]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/activities/MainWebViewActivity.java
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[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
index c2d65ec51447b4a49224aafaef2d192684e25bcc..e39b54a440a9d54534f070a082d8327cad9afe4b 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2015-2018 Soren Stoutner <soren@stoutner.com>.
+ * Copyright © 2015-2019 Soren Stoutner <soren@stoutner.com>.
  *
  * Download cookie code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
  *
@@ -24,7 +24,6 @@ package com.stoutner.privacybrowser.activities;
 import android.Manifest;
 import android.annotation.SuppressLint;
 import android.app.Activity;
-import android.app.DialogFragment;
 import android.app.DownloadManager;
 import android.app.SearchManager;
 import android.content.ActivityNotFoundException;
@@ -53,30 +52,10 @@ import android.os.Handler;
 import android.preference.PreferenceManager;
 import android.print.PrintDocumentAdapter;
 import android.print.PrintManager;
-import android.support.annotation.NonNull;
-import android.support.design.widget.CoordinatorLayout;
-import android.support.design.widget.FloatingActionButton;
-import android.support.design.widget.NavigationView;
-import android.support.design.widget.Snackbar;
-import android.support.v4.app.ActivityCompat;
-import android.support.v4.content.ContextCompat;
-// `ShortcutInfoCompat`, `ShortcutManagerCompat`, and `IconCompat` can be switched to the non-compat version once API >= 26.
-import android.support.v4.content.pm.ShortcutInfoCompat;
-import android.support.v4.content.pm.ShortcutManagerCompat;
-import android.support.v4.graphics.drawable.IconCompat;
-import android.support.v4.view.GravityCompat;
-import android.support.v4.widget.DrawerLayout;
-import android.support.v4.widget.SwipeRefreshLayout;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.ActionBarDrawerToggle;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.app.AppCompatDialogFragment;
-import android.support.v7.widget.Toolbar;
 import android.text.Editable;
 import android.text.Spanned;
 import android.text.TextWatcher;
 import android.text.style.ForegroundColorSpan;
-import android.util.Log;
 import android.util.Patterns;
 import android.view.ContextMenu;
 import android.view.GestureDetector;
@@ -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 +168,24 @@ 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()`.
+    // `favoriteIconBitmap` is public static so it can be accessed from `BookmarksActivity`, `BookmarksDatabaseViewActivity`, `CreateBookmarkFolderDialog`,
+    // `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `EditBookmarkDatabaseViewDialog`, and `ViewSslCertificateDialog`.  It is also used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
+    // `onCreateHomeScreenShortcut()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `applyDomainSettings()`.
     public static Bitmap favoriteIconBitmap;
 
-    // `formattedUrlString` is public static so it can be accessed from `BookmarksActivity`, `CreateBookmarkDialog`, and `AddDomainDialog`.
+    // `favoriteIconDefaultBitmap` public static so it can be accessed from `PinnedMismatchDialog`.  It is also used in `onCreate()` and `applyDomainSettings`.
+    public static Bitmap favoriteIconDefaultBitmap;
+
+    // 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 +196,17 @@ 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;
@@ -278,58 +216,30 @@ 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;
+    // The current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
+    // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, `applyProxyThroughOrbot()`, and `applyDomainSettings()`.
+    private NestedScrollWebView currentWebView;
 
     // `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;
 
     // `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;
 
@@ -339,13 +249,28 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `searchURL` is used in `loadURLFromTextBox()` and `applyProxyThroughOrbot()`.
     private String searchURL;
 
-    // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
-    private Menu mainMenu;
+    // The options menu is set in `onCreateOptionsMenu()` and used in `onOptionsItemSelected()` and `updatePrivacyIcons()`.
+    private Menu optionsMenu;
 
-    // `refreshMenuItem` is used in `onCreate()` and `onCreateOptionsMenu()`.
+    // 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;
 
-    // The blocklist menu items are used in `onCreate()`, `onCreateOptionsMenu()`, and `onPrepareOptionsMenu()`.
+    // The navigation requests menu item is used in `onCreate()` and accessed from `WebViewPagerAdapter`.
+    private MenuItem navigationRequestsMenuItem;  // TODO.
+
+    // TODO.  This could probably be removed.
+    // The blocklist helper is used in `onCreate()` and `WebViewPagerAdapter`.
+    private BlockListHelper blockListHelper;
+
+    // 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()`.
     private MenuItem blocklistsMenuItem;
     private MenuItem easyListMenuItem;
     private MenuItem easyPrivacyMenuItem;
@@ -354,19 +279,9 @@ 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;
 
@@ -382,11 +297,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `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;
 
     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
     private boolean reapplyDomainSettingsOnRestart;
@@ -400,21 +312,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `downloadWithExternalApp` is used in `onCreate()`, `onCreateContextMenu()`, and `applyDomainSettings()`.
     private boolean downloadWithExternalApp;
 
-    // `currentDomainName` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onAddDomain()`, and `applyDomainSettings()`.
-    private String currentDomainName;
-
-    // `ignorePinnedSslCertificateForDomain` is used in `onCreate()`, `onSslMismatchProceed()`, and `applyDomainSettings()`.
-    private boolean ignorePinnedSslCertificate;
-
     // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
     private BroadcastReceiver orbotStatusBroadcastReceiver;
 
     // `waitingForOrbot` is used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
     private boolean waitingForOrbot;
 
-    // `domainSettingsApplied` is used in `prepareOptionsMenu()` and `applyDomainSettings()`.
-    private boolean domainSettingsApplied;
-
     // `domainSettingsJavaScriptEnabled` is used in `onOptionsItemSelected()` and `applyDomainSettings()`.
     private Boolean domainSettingsJavaScriptEnabled;
 
@@ -424,29 +327,25 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `privateDataDirectoryString` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`.
     private String privateDataDirectoryString;
 
-    // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private LinearLayout findOnPageLinearLayout;
-
     // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
     private EditText findOnPageEditText;
 
     // `displayAdditionalAppBarIcons` is used in `onCreate()` and `onCreateOptionsMenu()`.
     private boolean displayAdditionalAppBarIcons;
 
-    // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
-    private ActionBarDrawerToggle drawerToggle;
-
-    // `supportAppBar` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private Toolbar supportAppBar;
-
-    // `urlTextBox` is used in `onCreate()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, `loadUrl()`, and `highlightUrlText()`.
-    private EditText urlTextBox;
+    // The action bar drawer toggle is initialized in `onCreate()` and used in `onResume()`.
+    private ActionBarDrawerToggle actionBarDrawerToggle;
 
     // The color spans are used in `onCreate()` and `highlightUrlText()`.
     private ForegroundColorSpan redColorSpan;
     private ForegroundColorSpan initialGrayColorSpan;
     private ForegroundColorSpan finalGrayColorSpan;
 
+    // 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;
 
@@ -456,15 +355,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `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;
-
     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
     // and `loadBookmarksFolder()`.
     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
@@ -487,7 +377,7 @@ 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 +389,13 @@ 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.  We have to use the deprecated `getColor()` until API >= 23.
-    @SuppressWarnings("deprecation")
+    // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
+    @SuppressLint("ClickableViewAccessibility")
     protected void onCreate(Bundle savedInstanceState) {
         // Get a handle for the shared preferences.
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
@@ -533,41 +420,42 @@ 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 `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(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.
+        RelativeLayout urlRelativeLayout = findViewById(R.id.url_relativelayout);
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
         // Remove the formatting from `urlTextBar` when the user is editing the text.
-        urlTextBox.setOnFocusChangeListener((View v, boolean hasFocus) -> {
+        urlEditText.setOnFocusChangeListener((View v, boolean hasFocus) -> {
             if (hasFocus) {  // The user is editing the URL text box.
                 // Remove the highlighting.
-                urlTextBox.getText().removeSpan(redColorSpan);
-                urlTextBox.getText().removeSpan(initialGrayColorSpan);
-                urlTextBox.getText().removeSpan(finalGrayColorSpan);
+                urlEditText.getText().removeSpan(redColorSpan);
+                urlEditText.getText().removeSpan(initialGrayColorSpan);
+                urlEditText.getText().removeSpan(finalGrayColorSpan);
             } else {  // The user has stopped editing the URL text box.
                 // Move to the beginning of the string.
-                urlTextBox.setSelection(0);
+                urlEditText.setSelection(0);
 
                 // Reapply the highlighting.
                 highlightUrlText();
@@ -575,7 +463,7 @@ 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.
@@ -592,8 +480,7 @@ 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;
 
@@ -618,23 +505,155 @@ 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);
+        final 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);
+
+        // Listen for touches on the navigation menu.
+        navigationView.setNavigationItemSelectedListener(this);
+
+        // Get handles for the navigation menu and the back and forward menu items.  The menu is zero-based.
+        final Menu navigationMenu = navigationView.getMenu();
+        final MenuItem navigationCloseTabMenuItem = navigationMenu.getItem(0);
+        final MenuItem navigationBackMenuItem = navigationMenu.getItem(3);
+        final MenuItem navigationForwardMenuItem = navigationMenu.getItem(4);
+        final MenuItem navigationHistoryMenuItem = navigationMenu.getItem(5);
+        navigationRequestsMenuItem = navigationMenu.getItem(6);
+
+        // Initialize the web view pager adapter.
+        webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
+
+        // Set the pager adapter on the web view pager.
+        webViewPager.setAdapter(webViewPagerAdapter);
+
+        // Store up to 100 tabs in memory.
+        webViewPager.setOffscreenPageLimit(100);
+
+        // Update the web view pager every time a tab is modified.
+        webViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+            @Override
+            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+                // Do nothing.
+            }
+
+            @Override
+            public void onPageSelected(int position) {
+                // Get the WebView tab fragment.
+                WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(position);
+
+                // Get the fragment view.
+                View fragmentView = webViewTabFragment.getView();
+
+                // Remove the incorrect lint warning below that the fragment view might be null.
+                assert fragmentView != null;
+
+                // Store the current WebView.
+                currentWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+
+                // Update the privacy icons.  `true` redraws the icons in the app bar.
+                updatePrivacyIcons(true);
+
+                // Store the current formatted URL string.
+                formattedUrlString = currentWebView.getUrl();
+
+                // Clear the focus from the URL text box.
+                urlEditText.clearFocus();
+
+                // Hide the soft keyboard.
+                inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+
+                // 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));
+                }
+
+                // 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);
+
+                    // Assert that the corresponding tab is not null.
+                    assert correspondingTab != null;
+
+                    // Select the corresponding tab.
+                    correspondingTab.select();
+                }
+            }
+
+            @Override
+            public void onPageScrollStateChanged(int state) {
+                // Do nothing.
+            }
+        });
+
+        // Display the View SSL Certificate dialog when the currently selected tab is reselected.
+        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
+            @Override
+            public void onTabSelected(TabLayout.Tab tab) {
+                // Select the same page in the view pager.
+                webViewPager.setCurrentItem(tab.getPosition());
+            }
+
+            @Override
+            public void onTabUnselected(TabLayout.Tab tab) {
+                // Do nothing.
+            }
+
+            @Override
+            public void onTabReselected(TabLayout.Tab tab) {
+                // Instantiate the View SSL Certificate dialog.
+                DialogFragment viewSslCertificateDialogFragment = ViewSslCertificateDialog.displayDialog(currentWebView.getWebViewFragmentId());
+
+                // Display the View SSL Certificate dialog.
+                viewSslCertificateDialogFragment.show(getSupportFragmentManager(), getString(R.string.view_ssl_certificate));
+            }
+        });
+
+        // Add the first tab.
+        addTab(null);
 
         // Set the bookmarks drawer resources according to the theme.  This can't be done in the layout due to compatibility issues with the `DrawerLayout` support widget.
+        // The deprecated `getResources().getDrawable()` must be used until the minimum API >= 21 and and `getResources().getColor()` must be used until the minimum API >= 23.
         if (darkTheme) {
             launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_dark));
             createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_dark));
@@ -649,6 +668,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // 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.
+            BookmarksActivity.currentWebViewUrl = currentWebView.getUrl();
+            BookmarksActivity.currentWebViewTitle = currentWebView.getTitle();
+
             // Create an intent to launch the bookmarks activity.
             Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
 
@@ -661,124 +684,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // Set the create new bookmark folder FAB to display an alert dialog.
         createBookmarkFolderFab.setOnClickListener(v -> {
-            // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
-            AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
-            createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
+            // Show the create bookmark folder dialog and name the instance `@string/create_folder`.
+            DialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
+            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
         });
 
         // Set the create new bookmark FAB to display an alert dialog.
         createBookmarkFab.setOnClickListener(view -> {
-            // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
-            AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
-            createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
-        });
-
-        // Create a double-tap listener to toggle full-screen mode.
-        final GestureDetector gestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
-            // Override `onDoubleTap()`.  All other events are handled using the default settings.
-            @Override
-            public boolean onDoubleTap(MotionEvent event) {
-                if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
-                    // Toggle `inFullScreenBrowsingMode`.
-                    inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
-
-                    if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
-                        // Hide the `appBar`.
-                        appBar.hide();
-
-                        // Hide the banner ad in the free flavor.
-                        if (BuildConfig.FLAVOR.contentEquals("free")) {
-                            // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-                            AdHelper.hideAd(findViewById(R.id.adview));
-                        }
-
-                        // Modify the system bars.
-                        if (hideSystemBarsOnFullscreen) {  // Hide everything.
-                            // Remove the translucent overlays.
-                            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
-
-                            // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
-                            drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
-
-                            /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-                             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-                             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
-                             */
-                            rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-
-                            // Set `rootCoordinatorLayout` to fill the whole screen.
-                            rootCoordinatorLayout.setFitsSystemWindows(false);
-                        } else {  // Hide everything except the status and navigation bars.
-                            // Set `rootCoordinatorLayout` to fit under the status and navigation bars.
-                            rootCoordinatorLayout.setFitsSystemWindows(false);
-
-                            // There is an Android Support Library bug that causes a scrim to print on the right side of the `Drawer Layout` when the navigation bar is displayed on the right of the screen.
-                            if (translucentNavigationBarOnFullscreen) {
-                                // Set the navigation bar to be translucent.
-                                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
-                            }
-                        }
-                    } else {  // Switch to normal viewing mode.
-                        // Show the `appBar`.
-                        appBar.show();
-
-                        // Show the `BannerAd` in the free flavor.
-                        if (BuildConfig.FLAVOR.contentEquals("free")) {
-                            // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-                            AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
-                        }
-
-                        // Remove the translucent navigation bar flag if it is set.
-                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
-
-                        // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
-                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
-
-                        // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                        rootCoordinatorLayout.setSystemUiVisibility(0);
-
-                        // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-                        rootCoordinatorLayout.setFitsSystemWindows(true);
-                    }
-
-                    // Consume the double-tap.
-                    return true;
-                } else { // Do not consume the double-tap because full screen browsing mode is disabled.
-                    return false;
-                }
-            }
-        });
-
-        // Pass all touch events on `mainWebView` through `gestureDetector` to check for double-taps.
-        mainWebView.setOnTouchListener((View v, MotionEvent event) -> {
-            // Call `performClick()` on the view, which is required for accessibility.
-            v.performClick();
-
-            // Send the `event` to `gestureDetector`.
-            return gestureDetector.onTouchEvent(event);
-        });
+            // Instantiate the create bookmark dialog.
+            DialogFragment createBookmarkDialog = CreateBookmarkDialog.createBookmark(currentWebView.getUrl(), currentWebView.getTitle(), favoriteIconBitmap);
 
-        // Update `findOnPageCountTextView`.
-        mainWebView.setFindListener(new WebView.FindListener() {
-            // Get a handle for `findOnPageCountTextView`.
-            final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
-
-            @Override
-            public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
-                if ((isDoneCounting) && (numberOfMatches == 0)) {  // There are no matches.
-                    // Set `findOnPageCountTextView` to `0/0`.
-                    findOnPageCountTextView.setText(R.string.zero_of_zero);
-                } else if (isDoneCounting) {  // There are matches.
-                    // `activeMatchOrdinal` is zero-based.
-                    int activeMatch = activeMatchOrdinal + 1;
-
-                    // Build the match string.
-                    String matchString = activeMatch + "/" + numberOfMatches;
-
-                    // Set `findOnPageCountTextView`.
-                    findOnPageCountTextView.setText(matchString);
-                }
-            }
+            // Display the create bookmark dialog.
+            createBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.create_bookmark));
         });
 
         // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
@@ -796,15 +713,15 @@ 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;
@@ -815,34 +732,24 @@ 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.
@@ -856,7 +763,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             int databaseID = (int) id;
 
             // Get the bookmark cursor for this ID and move it to the first row.
-            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
+            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseID);
             bookmarkCursor.moveToFirst();
 
             // Act upon the bookmark according to the type.
@@ -890,19 +797,31 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
                 // Show the edit bookmark folder `AlertDialog` and name the instance `@string/edit_folder`.
-                AppCompatDialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
-                editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
+                DialogFragment editBookmarkFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
+                editBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.edit_folder));
             } else {
                 // Show the edit bookmark `AlertDialog` and name the instance `@string/edit_bookmark`.
-                AppCompatDialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
-                editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
+                DialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
+                editBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.edit_bookmark));
             }
 
