (event) {
+                                    // The user pushed the undo button.
+                                    case Snackbar.Callback.DISMISS_EVENT_ACTION:
+                                        // Do nothing.
+                                        break;
 
-        // Load the website if not waiting for Orbot to connect.
-        if (!waitingForOrbot) {
-            loadUrl(formattedUrlString);
-        }
-    }
+                                    // The snackbar was dismissed without the undo button being pushed.
+                                    default:
+                                        // Delete the DOM Storage.
+                                        WebStorage webStorage = WebStorage.getInstance();
+                                        webStorage.deleteAllData();
 
-    @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);
+                                        // Initialize a handler to manually delete the DOM storage files and directories.
+                                        Handler deleteDomStorageHandler = new Handler();
 
-        // Get the information from the intent.
-        String intentAction = intent.getAction();
-        Uri intentUriData = intent.getData();
+                                        // 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();
 
-        // 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;
+                                                // 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/"});
 
-            // Sanitize the search input and convert it to a search.
-            try {
-                encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
-            }
+                                                // 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.
+                                            }
+                                        };
 
-            // 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();
-        }
+                                        // Manually delete the DOM storage files after 200 milliseconds.
+                                        deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
+                                }
+                            }
+                        })
+                        .show();
+                return true;
 
-        // Load the URL.
-        loadUrl(formattedUrlString);
+            // 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) {
+                                switch (event) {
+                                    // The user pushed the undo button.
+                                    case Snackbar.Callback.DISMISS_EVENT_ACTION:
+                                        // Do nothing.
+                                        break;
 
-        // Close the navigation drawer if it is open.
-        if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
-            drawerLayout.closeDrawer(GravityCompat.START);
-        }
+                                    // 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;
 
-        // Close the bookmarks drawer if it is open.
-        if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
-            drawerLayout.closeDrawer(GravityCompat.END);
-        }
+            case R.id.easylist:
+                // Toggle the EasyList status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASY_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
 
-        // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
-        mainWebView.requestFocus();
-    }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
 
-    @Override
-    public void onRestart() {
-        // Run the default commands.
-        super.onRestart();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // 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");
+            case R.id.easyprivacy:
+                // Toggle the EasyPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
 
-            // Send the intent to the Orbot package.
-            orbotIntent.setPackage("org.torproject.android");
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
 
-            // 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.fanboys_annoyance_list:
+                // Toggle Fanboy's Annoyance List status.
+                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-            // Reload the webpage if displaying of images has been disabled in the Settings activity.
-            if (reloadOnRestart) {
-                // Reload `mainWebView`.
-                mainWebView.reload();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-                // Reset `reloadOnRestartBoolean`.
-                reloadOnRestart = false;
-            }
+                // 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));
 
-            // 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.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));
 
-            // Reset `reapplyDomainSettingsOnRestart`.
-            reapplyDomainSettingsOnRestart = false;
-        }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
 
-        // Load the URL on restart to apply changes to night mode.
-        if (loadUrlOnRestart) {
-            // Load the current `formattedUrlString`.
-            loadUrl(formattedUrlString);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // Reset `loadUrlOnRestart.
-            loadUrlOnRestart = false;
-        }
+            case R.id.ultraprivacy:
+                // Toggle the UltraPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.ULTRA_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
 
-        // Update the bookmarks drawer if returning from the Bookmarks activity.
-        if (restartFromBookmarksActivity) {
-            // Close the bookmarks drawer.
-            drawerLayout.closeDrawer(GravityCompat.END);
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
 
-            // Reload the bookmarks drawer.
-            loadBookmarksFolder();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // Reset `restartFromBookmarksActivity`.
-            restartFromBookmarksActivity = false;
-        }
+            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));
 
-        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
-        updatePrivacyIcons(true);
-    }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-    // `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_privacy_browser:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
 
-        // 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_webview_default:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString("");
 
-        // 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.user_agent_firefox_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
 
-        if (displayingFullScreenVideo) {
-            // Remove the translucent overlays.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                // Reload the current WebView.
+                currentWebView.reload();
+                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.user_agent_chrome_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
 
-            /* 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);
-        }
-    }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-    @Override
-    public void onPause() {
-        // Run the default commands.
-        super.onPause();
+            case R.id.user_agent_safari_on_ios:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
 
-        // Pause `mainWebView`.
-        mainWebView.onPause();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Stop all JavaScript.
-        mainWebView.pauseTimers();
+            case R.id.user_agent_firefox_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
 
-        // 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));
-        }
-    }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-    @Override
-    public void onDestroy() {
-        // Unregister the Orbot status broadcast receiver.
-        this.unregisterReceiver(orbotStatusBroadcastReceiver);
+            case R.id.user_agent_chromium_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
 
-        // Close the bookmarks cursor and database.
-        bookmarksCursor.close();
-        bookmarksDatabaseHelper.close();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Run the default commands.
-        super.onDestroy();
-    }
+            case R.id.user_agent_firefox_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
 
-    @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);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
-        mainMenu = menu;
+            case R.id.user_agent_chrome_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
 
-        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
-        updatePrivacyIcons(false);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // 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);
+            case R.id.user_agent_edge_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
 
-        // Only display third-party cookies if API >= 21
-        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // 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);
+            case R.id.user_agent_internet_explorer_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
 
-        // Only show Ad Consent if this is the free flavor.
-        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Get the shared preference values.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+            case R.id.user_agent_safari_on_macos:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
 
-        // Get the status of the additional AppBar icons.
-        displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // 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);
-        }
+            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)));
 
-        // Replace Refresh with Stop if a URL is already loading.
-        if (urlIsLoading) {
-            // Set the title.
-            refreshMenuItem.setTitle(R.string.stop);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // 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);
-                }
-            }
-        }
+            case R.id.font_size_twenty_five_percent:
+                currentWebView.getSettings().setTextZoom(25);
+                return true;
 
-        return true;
-    }
+            case R.id.font_size_fifty_percent:
+                currentWebView.getSettings().setTextZoom(50);
+                return true;
 
-    @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);
+            case R.id.font_size_seventy_five_percent:
+                currentWebView.getSettings().setTextZoom(75);
+                return true;
 
-        // 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);
-        }
+            case R.id.font_size_one_hundred_percent:
+                currentWebView.getSettings().setTextZoom(100);
+                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.font_size_one_hundred_twenty_five_percent:
+                currentWebView.getSettings().setTextZoom(125);
+                return true;
 
-        // Enable third-party cookies if first-party cookies are enabled.
-        toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
+            case R.id.font_size_one_hundred_fifty_percent:
+                currentWebView.getSettings().setTextZoom(150);
+                return true;
 
-        // Enable DOM Storage if JavaScript is enabled.
-        toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
+            case R.id.font_size_one_hundred_seventy_five_percent:
+                currentWebView.getSettings().setTextZoom(175);
+                return true;
 
-        // Enable Clear Cookies if there are any.
-        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
+            case R.id.font_size_two_hundred_percent:
+                currentWebView.getSettings().setTextZoom(200);
+                return true;
 
-        // Get a count of the number of files in the Local Storage directory.
-        File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
-        int localStorageDirectoryNumberOfFiles = 0;
-        if (localStorageDirectory.exists()) {
-            localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
-        }
+            case R.id.swipe_to_refresh:
+                // Get a handle for the swipe refresh layout.
+                SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 
-        // 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;
-        }
+                // Toggle swipe to refresh.
+                swipeRefreshLayout.setEnabled(!swipeRefreshLayout.isEnabled());
+                return true;
 
-        // Enable Clear DOM Storage if there is any.
-        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
+            case R.id.display_images:
+                if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
+                    // Disable loading of images.
+                    currentWebView.getSettings().setLoadsImagesAutomatically(false);
 
-        // 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);
-        }
+                    // 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;
 
-        // Enable Clear Data if any of the submenu items are enabled.
-        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
+            case R.id.night_mode:
+                // Toggle night mode.
+                nightMode = !nightMode;
 
-        // Disable Fanboy's Social Blocking List if Fanboy's Annoyance List is checked.
-        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
+                // Enable or disable JavaScript according to night mode, the global preference, and any domain settings.
+                if (nightMode) {  // 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(domainSettingsJavaScriptEnabled);
+                } 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));
+                }
 
-        // 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));
+                // Update the privacy icons.
+                updatePrivacyIcons(false);
 
-        // Get the current user agent.
-        String currentUserAgent = mainWebView.getSettings().getUserAgentString();
+                // Reload the website.
+                currentWebView.reload();
+                return true;
 
-        // 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);
-        }
+            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);
 
-        // Initialize font size variables.
-        int fontSize = mainWebView.getSettings().getTextZoom();
-        String fontSizeTitle;
-        MenuItem selectedFontSizeMenuItem;
+                // Hide the toolbar.
+                toolbar.setVisibility(View.GONE);
 
-        // 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;
+                // Show the find on page linear layout.
+                findOnPageLinearLayout.setVisibility(View.VISIBLE);
 
-            case 50:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
-                break;
+                // 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();
 
-            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;
+                    // Display the keyboard.  `0` sets no input flags.
+                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
+                }, 200);
+                return true;
 
-            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 R.id.view_source:
+                // Create an intent to launch the view source activity.
+                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
 
-            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;
+                // Add the user agent as an extra to the intent.
+                viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
 
-            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;
+                // Make it so.
+                startActivity(viewSourceIntent);
+                return true;
 
-            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 R.id.share_url:
+                // Setup the share string.
+                String shareString = currentWebView.getTitle() + " – " + formattedUrlString;
 
-            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;
+                // Create the share intent.
+                Intent shareIntent = new Intent(Intent.ACTION_SEND);
+                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
+                shareIntent.setType("text/plain");
 
-            default:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                break;
-        }
+                // Make it so.
+                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
+                return true;
 
-        // Set the font size title and select the current size menu item.
-        fontSizeMenuItem.setTitle(fontSizeTitle);
-        selectedFontSizeMenuItem.setChecked(true);
+            case R.id.print:
+                // Get a `PrintManager` instance.
+                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
 
-        // Run all the other default commands.
-        super.onPrepareOptionsMenu(menu);
+                // Create a print document adapter form the current WebView.
+                PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
 
-        // Display the menu.
-        return true;
-    }
+                // Remove the lint error below that `printManager` might be `null`.
+                assert printManager != null;
 
-    @Override
-    // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
-    @SuppressLint("SetJavaScriptEnabled")
-    // removeAllCookies is deprecated, but it is required for API < 21.
-    @SuppressWarnings("deprecation")
-    public boolean onOptionsItemSelected(MenuItem menuItem) {
-        // Get the selected menu item ID.
-        int menuItemId = menuItem.getItemId();
+                // Print the document.  The print attributes are `null`.
+                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
+                return true;
 
