]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/activities/MainWebViewActivity.java
Fix unwanted restarts when a keyboard is connected/disconnected. https://redmine...
[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
index 99a2ce30806441bbf5f3f9051f95d0d0899a74b3..e2664e5be237eaac0a781b9cb41253fae8de1969 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>.
  *
@@ -23,8 +23,9 @@ package com.stoutner.privacybrowser.activities;
 
 import android.Manifest;
 import android.annotation.SuppressLint;
-import android.app.DialogFragment;
+import android.app.Activity;
 import android.app.DownloadManager;
+import android.app.SearchManager;
 import android.content.ActivityNotFoundException;
 import android.content.BroadcastReceiver;
 import android.content.ClipData;
@@ -51,25 +52,6 @@ import android.os.Handler;
 import android.preference.PreferenceManager;
 import android.print.PrintDocumentAdapter;
 import android.print.PrintManager;
-import android.support.annotation.NonNull;
-import android.support.design.widget.CoordinatorLayout;
-import android.support.design.widget.FloatingActionButton;
-import android.support.design.widget.NavigationView;
-import android.support.design.widget.Snackbar;
-import android.support.v4.app.ActivityCompat;
-import android.support.v4.content.ContextCompat;
-// `ShortcutInfoCompat`, `ShortcutManagerCompat`, and `IconCompat` can be switched to the non-compat version once API >= 26.
-import android.support.v4.content.pm.ShortcutInfoCompat;
-import android.support.v4.content.pm.ShortcutManagerCompat;
-import android.support.v4.graphics.drawable.IconCompat;
-import android.support.v4.view.GravityCompat;
-import android.support.v4.widget.DrawerLayout;
-import android.support.v4.widget.SwipeRefreshLayout;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.ActionBarDrawerToggle;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.app.AppCompatDialogFragment;
-import android.support.v7.widget.Toolbar;
 import android.text.Editable;
 import android.text.Spanned;
 import android.text.TextWatcher;
@@ -92,6 +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;
@@ -108,27 +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;
@@ -147,124 +154,38 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
+// TODO.  Store up reloads for tabs that are not visible.
+// TODO.  New tabs are white in dark mode.
+// TODO.  Hide the tabs in full screen mode.
+// TODO.  Find on page.
+// TODO.  Use TabLayout.setScrollPosition to scroll to new 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 {
-
-    // `darkTheme` is public static so it can be accessed from everywhere.
-    public static boolean darkTheme;
-
-    // `allowScreenshots` is public static so it can be accessed from everywhere.  It is also used in `onCreate()`.
-    public static boolean allowScreenshots;
+        DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener, DownloadLocationPermissionDialog.DownloadLocationPermissionDialogListener, EditBookmarkDialog.EditBookmarkListener,
+        EditBookmarkFolderDialog.EditBookmarkFolderListener, NavigationView.OnNavigationItemSelectedListener, WebViewTabFragment.NewTabListener, PinnedMismatchDialog.PinnedMismatchListener,
+        UrlHistoryDialog.UrlHistoryListener {
 
-    // `favoriteIconBitmap` is public static so it can be accessed from `CreateHomeScreenShortcutDialog`, `BookmarksActivity`, `BookmarksDatabaseViewActivity`, `CreateBookmarkDialog`,
-    // `CreateBookmarkFolderDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `EditBookmarkDatabaseViewDialog`, and `ViewSslCertificateDialog`.  It is also used in `onCreate()`,
-    // `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onCreateHomeScreenShortcutCreate()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `applyDomainSettings()`.
-    public static Bitmap favoriteIconBitmap;
-
-    // `formattedUrlString` is public static so it can be accessed from `BookmarksActivity`, `CreateBookmarkDialog`, and `AddDomainDialog`.
-    // It is also used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onCreateHomeScreenShortcutCreate()`, and `loadUrlFromTextBox()`.
-    public static String formattedUrlString;
-
-    // `sslCertificate` is public static so it can be accessed from `DomainsActivity`, `DomainsListFragment`, `DomainSettingsFragment`, `PinnedSslCertificateMismatchDialog`,
-    // and `ViewSslCertificateDialog`.  It is also used in `onCreate()`.
-    public static SslCertificate sslCertificate;
-
-    // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()` and `onResume()`.
+    // `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 `HttpAuthenticationDialog`, `PinnedMismatchDialog`, and `SslCertificateErrorDialog`.  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()`
+    // `reloadOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is used in `onRestart()`
     public static boolean reloadOnRestart;
 
-    // `reloadUrlOnRestart` is public static so it can be accessed from `SettingsFragment` and `BookmarksActivity`.  It is also used in `onRestart()`.
+    // The load URL on restart variables are public static so they can be accessed from `BookmarksActivity`.  They are used in `onRestart()`.
     public static boolean loadUrlOnRestart;
+    public static String urlToLoadOnRestart;
 
     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
     public static boolean restartFromBookmarksActivity;
 