             // Consume the event.
             return true;
         });
 
-        // The drawer listener is used to update the navigation menu.
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
+
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
+
+        // Calculate the drawer header padding.  This is used to move the text in the drawer headers below any cutouts.
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
+
+        // The drawer listener is used to update the navigation menu.`
         drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
             @Override
             public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
@@ -919,3795 +838,4405 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             @Override
             public void onDrawerStateChanged(int newState) {
                 if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // A drawer is opening or closing.
-                    // Update the back, forward, history, and requests menu items.
-                    navigationBackMenuItem.setEnabled(mainWebView.canGoBack());
-                    navigationForwardMenuItem.setEnabled(mainWebView.canGoForward());
-                    navigationHistoryMenuItem.setEnabled((mainWebView.canGoBack() || mainWebView.canGoForward()));
-                    navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
+                    // Get handles for the drawer headers.
+                    TextView navigationHeaderTextView = findViewById(R.id.navigationText);
+                    TextView bookmarksHeaderTextView = findViewById(R.id.bookmarks_title_textview);
+
+                    // Apply the navigation header paddings if the view is not null (sometimes it is null if another activity has already started).  This moves the text in the header below any cutouts.
+                    if (navigationHeaderTextView != null) {
+                        navigationHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
+                    }
+
+                    // Apply the bookmarks header paddings if the view is not null (sometimes it is null if another activity has already started).  This moves the text in the header below any cutouts.
+                    if (bookmarksHeaderTextView != null) {
+                        bookmarksHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
+                    }
+
+                    // Update the navigation menu items.
+                    navigationCloseTabMenuItem.setEnabled(tabLayout.getTabCount() > 1);
+                    navigationBackMenuItem.setEnabled(currentWebView.canGoBack());
+                    navigationForwardMenuItem.setEnabled(currentWebView.canGoForward());
+                    navigationHistoryMenuItem.setEnabled((currentWebView.canGoBack() || currentWebView.canGoForward()));
+                    navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
 
                     // Hide the keyboard (if displayed).
-                    inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
+                    inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
 
                     // Clear the focus from from the URL text box and the WebView.  This removes any text selection markers and context menus, which otherwise draw above the open drawers.
-                    urlTextBox.clearFocus();
-                    mainWebView.clearFocus();
+                    urlEditText.clearFocus();
+                    currentWebView.clearFocus();
                 }
             }
         });
 
-        // drawerToggle creates the hamburger icon at the start of the AppBar.
-        drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
-
-        // Get a handle for the progress bar.
-        final ProgressBar progressBar = findViewById(R.id.progress_bar);
+        // 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);
 
-        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 cookieManager.
+        cookieManager = CookieManager.getInstance();
 
-                // Update the progress bar.
-                progressBar.setProgress(progress);
+        // 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", "");
 
-                // 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 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);
 
-                    // 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);
-                    }
+        // Get a handle for the `Runtime`.
+        privacyBrowserRuntime = Runtime.getRuntime();
 
-                    //Stop the swipe to refresh indicator if it is running
-                    swipeRefreshLayout.setRefreshing(false);
-                }
-            }
+        // 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 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;
+        // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
+        inFullScreenBrowsingMode = false;
 
-                    // Place the favorite icon in the appBar.
-                    favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
-                }
-            }
+        // Initialize the privacy settings variables.
+        firstPartyCookiesEnabled = false;
+        saveFormDataEnabled = false;  // Form data can be removed once the minimum API >= 26.
+        nightMode = false;
 
-            // 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;
-            }
+        // 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);
 
-            // Enter full screen video.
-            @Override
-            public void onShowCustomView(View view, CustomViewCallback callback) {
-                // Set the full screen video flag.
-                displayingFullScreenVideo = true;
+        // Get a handle for the WebView.
+        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
 
-                // 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));
-                }
+        // Store the default user agent.
+        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
 
-                // Remove the translucent overlays.
-                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+        // Destroy the bare WebView.
+        bareWebView.destroy();
 
-                // 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);
+        // 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();
 
-                /* 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);
+        // If the favorite icon is null, load the default.
+        if (favoriteIconBitmap == null) {
+            favoriteIconBitmap = favoriteIconDefaultBitmap;
+        }
 
-                // Set `rootCoordinatorLayout` to fill the entire screen.
-                rootCoordinatorLayout.setFitsSystemWindows(false);
+        // 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);
 
-                // Disable the sliding drawers.
-                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
+        // Get the intent that started the app.
+        Intent launchingIntent = getIntent();
 
-                // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
-                fullScreenVideoFrameLayout.addView(view);
-                fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
-            }
+        // Get the information from the intent.
+        String launchingIntentAction = launchingIntent.getAction();
+        Uri launchingIntentUriData = launchingIntent.getData();
 
-            // Exit full screen video.
-            @Override
-            public void onHideCustomView() {
-                // Unset the full screen video flag.
-                displayingFullScreenVideo = false;
+        // 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;
 
-                // Hide `fullScreenVideoFrameLayout`.
-                fullScreenVideoFrameLayout.removeAllViews();
-                fullScreenVideoFrameLayout.setVisibility(View.GONE);
+            // Sanitize the search input and convert it to a search.
+            try {
+                encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                encodedUrlString = "";
+            }
 
-                // Enable the sliding drawers.
-                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
+            // 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();
+        }
+    }
 
-                // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
-                if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
-                    if (hideSystemBarsOnFullscreen) {  // Hide everything.
-                        // Remove the translucent navigation setting if it is currently flagged.
-                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+    @Override
+    protected void onNewIntent(Intent intent) {
+        // Add a new tab.
+        addTab(null);
 
-                        // Remove the translucent status bar overlay.
-                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+        // 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);
 
-                        // 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 the information from the intent.
+        String intentAction = intent.getAction();
+        Uri intentUriData = intent.getData();
 
-                        /* 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);
+        // 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;
 
-                        // Add the translucent status flag if it is unset.
-                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            // Sanitize the search input and convert it to a search.
+            try {
+                encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                encodedUrlString = "";
+            }
 
-                        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();
-                    }
+            // 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();
+        }
 
-                    // 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));
-                    }
+        // Load the URL.
+        loadUrl(formattedUrlString);
 
-                    // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                    rootCoordinatorLayout.setSystemUiVisibility(0);
+        // Get a handle for the drawer layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-                    // Remove the translucent navigation bar flag if it is set.
-                    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+        // 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.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
-                    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+        // Close the bookmarks drawer if it is open.
+        if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
+            drawerLayout.closeDrawer(GravityCompat.END);
+        }
 
-                    // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-                    rootCoordinatorLayout.setFitsSystemWindows(true);
-                }
+        // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
+        currentWebView.requestFocus();
+    }
 
-                // 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));
-                }
-            }
+    @Override
+    public void onRestart() {
+        // Run the default commands.
+        super.onRestart();
 
-            // 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;
+        // 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");
 
-                    // Create an intent to open a chooser based ont the file chooser parameters.
-                    Intent fileChooserIntent = fileChooserParams.createIntent();
+            // Send the intent to the Orbot package.
+            orbotIntent.setPackage("org.torproject.android");
 
-                    // 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;
-            }
-        });
+            // Make it so.
+            sendBroadcast(orbotIntent);
+        }
 
-        // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
-        registerForContextMenu(mainWebView);
+        // Apply the app settings if returning from the Settings activity.
+        if (reapplyAppSettingsOnRestart) {
+            // Apply the app settings.
+            applyAppSettings();
 
-        // 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.
+            // 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);
 
-                    // Store the variables for future use by `onRequestPermissionsResult()`.
-                    downloadUrl = url;
-                    downloadContentDisposition = contentDisposition;
-                    downloadContentLength = contentLength;
+                    // Get the fragment view.
+                    View fragmentView = webViewTabFragment.getView();
 
-                    // 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 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);
 
-                        // 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);
+                        // Reload the WebView.  This doesn't seem to work if for WebViews that aren't visible.
+                        nestedScrollWebView.reload();
                     }
-                } else {  // The storage permission has already been granted.
-                    // Get a handle for the download file alert dialog.
-                    AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
-
-                    // Show the download file alert dialog.
-                    downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
                 }
+
+                // Reset `reloadOnRestartBoolean`.
+                reloadOnRestart = false;
             }
-        });
 
-        // Allow pinch to zoom.
-        mainWebView.getSettings().setBuiltInZoomControls(true);
+            // Reset the return from settings flag.
+            reapplyAppSettingsOnRestart = false;
+        }
 
-        // Hide zoom controls.
-        mainWebView.getSettings().setDisplayZoomControls(false);
+        // 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);
 
-        // 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);
+            // Reset `reapplyDomainSettingsOnRestart`.
+            reapplyDomainSettingsOnRestart = false;
+        }
 
-        // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
-        mainWebView.getSettings().setLoadWithOverviewMode(true);
+        // Load the URL on restart to apply changes to night mode.
+        if (loadUrlOnRestart) {
+            // Load the current `formattedUrlString`.
+            loadUrl(formattedUrlString);
 
-        // Explicitly disable geolocation.
-        mainWebView.getSettings().setGeolocationEnabled(false);
+            // Reset `loadUrlOnRestart.
+            loadUrlOnRestart = false;
+        }
 
-        // Initialize cookieManager.
-        cookieManager = CookieManager.getInstance();
+        // 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);
 
-        // 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", "");
+            // Close the bookmarks drawer.
+            drawerLayout.closeDrawer(GravityCompat.END);
 
-        // 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);
+            // Reload the bookmarks drawer.
+            loadBookmarksFolder();
 
-        // Get a handle for the `Runtime`.
-        privacyBrowserRuntime = Runtime.getRuntime();
+            // Reset `restartFromBookmarksActivity`.
+            restartFromBookmarksActivity = false;
+        }
 
-        // 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`.
+        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
+        updatePrivacyIcons(true);
+    }
 
-        // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
-        inFullScreenBrowsingMode = false;
+    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
+    @Override
+    public void onResume() {
+        // Run the default commands.
+        super.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;
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-        // Store the default user agent.
-        webViewDefaultUserAgent = mainWebView.getSettings().getUserAgentString();
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-        // Initialize the WebView title.
-        webViewTitle = getString(R.string.no_title);
+            // Only 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);
 
-        // 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();
+                // Resume the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.resumeTimers();
 
-        // If the favorite icon is null, load the default.
-        if (favoriteIconBitmap == null) {
-            favoriteIconBitmap = favoriteIconDefaultBitmap;
+                // Resume the nested scroll WebView.
+                nestedScrollWebView.onResume();
+            }
         }
 
-        // 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);
+        // 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);
 
-        // Apply the app settings from the shared preferences.
-        applyAppSettings();
+            // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
+            currentWebView.loadData(waitingForOrbotHtmlString, "text/html", null);
+        }
 
-        // Instantiate the block list helper.
-        BlockListHelper blockListHelper = new BlockListHelper();
+        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
+            // Get a handle for the root frame layouts.
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
 
-        // Initialize the list of resource requests.
-        resourceRequests = new ArrayList<>();
+            // 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);
 
-        // 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");
+            /* 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));
+        }
+    }
 
-        // 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];
+    @Override
+    public void onPause() {
+        // Run the default commands.
+        super.onPause();
 
-        // Get a handle for the activity.  This is used to update the requests counter while the navigation menu is open.
-        Activity activity = this;
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-        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 = "";
-
-                    // 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);
-
-                    // 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);
-
-                        // 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));
-
-                    // Open the email program in a new task instead of as part of Privacy Browser.
-                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-
-                    // 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 the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-                    // Add the phone number to the intent.
-                    dialIntent.setData(Uri.parse(url));
+            // 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);
 
-                    // Open the dialer in a new task instead of as part of Privacy Browser.
-                    dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                // Pause the nested scroll WebView.
+                nestedScrollWebView.onPause();
 
-                    // Make it so.
-                    startActivity(dialIntent);
+                // Pause the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.pauseTimers();
+            }
+        }
 
-                    // 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);
+        // 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));
+        }
+    }
 
-                    // Add the URL to the intent.
-                    genericIntent.setData(Uri.parse(url));
+    @Override
+    public void onDestroy() {
+        // Unregister the Orbot status broadcast receiver.
+        this.unregisterReceiver(orbotStatusBroadcastReceiver);
 
-                    // List all apps that can handle the URL instead of just opening the first one.
-                    genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
+        // Close the bookmarks cursor and database.
+        bookmarksCursor.close();
+        bookmarksDatabaseHelper.close();
 
-                    // Open the app in a new task instead of as part of Privacy Browser.
-                    genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // Run the default commands.
+        super.onDestroy();
+    }
 
-                    // Start the app or display a snackbar if no app is available to handle the URL.
-                    try {
-                        startActivity(genericIntent);
-                    } catch (ActivityNotFoundException exception) {
-                        Snackbar.make(mainWebView, getString(R.string.unrecognized_url) + "  " + url, Snackbar.LENGTH_SHORT).show();
-                    }
+    @Override
+    public boolean 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);
 
-                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
-                    return true;
-                }
-            }
+        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
+        optionsMenu = menu;
 
-            // 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()));
+        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
+        updatePrivacyIcons(false);
 
-                // Reset the whitelist results tracker.
-                whiteListResultStringArray = null;
+        // 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);
 
-                // Initialize the third party request tracker.
-                boolean isThirdPartyRequest = false;
+        // Only display third-party cookies if API >= 21
+        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 
-                // Initialize the current domain string.
-                String currentDomain = "";
+        // 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);
 
-                // 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);
+        // Only show Ad Consent if this is the free flavor.
+        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
 
-                    // Get the domain host names.
-                    String currentBaseDomain = currentDomainUri.getHost();
-                    String requestBaseDomain = requestDomainUri.getHost();
+        // Get the shared preference values.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // Update the current domain variable.
-                    currentDomain = currentBaseDomain;
+        // Get the status of the additional AppBar icons.
+        displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
 
-                    // 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);
-                        }
+        // 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);
+        }
 
-                        // 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);
-                        }
+        // Replace Refresh with Stop if a URL is already loading.
+        if (currentWebView != null && currentWebView.getProgress() != 100) {
+            // Set the title.
+            refreshMenuItem.setTitle(R.string.stop);
 
-                        // Update the third party request tracker.
-                        isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
-                    }
+            // 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);
                 }
+            }
+        }
 
-                // 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));
-                    });
+        return true;
+    }
 
-                    // Add the request to the log.
-                    resourceRequests.add(new String[]{String.valueOf(REQUEST_THIRD_PARTY), url});
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        // Get a handle for the swipe refresh layout.
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 
-                    // Return an empty web resource response.
-                    return emptyWebResourceResponse;
-                }
+        // 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);
 
-                // Check UltraPrivacy if it is enabled.
-                if (ultraPrivacyEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, ultraPrivacy)) {
-                        // Increment the blocked requests counters.
-                        blockedRequests++;
-                        ultraPrivacyBlockedRequests++;
+        // Initialize the current user agent string and the font size.
+        String currentUserAgent = getString(R.string.user_agent_privacy_browser);
+        int fontSize = 100;
 
-                        // 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));
-                        });
+        // 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);
+            }
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
+            // 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));
+        }
 
-                    // 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);
+        // 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);
 
-                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
-                        return null;
-                    }
-                }
+        // 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));
 
-                // Check EasyList if it is enabled.
-                if (easyListEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyList)) {
-                        // Increment the blocked requests counters.
-                        blockedRequests++;
-                        easyListBlockedRequests++;
+            // Enable third-party cookies if first-party cookies are enabled.
+            toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
+        }
 
-                        // 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));
-                        });
+        // Enable DOM Storage if JavaScript is enabled.
+        toggleDomStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+        // Enable Clear Cookies if there are any.
+        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                }
+        // 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;
+        }
 
-                // Check EasyPrivacy if it is enabled.
-                if (easyPrivacyEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyPrivacy)) {
-                        // Increment the blocked requests counters.
-                        blockedRequests++;
-                        easyPrivacyBlockedRequests++;
+        // 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;
+        }
 
-                        // 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));
-                        });
+        // Enable Clear DOM Storage if there is any.
+        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+        // 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 was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                }
+        // Enable Clear Data if any of the submenu items are enabled.
+        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
 
-                // 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++;
-
-                        // 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));
-                        });
+        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
+        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+        // 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);
+        }
 
-                        // 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++;
+        // Instantiate the font size title and the selected font size menu item.
+        String fontSizeTitle;
+        MenuItem selectedFontSizeMenuItem;
 
-                        // Update the titles of the blocklist menu items.  This must be run from the UI thread.
-                        activity.runOnUiThread(() -> {
-                            navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
-                            fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
-                        });
+        // 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;
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+            case 50:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
+                break;
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                }
+            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;
 
-                // 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});
-                }
+            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 has not been blocked.  `return null` loads the requested resource.
-                return null;
-            }
+            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;
 