-        // Set the commands that relate to the menu entries.
-        switch (menuItemId) {
-            case R.id.toggle_javascript:
-                // Switch the status of javaScriptEnabled.
-                javaScriptEnabled = !javaScriptEnabled;
+            case R.id.open_with_app:
+                openWithApp(formattedUrlString);
+                return true;
 
-                // Apply the new JavaScript status.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
+            case R.id.open_with_browser:
+                openWithBrowser(formattedUrlString);
+                return true;
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+            case R.id.add_to_homescreen:
+                // Instantiate the create home screen shortcut dialog.
+                DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), formattedUrlString, currentWebView.getFavoriteOrDefaultIcon());
 
-                // 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();
+                // Show the create home screen shortcut dialog.
+                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
+                return true;
+
+            case R.id.proxy_through_orbot:
+                // Toggle the proxy through Orbot variable.
+                proxyThroughOrbot = !proxyThroughOrbot;
+
+                // Apply the proxy through Orbot settings.
+                applyProxyThroughOrbot(true);
+                return true;
+
+            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;
 
-                // Reload the WebView.
-                mainWebView.reload();
+            case R.id.ad_consent:
+                // Display the ad consent dialog.
+                DialogFragment adConsentDialogFragment = new AdConsentDialog();
+                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
                 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 = "";
+            default:
+                // Don't consume the event.
+                return super.onOptionsItemSelected(menuItem);
+        }
+    }
 
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+    // removeAllCookies is deprecated, but it is required for API < 21.
+    @SuppressWarnings("deprecation")
+    @Override
+    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
+        // Get the menu item ID.
+        int menuItemId = menuItem.getItemId();
 
-                    // 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);
+        // Run the commands that correspond to the selected menu item.
+        switch (menuItemId) {
+            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);
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                } else {  // Add a new domain.
-                    // Apply the new domain settings on returning to `MainWebViewActivity`.
-                    reapplyDomainSettingsOnRestart = true;
-                    currentDomainName = "";
+                // Get the current tab number.
+                int currentTabNumber = tabLayout.getSelectedTabPosition();
 
-                    // Get the current domain
-                    Uri currentUri = Uri.parse(formattedUrlString);
-                    String currentDomain = currentUri.getHost();
+                // Delete the current tab.
+                tabLayout.removeTabAt(currentTabNumber);
 
-                    // 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);
+                // 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;
 
-                    // Create the domain and store the database ID.
-                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
+            case R.id.clear_and_exit:
+                // Close the bookmarks cursor and database.
+                bookmarksCursor.close();
+                bookmarksDatabaseHelper.close();
 
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                // Get a handle for the shared preferences.
+                SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // 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);
+                // Get the status of the clear everything preference.
+                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
 
-                    // Make it so.
-                    startActivity(domainsIntent);
+                // Get a handle for the runtime.
+                Runtime runtime = Runtime.getRuntime();
+
+                // Clear cookies.
+                if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
+                    // The command to remove cookies changed slightly in API 21.
+                    if (Build.VERSION.SDK_INT >= 21) {
+                        CookieManager.getInstance().removeAllCookies(null);
+                    } else {
+                        CookieManager.getInstance().removeAllCookie();
+                    }
+
+                    // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+                    try {
+                        // Two commands must be used because `Runtime.exec()` does not like `*`.
+                        Process deleteCookiesProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
+                        Process deleteCookiesJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
+
+                        // Wait until the processes have finished.
+                        deleteCookiesProcess.waitFor();
+                        deleteCookiesJournalProcess.waitFor();
+                    } catch (Exception exception) {
+                        // Do nothing if an error is thrown.
+                    }
                 }
-                return true;
 
-            case R.id.toggle_first_party_cookies:
-                // Switch the status of firstPartyCookiesEnabled.
-                firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
+                // Clear DOM storage.
+                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
+                    // Ask `WebStorage` to clear the DOM storage.
+                    WebStorage webStorage = WebStorage.getInstance();
+                    webStorage.deleteAllData();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(firstPartyCookiesEnabled);
+                    // 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/"});
 
-                // Apply the new cookie status.
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
+                        // 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.
+                    }
+                }
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // 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();
 
-                // 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();
+                    // 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.
+                    }
                 }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return 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);
 
-            case R.id.toggle_third_party_cookies:
-                if (Build.VERSION.SDK_INT >= 21) {
-                    // Switch the status of thirdPartyCookiesEnabled.
-                    thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
+                        // Get the fragment view.
+                        View fragmentView = webViewTabFragment.getView();
 
-                    // Update the menu checkbox.
-                    menuItem.setChecked(thirdPartyCookiesEnabled);
+                        // 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);
+
+                            // Clear the cache for this WebView.
+                            nestedScrollWebView.clearCache(true);
+                        }
+                    }
+
+                    // 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 formatted URL string.
+                formattedUrlString = null;
 
-            // Form data can be removed once the minimum API >= 26.
-            case R.id.toggle_save_form_data:
-                // Switch the status of saveFormDataEnabled.
-                saveFormDataEnabled = !saveFormDataEnabled;
+                // Clear the custom headers.
+                customHeaders.clear();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(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");
 
-                // Apply the new form data status.
-                mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
+                        // Wait until the process has finished.
+                        deleteAppWebviewProcess.waitFor();
+                    } catch (Exception exception) {
+                        // Do nothing if an error is thrown.
+                    }
+                }
 
-                // Display a `Snackbar`.
-                if (saveFormDataEnabled) {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
+                // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    finishAndRemoveTask();
                 } else {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
+                    finish();
                 }
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // Remove the terminated program from RAM.  The status code is `0`.
+                System.exit(0);
+                break;
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+            case R.id.home:
+                loadUrl(homepage);
+                break;
 
-            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;
+            case R.id.back:
+                if (currentWebView.canGoBack()) {
+                    // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
+                    formattedUrlString = "";
 
-                                    // 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;
+                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
+                    navigatingHistory = true;
 
-            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;
+                    // Load the previous website in the history.
+                    currentWebView.goBack();
+                }
+                break;
 
-                                    // The `Snackbar` was dismissed without the `Undo` button being pushed.
-                                    default:
-                                        // Delete the DOM Storage.
-                                        WebStorage webStorage = WebStorage.getInstance();
-                                        webStorage.deleteAllData();
+            case R.id.forward:
+                if (currentWebView.canGoForward()) {
+                    // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
+                    formattedUrlString = "";
 
-                                        // Initialize a handler to manually delete the DOM storage files and directories.
-                                        Handler deleteDomStorageHandler = new Handler();
+                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
+                    navigatingHistory = true;
 
-                                        // 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/"});
+                    // Load the next website in the history.
+                    currentWebView.goForward();
+                }
+                break;
 
-                                                // 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.
-                                            }
-                                        };
+            case R.id.history:
+                // Get the `WebBackForwardList`.
+                WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-                                        // Manually delete the DOM storage files after 200 milliseconds.
-                                        deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+                // Show the URL history dialog and name this instance `R.string.history`.
+                DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(this, webBackForwardList);
+                urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
+                break;
 
-            // 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;
+            case R.id.requests:
+                // Populate the resource requests.
+                RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
 
-                                    // 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;
+                // Create an intent to launch the Requests activity.
+                Intent requestsIntent = new Intent(this, RequestsActivity.class);
 
-            case R.id.easylist:
-                // Toggle the EasyList status.
-                easyListEnabled = !easyListEnabled;
+                // Add the block third-party requests status to the intent.
+                requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-                // Update the menu checkbox.
-                menuItem.setChecked(easyListEnabled);
+                // Make it so.
+                startActivity(requestsIntent);
+                break;
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+            case R.id.downloads:
+                // Launch the system Download Manager.
+                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
 
-            case R.id.easyprivacy:
-                // Toggle the EasyPrivacy status.
-                easyPrivacyEnabled = !easyPrivacyEnabled;
+                // 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);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(easyPrivacyEnabled);
+                startActivity(downloadManagerIntent);
+                break;
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+            case R.id.domains:
+                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
+                reapplyDomainSettingsOnRestart = true;
+                currentWebView.resetCurrentDomainName();  // TODO.  Do this for all tabs.
 
-            case R.id.fanboys_annoyance_list:
-                // Toggle Fanboy's Annoyance List status.
-                fanboysAnnoyanceListEnabled = !fanboysAnnoyanceListEnabled;
+                // TODO.  Move these to `putExtra`.  The certificate can be stored as strings.
+                // Store the current SSL certificate and IP addresses in the domains activity.
+                DomainsActivity.currentSslCertificate = currentWebView.getCertificate();
+                DomainsActivity.currentIpAddresses = currentWebView.getCurrentIpAddresses();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(fanboysAnnoyanceListEnabled);
+                // Launch the domains activity.
+                Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                startActivity(domainsIntent);
+                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.settings:
+                // Set the flag to reapply app settings on restart when returning from Settings.
+                reapplyAppSettingsOnRestart = true;
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+                // Set the flag to reapply the domain settings on restart when returning from Settings.
+                reapplyDomainSettingsOnRestart = true;
+                currentWebView.resetCurrentDomainName();  // TODO.  Do this for all tabs.
 