-            // Handle HTTP authentication requests.
-            @Override
-            public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
-                // Store `handler` so it can be accessed from `onHttpAuthenticationCancel()` and `onHttpAuthenticationProceed()`.
-                httpAuthHandler = handler;
+            case 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;
 
-                // Display the HTTP authentication dialog.
-                AppCompatDialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
-                httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
-            }
+            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;
 
-            // 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();
+            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;
 
-                // Initialize the counters for requests blocked by each blocklist.
-                blockedRequests = 0;
-                easyListBlockedRequests = 0;
-                easyPrivacyBlockedRequests = 0;
-                fanboysAnnoyanceListBlockedRequests = 0;
-                fanboysSocialBlockingListBlockedRequests = 0;
-                ultraPrivacyBlockedRequests = 0;
-                thirdPartyBlockedRequests = 0;
+            default:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+                break;
+        }
 
-                // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
-                if (nightMode) {
-                    mainWebView.setVisibility(View.INVISIBLE);
-                }
+        // Set the font size title and select the current size menu item.
+        fontSizeMenuItem.setTitle(fontSizeTitle);
+        selectedFontSizeMenuItem.setChecked(true);
 
-                // Hide the keyboard.  `0` indicates no additional flags.
-                inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
+        // Run all the other default commands.
+        super.onPrepareOptionsMenu(menu);
 
-                // 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 the menu.
+        return true;
+    }
 
-                    // Display the formatted URL text.
-                    urlTextBox.setText(formattedUrlString);
+    @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);
 
-                    // Apply text highlighting to `urlTextBox`.
-                    highlightUrlText();
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
 
-                    // 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);
+            /* Hide the system bars.
+             * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+             * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+             */
+            rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                    View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+        }
 
-                        // Reset `navigatingHistory`.
-                        navigatingHistory = false;
+        // Get the selected menu item ID.
+        int menuItemId = menuItem.getItemId();
 
-                        // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
-                        if (userAgentChanged) {
-                            loadUrl(formattedUrlString);
-                        }
-                    }
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // 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;
+        // 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());
 
-                    // 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);
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(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);
-                            }
-                        }
-                    }
+                // 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();
                 }
-            }
 
-            // 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);
-                }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                // Flush any cookies to persistent storage.  `CookieManager` has become very lazy about flushing cookies in recent versions.
-                if (firstPartyCookiesEnabled && Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.flush();
-                }
+            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();
 
-                // Update the Refresh menu item if it has been created.
-                if (refreshMenuItem != null) {
-                    // Reset the Refresh title.
-                    refreshMenuItem.setTitle(R.string.refresh);
+                    // 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();
 
-                    // 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);
-                        }
-                    }
-                }
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-                // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
-                urlIsLoading = false;
+                    // 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);
 
-                // Clear the cache and history if Incognito Mode is enabled.
-                if (incognitoModeEnabled) {
-                    // Clear the cache.  `true` includes disk files.
-                    mainWebView.clearCache(true);
+                    // Make it so.
+                    startActivity(domainsIntent);
+                } else {  // Add a new domain.
+                    // Apply the new domain settings on returning to `MainWebViewActivity`.
+                    reapplyDomainSettingsOnRestart = true;
+                    currentWebView.resetCurrentDomainName();
 
-                    // Clear the back/forward history.
-                    mainWebView.clearHistory();
+                    // Get the current domain
+                    Uri currentUri = Uri.parse(formattedUrlString);
+                    String currentDomain = currentUri.getHost();
 
-                    // Manually delete cache folders.
-                    try {
-                        // Delete the main cache directory.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+                    // 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 secondary `Service Worker` cache directory.
-                        // A `String[]` must be used because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
-                        privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
-                    } catch (IOException e) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+                    // Create the domain and store the database ID.
+                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
 
-                // 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 = "";
+                    // 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();
 
-                        urlTextBox.setText(formattedUrlString);
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-                        // Request focus for `urlTextBox`.
-                        urlTextBox.requestFocus();
+                    // 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);
 
-                        // Display the keyboard.
-                        inputMethodManager.showSoftInput(urlTextBox, 0);
+                    // Make it so.
+                    startActivity(domainsIntent);
+                }
+                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_first_party_cookies:
+                // Switch the status of firstPartyCookiesEnabled.
+                firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
 
-                        // 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(firstPartyCookiesEnabled);
 
-                            // Apply text highlighting to `urlTextBox`.
-                            highlightUrlText();
-                        }
-                    }
+                // Apply the new cookie status.
+                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
 
-                    // 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();
-                        }
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-                        // 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 = "";
+                // 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();
+                }
 
-                        // Convert the `Dates` to `Strings` if they are not `null`.
-                        if (currentWebsiteSslStartDate != null) {
-                            currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString();
-                        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                        if (currentWebsiteSslEndDate != null) {
-                            currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString();
-                        }
-
-                        if (pinnedDomainSslStartDate != null) {
-                            pinnedDomainSslStartDateString = pinnedDomainSslStartDate.toString();
-                        }
+            case R.id.toggle_third_party_cookies:
+                if (Build.VERSION.SDK_INT >= 21) {
+                    // Switch the status of thirdPartyCookiesEnabled.
+                    cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
 
-                        if (pinnedDomainSslEndDate != null) {
-                            pinnedDomainSslEndDateString = pinnedDomainSslEndDate.toString();
-                        }
+                    // Update the menu checkbox.
+                    menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
 
-                        // 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 (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();
                     }
-                }
-            }
 
-            // 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();
+                } // Else do nothing because SDK < 21.
+                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();
+            case R.id.toggle_dom_storage:
+                // Toggle the status of domStorageEnabled.
+                currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
 
-                // 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(currentWebView.getSettings().getDomStorageEnabled());
 
-                    // Display the SSL error `AlertDialog`.
-                    AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
-                    sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
+                // Update the privacy icon.  `true` refreshes the app bar icons.
+                updatePrivacyIcons(true);
+
+                // 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();
                 }
-            }
-        });
 
-        // Get the intent that started the app.
-        Intent launchingIntent = getIntent();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Get the information from the intent.
-        String launchingIntentAction = launchingIntent.getAction();
-        Uri launchingIntentUriData = launchingIntent.getData();
+            // Form data can be removed once the minimum API >= 26.
+            case R.id.toggle_save_form_data:
+                // Switch the status of saveFormDataEnabled.
+                saveFormDataEnabled = !saveFormDataEnabled;
 
-        // 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;
+                // Update the menu checkbox.
+                menuItem.setChecked(saveFormDataEnabled);
 
-            Log.i("Intent", launchingIntent.getStringExtra(SearchManager.QUERY));
+                // Apply the new form data status.
+                currentWebView.getSettings().setSaveFormData(saveFormDataEnabled);
 
-            // Sanitize the search input and convert it to a search.
-            try {
-                encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
-            }
+                // 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();
+                }
 
-            // 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();
-        }
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-        // Load the website if not waiting for Orbot to connect.
-        if (!waitingForOrbot) {
-            loadUrl(formattedUrlString);
-        }
-    }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-    @Override
-    protected void onNewIntent(Intent intent) {
-        // Sets the new intent as the activity intent, so that any future `getIntent()`s pick up this one instead of creating a new activity.
-        setIntent(intent);
+            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;
 
-        Log.i("Intent", intent.getAction());
+                                    // 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;
 
-        // Get the information from the intent.
-        String intentAction = intent.getAction();
-        Uri intentUriData = intent.getData();
+            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;
 
-        // 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;
+                                    // The snackbar was dismissed without the undo button being pushed.
+                                    default:
+                                        // Delete the DOM Storage.
+                                        WebStorage webStorage = WebStorage.getInstance();
+                                        webStorage.deleteAllData();
 
-            // Sanitize the search input and convert it to a search.
-            try {
-                encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
-            }
+                                        // Initialize a handler to manually delete the DOM storage files and directories.
+                                        Handler deleteDomStorageHandler = new Handler();
 
-            // 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();
-        }
+                                        // Setup a runnable to manually delete the DOM storage files and directories.
+                                        Runnable deleteDomStorageRunnable = () -> {
+                                            try {
+                                                // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                                                Process deleteLocalStorageProcess = privacyBrowserRuntime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
 
-        // Load the URL.
-        loadUrl(formattedUrlString);
+                                                // Multiple commands must be used because `Runtime.exec()` does not like `*`.
+                                                Process deleteIndexProcess = privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
+                                                Process deleteQuotaManagerProcess = privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
+                                                Process deleteQuotaManagerJournalProcess = privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
+                                                Process deleteDatabasesProcess = privacyBrowserRuntime.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.
+                                            }
+                                        };
 
-        // Close the navigation drawer if it is open.
-        if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
-            drawerLayout.closeDrawer(GravityCompat.START);
-        }
+                                        // Manually delete the DOM storage files after 200 milliseconds.
+                                        deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
+                                }
+                            }
+                        })
+                        .show();
+                return true;
 
-        // Close the bookmarks drawer if it is open.
-        if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
-            drawerLayout.closeDrawer(GravityCompat.END);
-        }
+            // 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;
 
-        // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
-        mainWebView.requestFocus();
-    }
+                                    // 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;
 
-    @Override
-    public void onRestart() {
-        // Run the default commands.
-        super.onRestart();
+            case R.id.easylist:
+                // Toggle the EasyList status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASY_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
 
-        // 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");
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
 
-            // Send the intent to the Orbot package.
-            orbotIntent.setPackage("org.torproject.android");
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // Make it so.
-            sendBroadcast(orbotIntent);
-        }
+            case R.id.easyprivacy:
+                // Toggle the EasyPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
 
-        // Apply the app settings if returning from the Settings activity..
-        if (reapplyAppSettingsOnRestart) {
-            // Apply the app settings.
-            applyAppSettings();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
 
-            // Reload the webpage if displaying of images has been disabled in the Settings activity.
-            if (reloadOnRestart) {
-                // Reload `mainWebView`.
-                mainWebView.reload();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                // Reset `reloadOnRestartBoolean`.
-                reloadOnRestart = false;
-            }
+            case R.id.fanboys_annoyance_list:
+                // Toggle Fanboy's Annoyance List status.
+                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-            // Reset the return from settings flag.
-            reapplyAppSettingsOnRestart = false;
-        }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-        // Apply the domain settings if returning from the Domains activity.
-        if (reapplyDomainSettingsOnRestart) {
-            // Reapply the domain settings.
-            applyDomainSettings(formattedUrlString, false, true);
+                // 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 `reapplyDomainSettingsOnRestart`.
-            reapplyDomainSettingsOnRestart = false;
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Load the URL on restart to apply changes to night mode.
-        if (loadUrlOnRestart) {
-            // Load the current `formattedUrlString`.
-            loadUrl(formattedUrlString);
+            case R.id.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 `loadUrlOnRestart.
-            loadUrlOnRestart = false;
-        }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
 
-        // Update the bookmarks drawer if returning from the Bookmarks activity.
-        if (restartFromBookmarksActivity) {
-            // Close the bookmarks drawer.
-            drawerLayout.closeDrawer(GravityCompat.END);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // Reload the bookmarks drawer.
-            loadBookmarksFolder();
+            case R.id.ultraprivacy:
+                // Toggle the UltraPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.ULTRA_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
 
-            // Reset `restartFromBookmarksActivity`.
-            restartFromBookmarksActivity = false;
-        }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
 
-        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
-        updatePrivacyIcons(true);
-    }
-
-    // `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.block_all_third_party_requests:
+                //Toggle the third-party requests blocker status.
+                currentWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, !currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-        // Resume `mainWebView`.
-        mainWebView.onResume();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-        // Resume the adView for the free flavor.
-        if (BuildConfig.FLAVOR.contentEquals("free")) {
-            // Resume the ad.
-            AdHelper.resumeAd(findViewById(R.id.adview));
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // 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);
+            case R.id.user_agent_privacy_browser:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
 
-            // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
-            mainWebView.loadData(waitingForOrbotHtmlString, "text/html", null);
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        if (displayingFullScreenVideo) {
-            // Remove the translucent overlays.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            case R.id.user_agent_webview_default:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString("");
 
-            // 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);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
-             */
-            rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-        }
-    }
+            case R.id.user_agent_firefox_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
 
-    @Override
-    public void onPause() {
-        // Run the default commands.
-        super.onPause();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Pause `mainWebView`.
-        mainWebView.onPause();
+            case R.id.user_agent_chrome_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
 
-        // Stop all JavaScript.
-        mainWebView.pauseTimers();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Pause the ad or it will continue to consume resources in the background on the free flavor.
-        if (BuildConfig.FLAVOR.contentEquals("free")) {
-            // Pause the ad.
-            AdHelper.pauseAd(findViewById(R.id.adview));
-        }
-    }
+            case R.id.user_agent_safari_on_ios:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
 
-    @Override
-    public void onDestroy() {
-        // Unregister the Orbot status broadcast receiver.
-        this.unregisterReceiver(orbotStatusBroadcastReceiver);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Close the bookmarks cursor and database.
-        bookmarksCursor.close();
-        bookmarksDatabaseHelper.close();
+            case R.id.user_agent_firefox_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
 
-        // Run the default commands.
-        super.onDestroy();
-    }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-    @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        // Inflate the menu; this adds items to the action bar if it is present.
-        getMenuInflater().inflate(R.menu.webview_options_menu, menu);
+            case R.id.user_agent_chromium_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
 
-        // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
-        mainMenu = menu;
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
-        updatePrivacyIcons(false);
+            case R.id.user_agent_firefox_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
 
-        // Get handles for the menu items.
-        MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
-        MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
-        MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
-        MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
-        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
-        refreshMenuItem = menu.findItem(R.id.refresh);
-        blocklistsMenuItem = menu.findItem(R.id.blocklists);
-        easyListMenuItem = menu.findItem(R.id.easylist);
-        easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
-        fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
-        fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
-        ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
-        blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
-        MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Only display third-party cookies if API >= 21
-        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
+            case R.id.user_agent_chrome_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
 
-        // 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);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Only show Ad Consent if this is the free flavor.
-        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
+            case R.id.user_agent_edge_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
 
-        // Get the shared preference values.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Get the status of the additional AppBar icons.
-        displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
+            case R.id.user_agent_internet_explorer_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
 
-        // 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);
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Replace Refresh with Stop if a URL is already loading.
-        if (urlIsLoading) {
-            // Set the title.
-            refreshMenuItem.setTitle(R.string.stop);
+            case R.id.user_agent_safari_on_macos:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
 
-            // 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);
-                }
-            }
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        return true;
-    }
+            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)));
 
-    @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);
+                // Reload the current WebView.
+                currentWebView.reload();
+                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_twenty_five_percent:
+                currentWebView.getSettings().setTextZoom(25);
+                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_fifty_percent:
+                currentWebView.getSettings().setTextZoom(50);
+                return true;
 
-        // Enable third-party cookies if first-party cookies are enabled.
-        toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
+            case R.id.font_size_seventy_five_percent:
+                currentWebView.getSettings().setTextZoom(75);
+                return true;
 
-        // Enable DOM Storage if JavaScript is enabled.
-        toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
+            case R.id.font_size_one_hundred_percent:
+                currentWebView.getSettings().setTextZoom(100);
+                return true;
 
-        // Enable Clear Cookies if there are any.
-        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
+            case R.id.font_size_one_hundred_twenty_five_percent:
+                currentWebView.getSettings().setTextZoom(125);
+                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.font_size_one_hundred_fifty_percent:
+                currentWebView.getSettings().setTextZoom(150);
+                return true;
 
-        // Get a count of the number of files in the IndexedDB directory.
-        File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
-        int indexedDBDirectoryNumberOfFiles = 0;
-        if (indexedDBDirectory.exists()) {
-            indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
-        }
+            case R.id.font_size_one_hundred_seventy_five_percent:
+                currentWebView.getSettings().setTextZoom(175);
+                return true;
 
-        // Enable Clear DOM Storage if there is any.
-        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
+            case R.id.font_size_two_hundred_percent:
+                currentWebView.getSettings().setTextZoom(200);
+                return true;
 
-        // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
-        if (Build.VERSION.SDK_INT < 26) {
-            WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
-            clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
-        } else {
-            // Disable clear form data because it is not supported on current version of Android.
-            clearFormDataMenuItem.setEnabled(false);
-        }
+            case R.id.swipe_to_refresh:
+                // Get a handle for the swipe refresh layout.
+                SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 
-        // Enable Clear Data if any of the submenu items are enabled.
-        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
+                // Toggle swipe to refresh.
+                swipeRefreshLayout.setEnabled(!swipeRefreshLayout.isEnabled());
+                return true;
 
-        // Disable Fanboy's Social Blocking List if Fanboy's Annoyance List is checked.
-        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
+            case R.id.display_images:
+                if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
+                    // Disable loading of images.
+                    currentWebView.getSettings().setLoadsImagesAutomatically(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));
+                    // 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;
 
-        // Get the current user agent.
-        String currentUserAgent = mainWebView.getSettings().getUserAgentString();
+            case R.id.night_mode:
+                // Toggle night mode.
+                nightMode = !nightMode;
 
-        // 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);
-        }
+                // 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 font size variables.
-        int fontSize = mainWebView.getSettings().getTextZoom();
-        String fontSizeTitle;
-        MenuItem selectedFontSizeMenuItem;
+                // Update the privacy icons.
+                updatePrivacyIcons(false);
 
-        // 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);
+                // Reload the website.
+                currentWebView.reload();
+                return 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);
+
+                // Hide the toolbar.
+                toolbar.setVisibility(View.GONE);
+
+                // Show the find on page linear layout.
+                findOnPageLinearLayout.setVisibility(View.VISIBLE);
+
+                // Display the keyboard.  The app must wait 200 ms before running the command to work around a bug in Android.
+                // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
+                findOnPageEditText.postDelayed(() -> {
+                    // Set the focus on `findOnPageEditText`.
+                    findOnPageEditText.requestFocus();
+
+                    // Display the keyboard.  `0` sets no input flags.
+                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
+                }, 200);
+                return true;
+
+            case R.id.view_source:
+                // Create an intent to launch the view source activity.
+                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
+
+                // Add the user agent as an extra to the intent.
+                viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
+
+                // Make it so.
+                startActivity(viewSourceIntent);
+                return true;
+
+            case R.id.share_url:
+                // Setup the share string.
+                String shareString = currentWebView.getTitle() + " – " + formattedUrlString;
+
+                // Create the share intent.
+                Intent shareIntent = new Intent(Intent.ACTION_SEND);
+                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
+                shareIntent.setType("text/plain");
+
+                // Make it so.
+                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
+                return true;
+
+            case R.id.print:
+                // Get a `PrintManager` instance.
+                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
+
+                // Create a print document adapter form the current WebView.
+                PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
+
+                // Remove the lint error below that `printManager` might be `null`.
+                assert printManager != null;
+
+                // Print the document.  The print attributes are `null`.
+                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
+                return true;
+
+            case R.id.open_with_app:
+                openWithApp(formattedUrlString);
+                return true;
+
+            case R.id.open_with_browser:
+                openWithBrowser(formattedUrlString);
+                return true;
+
+            case R.id.add_to_homescreen:
+                // Instantiate the create home screen shortcut dialog.
+                DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), formattedUrlString, favoriteIconBitmap);
+
+                // 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;
+
+            case R.id.ad_consent:
+                // Display the ad consent dialog.
+                DialogFragment adConsentDialogFragment = new AdConsentDialog();
+                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
+                return true;
+
+            default:
+                // Don't consume the event.
+                return super.onOptionsItemSelected(menuItem);
+        }
+    }
+
+    // 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();
+
+        // Run the commands that correspond to the selected menu item.
+        switch (menuItemId) {
+            case R.id.close_tab:
+                // Get a handle for the tab layout.
+                TabLayout tabLayout = findViewById(R.id.tablayout);
+
+                // Get the current tab number.
+                int currentTabNumber = tabLayout.getSelectedTabPosition();
+
+                // Delete the current tab.
+                tabLayout.removeTabAt(currentTabNumber);
+
+                // Delete the current page.
+                webViewPagerAdapter.deletePage(currentTabNumber);
                 break;
 
-            case 50:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
+            case R.id.clear_and_exit:
+                // Close the bookmarks cursor and database.
+                bookmarksCursor.close();
+                bookmarksDatabaseHelper.close();
+
+                // Get a handle for the shared preferences.
+                SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+                // Get the status of the clear everything preference.
+                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+
+                // 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();
+                    }
+
+                    // 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 = privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
+                        Process deleteCookiesJournalProcess = privacyBrowserRuntime.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.
+                    }
+                }
+
+                // Clear DOM storage.
+                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
+                    // Ask `WebStorage` to clear the DOM storage.
+                    WebStorage webStorage = WebStorage.getInstance();
+                    webStorage.deleteAllData();
+
+                    // Manually delete the DOM storage files and directories, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+                    try {
+                        // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                        Process deleteLocalStorageProcess = privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
+
+                        // Multiple commands must be used because `Runtime.exec()` does not like `*`.
+                        Process deleteIndexProcess = privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
+                        Process deleteQuotaManagerProcess = privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
+                        Process deleteQuotaManagerJournalProcess = privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
+                        Process deleteDatabaseProcess = privacyBrowserRuntime.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.
+                    }
+                }
+
+                // Clear form data if the API < 26.
+                if ((Build.VERSION.SDK_INT < 26) && (clearEverything || sharedPreferences.getBoolean("clear_form_data", true))) {
+                    WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
+                    webViewDatabase.clearFormData();
+
+                    // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+                    try {
+                        // A string array must be used because the database contains a space and `Runtime.exec` will not otherwise escape the string correctly.
+                        Process deleteWebDataProcess = privacyBrowserRuntime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
+                        Process deleteWebDataJournalProcess = privacyBrowserRuntime.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.
+                    }
+                }
+
+                // 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);
+
+                        // Get the fragment view.
+                        View fragmentView = webViewTabFragment.getView();
+
+                        // 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 = privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+
+                        // Delete the secondary `Service Worker` cache directory.
+                        // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                        Process deleteServiceWorkerProcess = privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
+
+                        // Wait until the processes have finished.
+                        deleteCacheProcess.waitFor();
+                        deleteServiceWorkerProcess.waitFor();
+                    } catch (Exception exception) {
+                        // Do nothing if an error is thrown.
+                    }
+                }
+
+                // Wipe out 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 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);
+
+                        // Clear SSL certificate preferences for this WebView.
+                        nestedScrollWebView.clearSslPreferences();
+
+                        // Clear the back/forward history for this WebView.
+                        nestedScrollWebView.clearHistory();
+
+                        // Destroy the internal state of `mainWebView`.
+                        nestedScrollWebView.destroy();
+                    }
+                }
+
+                // Clear the formatted URL string.
+                formattedUrlString = null;
+
+                // Clear the custom headers.
+                customHeaders.clear();
+
+                // 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 = privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
+
+                        // Wait until the process has finished.
+                        deleteAppWebviewProcess.waitFor();
+                    } catch (Exception exception) {
+                        // Do nothing if an error is thrown.
+                    }
+                }
+
+                // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    finishAndRemoveTask();
+                } else {
+                    finish();
+                }
+
+                // Remove the terminated program from RAM.  The status code is `0`.
+                System.exit(0);
                 break;
 
-            case 75:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
+            case R.id.home:
+                loadUrl(homepage);
                 break;
 
-            case 100:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+            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 = "";
+
+                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
+                    navigatingHistory = true;
+
+                    // Load the previous website in the history.
+                    currentWebView.goBack();
+                }
                 break;
 
-            case 125:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
+            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 = "";
+
+                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
+                    navigatingHistory = true;
+
+                    // Load the next website in the history.
+                    currentWebView.goForward();
+                }
                 break;
 
-            case 150:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
+            case R.id.history:
+                // Get the `WebBackForwardList`.
+                WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
+
+                // 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;
 
-            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);
+            case R.id.requests:
+                // Populate the resource requests.
+                RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
+
+                // Create an intent to launch the Requests activity.
+                Intent requestsIntent = new Intent(this, RequestsActivity.class);
+
+                // Add the block third-party requests status to the intent.
+                requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+
+                // Make it so.
+                startActivity(requestsIntent);
                 break;
 
-            case 200:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
+            case R.id.downloads:
+                // Launch the system Download Manager.
+                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+
+                // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
+                downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+                startActivity(downloadManagerIntent);
                 break;
 
-            default:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+            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.
+
+                // 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();
+
+                // Launch the domains activity.
+                Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                startActivity(domainsIntent);
                 break;
-        }
 
-        // Set the font size title and select the current size menu item.
-        fontSizeMenuItem.setTitle(fontSizeTitle);
-        selectedFontSizeMenuItem.setChecked(true);
+            case R.id.settings:
+                // Set the flag to reapply app settings on restart when returning from Settings.
+                reapplyAppSettingsOnRestart = true;
 
-        // Run all the other default commands.
-        super.onPrepareOptionsMenu(menu);
+                // Set the flag to reapply the domain settings on restart when returning from Settings.
+                reapplyDomainSettingsOnRestart = true;
+                currentWebView.resetCurrentDomainName();  // TODO.  Do this for all tabs.
 
-        // Display the menu.
+                // Launch the settings activity.
+                Intent settingsIntent = new Intent(this, SettingsActivity.class);
+                startActivity(settingsIntent);
+                break;
+
+            case R.id.import_export:
+                // Launch the import/export activity.
+                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
+                startActivity(importExportIntent);
+                break;
+
+            case R.id.logcat:
+                // Launch the logcat activity.
+                Intent logcatIntent = new Intent(this, LogcatActivity.class);
+                startActivity(logcatIntent);
+                break;
+
+            case R.id.guide:
+                // Launch `GuideActivity`.
+                Intent guideIntent = new Intent(this, GuideActivity.class);
+                startActivity(guideIntent);
+                break;
+
+            case R.id.about:
+                // Launch `AboutActivity`.
+                Intent aboutIntent = new Intent(this, AboutActivity.class);
+                startActivity(aboutIntent);
+                break;
+        }
+
+        // Get a handle for the drawer layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+
+        // Close the navigation drawer.
+        drawerLayout.closeDrawer(GravityCompat.START);
         return true;
     }
 
     @Override
-    // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
-    @SuppressLint("SetJavaScriptEnabled")
-    // removeAllCookies is deprecated, but it is required for API < 21.
-    @SuppressWarnings("deprecation")
-    public boolean onOptionsItemSelected(MenuItem menuItem) {
-        // Get the selected menu item ID.
-        int menuItemId = menuItem.getItemId();
+    public void onPostCreate(Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onPostCreate(savedInstanceState);
 
-        // Set the commands that relate to the menu entries.
-        switch (menuItemId) {
-            case R.id.toggle_javascript:
-                // Switch the status of javaScriptEnabled.
-                javaScriptEnabled = !javaScriptEnabled;
+        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
+        actionBarDrawerToggle.syncState();
+    }
 
-                // Apply the new JavaScript status.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        // Run the default commands.
+        super.onConfigurationChanged(newConfig);
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-                // 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();
-                }
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
+
+        // Recalculate the drawer header padding.
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
+
+        // 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));
+        }
+
+        // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
+        // https://code.google.com/p/android/issues/detail?id=20493#c8
+        // ActivityCompat.invalidateOptionsMenu(this);
+    }
+
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
+        // Store the `HitTestResult`.
+        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
+
+        // Create strings.
+        final String imageUrl;
+        final String linkUrl;
+
+        // Get a handle for the the clipboard and fragment managers.
+        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+        FragmentManager fragmentManager = getSupportFragmentManager();
+
+        // Remove the lint errors below that `clipboardManager` might be `null`.
+        assert clipboardManager != null;
+
+        switch (hitTestResult.getType()) {
+            // `SRC_ANCHOR_TYPE` is a link.
+            case WebView.HitTestResult.SRC_ANCHOR_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
+
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
+
+                // Add a Load URL entry.
+                menu.add(R.string.load_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    loadUrl(linkUrl);
+                    return false;
+                });
+
+                // Add a Copy URL entry.
+                menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Save the link URL in a `ClipData`.
+                    ClipData srcAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
+
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
+                    return false;
+                });
+
+                // 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;
+
+                            // 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);
+
+                                // 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);
+
+                            // Show the download file alert dialog.
+                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
+                    return false;
+                });
+
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(linkUrl);
+                    return false;
+                });
+
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(linkUrl);
+                    return false;
+                });
+
+                // Add a Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
+
+            case WebView.HitTestResult.EMAIL_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
+
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
+
+                // Add a Write Email entry.
+                menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
+                    // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
+                    Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
+
+                    // Parse the url and set it as the data for the `Intent`.
+                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
+
+                    // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
+                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+                    // Make it so.
+                    startActivity(emailIntent);
+                    return 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);
+
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
+                    return false;
+                });
+
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
+                break;
+
+            // `IMAGE_TYPE` is an image.
+            case WebView.HitTestResult.IMAGE_TYPE:
+                // Get the image URL.
+                imageUrl = hitTestResult.getExtra();
+
+                // Set the image URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(imageUrl);
+
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
+                    loadUrl(imageUrl);
+                    return false;
+                });
+
+                // 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 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);
+
+                                // 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);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
+                    return false;
+                });
 
-            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 = "";
+                // 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);
 
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcImageTypeClipData);
+                    return false;
+                });
 
-                    // 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);
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(imageUrl);
+                    return false;
+                });
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                } else {  // Add a new domain.
-                    // Apply the new domain settings on returning to `MainWebViewActivity`.
-                    reapplyDomainSettingsOnRestart = true;
-                    currentDomainName = "";
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(imageUrl);
+                    return false;
+                });
 
-                    // Get the current domain
-                    Uri currentUri = Uri.parse(formattedUrlString);
-                    String currentDomain = currentUri.getHost();
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
+                break;
 
-                    // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
-                    DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
 
-                    // Create the domain and store the database ID.
-                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
+            // `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 an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                // Set the image URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(imageUrl);
 
-                    // 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);
+                // Add a `View Image` entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
+                    loadUrl(imageUrl);
+                    return false;
+                });
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                }
-                return true;
+                // 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;
 
-            case R.id.toggle_first_party_cookies:
-                // Switch the status of firstPartyCookiesEnabled.
-                firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
+                            // 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);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(firstPartyCookiesEnabled);
+                                // 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);
 
-                // Apply the new cookie status.
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
+                    return false;
+                });
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(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);
 
-                // 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();
-                }
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
+                    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(imageUrl);
+                    return false;
+                });
 
-            case R.id.toggle_third_party_cookies:
-                if (Build.VERSION.SDK_INT >= 21) {
-                    // Switch the status of thirdPartyCookiesEnabled.
-                    thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(imageUrl);
+                    return false;
+                });
 
-                    // Update the menu checkbox.
-                    menuItem.setChecked(thirdPartyCookiesEnabled);
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
+                break;
+        }
+    }
 
-                    // Apply the new cookie status.
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
+    @Override
+    public void onCreateBookmark(DialogFragment dialogFragment) {
+        // 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);
 
-                    // 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();
-                    }
+        // Extract the strings from the edit texts.
+        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 
-                    // Reload the WebView.
-                    mainWebView.reload();
-                } // Else do nothing because SDK < 21.
-                return true;
+        // Get a copy of the favorite icon bitmap.
+        Bitmap favoriteIcon = favoriteIconBitmap;
 
-            case R.id.toggle_dom_storage:
-                // Switch the status of domStorageEnabled.
-                domStorageEnabled = !domStorageEnabled;
+        // Scale the favorite icon bitmap down if it is larger than 256 x 256.  Filtering uses bilinear interpolation.
+        if ((favoriteIcon.getHeight() > 256) || (favoriteIcon.getWidth() > 256)) {
+            favoriteIcon = Bitmap.createScaledBitmap(favoriteIcon, 256, 256, true);
+        }
 
-                // Update the menu checkbox.
-                menuItem.setChecked(domStorageEnabled);
+        // Create a favorite icon byte array output stream.
+        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // Apply the new DOM Storage status.
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
+        // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+        favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+        // Convert the favorite icon byte array stream to a byte array.
+        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
-                // 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();
-                }
+        // Display the new bookmark below the current items in the (0 indexed) list.
+        int newBookmarkDisplayOrder = bookmarksListView.getCount();
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Create the bookmark.
+        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 
-            // Form data can be removed once the minimum API >= 26.
-            case R.id.toggle_save_form_data:
-                // Switch the status of saveFormDataEnabled.
-                saveFormDataEnabled = !saveFormDataEnabled;
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(saveFormDataEnabled);
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-                // Apply the new form data status.
-                mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
+        // Scroll to the new bookmark.
+        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+    }
 
-                // Display a `Snackbar`.
-                if (saveFormDataEnabled) {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
-                } else {
-                    Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
-                }
+    @Override
+    public void onCreateBookmarkFolder(DialogFragment dialogFragment) {
+        // 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);
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+        // Get new folder name string.
+        String folderNameString = createFolderNameEditText.getText().toString();
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Create a folder icon bitmap.
+        Bitmap folderIconBitmap;
 
-            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;
+        // 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();
 
-                                    // 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;
+            // Convert the folder icon drawable to a bitmap drawable.
+            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-            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;
+            // Convert the folder icon bitmap drawable to a bitmap.
+            folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+        } else {  // Use the WebView favorite icon.
+            // Get a copy of the favorite icon bitmap.
+            folderIconBitmap = favoriteIconBitmap;
 
-                                    // The `Snackbar` was dismissed without the `Undo` button being pushed.
-                                    default:
-                                        // Delete the DOM Storage.
-                                        WebStorage webStorage = WebStorage.getInstance();
-                                        webStorage.deleteAllData();
+            // Scale the folder icon bitmap down if it is larger than 256 x 256.  Filtering uses bilinear interpolation.
+            if ((folderIconBitmap.getHeight() > 256) || (folderIconBitmap.getWidth() > 256)) {
+                folderIconBitmap = Bitmap.createScaledBitmap(folderIconBitmap, 256, 256, true);
+            }
+        }
 