-            case R.id.fanboys_social_blocking_list:
-                // Toggle Fanboy's Social Blocking List status.
-                fanboysSocialBlockingListEnabled = !fanboysSocialBlockingListEnabled;
+                // Launch the settings activity.
+                Intent settingsIntent = new Intent(this, SettingsActivity.class);
+                startActivity(settingsIntent);
+                break;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(fanboysSocialBlockingListEnabled);
+            case R.id.import_export:
+                // Launch the import/export activity.
+                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
+                startActivity(importExportIntent);
+                break;
 
-                // Reload the main 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.ultraprivacy:
-                // Toggle the UltraPrivacy status.
-                ultraPrivacyEnabled = !ultraPrivacyEnabled;
+            case R.id.guide:
+                // Launch `GuideActivity`.
+                Intent guideIntent = new Intent(this, GuideActivity.class);
+                startActivity(guideIntent);
+                break;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(ultraPrivacyEnabled);
+            case R.id.about:
+                // Launch `AboutActivity`.
+                Intent aboutIntent = new Intent(this, AboutActivity.class);
+                startActivity(aboutIntent);
+                break;
+        }
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+        // Get a handle for the drawer layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-            case R.id.block_all_third_party_requests:
-                //Toggle the third-party requests blocker status.
-                blockAllThirdPartyRequests = !blockAllThirdPartyRequests;
+        // Close the navigation drawer.
+        drawerLayout.closeDrawer(GravityCompat.START);
+        return true;
+    }
 
-                // Update the menu checkbox.
-                menuItem.setChecked(blockAllThirdPartyRequests);
+    @Override
+    public void onPostCreate(Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onPostCreate(savedInstanceState);
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
+        actionBarDrawerToggle.syncState();
+    }
 
-            case R.id.user_agent_privacy_browser:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        // Run the default commands.
+        super.onConfigurationChanged(newConfig);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-            case R.id.user_agent_webview_default:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString("");
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Recalculate the drawer header padding.
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
 
-            case R.id.user_agent_firefox_on_android:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
+        // 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));
+        }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // `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);
+    }
 
-            case R.id.user_agent_chrome_on_android:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
+        // Store the `HitTestResult`.
+        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Create strings.
+        final String imageUrl;
+        final String linkUrl;
 
-            case R.id.user_agent_safari_on_ios:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
+        // Get a handle for the the clipboard and fragment managers.
+        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+        FragmentManager fragmentManager = getSupportFragmentManager();
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Remove the lint errors below that `clipboardManager` might be `null`.
+        assert clipboardManager != null;
 
-            case R.id.user_agent_firefox_on_linux:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
+        switch (hitTestResult.getType()) {
+            // `SRC_ANCHOR_TYPE` is a link.
+            case WebView.HitTestResult.SRC_ANCHOR_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-            case R.id.user_agent_chromium_on_linux:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
+                // Add a Load URL entry.
+                menu.add(R.string.load_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    loadUrl(linkUrl);
+                    return false;
+                });
 
-                // Reload the WebView.
-                mainWebView.reload();
-                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.user_agent_firefox_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
+                    return false;
+                });
 
-                // Reload the WebView.
-                mainWebView.reload();
-                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 (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;
 
-            case R.id.user_agent_chrome_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
+                            // 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);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                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.user_agent_edge_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
+                            // Show the download file alert dialog.
+                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
+                    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.user_agent_internet_explorer_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(linkUrl);
+                    return false;
+                });
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Add a Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
 
-            case R.id.user_agent_safari_on_macos:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
+            case WebView.HitTestResult.EMAIL_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-            case R.id.user_agent_custom:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
+                // 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);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                    // Parse the url and set it as the data for the `Intent`.
+                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
 
-            case R.id.font_size_twenty_five_percent:
-                mainWebView.getSettings().setTextZoom(25);
-                return true;
+                    // `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);
 
-            case R.id.font_size_fifty_percent:
-                mainWebView.getSettings().setTextZoom(50);
-                return true;
+                    // Make it so.
+                    startActivity(emailIntent);
+                    return false;
+                });
 
-            case R.id.font_size_seventy_five_percent:
-                mainWebView.getSettings().setTextZoom(75);
-                return true;
+                // 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 R.id.font_size_one_hundred_percent:
-                mainWebView.getSettings().setTextZoom(100);
-                return true;
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
+                    return false;
+                });
 
-            case R.id.font_size_one_hundred_twenty_five_percent:
-                mainWebView.getSettings().setTextZoom(125);
-                return true;
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
+                break;
 
-            case R.id.font_size_one_hundred_fifty_percent:
-                mainWebView.getSettings().setTextZoom(150);
-                return true;
+            // `IMAGE_TYPE` is an image.
+            case WebView.HitTestResult.IMAGE_TYPE:
+                // Get the image URL.
+                imageUrl = hitTestResult.getExtra();
 
-            case R.id.font_size_one_hundred_seventy_five_percent:
-                mainWebView.getSettings().setTextZoom(175);
-                return true;
+                // Set the image URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(imageUrl);
 
-            case R.id.font_size_two_hundred_percent:
-                mainWebView.getSettings().setTextZoom(200);
-                return true;
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
+                    loadUrl(imageUrl);
+                    return false;
+                });
 
-            case R.id.swipe_to_refresh:
-                // Toggle swipe to refresh.
-                swipeRefreshLayout.setEnabled(!swipeRefreshLayout.isEnabled());
-                return true;
-
-            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;
-
-            case R.id.night_mode:
-                // Toggle night mode.
-                nightMode = !nightMode;
-
-                // 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);
-
-                    // Get the JavaScript preference.
-                    javaScriptEnabled = sharedPreferences.getBoolean("javascript", false);
-                }
-
-                // Apply the JavaScript setting to the WebView.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
+                // 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;
 
-                // Update the privacy icons.
-                updatePrivacyIcons(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);
 
-                // Reload the website.
-                mainWebView.reload();
-                return true;
+                                // 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.print:
-                // Get a `PrintManager` instance.
-                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
+                    return false;
+                });
 
-                // Convert `mainWebView` to `printDocumentAdapter`.
-                PrintDocumentAdapter printDocumentAdapter = mainWebView.createPrintDocumentAdapter();
+                // 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);
 
-                // Remove the lint error below that `printManager` might be `null`.
-                assert printManager != null;
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcImageTypeClipData);
+                    return false;
+                });
 
-                // Print the document.  The print attributes are `null`.
-                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
-                return true;
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(imageUrl);
+                    return false;
+                });
 
-            case R.id.view_source:
-                // Launch the View Source activity.
-                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
-                startActivity(viewSourceIntent);
-                return true;
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(imageUrl);
+                    return false;
+                });
 
-            case R.id.proxy_through_orbot:
-                // Toggle the proxy through Orbot variable.
-                proxyThroughOrbot = !proxyThroughOrbot;
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
+                break;
 
-                // Apply the proxy through Orbot settings.
-                applyProxyThroughOrbot(true);
-                return true;
 
-            case R.id.share:
-                // Setup the share string.
-                String shareString = webViewTitle + " – " + urlTextBox.getText().toString();
+            // `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();
 
-                // Create the share intent.
-                Intent shareIntent = new Intent(Intent.ACTION_SEND);
-                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
-                shareIntent.setType("text/plain");
+                // Set the image URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(imageUrl);
 
-                // Make it so.
-                startActivity(Intent.createChooser(shareIntent, "Share URL"));
-                return true;
+                // Add a `View Image` entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
+                    loadUrl(imageUrl);
+                    return false;
+                });
 
-            case R.id.find_on_page:
-                // Hide the URL app bar.
-                supportAppBar.setVisibility(View.GONE);
+                // 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;
 
-                // Show the Find on Page `RelativeLayout`.
-                findOnPageLinearLayout.setVisibility(View.VISIBLE);
+                            // 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);
 
-                // 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();
+                                // 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);
 
-                    // Display the keyboard.  `0` sets no input flags.
-                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
-                }, 200);
-                return true;
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
+                    return false;
+                });
 
-            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));
+                // 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);
 
-                //Everything else will be handled by `CreateHomeScreenShortcutDialog` and the associated listener below.
-                return true;
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
+                    return false;
+                });
 
-            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;
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(imageUrl);
+                    return false;
+                });
 
-            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 an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(imageUrl);
+                    return false;
+                });
 
-            default:
-                // Don't consume the event.
-                return super.onOptionsItemSelected(menuItem);
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
+                break;
         }
     }
 
-    // removeAllCookies is deprecated, but it is required for API < 21.
-    @SuppressWarnings("deprecation")
     @Override
-    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
-        int menuItemId = menuItem.getItemId();
+    public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // 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);
 
-        switch (menuItemId) {
-            case R.id.home:
-                loadUrl(homepage);
-                break;
+        // Extract the strings from the edit texts.
+        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 
-            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 = "";
+        // Create a favorite icon byte array output stream.
+        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-                    navigatingHistory = true;
+        // 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);
 
-                    // Load the previous website in the history.
-                    mainWebView.goBack();
-                }
-                break;
+        // Convert the favorite icon byte array stream to a byte array.
+        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
-            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 = "";
+        // Display the new bookmark below the current items in the (0 indexed) list.
+        int newBookmarkDisplayOrder = bookmarksListView.getCount();
 
-                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-                    navigatingHistory = true;
+        // Create the bookmark.
+        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 
-                    // Load the next website in the history.
-                    mainWebView.goForward();
-                }
-                break;
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-            case R.id.history:
-                // Get the `WebBackForwardList`.
-                WebBackForwardList webBackForwardList = mainWebView.copyBackForwardList();
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-                // 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;
+        // Scroll to the new bookmark.
+        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+    }
 
-            case R.id.requests:
-                // Launch the requests activity.
-                Intent requestsIntent = new Intent(this, RequestsActivity.class);
-                startActivity(requestsIntent);
-                break;
+    @Override
+    public void onCreateBookmarkFolder(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // 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.downloads:
-                // Launch the system Download Manager.
-                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+        // Get new folder name string.
+        String folderNameString = createFolderNameEditText.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 folder icon bitmap.
+        Bitmap folderIconBitmap;
 
-                startActivity(downloadManagerIntent);
-                break;
+        // 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();
 
-            case R.id.domains:
-                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
-                reapplyDomainSettingsOnRestart = true;
-                currentDomainName = "";
+            // Convert the folder icon drawable to a bitmap drawable.
+            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                // Launch the domains activity.
-                Intent domainsIntent = new Intent(this, DomainsActivity.class);
-                startActivity(domainsIntent);
-                break;
+            // 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;
+        }
 
-            case R.id.settings:
-                // Set the flag to reapply app settings on restart when returning from Settings.
-                reapplyAppSettingsOnRestart = true;
+        // Create a folder icon byte array output stream.
+        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // Set the flag to reapply the domain settings on restart when returning from Settings.
-                reapplyDomainSettingsOnRestart = true;
-                currentDomainName = "";
+        // 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);
 
-                // Launch the settings activity.
-                Intent settingsIntent = new Intent(this, SettingsActivity.class);
-                startActivity(settingsIntent);
-                break;
+        // Convert the folder icon byte array stream to a byte array.
+        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 
-            case R.id.import_export:
-                // Launch the import/export activity.
-                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
-                startActivity(importExportIntent);
-                break;
+        // 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);
+        }
 
-            case R.id.guide:
-                // Launch `GuideActivity`.
-                Intent guideIntent = new Intent(this, GuideActivity.class);
-                startActivity(guideIntent);
-                break;
+        // Create the folder, which will be placed at the top of the `ListView`.
+        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
 
-            case R.id.about:
-                // Launch `AboutActivity`.
-                Intent aboutIntent = new Intent(this, AboutActivity.class);
-                startActivity(aboutIntent);
-                break;
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-            case R.id.clearAndExit:
-                // Close the bookmarks cursor and database.
-                bookmarksCursor.close();
-                bookmarksDatabaseHelper.close();
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-                // Get a handle for `sharedPreferences`.  `this` references the current context.
-                SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        // Scroll to the new folder.
+        bookmarksListView.setSelection(0);
+    }
 