-                                        // Initialize a handler to manually delete the DOM storage files and directories.
-                                        Handler deleteDomStorageHandler = new Handler();
+        // Create a folder icon byte array output stream.
+        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                                        // 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/"});
+        // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+        folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 
-                                                // Multiple commands must be used because `Runtime.exec()` does not like `*`.
-                                                privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
-                                                privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
-                                                privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
-                                                privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
-                                            } catch (IOException e) {
-                                                // Do nothing if an error is thrown.
-                                            }
-                                        };
+        // Convert the folder icon byte array stream to a byte array.
+        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 
-                                        // Manually delete the DOM storage files after 200 milliseconds.
-                                        deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+        // 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);
+        }
 
-            // 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;
+        // Create the folder, which will be placed at the top of the `ListView`.
+        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
 
-                                    // 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;
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-            case R.id.easylist:
-                // Toggle the EasyList status.
-                easyListEnabled = !easyListEnabled;
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(easyListEnabled);
+        // Scroll to the new folder.
+        bookmarksListView.setSelection(0);
+    }
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+    @Override
+    public void onSaveBookmark(DialogFragment 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);
 
-            case R.id.easyprivacy:
-                // Toggle the EasyPrivacy status.
-                easyPrivacyEnabled = !easyPrivacyEnabled;
+        // Store the bookmark strings.
+        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(easyPrivacyEnabled);
+        // 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.
+            // Get a copy of the favorite icon bitmap.
+            Bitmap favoriteIcon = favoriteIconBitmap;
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+            // Scale the favorite icon bitmap down if it is larger than 256 x 256.  Filtering uses bilinear interpolation.
+            if ((favoriteIcon.getHeight() > 256) || (favoriteIcon.getWidth() > 256)) {
+                favoriteIcon = Bitmap.createScaledBitmap(favoriteIcon, 256, 256, true);
+            }
 
-            case R.id.fanboys_annoyance_list:
-                // Toggle Fanboy's Annoyance List status.
-                fanboysAnnoyanceListEnabled = !fanboysAnnoyanceListEnabled;
+            // Create a favorite icon byte array output stream.
+            ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(fanboysAnnoyanceListEnabled);
+            // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
 
-                // Update the staus of Fanboy's Social Blocking List.
-                MenuItem fanboysSocialBlockingListMenuItem = mainMenu.findItem(R.id.fanboys_social_blocking_list);
-                fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+            //  Update the bookmark and the favorite icon.
+            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+        }
 
-            case R.id.fanboys_social_blocking_list:
-                // Toggle Fanboy's Social Blocking List status.
-                fanboysSocialBlockingListEnabled = !fanboysSocialBlockingListEnabled;
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(fanboysSocialBlockingListEnabled);
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+    @Override
+    public void onSaveBookmarkFolder(DialogFragment 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 defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
 
-            case R.id.ultraprivacy:
-                // Toggle the UltraPrivacy status.
-                ultraPrivacyEnabled = !ultraPrivacyEnabled;
+        // Get the new folder name.
+        String newFolderNameString = editFolderNameEditText.getText().toString();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(ultraPrivacyEnabled);
+        // Check if the favorite icon has changed.
+        if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
+            // Update the name in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
+        } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
+            // Create the new folder icon Bitmap.
+            Bitmap folderIconBitmap;
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+            // Populate the new folder icon bitmap.
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable.
+                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 
-            case R.id.block_all_third_party_requests:
-                //Toggle the third-party requests blocker status.
-                blockAllThirdPartyRequests = !blockAllThirdPartyRequests;
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(blockAllThirdPartyRequests);
+                // Convert the folder icon bitmap drawable to a bitmap.
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {  // Use the `WebView` favorite icon.
+                // Get a copy of the favorite icon bitmap.
+                folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
+                // Scale the folder icon bitmap down if it is larger than 256 x 256.  Filtering uses bilinear interpolation.
+                if ((folderIconBitmap.getHeight() > 256) || (folderIconBitmap.getWidth() > 256)) {
+                    folderIconBitmap = Bitmap.createScaledBitmap(folderIconBitmap, 256, 256, true);
+                }
+            }
 
-            case R.id.user_agent_privacy_browser:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+            // 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);
 
-            case R.id.user_agent_webview_default:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString("");
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+            // 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();
 
-            case R.id.user_agent_firefox_on_android:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Convert the folder icon bitmap drawable to a bitmap.
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {  // Use the `WebView` favorite icon.
+                // Get a copy of the favorite icon bitmap.
+                folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 
-            case R.id.user_agent_chrome_on_android:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
+                // Scale the folder icon bitmap down if it is larger than 256 x 256.  Filtering uses bilinear interpolation.
+                if ((folderIconBitmap.getHeight() > 256) || (folderIconBitmap.getWidth() > 256)) {
+                    folderIconBitmap = Bitmap.createScaledBitmap(folderIconBitmap, 256, 256, true);
+                }
+            }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-            case R.id.user_agent_safari_on_ios:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
+            // 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);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-            case R.id.user_agent_firefox_on_linux:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
+            // Update the folder name and icon in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
+        }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-            case R.id.user_agent_chromium_on_linux:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+    @Override
+    public void onCloseDownloadLocationPermissionDialog(int downloadType) {
+        switch (downloadType) {
+            case DownloadLocationPermissionDialog.DOWNLOAD_FILE:
+                // Request the WRITE_EXTERNAL_STORAGE permission with a file request code.
+                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
+                break;
 
-            case R.id.user_agent_firefox_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
+            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;
+        }
+    }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        // Get a handle for the fragment manager.
+        FragmentManager fragmentManager = getSupportFragmentManager();
 
-            case R.id.user_agent_chrome_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
+        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);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // 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));
+                }
 
-            case R.id.user_agent_edge_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
+                // Reset the download variables.
+                downloadUrl = "";
+                downloadContentDisposition = "";
+                downloadContentLength = 0;
+                break;
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+            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);
 
-            case R.id.user_agent_internet_explorer_on_windows:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
+                // 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));
+                }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Reset the image URL variable.
+                downloadImageUrl = "";
+                break;
+        }
+    }
 
-            case R.id.user_agent_safari_on_macos:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
+    @Override
+    public void onDownloadImage(DialogFragment dialogFragment, String imageUrl) {
+        // Download the image if it has an HTTP or HTTPS URI.
+        if (imageUrl.startsWith("http")) {
+            // Get a handle for the system `DOWNLOAD_SERVICE`.
+            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+            // Parse `imageUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
 
-            case R.id.user_agent_custom:
-                // Update the user agent.
-                mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
+            // 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);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
+                downloadRequest.addRequestHeader("Cookie", cookies);
+            }
 
-            case R.id.font_size_twenty_five_percent:
-                mainWebView.getSettings().setTextZoom(25);
-                return true;
+            // Get the file name from the dialog fragment.
+            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
+            String imageName = downloadImageNameEditText.getText().toString();
 
-            case R.id.font_size_fifty_percent:
-                mainWebView.getSettings().setTextZoom(50);
-                return true;
+            // 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);
+            }
 
-            case R.id.font_size_seventy_five_percent:
-                mainWebView.getSettings().setTextZoom(75);
-                return true;
+            // Allow `MediaScanner` to index the download if it is a media file.
+            downloadRequest.allowScanningByMediaScanner();
 
-            case R.id.font_size_one_hundred_percent:
-                mainWebView.getSettings().setTextZoom(100);
-                return true;
+            // Add the URL as the description for the download.
+            downloadRequest.setDescription(imageUrl);
 
-            case R.id.font_size_one_hundred_twenty_five_percent:
-                mainWebView.getSettings().setTextZoom(125);
-                return true;
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
 
-            case R.id.font_size_one_hundred_fifty_percent:
-                mainWebView.getSettings().setTextZoom(150);
-                return true;
+            // Remove the lint warning below that `downloadManager` might be `null`.
+            assert downloadManager != null;
 
-            case R.id.font_size_one_hundred_seventy_five_percent:
-                mainWebView.getSettings().setTextZoom(175);
-                return true;
+            // 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();
+        }
+    }
 
-            case R.id.font_size_two_hundred_percent:
-                mainWebView.getSettings().setTextZoom(200);
-                return true;
+    @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);
 
-            case R.id.swipe_to_refresh:
-                // Toggle swipe to refresh.
-                swipeRefreshLayout.setEnabled(!swipeRefreshLayout.isEnabled());
-                return true;
+            // Parse `downloadUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
 
-            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;
+            // 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 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();
 
-            case R.id.night_mode:
-                // Toggle night mode.
-                nightMode = !nightMode;
+            // 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);
+            }
 
-                // 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);
+            // Allow `MediaScanner` to index the download if it is a media file.
+            downloadRequest.allowScanningByMediaScanner();
 
-                    // Get the JavaScript preference.
-                    javaScriptEnabled = sharedPreferences.getBoolean("javascript", false);
-                }
+            // Add the URL as the description for the download.
+            downloadRequest.setDescription(downloadUrl);
 
-                // Apply the JavaScript setting to the WebView.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
 
-                // Update the privacy icons.
-                updatePrivacyIcons(false);
+            // Remove the lint warning below that `downloadManager` might be `null`.
+            assert downloadManager != null;
 
-                // Reload the website.
-                mainWebView.reload();
-                return true;
+            // 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();
+        }
+    }
 
-            case R.id.print:
-                // Get a `PrintManager` instance.
-                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
+    @Override
+    public void onHttpAuthenticationCancel() {
+        // Cancel the `HttpAuthHandler`.
+        httpAuthHandler.cancel();
+    }
 
-                // Convert `mainWebView` to `printDocumentAdapter`.
-                PrintDocumentAdapter printDocumentAdapter = mainWebView.createPrintDocumentAdapter();
+    @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);
 
-                // Remove the lint error below that `printManager` might be `null`.
-                assert printManager != null;
+        // Proceed with the HTTP authentication.
+        httpAuthHandler.proceed(usernameEditText.getText().toString(), passwordEditText.getText().toString());
+    }
 
-                // Print the document.  The print attributes are `null`.
-                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
-                return true;
+    @Override
+    public void onSslErrorCancel() {  // TODO.  How to handle this with multiple tabs?  There could be multiple errors at once.
+        sslErrorHandler.cancel();
+    }
 
-            case R.id.view_source:
-                // Launch the View Source activity.
-                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
-                startActivity(viewSourceIntent);
-                return true;
+    @Override
+    public void onSslErrorProceed() {  // TODO.  How to handle this with multiple tabs?  There could be multiple errors at once.
+        sslErrorHandler.proceed();
+    }
 
-            case R.id.proxy_through_orbot:
-                // Toggle the proxy through Orbot variable.
-                proxyThroughOrbot = !proxyThroughOrbot;
+    @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.
 
-                // Apply the proxy through Orbot settings.
-                applyProxyThroughOrbot(true);
-                return true;
+            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
+            navigatingHistory = true;  // TODO.
 
-            case R.id.share:
-                // Setup the share string.
-                String shareString = webViewTitle + " – " + urlTextBox.getText().toString();
+            // Go back.
+            currentWebView.goBack();
+        } else {  // There are no pages to go back to.
+            // Load a blank page
+            loadUrl("");
+        }
+    }
 
-                // Create the share intent.
-                Intent shareIntent = new Intent(Intent.ACTION_SEND);
-                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
-                shareIntent.setType("text/plain");
+    @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);
+    }
 
-                // Make it so.
-                startActivity(Intent.createChooser(shareIntent, "Share URL"));
-                return 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 = "";
 
-            case R.id.find_on_page:
-                // Hide the URL app bar.
-                supportAppBar.setVisibility(View.GONE);
+        // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
+        navigatingHistory = true;
 
-                // Show the Find on Page `RelativeLayout`.
-                findOnPageLinearLayout.setVisibility(View.VISIBLE);
+        // Load the history entry.
+        currentWebView.goBackOrForward(moveBackOrForwardSteps);
+    }
 
-                // 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();
+    @Override
+    public void onClearHistory() {
+        // Clear the history.
+        currentWebView.clearHistory();
+    }
 
-                    // Display the keyboard.  `0` sets no input flags.
-                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
-                }, 200);
-                return true;
+    // 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);
 
-            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));
+        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);
 
-                //Everything else will be handled by `CreateHomeScreenShortcutDialog` and the associated listener below.
-                return true;
+                // Load the new folder.
+                loadBookmarksFolder();
+            }
 
-            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;
+        } 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 = "";
 
-            case R.id.ad_consent:
-                // Display the ad consent dialog.
-                DialogFragment adConsentDialogFragment = new AdConsentDialog();
-                adConsentDialogFragment.show(getFragmentManager(), getString(R.string.ad_consent));
-                return true;
+            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
+            navigatingHistory = true;
 
-            default:
-                // Don't consume the event.
-                return super.onOptionsItemSelected(menuItem);
+            // Go back.
+            currentWebView.goBack();
+        } else {  // There isn't anything to do in Privacy Browser.
+            // Pass `onBackPressed()` to the system.
+            super.onBackPressed();
         }
     }
 
-    // removeAllCookies is deprecated, but it is required for API < 21.
-    @SuppressWarnings("deprecation")
+    // 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 boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
-        int menuItemId = menuItem.getItemId();
-
-        switch (menuItemId) {
-            case R.id.home:
-                loadUrl(homepage);
-                break;
-
-            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 = "";
+    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));
+        }
+    }
 
-                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-                    navigatingHistory = true;
+    private void loadUrlFromTextBox() {
+        // Get a handle for the URL edit text.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
-                    // Load the previous website in the history.
-                    mainWebView.goBack();
-                }
-                break;
+        // 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();
 
-            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 = "";
+        // 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;
+            }
 
-                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-                    navigatingHistory = true;
+            // Initialize `unformattedUrl`.
+            URL unformattedUrl = null;
 
-                    // Load the next website in the history.
-                    mainWebView.goForward();
-                }
-                break;
+            // 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();
+            }
 
-            case R.id.history:
-                // Get the `WebBackForwardList`.
-                WebBackForwardList webBackForwardList = mainWebView.copyBackForwardList();
+            // 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;
 
-                // 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;
+            // Build the URI.
+            Uri.Builder formattedUri = new Uri.Builder();
+            formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
 
-            case R.id.requests:
-                // Launch the requests activity.
-                Intent requestsIntent = new Intent(this, RequestsActivity.class);
-                startActivity(requestsIntent);
-                break;
+            // 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;
 
-            case R.id.downloads:
-                // Launch the system Download Manager.
-                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+            // Sanitize the search input.
+            try {
+                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                encodedUrlString = "";
+            }
 
-                // 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);
+            // Add the base search URL.
+            formattedUrlString = searchURL + encodedUrlString;
+        }
 
-                startActivity(downloadManagerIntent);
-                break;
+        // 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();
 
-            case R.id.domains:
-                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
-                reapplyDomainSettingsOnRestart = true;
-                currentDomainName = "";
+        // Make it so.
+        loadUrl(formattedUrlString);
+    }
 
-                // Launch the domains activity.
-                Intent domainsIntent = new Intent(this, DomainsActivity.class);
-                startActivity(domainsIntent);
-                break;
+    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;
 
-            case R.id.settings:
-                // Set the flag to reapply app settings on restart when returning from Settings.
-                reapplyAppSettingsOnRestart = true;
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, url, true, false);
 
-                // Set the flag to reapply the domain settings on restart when returning from Settings.
-                reapplyDomainSettingsOnRestart = true;
-                currentDomainName = "";
+        // Load the URL.
+        currentWebView.loadUrl(url, customHeaders);
+    }
 
-                // Launch the settings activity.
-                Intent settingsIntent = new Intent(this, SettingsActivity.class);
-                startActivity(settingsIntent);
-                break;
+    public void findPreviousOnPage(View view) {
+        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
+        currentWebView.findNext(false);
+    }
 
-            case R.id.import_export:
-                // Launch the import/export activity.
-                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
-                startActivity(importExportIntent);
-                break;
+    public void findNextOnPage(View view) {
+        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
+        currentWebView.findNext(true);
+    }
 
-            case R.id.guide:
-                // Launch `GuideActivity`.
-                Intent guideIntent = new Intent(this, GuideActivity.class);
-                startActivity(guideIntent);
-                break;
+    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);
 
-            case R.id.about:
-                // Launch `AboutActivity`.
-                Intent aboutIntent = new Intent(this, AboutActivity.class);
-                startActivity(aboutIntent);
-                break;
+        // Delete the contents of `find_on_page_edittext`.
+        findOnPageEditText.setText(null);
 
-            case R.id.clearAndExit:
-                // Close the bookmarks cursor and database.
-                bookmarksCursor.close();
-                bookmarksDatabaseHelper.close();
+        // Clear the highlighted phrases.
+        currentWebView.clearMatches();
 
-                // Get a handle for `sharedPreferences`.  `this` references the current context.
-                SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        // Hide the find on page linear layout.
+        findOnPageLinearLayout.setVisibility(View.GONE);
 
-                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+        // Show the toolbar.
+        toolbar.setVisibility(View.VISIBLE);
 
-                // 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();
-                    }
+        // Hide the keyboard.
+        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+    }
 
-                    // 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.
-                    }
-                }
+    private void applyAppSettings() {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                // Clear DOM storage.
-                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
-                    // Ask `WebStorage` to clear the DOM storage.
-                    WebStorage webStorage = WebStorage.getInstance();
-                    webStorage.deleteAllData();
+        // 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);
 
-                    // 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/"});
+        // 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();
 
-                        // 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.
-                    }
-                }
+        // Remove the incorrect lint warnings below that the action bar might be null.
+        assert actionBar != null;
 
-                // Clear form data if the API < 26.
-                if ((Build.VERSION.SDK_INT < 26) && (clearEverything || sharedPreferences.getBoolean("clear_form_data", true))) {
-                    WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
-                    webViewDatabase.clearFormData();
+        // Apply the proxy through Orbot settings.
+        applyProxyThroughOrbot(false);
 
-                    // 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.
-                    }
-                }
+        // Set Do Not Track status.
+        if (doNotTrackEnabled) {
+            customHeaders.put("DNT", "1");
+        } else {
+            customHeaders.remove("DNT");
+        }
 
-                // Clear the cache.
-                if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
-                    // `true` includes disk files.
-                    mainWebView.clearCache(true);
+        // 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);
 
-                    // Manually delete the cache directories.
-                    try {
-                        // Delete the main cache directory.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-                        // 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.
-                    }
-                }
+            // 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);
 
-                // Clear SSL certificate preferences.
-                mainWebView.clearSslPreferences();
+                // Set the app bar scrolling.
+                nestedScrollWebView.setNestedScrollingEnabled(sharedPreferences.getBoolean("scroll_app_bar", true));
+            }
+        }
 
-                // Clear the back/forward history.
-                mainWebView.clearHistory();
+        // 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();
+            }
 
-                // Clear `formattedUrlString`.
-                formattedUrlString = null;
+            // Hide the banner ad in the free flavor.
+            if (BuildConfig.FLAVOR.contentEquals("free")) {
+                AdHelper.hideAd(findViewById(R.id.adview));
+            }
 
-                // Clear `customHeaders`.
-                customHeaders.clear();
+            // 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);
 
-                // Detach all views from `mainWebViewRelativeLayout`.
-                mainWebViewRelativeLayout.removeAllViews();
+            /* 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;
 
-                // Destroy the internal state of `mainWebView`.
-                mainWebView.destroy();
+            // Show the app bar.
+            actionBar.show();
 
-                // 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.
-                    }
-                }
+            // 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));
+            }
 
-                // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    finishAndRemoveTask();
-                } else {
-                    finish();
-                }
+            // Remove the `SYSTEM_UI` flags from the root frame layout.
+            rootFrameLayout.setSystemUiVisibility(0);
 
-                // Remove the terminated program from RAM.  The status code is `0`.
-                System.exit(0);
-                break;
+            // Add the translucent status flag.
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
         }
-
-        // Close the navigation drawer.
-        drawerLayout.closeDrawer(GravityCompat.START);
-        return true;
     }
 
-    @Override
-    public void onPostCreate(Bundle savedInstanceState) {
-        super.onPostCreate(savedInstanceState);
 
-        // Sync the state of the DrawerToggle after onRestoreInstanceState has finished.
-        drawerToggle.syncState();
-    }
+    // `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);
 
-    @Override
-    public void onConfigurationChanged(Configuration newConfig) {
-        super.onConfigurationChanged(newConfig);
+        // Store a copy of the current user agent to track changes for the return boolean.
+        String initialUserAgent = nestedScrollWebView.getSettings().getUserAgentString();
 
-        // 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));
+        // 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 = "";
         }
 
-        // `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);
-    }
+        // 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);
 
-    @Override
-    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
-        // Store the `HitTestResult`.
-        final WebView.HitTestResult hitTestResult = mainWebView.getHitTestResult();
+            // Reset the ignoring of pinned domain information.
+            nestedScrollWebView.setIgnorePinnedDomainInformation(false);
 
-        // Create strings.
-        final String imageUrl;
-        final String linkUrl;
+            // Clear any pinned SSL certificate or IP addresses.
+            nestedScrollWebView.clearPinnedSslCertificate();
+            nestedScrollWebView.clearPinnedIpAddresses();
 
-        // Get a handle for the `ClipboardManager`.
-        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+            // Reset the favorite icon if specified.
+            if (resetFavoriteIcon) {
+                // Store the favorite icon bitmap.
+                favoriteIconBitmap = favoriteIconDefaultBitmap;  // TODO.
 
-        // Remove the lint errors below that `clipboardManager` might be `null`.
-        assert clipboardManager != null;
+                // Get a handle for the tab layout.
+                TabLayout tabLayout = findViewById(R.id.tablayout);
 
-        switch (hitTestResult.getType()) {
-            // `SRC_ANCHOR_TYPE` is a link.
-            case WebView.HitTestResult.SRC_ANCHOR_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
+                // 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.
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+                // Remove the warning below that the current tab might be null.
+                assert currentTab != null;
 
-                // Add a Load URL entry.
-                menu.add(R.string.load_url).setOnMenuItemClickListener((MenuItem item) -> {
-                    loadUrl(linkUrl);
-                    return false;
-                });
+                // Get the current tab custom view.
+                View currentTabCustomView = currentTab.getCustomView();
 
-                // 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);
+                // Remove the warning below that the current tab custom view might be null.
+                assert currentTabCustomView != null;
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
-                    return false;
-                });
+                // Get the current tab favorite icon image view.
+                ImageView currentTabFavoriteIconImageView = currentTabCustomView.findViewById(R.id.favorite_icon_imageview);
 
-                // 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 the default favorite icon as the favorite icon for this tab.
+                currentTabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(favoriteIconBitmap, 64, 64, 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);
+            // Get a handle for the swipe refresh layout.
+            SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 
-                                // 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);
+            // 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);
 
-                            // Show the download file alert dialog.
-                            downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+            // Get a full cursor from `domainsDatabaseHelper`.
+            Cursor domainNameCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+            // Initialize `domainSettingsSet`.
+            Set<String> domainSettingsSet = new HashSet<>();
 
-            case WebView.HitTestResult.EMAIL_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
+            // Get the domain name column index.
+            int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+            // 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();
 
-                // 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);
+            // Initialize the domain name in database variable.
+            String domainNameInDatabase = null;
 
-                    // Parse the url and set it as the data for the `Intent`.
-                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
+            // 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;
 
-                    // `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);
+                // 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);
+            }
 
-                    // Make it so.
-                    startActivity(emailIntent);
-                    return 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);
 
-                // 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);
+                    // Store the applied domain names as it appears in the database.
+                    domainNameInDatabase = "*." + newHostName;
+                }
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
-                    return false;
-                });
+                // Strip out the lowest subdomain of of the host name.
+                newHostName = newHostName.substring(newHostName.indexOf(".") + 1);
+            }
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
 
-            // `IMAGE_TYPE` is an image.
-            case WebView.HitTestResult.IMAGE_TYPE:
-                // Get the image URL.
-                imageUrl = hitTestResult.getExtra();
+            // Get a handle for the shared preferences.
+            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+            // 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);
 
-                // Add a `View Image` entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+            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();
 
-                // 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 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)));
+                }
 
-                            // 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 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)));
+                }
 
-                                // 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);
+                // If there is a pinned SSL certificate, store it in the WebView.
+                if (pinnedSslCertificate) {
+                    nestedScrollWebView.setPinnedSslCertificate(pinnedSslIssuedToCName, pinnedSslIssuedToOName, pinnedSslIssuedToUName, pinnedSslIssuedByCName, pinnedSslIssuedByOName, pinnedSslIssuedByUName,
+                            pinnedSslStartDate, pinnedSslEndDate);
+                }
 
-                            // Show the download image alert dialog.
-                            downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+                // If there is a pinned IP address, store it in the WebView.
+                if (pinnedIpAddresses) {
+                    nestedScrollWebView.setPinnedIpAddresses(pinnedHostIpAddresses);
+                }
 
-                // 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 `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;
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageTypeClipData);
-                    return false;
-                });
+                    case DomainsDatabaseHelper.NIGHT_MODE_DISABLED:
+                        nightMode = false;  // TODO.
+                        break;
+                }
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                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);
+                }
 
-            // `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();
+                // Close `currentHostDomainSettingsCursor`.
+                currentDomainSettingsCursor.close();
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+                // Apply the domain settings.
+                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);  //TODO  This could be bad.
+                nestedScrollWebView.getSettings().setDomStorageEnabled(domainDomStorageEnabled);  // TODO.  Move up.
 
-                // Add a `View Image` entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+                // Apply the form data setting if the API < 26.
+                if (Build.VERSION.SDK_INT < 26) {
+                    nestedScrollWebView.getSettings().setSaveFormData(saveFormDataEnabled);
+                }
 
-                // 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;
+                // 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);
+                }
 
-                            // 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 third-party cookies status if API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, domainThirdPartyCookiesEnabled);
+                }
 
-                                // 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);
+                // 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 image alert dialog.
-                            downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+                        // 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;
 
-                // 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);
+                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                                // Set the user agent to `""`, which uses the default value.
+                                nestedScrollWebView.getSettings().setUserAgentString("");
+                                break;
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
-                    return false;
-                });
+                            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;
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                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);
 
-    @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);
+                        switch (userAgentArrayPosition) {
+                            case UNRECOGNIZED_USER_AGENT:  // The user agent name contains a custom user agent.
+                                nestedScrollWebView.getSettings().setUserAgentString(userAgentName);
+                                break;
 
-        // Extract the strings from the `EditTexts`.
-        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
+                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                                // Set the user agent to `""`, which uses the default value.
+                                nestedScrollWebView.getSettings().setUserAgentString("");
+                                break;
 
-        // 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();
+                            default:
+                                // Get the user agent string from the user agent data array.
+                                nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                        }
+                    }
+                }
 
-        // Display the new bookmark below the current items in the (0 indexed) list.
-        int newBookmarkDisplayOrder = bookmarksListView.getCount();
+                // 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;
 
-        // Create the bookmark.
-        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
+                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_ENABLED:
+                        // Enable swipe to refresh.
+                        swipeRefreshLayout.setEnabled(true);
+                        break;
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_DISABLED:
+                        // Disable swipe to refresh.
+                        swipeRefreshLayout.setEnabled(false);
+                }
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+                // Set the loading of webpage images.
+                switch (displayWebpageImagesInt) {
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
+                        break;
 
-        // Scroll to the new bookmark.
-        bookmarksListView.setSelection(newBookmarkDisplayOrder);
-    }
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(true);
+                        break;
 
-    @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);
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(false);
+                        break;
+                }
 
-        // Get new folder name string.
-        String folderNameString = createFolderNameEditText.getText().toString();
+                // 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));
 
-        // 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;
-        }
+                // 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);
+                }
 
-        // 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();
+                // Apply the default settings.
+                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);  // TODO.
+                nestedScrollWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
+                swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
 
-        // 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);
-        }
+                // Apply the form data setting if the API < 26.
+                if (Build.VERSION.SDK_INT < 26) {
+                    currentWebView.getSettings().setSaveFormData(saveFormDataEnabled);
+                }
 
-        // Create the folder, which will be placed at the top of the `ListView`.
-        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
+                // Reset the pinned variables.
+                nestedScrollWebView.setDomainSettingsDatabaseId(-1);
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+                // Set third-party cookies status if API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, defaultThirdPartyCookiesEnabled);
+                }
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+                // 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);
 
-        // Scroll to the new folder.
-        bookmarksListView.setSelection(0);
-    }
+                    // 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;
 
-    @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();
+                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                            // Set the user agent to `""`, which uses the default value.
+                            nestedScrollWebView.getSettings().setUserAgentString("");
+                            break;
 
-        // Convert the favorite icon bitmap to an `Icon`.  `IconCompat` is required until API >= 26.
-        IconCompat favoriteIcon = IconCompat.createWithBitmap(favoriteIconBitmap);
+                        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;
 
-        // Setup the shortcut intent.
-        Intent shortcutIntent = new Intent(Intent.ACTION_VIEW);
-        shortcutIntent.setData(Uri.parse(formattedUrlString));
+                        default:
+                            // Get the user agent string from the user agent data array
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                    }
+                }
 
-        // Create a shortcut info builder.  The shortcut name becomes the shortcut ID.
-        ShortcutInfoCompat.Builder shortcutInfoBuilder = new ShortcutInfoCompat.Builder(this, shortcutNameString);
+                // Set the loading of webpage images.
+                nestedScrollWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
 
-        // Add the required fields to the shortcut info builder.
-        shortcutInfoBuilder.setIcon(favoriteIcon);
-        shortcutInfoBuilder.setIntent(shortcutIntent);
-        shortcutInfoBuilder.setShortLabel(shortcutNameString);
+                // 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));
+            }
 
-        // Request the pin.  `ShortcutManagerCompat` can be switched to `ShortcutManager` once API >= 26.
-        ShortcutManagerCompat.requestPinShortcut(this, shortcutInfoBuilder.build(), null);
-    }
+            // Close the domains database helper.
+            domainsDatabaseHelper.close();
 
-    @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;
+            // Update the privacy icons.
+            updatePrivacyIcons(true);
+        }
 
-            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;
+        // Reload the website if returning from the Domains activity.
+        if (reloadWebsite) {
+            nestedScrollWebView.reload();
         }
+
+        // Return the user agent changed status.
+        return !nestedScrollWebView.getSettings().getUserAgentString().equals(initialUserAgent);
     }
 
-    @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 applyProxyThroughOrbot(boolean reloadWebsite) {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(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(getSupportFragmentManager(), getString(R.string.download)), 500);
-                } else {
-                    downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                }
+        // 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));
 
-                // Reset the download variables.
-                downloadUrl = "";
-                downloadContentDisposition = "";
-                downloadContentLength = 0;
-                break;
+        // Get a handle for the action bar.  `getSupportActionBar()` must be used until the minimum API >= 21.
+        ActionBar actionBar = getSupportActionBar();
 
-            case DOWNLOAD_IMAGE_REQUEST_CODE:
-                // Show the download image alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
-                AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(downloadImageUrl);
+        // Remove the incorrect lint warning later that the action bar might be null.
+        assert actionBar != null;
 
-                // On API 23, displaying the fragment must be delayed or the app will crash.
-                if (Build.VERSION.SDK_INT == 23) {
-                    new Handler().postDelayed(() -> downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download)), 500);
-                } else {
-                    downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-                }
+        // Set the homepage, search, and proxy options.
+        if (proxyThroughOrbot) {  // Set the Tor options.
+            // Set `torHomepageString` as `homepage`.
+            homepage = torHomepageString;
 
-                // Reset the image URL variable.
-                downloadImageUrl = "";
-                break;
-        }
-    }
+            // If formattedUrlString is null assign the homepage to it.
+            if (formattedUrlString == null) {
+                formattedUrlString = homepage;
+            }
 
-    @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);
+            // 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;
+            }
 
-            // Parse `imageUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
+            // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
+            OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
 
-            // 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);
+            // 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));
+            }
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
+            // Check to see if Orbot is ready.
+            if (!orbotStatus.equals("ON")) {  // Orbot is not ready.
+                // Set `waitingForOrbot`.
+                waitingForOrbot = true;
+
+                // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
+                currentWebView.getSettings().setUseWideViewPort(false);
+
+                // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
+                currentWebView.loadData(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;
 
-            // Get the file name from the dialog fragment.
-            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
-            String imageName = downloadImageNameEditText.getText().toString();
+            // If formattedUrlString is null assign the homepage to it.
+            if (formattedUrlString == null) {
+                formattedUrlString = homepage;
+            }
 
-            // 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 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;
             }
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+            // Reset the proxy to default.  The host is `""` and the port is `"0"`.
+            OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(imageUrl);
+            // 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));
+            }
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+            // Reset `waitingForOrbot.
+            waitingForOrbot = false;
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+            // 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);
 
-            // 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();
+                    // Get the fragment view.
+                    View fragmentView = webViewTabFragment.getView();
+
+                    // Only reload the WebViews if they exist.
+                    if (fragmentView != null) {
+                        // Get the nested scroll WebView from the tab fragment.
+                        NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+
+                        // Reload the WebView.
+                        nestedScrollWebView.reload();
+                    }
+                }
+            }
         }
     }
 
-    @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);
-
-            // Parse `downloadUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
+    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);
+            }
 
-            // 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);
+            // 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);
+                }
+            }
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
+            // 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);
+                }
             }
 
-            // Get the file name from the dialog fragment.
-            EditText downloadFileNameEditText = dialogFragment.getDialog().findViewById(R.id.download_file_name);
-            String fileName = downloadFileNameEditText.getText().toString();
+            // Update the refresh icon.
+            if (darkTheme) {
+                refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
+            } else {
+                refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
+            }
 