-                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+    @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);
 
-                // 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();
-                    }
+        // Store the bookmark strings.
+        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 
-                    // 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.
-                    }
-                }
+        // 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();
 
-                // Clear DOM storage.
-                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
-                    // Ask `WebStorage` to clear the DOM storage.
-                    WebStorage webStorage = WebStorage.getInstance();
-                    webStorage.deleteAllData();
+            // 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);
 
-                    // 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 favorite icon byte array stream to a byte array.
+            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 
-                        // 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.
-                    }
-                }
+            //  Update the bookmark and the favorite icon.
+            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+        }
 
-                // 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();
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                    // 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.
-                    }
-                }
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
 
-                // Clear the cache.
-                if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
-                    // `true` includes disk files.
-                    mainWebView.clearCache(true);
+    @Override
+    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);
 
-                    // Manually delete the cache directories.
-                    try {
-                        // Delete the main cache directory.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+        // Get the new folder name.
+        String newFolderNameString = editFolderNameEditText.getText().toString();
 
-                        // 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.
-                    }
-                }
+        // 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;
 
-                // Clear SSL certificate preferences.
-                mainWebView.clearSslPreferences();
+            // Populate the new folder icon bitmap.
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable.
+                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 
-                // Clear the back/forward history.
-                mainWebView.clearHistory();
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                // Clear `formattedUrlString`.
-                formattedUrlString = null;
+                // 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 `customHeaders`.
-                customHeaders.clear();
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // Detach all views from `mainWebViewRelativeLayout`.
-                mainWebViewRelativeLayout.removeAllViews();
+            // 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);
 
-                // Destroy the internal state of `mainWebView`.
-                mainWebView.destroy();
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-                // 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.
-                    }
-                }
+            // 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();
 
-                // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    finishAndRemoveTask();
-                } else {
-                    finish();
-                }
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                // Remove the terminated program from RAM.  The status code is `0`.
-                System.exit(0);
-                break;
+                // Convert the folder icon bitmap drawable to a bitmap.
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {  // Use the `WebView` favorite icon.
+                // Copy the favorite icon bitmap to the folder icon bitmap.
+                folderIconBitmap = favoriteIconBitmap;
+            }
+
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
+
+            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
+
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+
+            // Update the folder name and icon in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
         }
 
-        // 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 `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
     }
 
     @Override
-    public void onPostCreate(Bundle savedInstanceState) {
-        super.onPostCreate(savedInstanceState);
+    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;
 
-        // Sync the state of the DrawerToggle after onRestoreInstanceState has finished.
-        drawerToggle.syncState();
+            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;
+        }
     }
 
     @Override
-    public void onConfigurationChanged(Configuration newConfig) {
-        super.onConfigurationChanged(newConfig);
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        // Get a handle for the fragment manager.
+        FragmentManager fragmentManager = getSupportFragmentManager();
 
-        // 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));
-        }
+        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);
 
-        // `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);
+                // 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));
+                }
+
+                // Reset the download variables.
+                downloadUrl = "";
+                downloadContentDisposition = "";
+                downloadContentLength = 0;
+                break;
+
+            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);
+
+                // 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));
+                }
+
+                // Reset the image URL variable.
+                downloadImageUrl = "";
+                break;
+        }
     }
 
     @Override
-    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
-        // Store the `HitTestResult`.
-        final WebView.HitTestResult hitTestResult = mainWebView.getHitTestResult();
+    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);
 
-        // Create strings.
-        final String imageUrl;
-        final String linkUrl;
+            // Parse `imageUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
 
-        // Get a handle for the `ClipboardManager`.
-        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+            // 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.getInstance().getCookie(imageUrl);
 
-        // Remove the lint errors below that `clipboardManager` might be `null`.
-        assert clipboardManager != null;
+                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
+                downloadRequest.addRequestHeader("Cookie", cookies);
+            }
 
-        switch (hitTestResult.getType()) {
-            // `SRC_ANCHOR_TYPE` is a link.
-            case WebView.HitTestResult.SRC_ANCHOR_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
+            // Get the file name from the dialog fragment.
+            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
+            String imageName = downloadImageNameEditText.getText().toString();
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+            // 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);
+            }
 
-                // Add a Load URL entry.
-                menu.add(R.string.load_url).setOnMenuItemClickListener((MenuItem item) -> {
-                    loadUrl(linkUrl);
-                    return false;
-                });
+            // Allow `MediaScanner` to index the download if it is a media file.
+            downloadRequest.allowScanningByMediaScanner();
 
-                // 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);
+            // Add the URL as the description for the download.
+            downloadRequest.setDescription(imageUrl);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
-                    return false;
-                });
+            // 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));
+
+            // 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.getInstance().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
+    public void onHttpAuthenticationCancel() {
+        // Cancel the `HttpAuthHandler`.
+        httpAuthHandler.cancel();
+    }
+
+    @Override
+    public void onHttpAuthenticationProceed(DialogFragment 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);
+
+        // Proceed with the HTTP authentication.
+        httpAuthHandler.proceed(usernameEditText.getText().toString(), passwordEditText.getText().toString());
+    }
+
+    @Override
+    public void onSslErrorCancel() {  // TODO.  How to handle this with multiple tabs?  There could be multiple errors at once.
+        sslErrorHandler.cancel();
+    }
+
+    @Override
+    public void onSslErrorProceed() {  // TODO.  How to handle this with multiple tabs?  There could be multiple errors at once.
+        sslErrorHandler.proceed();
+    }
+
+    @Override
+    public void onPinnedMismatchBack() {  // TODO.  Move this logic to the dialog.
+        if (currentWebView.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 = "";  // TODO.
+
+            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
+            navigatingHistory = true;  // TODO.
+
+            // Go back.
+            currentWebView.goBack();
+        } else {  // There are no pages to go back to.
+            // Load a blank page
+            loadUrl("");
+        }
+    }
+
+    @Override
+    public void onPinnedMismatchProceed() {  // TODO.  Move this logic to the dialog.
+        // Do not check the pinned information for this domain again until the domain changes.
+        currentWebView.setIgnorePinnedDomainInformation(true);
+    }
+
+    @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 = "";
+
+        // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
+        navigatingHistory = true;
+
+        // Load the history entry.
+        currentWebView.goBackOrForward(moveBackOrForwardSteps);
+    }
+
+    @Override
+    public void onClearHistory() {
+        // Clear the history.
+        currentWebView.clearHistory();
+    }
+
+    // Override `onBackPressed` to handle the navigation drawer and `mainWebView`.
+    @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 formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
+            formattedUrlString = "";
+
+            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
+            navigatingHistory = true;
+
+            // Go back.
+            currentWebView.goBack();
+        } else {  // There isn't anything to do in Privacy Browser.
+            // Pass `onBackPressed()` to the system.
+            super.onBackPressed();
+        }
+    }
+
+    // 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();
+
+        // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
+        if (unformattedUrlString.startsWith("content://")) {
+            // Load the entire content URL.
+            formattedUrlString = unformattedUrlString;
+        } else if (Patterns.WEB_URL.matcher(unformattedUrlString).matches() || unformattedUrlString.startsWith("http://") || unformattedUrlString.startsWith("https://")
+                || unformattedUrlString.startsWith("file://")) {
+            // 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 formattedUri = new Uri.Builder();
+            formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
+
+            // 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 = "";
+            }
+        } 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 = "";
+            }
+
+            // Add the base search URL.
+            formattedUrlString = 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(formattedUrlString);
+    }
+
+    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;
+
+        // 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);
+
+        // 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);
+
+        // 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);
+        downloadWithExternalApp = sharedPreferences.getBoolean("download_with_external_app", false);
+
+        // Get handles for the views that need to be modified.  `getSupportActionBar()` must be used until the minimum API >= 21.
+        FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+        ActionBar actionBar = getSupportActionBar();
+
+        // Remove the incorrect lint warnings 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");
+        }
+
+        // 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(sharedPreferences.getBoolean("scroll_app_bar", true));
+            }
+        }
+
+        // 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) {
+                actionBar.hide();
+            } else {
+                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 app 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 resetFavoriteIcon, boolean reloadWebsite) {
+        // Get a handle for the URL relative layout.
+        RelativeLayout urlRelativeLayout = findViewById(R.id.url_relativelayout);
+
+        // 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 (resetFavoriteIcon) {
+                // Initialize the favorite icon.
+                currentWebView.initializeFavoriteIcon();
+
+                // Get a handle for the tab layout.
+                TabLayout tabLayout = findViewById(R.id.tablayout);
+
+                // Get the current tab.
+                TabLayout.Tab currentTab = tabLayout.getTabAt(tabLayout.getSelectedTabPosition());  // TODO.  We need to get the tab for this WebView, which might not be the current tab.
+
+                // Remove the warning below that the current tab might be null.
+                assert currentTab != null;
+
+                // Get the current tab custom view.
+                View currentTabCustomView = currentTab.getCustomView();
+
+                // Remove the warning below that the current tab custom view might be null.
+                assert currentTabCustomView != null;
+
+                // Get the current tab favorite icon image view.
+                ImageView currentTabFavoriteIconImageView = currentTabCustomView.findViewById(R.id.favorite_icon_imageview);
+
+                // Set the default favorite icon as the favorite icon for this tab.
+                currentTabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(nestedScrollWebView.getFavoriteOrDefaultIcon(), 64, 64, true));
+            }
+
+            // Get a handle for the swipe refresh layout.
+            SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+
+            // 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);
+            nightMode = sharedPreferences.getBoolean("night_mode", false);  // TODO.
+            boolean displayWebpageImages = sharedPreferences.getBoolean("display_webpage_images", true);
+
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
+
+            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)));
+                boolean domainJavaScriptEnabled = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_JAVASCRIPT)) == 1);
+                firstPartyCookiesEnabled = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES)) == 1);  // TODO.
+                boolean domainThirdPartyCookiesEnabled = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES)) == 1);
+                boolean domainDomStorageEnabled = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)) == 1);
+                // Form data can be removed once the minimum API >= 26.
+                saveFormDataEnabled = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)) == 1);  // TODO.
+                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 `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;  // TODO.
+                        break;
+
+                    case DomainsDatabaseHelper.NIGHT_MODE_DISABLED:
+                        nightMode = false;  // TODO.
+                        break;
+                }
+
+                // TODO.
+                // Store the domain JavaScript status.  This is used by the options menu night mode toggle.
+                domainSettingsJavaScriptEnabled = domainJavaScriptEnabled;
+
+                // Enable JavaScript if night mode is enabled.
+                if (nightMode) {
+                    // Enable JavaScript.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(true);
+                } else {
+                    // Set JavaScript according to the domain settings.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(domainJavaScriptEnabled);
+                }
+
+                // Close `currentHostDomainSettingsCursor`.
+                currentDomainSettingsCursor.close();
+
+                // Apply the domain settings.
+                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);  //TODO  This could be bad.
+                nestedScrollWebView.getSettings().setDomStorageEnabled(domainDomStorageEnabled);  // TODO.  Move up.
+
+                // Apply the form data setting if the API < 26.
+                if (Build.VERSION.SDK_INT < 26) {
+                    nestedScrollWebView.getSettings().setSaveFormData(saveFormDataEnabled);
+                }
+
+                // 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);
+                }
 
-                // 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;
+                // Set third-party cookies status if API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, domainThirdPartyCookiesEnabled);
+                }
 
-                            // 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);
+                // 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);  // TODO Could this be local.
 