-            // 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);
+            // `invalidateOptionsMenu` calls `onPrepareOptionsMenu()` and redraws the icons in the `AppBar`.
+            if (runInvalidateOptionsMenu) {
+                invalidateOptionsMenu();
             }
+        }
+    }
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+    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();
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(downloadUrl);
+        // Set the URI and the MIME type.  Specifying `text/html` displays a good number of options.
+        downloadIntent.setDataAndType(Uri.parse(url), "text/html");
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+        // Flag the intent to open in a new task.
+        downloadIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+        // Show the chooser.
+        startActivity(Intent.createChooser(downloadIntent, getString(R.string.open_with)));
+    }
+
+    private void highlightUrlText() {
+        // Get a handle for the URL edit text.
+        EditText urlEditText = findViewById(R.id.url_edittext);
+
+        // Only highlight the URL text if the box is not currently selected.
+        if (!urlEditText.hasFocus()) {
+            // Get the URL string.
+            String urlString = urlEditText.getText().toString();
+
+            // Highlight the URL according to the protocol.
+            if (urlString.startsWith("file://")) {  // 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;
+                }
 
-            // 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();
-        }
-    }
+                // Get the index of the last `.` in the domain.
+                int lastDotIndex = baseUrl.lastIndexOf(".");
 
-    @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);
+                // Get the index of the penultimate `.` in the domain.
+                int penultimateDotIndex = baseUrl.lastIndexOf(".", lastDotIndex - 1);
 
-        // Store the bookmark strings.
-        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
+                // 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);
 
-        // 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();
+                    // 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);
+                    }
+                }
 
-            //  Update the bookmark and the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+                // De-emphasize the text after the domain name.
+                if (endOfDomainName > 0) {
+                    urlEditText.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+                }
+            }
         }
+    }
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+    private void loadBookmarksFolder() {
+        // Update the bookmarks cursor with the contents of the bookmarks database for the current folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+        // Populate the bookmarks cursor adapter.  `this` specifies the `Context`.  `false` disables `autoRequery`.
+        bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
+            @Override
+            public View newView(Context context, Cursor cursor, ViewGroup parent) {
+                // Inflate the individual item layout.  `false` does not attach it to the root.
+                return getLayoutInflater().inflate(R.layout.bookmarks_drawer_item_linearlayout, parent, false);
+            }
 
-    @Override
-    public void 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);
+            @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 new folder name.
-        String newFolderNameString = editFolderNameEditText.getText().toString();
+                // Get the favorite icon byte array from the cursor.
+                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
 
-        // 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;
-            }
+                // 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);
 
-            // 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();
+                // Display the bitmap in `bookmarkFavoriteIcon`.
+                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 
-            // 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;
+                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
+                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+                bookmarkNameTextView.setText(bookmarkNameString);
+
+                // Make the font bold for folders.
+                if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
+                    bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
+                } else {  // Reset the font to default for normal bookmarks.
+                    bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
+                }
             }
+        };
 
-            // 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();
+        // Populate the `ListView` with the adapter.
+        bookmarksListView.setAdapter(bookmarksCursorAdapter);
 
-            // Update the folder name and icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
+        // Set the bookmarks drawer title.
+        if (currentBookmarksFolder.isEmpty()) {
+            bookmarksTitleTextView.setText(R.string.bookmarks);
+        } else {
+            bookmarksTitleTextView.setText(currentBookmarksFolder);
         }
-
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
-
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
     }
 
-    @Override
-    public void onHttpAuthenticationCancel() {
-        // Cancel the `HttpAuthHandler`.
-        httpAuthHandler.cancel();
-    }
+    private void openWithApp(String url) {
+        // Create the open with intent with `ACTION_VIEW`.
+        Intent openWithAppIntent = new Intent(Intent.ACTION_VIEW);
 
-    @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);
+        // Set the URI but not the MIME type.  This should open all available apps.
+        openWithAppIntent.setData(Uri.parse(url));
 
-        // Proceed with the HTTP authentication.
-        httpAuthHandler.proceed(usernameEditText.getText().toString(), passwordEditText.getText().toString());
-    }
+        // Flag the intent to open in a new task.
+        openWithAppIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-    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));
+        // Show the chooser.
+        startActivity(openWithAppIntent);
     }
 
-    @Override
-    public void onSslErrorCancel() {
-        sslErrorHandler.cancel();
-    }
+    private void openWithBrowser(String url) {
+        // Create the open with intent with `ACTION_VIEW`.
+        Intent openWithBrowserIntent = new Intent(Intent.ACTION_VIEW);
 
-    @Override
-    public void onSslErrorProceed() {
-        sslErrorHandler.proceed();
+        // Set the URI and the MIME type.  `"text/html"` should load browser options.
+        openWithBrowserIntent.setDataAndType(Uri.parse(url), "text/html");
+
+        // Flag the intent to open in a new task.
+        openWithBrowserIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+        // Show the chooser.
+        startActivity(openWithBrowserIntent);
     }
 
-    @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 = "";
+    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);
 
-            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-            navigatingHistory = true;
+        // 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();
 
-            // Go back.
-            mainWebView.goBack();
-        } else {  // There are no pages to go back to.
-            // Load a blank page
-            loadUrl("");
-        }
-    }
+        // Add a new tab.
+        tabLayout.addTab(tabLayout.newTab());
 
-    @Override
-    public void onSslMismatchProceed() {
-        // Do not check the pinned SSL certificate for this domain again until the domain changes.
-        ignorePinnedSslCertificate = true;
-    }
+        // Get the new tab.
+        TabLayout.Tab newTab = tabLayout.getTabAt(newTabNumber);
 
-    @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 = "";
+        // Remove the lint warning below that the current tab might be null.
+        assert newTab != null;
 
-        // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-        navigatingHistory = true;
+        // Set a custom view on the new tab.
+        newTab.setCustomView(R.layout.custom_tab_view);
 
-        // Load the history entry.
-        mainWebView.goBackOrForward(moveBackOrForwardSteps);
+        // Add the new WebView page.
+        webViewPagerAdapter.addPage(newTabNumber, webViewPager);
     }
 
     @Override
-    public void onClearHistory() {
-        // Clear the history.
-        mainWebView.clearHistory();
-    }
+    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;
 
-    // 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);
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                // Load the new folder.
-                loadBookmarksFolder();
-            }
+        // Get the relevant preferences.
+        boolean downloadWithExternalApp = sharedPreferences.getBoolean("download_with_external_app", false);
 
-        } 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 = "";
+        // Set the app bar scrolling.
+        nestedScrollWebView.setNestedScrollingEnabled(sharedPreferences.getBoolean("scroll_app_bar", true));
 
-            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-            navigatingHistory = true;
+        // Allow pinch to zoom.
+        nestedScrollWebView.getSettings().setBuiltInZoomControls(true);
 
-            // Go back.
-            mainWebView.goBack();
-        } else {  // There isn't anything to do in Privacy Browser.
-            // Pass `onBackPressed()` to the system.
-            super.onBackPressed();
-        }
-    }
+        // Hide zoom controls.
+        nestedScrollWebView.getSettings().setDisplayZoomControls(false);
 
-    // 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.
+        // Don't allow mixed content (HTTP and HTTPS) on the same website.
         if (Build.VERSION.SDK_INT >= 21) {
-            // Pass the file to the WebView.
-            fileChooserCallback.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));
+            nestedScrollWebView.getSettings().setMixedContentMode(WebSettings.MIXED_CONTENT_NEVER_ALLOW);
         }
-    }
 
-    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();
+        // 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);
 
-        // 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;
-            }
+        // Set the WebView to load in overview mode (zoomed out to the maximum width).
+        nestedScrollWebView.getSettings().setLoadWithOverviewMode(true);
 
-            // Initialize `unformattedUrl`.
-            URL unformattedUrl = null;
+        // Explicitly disable geolocation.
+        nestedScrollWebView.getSettings().setGeolocationEnabled(false);
 
-            // Convert `unformattedUrlString` to a `URL`, then to a `URI`, and then back to a `String`, which sanitizes the input and adds in any missing components.
-            try {
-                unformattedUrl = new URL(unformattedUrlString);
-            } catch (MalformedURLException e) {
-                e.printStackTrace();
-            }
+        // Create 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;
 
-            // 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;
+                    // Toggle the full screen browsing mode.
+                    if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
+                        // Hide the app bar if specified.
+                        if (hideAppBar) {
+                            actionBar.hide();
+                        }
 
-            // Build the URI.
-            Uri.Builder formattedUri = new Uri.Builder();
-            formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
+                        // Hide the banner ad in the free flavor.
+                        if (BuildConfig.FLAVOR.contentEquals("free")) {
+                            AdHelper.hideAd(findViewById(R.id.adview));
+                        }
 
-            // 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 = "";
+                        // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+
+                        /* Hide the system bars.
+                         * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                         * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                         * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                         * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                         */
+                        rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                                View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+                    } else {  // Switch to normal viewing mode.
+                        // Show the app bar.
+                        actionBar.show();
+
+                        // 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));
+                        }
+
+                        // 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);
+                    }
+
+                    // Consume the double-tap.
+                    return true;
+                } else { // Do not consume the double-tap because full screen browsing mode is disabled.
+                    return false;
+                }
             }
-        } 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;
+        });
+
+        // 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();
+
+            // Send the event to the gesture detector.
+            return doubleTapGestureDetector.onTouchEvent(event);
+        });
+
+        // Register the WebView for a context menu.  This is used to see link targets and download images.
+        registerForContextMenu(nestedScrollWebView);
 
-            // Sanitize the search input.
-            try {
-                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
-            }
+        // 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();
 
-            // Add the base search URL.
-            formattedUrlString = searchURL + encodedUrlString;
-        }
+                // Set the URI and the MIME type.  Specifying `text/html` displays a good number of options.
+                downloadIntent.setDataAndType(Uri.parse(url), "text/html");
 
-        // 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();
+                // Flag the intent to open in a new task.
+                downloadIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-        // Make it so.
-        loadUrl(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.
 
-    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;
+                    // Store the variables for future use by `onRequestPermissionsResult()`.
+                    downloadUrl = url;
+                    downloadContentDisposition = contentDisposition;
+                    downloadContentLength = contentLength;
 
-        // Apply the domain settings.
-        applyDomainSettings(url, true, 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_FILE.
+                        DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
 
-        // 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("");
+                        // 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);
 
-        // Load the URL.
-        mainWebView.loadUrl(url, customHeaders);
-    }
+                    // Show the download file alert dialog.
+                    downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
+                }
+            }
+        });
 
-    public void findPreviousOnPage(View view) {
-        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
-        mainWebView.findNext(false);
-    }
+        // 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);
 
-    public void findNextOnPage(View view) {
-        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
-        mainWebView.findNext(true);
-    }
+            @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;
 
-    public void closeFindOnPage(View view) {
-        // Delete the contents of `find_on_page_edittext`.
-        findOnPageEditText.setText(null);
+                    // Build the match string.
+                    String matchString = activeMatch + "/" + numberOfMatches;
 
-        // Clear the highlighted phrases.
-        mainWebView.clearMatches();
+                    // Set `findOnPageCountTextView`.
+                    findOnPageCountTextView.setText(matchString);
+                }
+            }
+        });
 
-        // Hide the Find on Page `RelativeLayout`.
-        findOnPageLinearLayout.setVisibility(View.GONE);
+        // 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);
+                            }
+                        };
 
-        // Show the URL app bar.
-        supportAppBar.setVisibility(View.VISIBLE);
+                        // Displaying of `mainWebView` after 500 milliseconds.
+                        displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
+                    });
+                }
 
-        // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
-        inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
-    }
+                // Update the progress bar.
+                progressBar.setProgress(progress);
 
-    private void applyAppSettings() {
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // Set the visibility of the progress bar.
+                if (progress < 100) {
+                    // Show the progress bar.
+                    progressBar.setVisibility(View.VISIBLE);
+                } else {
+                    // Hide the progress bar.
+                    progressBar.setVisibility(View.GONE);
 
-        // Store the 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);
+                    // 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);
+                    }
 
-        // Apply the proxy through Orbot settings.
-        applyProxyThroughOrbot(false);
+                    //Stop the swipe to refresh indicator if it is running
+                    swipeRefreshLayout.setRefreshing(false);
+                }
+            }
 
-        // Set Do Not Track status.
-        if (doNotTrackEnabled) {
-            customHeaders.put("DNT", "1");
-        } else {
-            customHeaders.remove("DNT");
-        }
+            // Set the favorite icon when it changes.
+            @Override
+            public void onReceivedIcon(WebView view, Bitmap icon) {
+                // Only update the favorite icon if the website has finished loading.
+                if (progressBar.getVisibility() == View.GONE) {
+                    // Save a copy of the favorite icon.
+                    favoriteIconBitmap = icon;
 
-        // Apply the 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);
+                    // Get the current page position.
+                    int currentPosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-                // Remove the translucent status bar overlay.
-                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                    // Get the current tab.
+                    TabLayout.Tab tab = tabLayout.getTabAt(currentPosition);
 
-                // 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);
+                    // Remove the lint warning below that the current tab might be null.
+                    assert tab != null;
 
-                /* 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);
+                    // Get the custom view from the tab.
+                    View tabView = tab.getCustomView();
 
-                // Add the translucent status flag if it is unset.
-                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                    // Remove the incorrect warning below that the current tab view might be null.
+                    assert tabView != null;
 
-                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);
+                    // Get the favorite icon image view from the tab.
+                    ImageView tabFavoriteIconImageView = tabView.findViewById(R.id.favorite_icon_imageview);
+
+                    // Display the favorite icon in the tab.
+                    tabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
                 }
             }
-        } 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 `appBar` if `findOnPageLinearLayout` is not visible.
-            if (findOnPageLinearLayout.getVisibility() == View.GONE) {
-                appBar.show();
-            }
+            // Save a copy of the title when it changes.
+            @Override
+            public void onReceivedTitle(WebView view, String title) {
+                // Get the current page position.
+                int currentPosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-            // Show the `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));
-            }
+                // Get the current tab.
+                TabLayout.Tab tab = tabLayout.getTabAt(currentPosition);
 
-            // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-            rootCoordinatorLayout.setSystemUiVisibility(0);
+                // Remove the lint warning below that the current tab might be null.
+                assert tab != null;
 
-            // Remove the translucent navigation bar flag if it is set.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+                // Get the custom view from the tab.
+                View tabView = tab.getCustomView();
 
-            // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
-            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                // Remove the incorrect warning below that the current tab view might be null.
+                assert tabView != null;
 
-            // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-            rootCoordinatorLayout.setFitsSystemWindows(true);
-        }
-    }
+                // Get the title text view from the tab.
+                TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
 
-    // `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();
+                // Set the title as the tab text.
+                tabTitleTextView.setText(title);
+            }
 
-        // Initialize a variable to track if the user agent changes.
-        boolean userAgentChanged = false;
+            // Enter full screen video.
+            @Override
+            public void onShowCustomView(View video, CustomViewCallback callback) {
+                // Set the full screen video flag.
+                displayingFullScreenVideo = true;
 
-        // Parse the URL into a URI.
-        Uri uri = Uri.parse(url);
+                // 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));
+                }
 
-        // 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);
-        }
+                // Hide the keyboard.
+                inputMethodManager.hideSoftInputFromWindow(nestedScrollWebView.getWindowToken(), 0);
 
-        // Strings don't like to be null.
-        if (hostName == null) {
-            hostName = "";
-        }
+                // Hide the main content relative layout.
+                mainContentRelativeLayout.setVisibility(View.GONE);
 
-        // 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 bar overlay on the `Drawer Layout`, which is special and needs its own command.
+                drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
 
-            // Reset `ignorePinnedSslCertificate`.
-            ignorePinnedSslCertificate = false;
+                // 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);
 
-            // Reset the favorite icon if specified.
-            if (resetFavoriteIcon) {
-                favoriteIconBitmap = favoriteIconDefaultBitmap;
-                favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(favoriteIconBitmap, 64, 64, true));
+                /* 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);
+
+                // Disable the sliding drawers.
+                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
+
+                // Add the video view to the full screen video frame layout.
+                fullScreenVideoFrameLayout.addView(video);
+
+                // Show the full screen video frame layout.
+                fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
             }
 
-            // 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);
+            // Exit full screen video.
+            @Override
+            public void onHideCustomView() {
+                // Unset the full screen video flag.
+                displayingFullScreenVideo = false;
 
-            // Get a full cursor from `domainsDatabaseHelper`.
-            Cursor domainNameCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
+                // Remove all the views from the full screen video frame layout.
+                fullScreenVideoFrameLayout.removeAllViews();
 
-            // Initialize `domainSettingsSet`.
-            Set<String> domainSettingsSet = new HashSet<>();
+                // Hide the full screen video frame layout.
+                fullScreenVideoFrameLayout.setVisibility(View.GONE);
 
-            // Get the domain name column index.
-            int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
+                // Enable the sliding drawers.
+                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 
-            // Populate `domainSettingsSet`.
-            for (int i = 0; i < domainNameCursor.getCount(); i++) {
-                // Move `domainsCursor` to the current row.
-                domainNameCursor.moveToPosition(i);
+                // Show the main content relative layout.
+                mainContentRelativeLayout.setVisibility(View.VISIBLE);
 
-                // Store the domain name in `domainSettingsSet`.
-                domainSettingsSet.add(domainNameCursor.getString(domainNameColumnIndex));
-            }
+                // 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();
+                    }
 
-            // Close `domainNameCursor.
-            domainNameCursor.close();
+                    // Hide the banner ad in the free flavor.
+                    if (BuildConfig.FLAVOR.contentEquals("free")) {
+                        AdHelper.hideAd(findViewById(R.id.adview));
+                    }
 
-            // Initialize variables to track if domain settings will be applied and, if so, under which name.
-            domainSettingsApplied = false;
-            String domainNameInDatabase = null;
+                    // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+                    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+
+                    /* Hide the system bars.
+                     * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                     * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                     * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                     * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                     */
+                    rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                            View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+                } else {  // Switch to normal viewing mode.
+                    // Remove the `SYSTEM_UI` flags from the root frame layout.
+                    rootFrameLayout.setSystemUiVisibility(0);
+
+                    // Add the translucent status flag.
+                    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                }
 
-            // Check the hostname.
-            if (domainSettingsSet.contains(hostName)) {
-                domainSettingsApplied = true;
-                domainNameInDatabase = hostName;
+                // 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));
+                }
             }
 
-            // 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;
+            // 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;
 
-                    // Store the applied domain names as it appears in the database.
-                    domainNameInDatabase = "*." + hostName;
-                }
+                    // Create an intent to open a chooser based ont the file chooser parameters.
+                    Intent fileChooserIntent = fileChooserParams.createIntent();
 
-                // Strip out the lowest subdomain of of the host name.
-                hostName = hostName.substring(hostName.indexOf(".") + 1);
+                    // 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;
             }
+        });
+
+        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 = "";
 
+                    // 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);
 
-            // Get a handle for the shared preference.
-            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                    // 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);
 
-            // 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);
+                        // 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);
 
-            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();
+                    // Parse the url and set it as the data for the intent.
+                    emailIntent.setData(Uri.parse(url));
 
-                // 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));
+                    // Open the email program in a new task instead of as part of Privacy Browser.
+                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-                // 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;
+                    // Make it so.
+                    startActivity(emailIntent);
 
-                    case DomainsDatabaseHelper.NIGHT_MODE_DISABLED:
-                        nightMode = false;
-                        break;
-                }
+                    // 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);
 
-                // Store the domain JavaScript status.  This is used by the options menu night mode toggle.
-                domainSettingsJavaScriptEnabled = javaScriptEnabled;
+                    // Add the phone number to the intent.
+                    dialIntent.setData(Uri.parse(url));
 
-                // Enable JavaScript if night mode is enabled.
-                if (nightMode) {
-                    javaScriptEnabled = true;
-                }
+                    // Open the dialer in a new task instead of as part of Privacy Browser.
+                    dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-                // 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)));
-                }
+                    // Make it so.
+                    startActivity(dialIntent);
 
-                // 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)));
-                }
+                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
+                    return true;
+                } else {  // Load a system chooser to select an app that can handle the URL.
+                    // Open an app that can handle the URL.
+                    Intent genericIntent = new Intent(Intent.ACTION_VIEW);
 
-                // Close `currentHostDomainSettingsCursor`.
-                currentHostDomainSettingsCursor.close();
+                    // Add the URL to the intent.
+                    genericIntent.setData(Uri.parse(url));
 
-                // Apply the domain settings.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
+                    // List all apps that can handle the URL instead of just opening the first one.
+                    genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
 
-                // Apply the form data setting if the API < 26.
-                if (Build.VERSION.SDK_INT < 26) {
-                    mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
-                }
+                    // Open the app in a new task instead of as part of Privacy Browser.
+                    genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-                // 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);
-                }
+                    // 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 third-party cookies status if API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
+                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
+                    return true;
                 }
+            }
 
-                // 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);
+            // 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()));
 
-                        // 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;
+                // Reset the whitelist results tracker.
+                String[] whitelistResultStringArray = null;
 
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                mainWebView.getSettings().setUserAgentString("");
-                                break;
+                // Initialize the third party request tracker.
+                boolean isThirdPartyRequest = false;
 
-                            case SETTINGS_CUSTOM_USER_AGENT:
-                                // Set the custom user agent.
-                                mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
-                                break;
+                // Initialize the current domain string.
+                String currentDomain = "";
 
-                            default:
-                                // Get the user agent string from the user agent data array
-                                mainWebView.getSettings().setUserAgentString(userAgentDataArray[defaultUserAgentArrayPosition]);
-                        }
-                    } else {  // Set the user agent according to the stored name.
-                        // Get the array position of the user agent name.
-                        int userAgentArrayPosition = userAgentNamesArray.getPosition(userAgentName);
+                // 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);
 
-                        switch (userAgentArrayPosition) {
-                            case UNRECOGNIZED_USER_AGENT:  // The user agent name contains a custom user agent.
-                                mainWebView.getSettings().setUserAgentString(userAgentName);
-                                break;
+                    // Get the domain host names.
+                    String currentBaseDomain = currentDomainUri.getHost();
+                    String requestBaseDomain = requestDomainUri.getHost();
 
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                mainWebView.getSettings().setUserAgentString("");
-                                break;
+                    // Update the current domain variable.
+                    currentDomain = currentBaseDomain;
 
-                            default:
-                                // Get the user agent string from the user agent data array.
-                                mainWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                    // 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);
                         }
-                    }
 
-                    // Store the applied user agent string, which is used in the View Source activity.
-                    appliedUserAgentString = mainWebView.getSettings().getUserAgentString();
+                        // 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 user agent change tracker.
-                    userAgentChanged = !appliedUserAgentString.equals(initialUserAgent);
+                        // Update the third party request tracker.
+                        isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
+                    }
                 }
 
-                // 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;
+                // Get the current WebView page position.
+                int webViewPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_ENABLED:
-                        // Enable swipe to refresh.
-                        swipeRefreshLayout.setEnabled(true);
-                        break;
+                // Determine if the WebView is currently displayed.
+                boolean webViewDisplayed = (webViewPagePosition == tabLayout.getSelectedTabPosition());
 
-                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_DISABLED:
-                        // Disable swipe to refresh.
-                        swipeRefreshLayout.setEnabled(false);
-                }
+                // 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});
 
-                // Set the loading of webpage images.
-                switch (displayWebpageImagesInt) {
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
-                        break;
+                    // Increment the blocked requests counters.
+                    nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                    nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS);
 
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(true);
-                        break;
+                    // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                    if (webViewDisplayed) {
+                        // Updating the UI must be run from the UI thread.
+                        activity.runOnUiThread(() -> {
+                            // Update the menu item titles.
+                            navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                            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));
+                        });
+                    }
 
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(false);
-                        break;
+                    // Return an empty web resource response.
+                    return emptyWebResourceResponse;
                 }
 
-                // 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;
-                }
+                // 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);
 
-                // Apply the default settings.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
-                mainWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
-                swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
+                    // 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]});
 
-                // Apply the form data setting if the API < 26.
-                if (Build.VERSION.SDK_INT < 26) {
-                    mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
-                }
+                        // 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));
+                            });
+                        }
 
-                // Reset the pinned SSL certificate information.
-                domainSettingsDatabaseId = -1;
-                pinnedDomainSslCertificate = false;
-                pinnedDomainSslIssuedToCNameString = "";
-                pinnedDomainSslIssuedToONameString = "";
-                pinnedDomainSslIssuedToUNameString = "";
-                pinnedDomainSslIssuedByCNameString = "";
-                pinnedDomainSslIssuedByONameString = "";
-                pinnedDomainSslIssuedByUNameString = "";
-                pinnedDomainSslStartDate = null;
-                pinnedDomainSslEndDate = null;
+                        // 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]});
 
-                // Set third-party cookies status if API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
+                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
+                        return null;
+                    }
                 }
 
-                // 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 EasyList if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST)) {
+                    // Check the URL against EasyList.
+                    String[] easyListResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyList);
 
-                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                            // Set the user agent to `""`, which uses the default value.
-                            mainWebView.getSettings().setUserAgentString("");
-                            break;
+                    // Process the EasyList results.
+                    if (easyListResults[0].equals(BlockListHelper.REQUEST_BLOCKED)) {  // The resource request matched EasyList's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {easyListResults[0], easyListResults[1], easyListResults[2], easyListResults[3], easyListResults[4], easyListResults[5]});
 
-                        case 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_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));
+                            });
+                        }
 
-                        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 (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]};
                     }
+                }
 
-                    // Store the applied user agent string, which is used in the View Source activity.
-                    appliedUserAgentString = mainWebView.getSettings().getUserAgentString();
+                // 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);
 
-                    // Update the user agent change tracker.
-                    userAgentChanged = !appliedUserAgentString.equals(initialUserAgent);
-                }
+                    // 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[5],
+                                easyPrivacyResults[5]});
 
-                // Set the loading of webpage images.
-                mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
+                        // 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));
+                            });
+                        }
 
-                // 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 (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]};
+                    }
+                }
 
-            // Close the domains database helper.
-            domainsDatabaseHelper.close();
+                // 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 privacy icons, but only if `mainMenu` has already been populated.
-            if (mainMenu != null) {
-                updatePrivacyIcons(true);
-            }
-        }
+                    // 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]});
 
-        // Reload the website if returning from the Domains activity.
-        if (reloadWebsite) {
-            mainWebView.reload();
-        }
+                        // 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));
+                            });
+                        }
 
-        // Return the user agent changed status.
-        return userAgentChanged;
-    }
+                        // 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);
 
-    private void applyProxyThroughOrbot(boolean reloadWebsite) {
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                    // 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]});
 
-        // 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));
+                        // 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));
+                            });
+                        }
+
+                        // The resource request was blocked.  Return an empty web resource response.
+                        return emptyWebResourceResponse;
+                    } else if (fanboysSocialListResults[0].equals(BlockListHelper.REQUEST_ALLOWED)) {  // The resource request matched Fanboy's Social Blocking List's whitelist.
+                        // Update the whitelist result string array tracker.
+                        whitelistResultStringArray = new String[] {fanboysSocialListResults[0], fanboysSocialListResults[1], fanboysSocialListResults[2], fanboysSocialListResults[3],
+                                fanboysSocialListResults[4], fanboysSocialListResults[5]};
+                    }
+                }
 
-        // Set the homepage, search, and proxy options.
-        if (proxyThroughOrbot) {  // Set the Tor options.
-            // Set `torHomepageString` as `homepage`.
-            homepage = torHomepageString;
+                // 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});
+                }
 
-            // If formattedUrlString is null assign the homepage to it.
-            if (formattedUrlString == null) {
-                formattedUrlString = homepage;
+                // The resource request has not been blocked.  `return null` loads the requested resource.
+                return null;
             }
 
-            // 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;
+            // Handle HTTP authentication requests.
+            @Override
+            public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
+                // Store `handler` so it can be accessed from `onHttpAuthenticationCancel()` and `onHttpAuthenticationProceed()`.
+                httpAuthHandler = handler;
+
+                // Display the HTTP authentication dialog.
+                DialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
+                httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
             }
 
-            // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
+            @Override
+            public void onPageStarted(WebView view, String url, Bitmap favicon) {
+                // Reset the list of resource requests.
+                nestedScrollWebView.clearResourceRequests();
 
-            // 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));
-            }
+                // Reset the requests counters.
+                nestedScrollWebView.resetRequestsCounters();
 
-            // Check to see if Orbot is ready.
-            if (!orbotStatus.equals("ON")) {  // Orbot is not ready.
-                // Set `waitingForOrbot`.
-                waitingForOrbot = true;
+                // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
+                if (nightMode) {
+                    nestedScrollWebView.setVisibility(View.INVISIBLE);
+                }
 
-                // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
-                mainWebView.getSettings().setUseWideViewPort(false);
+                // Hide the keyboard.
+                inputMethodManager.hideSoftInputFromWindow(nestedScrollWebView.getWindowToken(), 0);
 
-                // 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;
+                // 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;
 
-            // If formattedUrlString is null assign the homepage to it.
-            if (formattedUrlString == null) {
-                formattedUrlString = homepage;
-            }
+                    // Display the formatted URL text.
+                    urlEditText.setText(formattedUrlString);
 
-            // 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 text highlighting to `urlTextBox`.
+                    highlightUrlText();
 
-            // Reset the proxy to default.  The host is `""` and the port is `"0"`.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
+                    // Get a URI for the current URL.
+                    Uri currentUri = Uri.parse(formattedUrlString);
 
-            // 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));
-            }
+                    // Reset the list of host IP addresses.
+                    nestedScrollWebView.clearCurrentIpAddresses();
 
-            // Reset `waitingForOrbot.
-            waitingForOrbot = false;
+                    // Get the IP addresses for the host.
+                    new GetHostIpAddresses(activity, getSupportFragmentManager(), nestedScrollWebView).execute(currentUri.getHost());
 
-            // Reload the website if requested.
-            if (reloadWebsite) {
-                mainWebView.reload();
-            }
-        }
-    }
+                    // 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);
 
-    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);
-        }
+                        // Reset `navigatingHistory`.
+                        navigatingHistory = false;
 
-        // 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);
-            }
-        }
+                        // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
+                        if (userAgentChanged) {
+                            loadUrl(formattedUrlString);
+                        }
+                    }
 
-        // 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);
+                    // 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);
+
+                        // If the icon is displayed in the AppBar, set it according to the theme.
+                        if (displayAdditionalAppBarIcons) {
+                            if (darkTheme) {
+                                refreshMenuItem.setIcon(R.drawable.close_dark);
+                            } else {
+                                refreshMenuItem.setIcon(R.drawable.close_light);
+                            }
+                        }
+                    }
+                }
             }
-        }
 
-        // Update the refresh icon.
-        if (darkTheme) {
-            refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
-        } else {
-            refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
-        }
+            // 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"));
+                }
 
-        // `invalidateOptionsMenu` calls `onPrepareOptionsMenu()` and redraws the icons in the `AppBar`.
-        if (runInvalidateOptionsMenu) {
-            invalidateOptionsMenu();
-        }
-    }
+                // 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();
+                }
 
-    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 the Refresh menu item if it has been created.
+                if (refreshMenuItem != null) {
+                    // Reset the Refresh title.
+                    refreshMenuItem.setTitle(R.string.refresh);
 
-        // Set the URI and the mime type.  `"*/*"` will display the maximum number of options.
-        downloadIntent.setDataAndType(Uri.parse(url), "text/html");
+                    // 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);
+                        }
+                    }
+                }
 
-        // Flag the intent to open in a new task.
-        downloadIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-        // Show the chooser.
-        startActivity(Intent.createChooser(downloadIntent, getString(R.string.open_with)));
-    }
+                // Clear the cache and history if Incognito Mode is enabled.
+                if (incognitoModeEnabled) {
+                    // Clear the cache.  `true` includes disk files.
+                    nestedScrollWebView.clearCache(true);
 
-    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;
-        }
+                    // Clear the back/forward history.
+                    nestedScrollWebView.clearHistory();
 
-        // Get the index of the last `.` in the domain.
-        int lastDotIndex = baseUrl.lastIndexOf(".");
+                    // Manually delete cache folders.
+                    try {
+                        // Delete the main cache directory.
+                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
 
-        // Get the index of the penultimate `.` in the domain.
-        int penultimateDotIndex = baseUrl.lastIndexOf(".", lastDotIndex - 1);
+                        // Delete the secondary `Service Worker` cache directory.
+                        // A `String[]` must be used because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
+                        privacyBrowserRuntime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
+                    } catch (IOException e) {
+                        // Do nothing if an error is thrown.
+                    }
+                }
 
-        // 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);
+                // 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 = "";
 
-            // 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);
-            }
-        }
+                        urlEditText.setText(formattedUrlString);
 
-        // De-emphasize the text after the domain name.
-        if (endOfDomainName > 0) {
-            urlTextBox.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
-        }
-    }
+                        // Request focus for `urlTextBox`.
+                        urlEditText.requestFocus();
 
-    private void loadBookmarksFolder() {
-        // Update the bookmarks cursor with the contents of the bookmarks database for the current folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+                        // Display the keyboard.
+                        inputMethodManager.showSoftInput(urlEditText, 0);
 
-        // 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);
-            }
+                        // 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();
 
-            @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);
+                        // 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);
 
-                // Get the favorite icon byte array from the cursor.
-                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
+                            // Apply text highlighting to `urlTextBox`.
+                            highlightUrlText();
+                        }
+                    }
 
-                // 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);
+                    // 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);
+                    }
+                }
+            }
 
-                // Display the bitmap in `bookmarkFavoriteIcon`.
-                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
+            // Handle SSL Certificate errors.
+            @Override
+            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
+                // Get the current website SSL certificate.
+                SslCertificate currentWebsiteSslCertificate = error.getCertificate();
 
-                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
-                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
-                bookmarkNameTextView.setText(bookmarkNameString);
+                // 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();
 
-                // 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);
+                // 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.
+
+                    // 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);
+            }
         }
     }
 }
\ No newline at end of file