-                                // 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);
+                        // 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;
 
-                            // Show the download file alert dialog.
-                            downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
+                            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]);
                         }
                     }
-                    return false;
-                });
+                }
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+                // Set swipe to refresh.
+                switch (swipeToRefreshInt) {  // TODO.  This needs to be set and updated by tab.
+                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_SYSTEM_DEFAULT:
+                        // Set swipe to refresh according to the default.
+                        swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
+                        break;
 
-            case WebView.HitTestResult.EMAIL_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
+                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_ENABLED:
+                        // Enable swipe to refresh.
+                        swipeRefreshLayout.setEnabled(true);
+                        break;
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_DISABLED:
+                        // Disable swipe to refresh.
+                        swipeRefreshLayout.setEnabled(false);
+                }
 
-                // 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);
+                // Set the loading of webpage images.
+                switch (displayWebpageImagesInt) {
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
+                        break;
 
-                    // Parse the url and set it as the data for the `Intent`.
-                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(true);
+                        break;
 
-                    // `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);
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(false);
+                        break;
+                }
 
-                    // Make it so.
-                    startActivity(emailIntent);
-                    return false;
-                });
+                // 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);
+                firstPartyCookiesEnabled = sharedPreferences.getBoolean("first_party_cookies", false);  // TODO.
+                boolean defaultThirdPartyCookiesEnabled = sharedPreferences.getBoolean("third_party_cookies", false);
+                nestedScrollWebView.getSettings().setDomStorageEnabled(sharedPreferences.getBoolean("dom_storage", false));
+                saveFormDataEnabled = sharedPreferences.getBoolean("save_form_data", false);  // Form data can be removed once the minimum API >= 26.  // TODO.
+                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));
 
-                // 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);
+                // Enable JavaScript if night mode is enabled.
+                if (nightMode) {
+                    // Enable JavaScript.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(true);
+                } else {
+                    // Set JavaScript according to the domain settings.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(defaultJavaScriptEnabled);
+                }
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
-                    return false;
-                });
+                // Apply the default settings.
+                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);  // TODO.
+                nestedScrollWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
+                swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+                // Apply the form data setting if the API < 26.
+                if (Build.VERSION.SDK_INT < 26) {
+                    currentWebView.getSettings().setSaveFormData(saveFormDataEnabled);
+                }
 
-            // `IMAGE_TYPE` is an image.
-            case WebView.HitTestResult.IMAGE_TYPE:
-                // Get the image URL.
-                imageUrl = hitTestResult.getExtra();
+                // Reset the pinned variables.
+                nestedScrollWebView.setDomainSettingsDatabaseId(-1);
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+                // Set third-party cookies status if API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, defaultThirdPartyCookiesEnabled);
+                }
 
-                // Add a `View Image` entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+                // 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);
 
-                // 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;
+                    // 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 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));
+
+        // Get a handle for the action bar.  `getSupportActionBar()` must be used until the minimum API >= 21.
+        ActionBar actionBar = getSupportActionBar();
+
+        // Remove the incorrect lint warning later that the action bar might be null.
+        assert actionBar != null;
+
+        // Set the homepage, search, and proxy options.
+        if (proxyThroughOrbot) {  // Set the Tor options.
+            // Set `torHomepageString` as `homepage`.
+            homepage = torHomepageString;
+
+            // If formattedUrlString is null assign the homepage to it.
+            if (formattedUrlString == null) {
+                formattedUrlString = homepage;
+            }
+
+            // 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;
+            }
 
-                            // 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);
+            // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
+            OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
 
-                                // 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);
+            // Set the `appBar` background to indicate proxying through Orbot is enabled.  `this` refers to the context.
+            if (darkTheme) {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.dark_blue_30));
+            } else {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.blue_50));
+            }
 
-                            // Show the download image alert dialog.
-                            downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+            // Check to see if Orbot is ready.
+            if (!orbotStatus.equals("ON")) {  // Orbot is not ready.
+                // Set `waitingForOrbot`.
+                waitingForOrbot = 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);
+                // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
+                currentWebView.getSettings().setUseWideViewPort(false);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
-                    return false;
-                });
+                // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
+                currentWebView.loadData(waitingForOrbotHtmlString, "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 `homepageString` as `homepage`.
+            homepage = homepageString;
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
-        }
-    }
+            // If formattedUrlString is null assign the homepage to it.
+            if (formattedUrlString == null) {
+                formattedUrlString = homepage;
+            }
 
-    @Override
-    public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
-        // Get the `EditTexts` from the `dialogFragment`.
-        EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
-        EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
+            // Set the 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;
+            }
 
-        // Extract the strings from the `EditTexts`.
-        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
+            // Reset the proxy to default.  The host is `""` and the port is `"0"`.
+            OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
 
-        // 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();
+            // Set the default `appBar` background.  `this` refers to the context.
+            if (darkTheme) {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_900));
+            } else {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_100));
+            }
 
-        // Display the new bookmark below the current items in the (0 indexed) list.
-        int newBookmarkDisplayOrder = bookmarksListView.getCount();
+            // Reset `waitingForOrbot.
+            waitingForOrbot = false;
 
-        // Create the bookmark.
-        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
+            // 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);
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+                    // Get the fragment view.
+                    View fragmentView = webViewTabFragment.getView();
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+                    // 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);
 
-        // Scroll to the new bookmark.
-        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+                        // Reload the WebView.
+                        nestedScrollWebView.reload();
+                    }
+                }
+            }
+        }
     }
 
-    @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 updatePrivacyIcons(boolean runInvalidateOptionsMenu) {
+        // Only update the privacy icons if the options menu has already been populated.
+        if (optionsMenu != null) {
+            // 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 (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);
+            }
 
-        // Get new folder name string.
-        String folderNameString = createFolderNameEditText.getText().toString();
+            // 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);
+                }
+            }
 
-        // 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;
-        }
+            // 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);
+                }
+            }
 
-        // 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();
+            // Update the refresh icon.
+            if (darkTheme) {
+                refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
+            } else {
+                refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
+            }
 
-        // 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);
+            // `invalidateOptionsMenu` calls `onPrepareOptionsMenu()` and redraws the icons in the `AppBar`.
+            if (runInvalidateOptionsMenu) {
+                invalidateOptionsMenu();
+            }
         }
+    }
 
-        // Create the folder, which will be placed at the top of the `ListView`.
-        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
+    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();
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+        // Set the URI and the MIME type.  Specifying `text/html` displays a good number of options.
+        downloadIntent.setDataAndType(Uri.parse(url), "text/html");
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+        // Flag the intent to open in a new task.
+        downloadIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-        // Scroll to the new folder.
-        bookmarksListView.setSelection(0);
+        // Show the chooser.
+        startActivity(Intent.createChooser(downloadIntent, getString(R.string.open_with)));
     }
 
-    @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();
+    private void highlightUrlText() {
+        // Get a handle for the URL edit text.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
-        // Convert the favorite icon bitmap to an `Icon`.  `IconCompat` is required until API >= 26.
-        IconCompat favoriteIcon = IconCompat.createWithBitmap(favoriteIconBitmap);
+        // Only highlight the URL text if the box is not currently selected.
+        if (!urlEditText.hasFocus()) {
+            // Get the URL string.
+            String urlString = urlEditText.getText().toString();
 
-        // Setup the shortcut intent.
-        Intent shortcutIntent = new Intent(Intent.ACTION_VIEW);
-        shortcutIntent.setData(Uri.parse(formattedUrlString));
+            // 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;
+                }
 
-        // Create a shortcut info builder.  The shortcut name becomes the shortcut ID.
-        ShortcutInfoCompat.Builder shortcutInfoBuilder = new ShortcutInfoCompat.Builder(this, shortcutNameString);
+                // Get the index of the last `.` in the domain.
+                int lastDotIndex = baseUrl.lastIndexOf(".");
 
-        // Add the required fields to the shortcut info builder.
-        shortcutInfoBuilder.setIcon(favoriteIcon);
-        shortcutInfoBuilder.setIntent(shortcutIntent);
-        shortcutInfoBuilder.setShortLabel(shortcutNameString);
+                // Get the index of the penultimate `.` in the domain.
+                int penultimateDotIndex = baseUrl.lastIndexOf(".", lastDotIndex - 1);
 
-        // Request the pin.  `ShortcutManagerCompat` can be switched to `ShortcutManager` once API >= 26.
-        ShortcutManagerCompat.requestPinShortcut(this, shortcutInfoBuilder.build(), null);
-    }
+                // 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);
 
-    @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;
+                    // 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);
+                    }
+                }
 
-            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;
+                // 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 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);
+    private void loadBookmarksFolder() {
+        // Update the bookmarks cursor with the contents of the bookmarks database for the current folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // 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));
-                }
+        // 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);
+            }
 
-                // Reset the download variables.
-                downloadUrl = "";
-                downloadContentDisposition = "";
-                downloadContentLength = 0;
-                break;
+            @Override
+            public void bindView(View view, Context context, Cursor cursor) {
+                // Get handles for the views.
+                ImageView bookmarkFavoriteIcon = view.findViewById(R.id.bookmark_favorite_icon);
+                TextView bookmarkNameTextView = view.findViewById(R.id.bookmark_name);
 
-            case 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);
+                // Get the favorite icon byte array from the cursor.
+                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
 
-                // 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));
-                }
+                // 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);
 
-                // Reset the image URL variable.
-                downloadImageUrl = "";
-                break;
-        }
-    }
+                // Display the bitmap in `bookmarkFavoriteIcon`.
+                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 
-    @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);
+                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
+                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+                bookmarkNameTextView.setText(bookmarkNameString);
 
-            // Parse `imageUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
+                // 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);
+                }
+            }
+        };
 
-            // 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);
+        // Populate the `ListView` with the adapter.
+        bookmarksListView.setAdapter(bookmarksCursorAdapter);
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
-            }
+        // Set the bookmarks drawer title.
+        if (currentBookmarksFolder.isEmpty()) {
+            bookmarksTitleTextView.setText(R.string.bookmarks);
+        } else {
+            bookmarksTitleTextView.setText(currentBookmarksFolder);
+        }
+    }
 
-            // Get the file name from the dialog fragment.
-            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
-            String imageName = downloadImageNameEditText.getText().toString();
+    private void openWithApp(String url) {
+        // Create the open with intent with `ACTION_VIEW`.
+        Intent openWithAppIntent = new Intent(Intent.ACTION_VIEW);
 
-            // 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);
-            }
+        // Set the URI but not the MIME type.  This should open all available apps.
+        openWithAppIntent.setData(Uri.parse(url));
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+        // Flag the intent to open in a new task.
+        openWithAppIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+        // Show the chooser.
+        startActivity(openWithAppIntent);
+    }
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(imageUrl);
+    private void openWithBrowser(String url) {
+        // Create the open with intent with `ACTION_VIEW`.
+        Intent openWithBrowserIntent = new Intent(Intent.ACTION_VIEW);
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+        // Set the URI and the MIME type.  `"text/html"` should load browser options.
+        openWithBrowserIntent.setDataAndType(Uri.parse(url), "text/html");
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+        // Flag the intent to open in a new task.
+        openWithBrowserIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            // 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();
-        }
+        // Show the chooser.
+        startActivity(openWithBrowserIntent);
     }
 
-    @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);
+    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);
 
-            // Parse `downloadUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
+        // 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();
 
-            // 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);
+        // Add a new tab.
+        tabLayout.addTab(tabLayout.newTab());
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
-            }
+        // Get the new tab.
+        TabLayout.Tab newTab = tabLayout.getTabAt(newTabNumber);
 
-            // Get the file name from the dialog fragment.
-            EditText downloadFileNameEditText = dialogFragment.getDialog().findViewById(R.id.download_file_name);
-            String fileName = downloadFileNameEditText.getText().toString();
+        // Remove the lint warning below that the current tab might be null.
+        assert newTab != null;
 
-            // 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);
-            }
+        // Set a custom view on the new tab.
+        newTab.setCustomView(R.layout.custom_tab_view);
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+        // Add the new WebView page.
+        webViewPagerAdapter.addPage(newTabNumber, webViewPager);
+    }
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(downloadUrl);
+    private void setCurrentWebView(int pageNumber) {
+        // Get handles for the URL views.
+        RelativeLayout urlRelativeLayout = findViewById(R.id.url_relativelayout);
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+        // Get the WebView tab fragment.
+        WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(pageNumber);
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+        // Get the fragment view.
+        View fragmentView = webViewTabFragment.getView();
 
-            // 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();
-        }
-    }
+        // Remove the incorrect lint warning below that the fragment view might be null.
+        assert fragmentView != null;
 
-    @Override
-    public void onSaveBookmark(AppCompatDialogFragment dialogFragment, int selectedBookmarkDatabaseId) {
-        // Get handles for the views from `dialogFragment`.
-        EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
-        EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
-        RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
+        // Store the current WebView.
+        currentWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-        // Store the bookmark strings.
-        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
+        // Update the privacy icons.  `true` redraws the icons in the app bar.
+        updatePrivacyIcons(true);
 
-        // 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();
+        // Store the current formatted URL string.
+        formattedUrlString = currentWebView.getUrl();
 
-            //  Update the bookmark and the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
-        }
+        // Clear the focus from the URL text box.
+        urlEditText.clearFocus();
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+        // Hide the soft keyboard.
+        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+        // Display the current URL in the URL text box.
+        urlEditText.setText(formattedUrlString);
+
+        // Highlight the URL text.
+        highlightUrlText();
+
+        // 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 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);
+    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();
+        EditText urlEditText = findViewById(R.id.url_edittext);
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+
+        // Remove the incorrect lint warnings below that the some of the views might be null.
+        assert actionBar != null;
+
+        // Get a handle for the activity
+        Activity activity = this;
 
-        // Get the new folder name.
-        String newFolderNameString = editFolderNameEditText.getText().toString();
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // 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;
-            }
+        // Get the relevant preferences.
+        boolean downloadWithExternalApp = sharedPreferences.getBoolean("download_with_external_app", false);
 
-            // 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();
+        // Initialize the favorite icon.
+        nestedScrollWebView.initializeFavoriteIcon();
 
-            // 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;
-            }
+        // Set the app bar scrolling.
+        nestedScrollWebView.setNestedScrollingEnabled(sharedPreferences.getBoolean("scroll_app_bar", true));
+
+        // 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 name and icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
+        // 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);
         }
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+        // 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 `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+        // Set the WebView to load in overview mode (zoomed out to the maximum width).
+        nestedScrollWebView.getSettings().setLoadWithOverviewMode(true);
 
-    @Override
-    public void onHttpAuthenticationCancel() {
-        // Cancel the `HttpAuthHandler`.
-        httpAuthHandler.cancel();
-    }
+        // Explicitly disable geolocation.
+        nestedScrollWebView.getSettings().setGeolocationEnabled(false);
 
-    @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);
+        // 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;
 
-        // Proceed with the HTTP authentication.
-        httpAuthHandler.proceed(usernameEditText.getText().toString(), passwordEditText.getText().toString());
-    }
+                    // Toggle the full screen browsing mode.
+                    if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
+                        // Hide the app bar if specified.
+                        if (hideAppBar) {
+                            actionBar.hide();
+                        }
 
-    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 banner ad in the free flavor.
+                        if (BuildConfig.FLAVOR.contentEquals("free")) {
+                            AdHelper.hideAd(findViewById(R.id.adview));
+                        }
 
-    @Override
-    public void onSslErrorCancel() {
-        sslErrorHandler.cancel();
-    }
+                        // 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);
 
-    @Override
-    public void onSslErrorProceed() {
-        sslErrorHandler.proceed();
-    }
+                        /* Hide the system bars.
+                         * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                         * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                         * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                         * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                         */
+                        rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                                View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+                    } else {  // Switch to normal viewing mode.
+                        // Show the app bar.
+                        actionBar.show();
 
-    @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 = "";
+                        // 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));
+                        }
 
-            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-            navigatingHistory = true;
+                        // Remove the `SYSTEM_UI` flags from the root frame layout.
+                        rootFrameLayout.setSystemUiVisibility(0);
 
-            // Go back.
-            mainWebView.goBack();
-        } else {  // There are no pages to go back to.
-            // Load a blank page
-            loadUrl("");
-        }
-    }
+                        // Add the translucent status flag.
+                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                    }
 
-    @Override
-    public void onSslMismatchProceed() {
-        // Do not check the pinned SSL certificate for this domain again until the domain changes.
-        ignorePinnedSslCertificate = true;
-    }
+                    // Consume the double-tap.
+                    return true;
+                } else { // Do not consume the double-tap because full screen browsing mode is disabled.
+                    return false;
+                }
+            }
+        });
 
-    @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 = "";
+        // 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();
 
-        // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-        navigatingHistory = true;
+            // Send the event to the gesture detector.
+            return doubleTapGestureDetector.onTouchEvent(event);
+        });
 
-        // Load the history entry.
-        mainWebView.goBackOrForward(moveBackOrForwardSteps);
-    }
+        // Register the WebView for a context menu.  This is used to see link targets and download images.
+        registerForContextMenu(nestedScrollWebView);
 
-    @Override
-    public void onClearHistory() {
-        // Clear the history.
-        mainWebView.clearHistory();
-    }
+        // 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();
 
-    // 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);
+                // Set the URI and the MIME type.  Specifying `text/html` displays a good number of options.
+                downloadIntent.setDataAndType(Uri.parse(url), "text/html");
 
-                // Load the new folder.
-                loadBookmarksFolder();
-            }
+                // Flag the intent to open in a new task.
+                downloadIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-        } 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 = "";
+                // 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.
 
-            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-            navigatingHistory = true;
+                    // Store the variables for future use by `onRequestPermissionsResult()`.
+                    downloadUrl = url;
+                    downloadContentDisposition = contentDisposition;
+                    downloadContentLength = contentLength;
 
-            // Go back.
-            mainWebView.goBack();
-        } else {  // There isn't anything to do in Privacy Browser.
-            // Pass `onBackPressed()` to the system.
-            super.onBackPressed();
-        }
-    }
+                    // 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);
 
-    // 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 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);
+
+                    // Show the download file alert dialog.
+                    downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
+                }
+            }
+        });
 
-    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();
+        // 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);
 
-        // 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;
-            }
+            @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;
 
-            // Initialize `unformattedUrl`.
-            URL unformattedUrl = null;
+                    // Build the match string.
+                    String matchString = activeMatch + "/" + numberOfMatches;
 
-            // 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();
+                    // Set `findOnPageCountTextView`.
+                    findOnPageCountTextView.setText(matchString);
+                }
             }
+        });
 
-            // 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;
+        // 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 (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.
+                    // `::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);
+                            }
+                        };
 
-            // Build the URI.
-            Uri.Builder formattedUri = new Uri.Builder();
-            formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
+                        // Displaying of `mainWebView` after 500 milliseconds.
+                        displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
+                    });
+                }
 
-            // 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 = "";
-            }
-        } 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;
+                // Update the progress bar.
+                progressBar.setProgress(progress);
 
-            // Sanitize the search input.
-            try {
-                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
-            }
+                // 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);
 
-            // Add the base search URL.
-            formattedUrlString = searchURL + encodedUrlString;
-        }
+                    // 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) {
+                        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();
+                    //Stop the swipe to refresh indicator if it is running
+                    swipeRefreshLayout.setRefreshing(false);
+                }
+            }
 
-        // Make it so.
-        loadUrl(formattedUrlString);
-    }
+            // 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);
 
-    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;
+                    // Get the current page position.
+                    int currentPosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-        // Apply the domain settings.
-        applyDomainSettings(url, true, false);
+                    // Get the current tab.
+                    TabLayout.Tab tab = tabLayout.getTabAt(currentPosition);
 
-        // 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("");
+                    // Remove the lint warning below that the current tab might be null.
+                    assert tab != null;
 
-        // Load the URL.
-        mainWebView.loadUrl(url, customHeaders);
-    }
+                    // Get the custom view from the tab.
+                    View tabView = tab.getCustomView();
 
-    public void findPreviousOnPage(View view) {
-        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
-        mainWebView.findNext(false);
-    }
+                    // Remove the incorrect warning below that the current tab view might be null.
+                    assert tabView != null;
 
-    public void findNextOnPage(View view) {
-        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
-        mainWebView.findNext(true);
-    }
+                    // Get the favorite icon image view from the tab.
+                    ImageView tabFavoriteIconImageView = tabView.findViewById(R.id.favorite_icon_imageview);
 
-    public void closeFindOnPage(View view) {
-        // Delete the contents of `find_on_page_edittext`.
-        findOnPageEditText.setText(null);
+                    // Display the favorite icon in the tab.
+                    tabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
+                }
+            }
 
-        // Clear the highlighted phrases.
-        mainWebView.clearMatches();
+            // 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());
 
-        // Hide the Find on Page `RelativeLayout`.
-        findOnPageLinearLayout.setVisibility(View.GONE);
+                // Get the current tab.
+                TabLayout.Tab tab = tabLayout.getTabAt(currentPosition);
 
-        // Show the URL app bar.
-        supportAppBar.setVisibility(View.VISIBLE);
+                // 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();
 
-        // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
-        inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
-    }
+                    // Remove the incorrect warning below that the current tab view might be null.
+                    assert tabView != null;
 
-    private void applyAppSettings() {
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                    // Get the title text view from the tab.
+                    TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
 
-        // 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);
+                    // Set the title as the tab text.
+                    tabTitleTextView.setText(title);
+                }
+            }
 
-        // Apply the proxy through Orbot settings.
-        applyProxyThroughOrbot(false);
+            // 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);
 
-        // Set Do Not Track status.
-        if (doNotTrackEnabled) {
-            customHeaders.put("DNT", "1");
-        } else {
-            customHeaders.remove("DNT");
-        }
+                // Set the full screen video flag.
+                displayingFullScreenVideo = true;
 
-        // 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);
+                // 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));
+                }
 
-                // Remove the translucent status bar overlay.
-                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                // 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);
-
-                // Add the translucent status flag if it is unset.
-                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                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);
 
-                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;
+                // Disable the sliding drawers.
+                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 
-            // Show the `appBar` if `findOnPageLinearLayout` is not visible.
-            if (findOnPageLinearLayout.getVisibility() == View.GONE) {
-                appBar.show();
-            }
+                // Add the video view to the full screen video frame layout.
+                fullScreenVideoFrameLayout.addView(video);
 
-            // 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));
+                // Show the full screen video frame layout.
+                fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
             }
 
-            // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-            rootCoordinatorLayout.setSystemUiVisibility(0);
-
-            // Remove the translucent navigation bar flag if it is set.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+            // 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);
 
-            // 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);
+                // Unset the full screen video flag.
+                displayingFullScreenVideo = false;
 
-            // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-            rootCoordinatorLayout.setFitsSystemWindows(true);
-        }
-    }
+                // Remove all the views from the full screen video frame layout.
+                fullScreenVideoFrameLayout.removeAllViews();
 
-    // `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();
+                // Hide the full screen video frame layout.
+                fullScreenVideoFrameLayout.setVisibility(View.GONE);
 
-        // Initialize a variable to track if the user agent changes.
-        boolean userAgentChanged = false;
+                // Enable the sliding drawers.
+                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 
-        // Parse the URL into a URI.
-        Uri uri = Uri.parse(url);
+                // Show the main content relative layout.
+                mainContentRelativeLayout.setVisibility(View.VISIBLE);
 
-        // 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);
-        }
+                // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
+                if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
+                    // Hide the app bar if specified.
+                    if (hideAppBar) {
+                        actionBar.hide();
+                    }
 
-        // Strings don't like to be null.
-        if (hostName == null) {
-            hostName = "";
-        }
+                    // Hide the banner ad in the free flavor.
+                    if (BuildConfig.FLAVOR.contentEquals("free")) {
+                        AdHelper.hideAd(findViewById(R.id.adview));
+                    }
 
-        // 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;
+                    // 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);
 
-            // Reset `ignorePinnedSslCertificate`.
-            ignorePinnedSslCertificate = false;
+                    // Add the translucent status flag.
+                    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                }
 
-            // Reset the favorite icon if specified.
-            if (resetFavoriteIcon) {
-                favoriteIconBitmap = favoriteIconDefaultBitmap;
-                favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(favoriteIconBitmap, 64, 64, true));
+                // 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));
+                }
             }
 
-            // 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);
+            // 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;
 
-            // Populate `domainSettingsSet`.
-            for (int i = 0; i < domainNameCursor.getCount(); i++) {
-                // Move `domainsCursor` to the current row.
-                domainNameCursor.moveToPosition(i);
+                    // Create an intent to open a chooser based ont the file chooser parameters.
+                    Intent fileChooserIntent = fileChooserParams.createIntent();
 
-                // Store the domain name in `domainSettingsSet`.
-                domainSettingsSet.add(domainNameCursor.getString(domainNameColumnIndex));
+                    // 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;
             }
+        });
 
-            // Close `domainNameCursor.
-            domainNameCursor.close();
+        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.
+            @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 = "";
 
-            // Initialize variables to track if domain settings will be applied and, if so, under which name.
-            domainSettingsApplied = false;
-            String domainNameInDatabase = null;
+                    // Apply the domain settings for the new URL.  `applyDomainSettings` doesn't do anything if the domain has not changed.
+                    boolean userAgentChanged = applyDomainSettings(nestedScrollWebView, url, true, false);
 
-            // Check the hostname.
-            if (domainSettingsSet.contains(hostName)) {
-                domainSettingsApplied = true;
-                domainNameInDatabase = 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);
 
-            // 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;
+                        // 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);
+
+                    // Parse the url and set it as the data for the intent.
+                    emailIntent.setData(Uri.parse(url));
 
-                    // Store the applied domain names as it appears in the database.
-                    domainNameInDatabase = "*." + hostName;
-                }
+                    // Open the email program in a new task instead of as part of Privacy Browser.
+                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-                // Strip out the lowest subdomain of of the host name.
-                hostName = hostName.substring(hostName.indexOf(".") + 1);
-            }
+                    // Make it so.
+                    startActivity(emailIntent);
 
+                    // 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);
 
-            // Get a handle for the shared preference.
-            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                    // Add the phone number to the intent.
+                    dialIntent.setData(Uri.parse(url));
 
-            // 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);
+                    // Open the dialer in a new task instead of as part of Privacy Browser.
+                    dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            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();
+                    // Make it so.
+                    startActivity(dialIntent);
 
-                // 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));
+                    // 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 `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;
+                    // Add the URL to the intent.
+                    genericIntent.setData(Uri.parse(url));
 
-                    case DomainsDatabaseHelper.NIGHT_MODE_DISABLED:
-                        nightMode = false;
-                        break;
-                }
+                    // List all apps that can handle the URL instead of just opening the first one.
+                    genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
 
-                // Store the domain JavaScript status.  This is used by the options menu night mode toggle.
-                domainSettingsJavaScriptEnabled = javaScriptEnabled;
+                    // Open the app in a new task instead of as part of Privacy Browser.
+                    genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-                // Enable JavaScript if night mode is enabled.
-                if (nightMode) {
-                    javaScriptEnabled = 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();
+                    }
 
-                // 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)));
+                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
+                    return true;
                 }
+            }
 
-                // 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)));
-                }
+            // 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) {
+                // Get a handle for the navigation view.
+                NavigationView navigationView = findViewById(R.id.navigationview);
 
-                // Close `currentHostDomainSettingsCursor`.
-                currentHostDomainSettingsCursor.close();
+                // Get a handle for the navigation menu.
+                Menu navigationMenu = navigationView.getMenu();
 
-                // Apply the domain settings.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
+                // Get a handle for the navigation requests menu item.  The menu is 0 based.
+                MenuItem navigationRequestsMenuItem = navigationMenu.getItem(6);
 
-                // Apply the form data setting if the API < 26.
-                if (Build.VERSION.SDK_INT < 26) {
-                    mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
-                }
+                // 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()));
 
-                // 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);
-                }
+                // Reset the whitelist results tracker.
+                String[] whitelistResultStringArray = null;
 
-                // Set third-party cookies status if API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
-                }
+                // Initialize the third party request tracker.
+                boolean isThirdPartyRequest = false;
 
-                // 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);
+                // Initialize the current domain string.
+                String currentDomain = "";
 
-                        // 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;
+                // 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);
 
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                mainWebView.getSettings().setUserAgentString("");
-                                break;
+                    // Get the domain host names.
+                    String currentBaseDomain = currentDomainUri.getHost();
+                    String requestBaseDomain = requestDomainUri.getHost();
 
-                            case SETTINGS_CUSTOM_USER_AGENT:
-                                // Set the custom user agent.
-                                mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
-                                break;
+                    // Update the current domain variable.
+                    currentDomain = currentBaseDomain;
 
-                            default:
-                                // Get the user agent string from the user agent data array
-                                mainWebView.getSettings().setUserAgentString(userAgentDataArray[defaultUserAgentArrayPosition]);
+                    // 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);
                         }
-                    } 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.
-                                mainWebView.getSettings().setUserAgentString(userAgentName);
-                                break;
-
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                mainWebView.getSettings().setUserAgentString("");
-                                break;
 
-                            default:
-                                // Get the user agent string from the user agent data array.
-                                mainWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                        // 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);
                         }
+
+                        // Update the third party request tracker.
+                        isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
                     }
+                }
 
-                    // Store the applied user agent string, which is used in the View Source activity.
-                    appliedUserAgentString = mainWebView.getSettings().getUserAgentString();
+                // Get the current WebView page position.
+                int webViewPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-                    // Update the user agent change tracker.
-                    userAgentChanged = !appliedUserAgentString.equals(initialUserAgent);
-                }
+                // Determine if the WebView is currently displayed.
+                boolean webViewDisplayed = (webViewPagePosition == tabLayout.getSelectedTabPosition());
 
-                // 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;
+                // 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 DomainsDatabaseHelper.SWIPE_TO_REFRESH_ENABLED:
-                        // Enable swipe to refresh.
-                        swipeRefreshLayout.setEnabled(true);
-                        break;
+                    // Increment the blocked requests counters.
+                    nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                    nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS);
 
-                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_DISABLED:
-                        // Disable swipe to refresh.
-                        swipeRefreshLayout.setEnabled(false);
+                    // 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));
+                            blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                            blockAllThirdPartyRequestsMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " +
+                                    getString(R.string.block_all_third_party_requests));
+                        });
+                    }
+
+                    // Return an empty web resource response.
+                    return emptyWebResourceResponse;
                 }
 
-                // Set the loading of webpage images.
-                switch (displayWebpageImagesInt) {
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
-                        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 DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(true);
-                        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]});
 
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(false);
-                        break;
-                }
+                        // 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));
+                                blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                ultraPrivacyMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.ULTRA_PRIVACY) + " - " + getString(R.string.ultraprivacy));
+                            });
+                        }
 
-                // 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 (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]});
+
+                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
+                        return null;
+                    }
                 }
 
-                // 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 EasyList if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST)) {
+                    // Check the URL against EasyList.
+                    String[] easyListResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyList);
 
-                // Apply the form data setting if the API < 26.
-                if (Build.VERSION.SDK_INT < 26) {
-                    mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
-                }
+                    // 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]});
 
-                // 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_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));
+                                blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                easyListMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASY_LIST) + " - " + getString(R.string.easylist));
+                            });
+                        }
 
-                // 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 (easyListResults[0].equals(BlockListHelper.REQUEST_ALLOWED)) {  // The resource request matched EasyList's whitelist.
+                        // Update the whitelist result string array tracker.
+                        whitelistResultStringArray = new String[] {easyListResults[0], easyListResults[1], easyListResults[2], easyListResults[3], easyListResults[4], easyListResults[5]};
+                    }
                 }
 
-                // Only 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 EasyPrivacy if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY)) {
+                    // Check the URL against EasyPrivacy.
+                    String[] easyPrivacyResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyPrivacy);
 
-                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                            // Set the user agent to `""`, which uses the default value.
-                            mainWebView.getSettings().setUserAgentString("");
-                            break;
+                    // 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]});
 
-                        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.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));
+                                blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                easyPrivacyMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASY_PRIVACY) + " - " + getString(R.string.easyprivacy));
+                            });
+                        }
 
-                        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 (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]};
                     }
+                }
 
-                    // Store the applied user agent string, which is used in the View Source activity.
-                    appliedUserAgentString = mainWebView.getSettings().getUserAgentString();
+                // 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);
 
-                    // Update the user agent change tracker.
-                    userAgentChanged = !appliedUserAgentString.equals(initialUserAgent);
-                }
+                    // 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]});
 
-                // Set the loading of webpage images.
-                mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
+                        // 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));
+                                blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                fanboysAnnoyanceListMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " +
+                                        getString(R.string.fanboys_annoyance_list));
+                            });
+                        }
 
-                // 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 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);
 
-            // Close the domains database helper.
-            domainsDatabaseHelper.close();
+                    // 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]});
 
-            // Update the privacy icons, but only if `mainMenu` has already been populated.
-            if (mainMenu != null) {
-                updatePrivacyIcons(true);
-            }
-        }
+                        // 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));
+                                blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                fanboysSocialBlockingListMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " +
+                                        getString(R.string.fanboys_social_blocking_list));
+                            });
+                        }
 
-        // Reload the website if returning from the Domains activity.
-        if (reloadWebsite) {
-            mainWebView.reload();
-        }
+                        // 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]};
+                    }
+                }
+
+                // 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});
+                }
+
+                // The resource request has not been blocked.  `return null` loads the requested resource.
+                return null;
+            }
 
-        // Return the user agent changed status.
-        return userAgentChanged;
-    }
+            // 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;
 
-    private void applyProxyThroughOrbot(boolean reloadWebsite) {
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // Display the HTTP authentication dialog.
+                DialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
+                httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
+            }
 
-        // 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));
+            @Override
+            public void onPageStarted(WebView view, String url, Bitmap favicon) {
+                // Reset the list of resource requests.
+                nestedScrollWebView.clearResourceRequests();
 
-        // Set the homepage, search, and proxy options.
-        if (proxyThroughOrbot) {  // Set the Tor options.
-            // Set `torHomepageString` as `homepage`.
-            homepage = torHomepageString;
+                // Reset the requests counters.
+                nestedScrollWebView.resetRequestsCounters();
 
-            // If formattedUrlString is null assign the homepage to it.
-            if (formattedUrlString == null) {
-                formattedUrlString = homepage;
-            }
+                // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
+                if (nightMode) {
+                    nestedScrollWebView.setVisibility(View.INVISIBLE);
+                }
 
-            // 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;
-            }
+                // Hide the keyboard.
+                inputMethodManager.hideSoftInputFromWindow(nestedScrollWebView.getWindowToken(), 0);
 
-            // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
+                // Check to see if Privacy Browser is waiting on Orbot.
+                if (!waitingForOrbot) {  // Process the URL.
+                    // The formatted URL string must be updated at the beginning of the load, so that if the user toggles JavaScript during the load the new website is reloaded.
+                    formattedUrlString = url;
 
-            // 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));
-            }
+                    // Display the formatted URL text.
+                    urlEditText.setText(formattedUrlString);
 
-            // Check to see if Orbot is ready.
-            if (!orbotStatus.equals("ON")) {  // Orbot is not ready.
-                // Set `waitingForOrbot`.
-                waitingForOrbot = true;
+                    // Apply text highlighting to `urlTextBox`.
+                    highlightUrlText();
 
-                // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
-                mainWebView.getSettings().setUseWideViewPort(false);
+                    // Get a URI for the current URL.
+                    Uri currentUri = Uri.parse(formattedUrlString);
 
-                // 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;
+                    // Reset the list of host IP addresses.
+                    nestedScrollWebView.clearCurrentIpAddresses();
 
-            // If formattedUrlString is null assign the homepage to it.
-            if (formattedUrlString == null) {
-                formattedUrlString = homepage;
-            }
+                    // Get the IP addresses for the host.
+                    new GetHostIpAddresses(activity, getSupportFragmentManager(), nestedScrollWebView).execute(currentUri.getHost());
 
-            // 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;
-            }
+                    // Apply any custom domain settings if the URL was loaded by navigating history.
+                    if (navigatingHistory) {
+                        // Apply the domain settings.
+                        boolean userAgentChanged = applyDomainSettings(nestedScrollWebView, url, true, false);
 
-            // Reset the proxy to default.  The host is `""` and the port is `"0"`.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
+                        // Reset `navigatingHistory`.
+                        navigatingHistory = false;
 
-            // 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));
-            }
+                        // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
+                        if (userAgentChanged) {
+                            loadUrl(formattedUrlString);
+                        }
+                    }
 
-            // Reset `waitingForOrbot.
-            waitingForOrbot = false;
+                    // 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);
 
-            // Reload the website if requested.
-            if (reloadWebsite) {
-                mainWebView.reload();
+                        // 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 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);
-        }
+            // 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) {
+                    // Only use a wide view port if the URL starts with `http`, not for `file://` and `content://`.
+                    nestedScrollWebView.getSettings().setUseWideViewPort(url.startsWith("http"));
+                }
 
-        // 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);
-            }
-        }
+                // 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.getInstance().flush();
+                }
 
-        // 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);
-            }
-        }
+                // Update the Refresh menu item if it has been created.
+                if (refreshMenuItem != null) {
+                    // Reset the Refresh title.
+                    refreshMenuItem.setTitle(R.string.refresh);
 
-        // Update the refresh icon.
-        if (darkTheme) {
-            refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
-        } else {
-            refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
-        }
+                    // 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);
+                        }
+                    }
+                }
 
-        // `invalidateOptionsMenu` calls `onPrepareOptionsMenu()` and redraws the icons in the `AppBar`.
-        if (runInvalidateOptionsMenu) {
-            invalidateOptionsMenu();
-        }
-    }
 
-    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();
+                // Clear the cache and history if Incognito Mode is enabled.
+                if (incognitoModeEnabled) {
+                    // Clear the cache.  `true` includes disk files.
+                    nestedScrollWebView.clearCache(true);
 
-        // Set the URI and the mime type.  `"*/*"` will display the maximum number of options.
-        downloadIntent.setDataAndType(Uri.parse(url), "text/html");
+                    // Clear the back/forward history.
+                    nestedScrollWebView.clearHistory();
 
-        // Flag the intent to open in a new task.
-        downloadIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                    // Manually delete cache folders.
+                    try {
+                        // Delete the main cache directory.
+                        Runtime.getRuntime().exec("rm -rf " + privateDataDirectoryString + "/cache");
 
-        // Show the chooser.
-        startActivity(Intent.createChooser(downloadIntent, getString(R.string.open_with)));
-    }
+                        // 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.
+                    }
+                }
 
-    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;
-        }
+                // Update the URL text box 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 = "";
 
-        // Get the index of the last `.` in the domain.
-        int lastDotIndex = baseUrl.lastIndexOf(".");
+                        urlEditText.setText(formattedUrlString);
 
-        // Get the index of the penultimate `.` in the domain.
-        int penultimateDotIndex = baseUrl.lastIndexOf(".", lastDotIndex - 1);
+                        // Request focus for `urlTextBox`.
+                        urlEditText.requestFocus();
 
-        // 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);
+                        // Display the keyboard.
+                        inputMethodManager.showSoftInput(urlEditText, 0);
 
-            // 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);
-            }
-        }
+                        // Apply the domain settings.  This clears any settings from the previous domain.
+                        applyDomainSettings(nestedScrollWebView, formattedUrlString, true, false);
+                    } else {  // `WebView` has loaded a webpage.
+                        // Set the formatted URL string.  Getting the URL from the WebView instead of using the one provided by `onPageFinished` makes websites like YouTube function correctly.
+                        formattedUrlString = nestedScrollWebView.getUrl();
 
-        // De-emphasize the text after the domain name.
-        if (endOfDomainName > 0) {
-            urlTextBox.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
-        }
-    }
+                        // Only update the URL text box if the user is not typing in it.
+                        if (!urlEditText.hasFocus()) {
+                            // Display the formatted URL text.
+                            urlEditText.setText(formattedUrlString);
 
-    private void loadBookmarksFolder() {
-        // Update the bookmarks cursor with the contents of the bookmarks database for the current folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+                            // Apply text highlighting to `urlTextBox`.
+                            highlightUrlText();
+                        }
+                    }
 
-        // 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);
+                    // 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));
-
-                // 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);
+            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
+                // Get the current website SSL certificate.
+                SslCertificate currentWebsiteSslCertificate = error.getCertificate();
 
-                // Display the bitmap in `bookmarkFavoriteIcon`.
-                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
+                // 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();
 
-                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
-                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
-                bookmarkNameTextView.setText(bookmarkNameString);
+                // 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 `handler` so it can be accesses from `onSslErrorCancel()` and `onSslErrorProceed()`.
+                    sslErrorHandler = handler;  // TODO.  We need to pass this in instead of using a static variable.  Because multiple could be displayed at once from different tabs.
 
-                // 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);
+                    // Display the SSL error `AlertDialog`.
+                    DialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
+                    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) {
+                loadUrl(formattedUrlString);
+            }
         }
     }
 }
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