-    // The block list versions are public static so they can be accessed from `AboutTabFragment`.  They are also used in `onCreate()`.
-    public static String easyListVersion;
-    public static String easyPrivacyVersion;
-    public static String fanboysAnnoyanceVersion;
-    public static String fanboysSocialVersion;
-    public static String ultraPrivacyVersion;
-
-    // The request items are public static so they can be accessed by `BlockListHelper`, `RequestsArrayAdapter`, and `ViewRequestsDialog`.  They are also used in `onCreate()` and `onPrepareOptionsMenu()`.
-    public static List<String[]> resourceRequests;
-    public static String[] whiteListResultStringArray;
-    int easyListBlockedRequests;
-    int easyPrivacyBlockedRequests;
-    int fanboysAnnoyanceListBlockedRequests;
-    int fanboysSocialBlockingListBlockedRequests;
-    int ultraPrivacyBlockedRequests;
-    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;
@@ -274,97 +195,44 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
 
 
-    // `appBar` is used in `onCreate()`, `onOptionsItemSelected()`, `closeFindOnPage()`, and `applyAppSettings()`.
-    private ActionBar appBar;
-
-    // `navigatingHistory` is used in `onCreate()`, `onNavigationItemSelected()`, `onSslMismatchBack()`, and `applyDomainSettings()`.
-    private boolean navigatingHistory;
 
-    // `favoriteIconDefaultBitmap` is used in `onCreate()` and `applyDomainSettings`.
-    private Bitmap favoriteIconDefaultBitmap;
-
-    // `drawerLayout` is used in `onCreate()`, `onNewIntent()`, `onBackPressed()`, and `onRestart()`.
-    private DrawerLayout drawerLayout;
-
-    // `rootCoordinatorLayout` is used in `onCreate()` and `applyAppSettings()`.
-    private CoordinatorLayout rootCoordinatorLayout;
-
-    // `mainWebView` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
-    // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, and `setDisplayWebpageImages()`.
-    private WebView mainWebView;
-
-    // `fullScreenVideoFrameLayout` is used in `onCreate()` and `onConfigurationChanged()`.
-    private FrameLayout fullScreenVideoFrameLayout;
-
-    // `swipeRefreshLayout` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `onRestart()`.
-    private SwipeRefreshLayout swipeRefreshLayout;
-
-    // `urlAppBarRelativeLayout` is used in `onCreate()` and `applyDomainSettings()`.
-    private RelativeLayout urlAppBarRelativeLayout;
-
-    // `favoriteIconImageView` is used in `onCreate()` and `applyDomainSettings()`
-    private ImageView favoriteIconImageView;
-
-    // `cookieManager` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`, `loadUrlFromTextBox()`, `onDownloadImage()`, `onDownloadFile()`, and `onRestart()`.
-    private CookieManager cookieManager;
+    // The current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
+    // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, `applyProxyThroughOrbot()`, and `applyDomainSettings()`.
+    private NestedScrollWebView currentWebView;
 
     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
     private final Map<String, String> customHeaders = new HashMap<>();
 
-    // `javaScriptEnabled` is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyDomainSettings()`, and `updatePrivacyIcons()`.
-    private boolean javaScriptEnabled;
-
-    // `firstPartyCookiesEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onDownloadImage()`, `onDownloadFile()`, and `applyDomainSettings()`.
-    private boolean firstPartyCookiesEnabled;
-
-    // `thirdPartyCookiesEnabled` used in `onCreate()`, `onPrepareOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
-    private boolean thirdPartyCookiesEnabled;
-
-    // `domStorageEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
-    private boolean domStorageEnabled;
-
-    // `saveFormDataEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.  It can be removed once the minimum API >= 26.
-    private boolean saveFormDataEnabled;
-
-    // `nightMode` is used in `onCreate()` and  `applyDomainSettings()`.
-    private boolean nightMode;
-
-    // `displayWebpageImagesBoolean` is used in `applyAppSettings()` and `applyDomainSettings()`.
-    private boolean displayWebpageImagesBoolean;
-
-    // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyAppSettings()`.
-    private String homepage;
-
-    // `searchURL` is used in `loadURLFromTextBox()` and `applyAppSettings()`.
+    // The search URL is set in `applyProxyThroughOrbot()` and used in `onCreate()`, `onNewIntent()`, `loadURLFromTextBox()`, and `initializeWebView()`.
     private String searchURL;
 
-    // The block list variables are used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
-    private boolean easyListEnabled;
-    private boolean easyPrivacyEnabled;
-    private boolean fanboysAnnoyanceListEnabled;
-    private boolean fanboysSocialBlockingListEnabled;
-    private boolean ultraPrivacyEnabled;
+    // The options menu is set in `onCreateOptionsMenu()` and used in `onOptionsItemSelected()`, `updatePrivacyIcons()`, and `initializeWebView()`.
+    private Menu optionsMenu;
 
-    // `privacyBrowserRuntime` is used in `onCreate()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
-    private Runtime privacyBrowserRuntime;
+    // The blocklists are populated in `onCreate()` and accessed from `initializeWebView()`.
+    private ArrayList<List<String[]>> easyList;
+    private ArrayList<List<String[]>> easyPrivacy;
+    private ArrayList<List<String[]>> fanboysAnnoyanceList;
+    private ArrayList<List<String[]>> fanboysSocialList;
+    private ArrayList<List<String[]>> ultraPrivacy;
 
-    // `proxyThroughOrbot` is used in `onRestart()` and `applyAppSettings()`.
+    // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
+    private String webViewDefaultUserAgent;
+
+    // `proxyThroughOrbot` is used in `onRestart()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxyThroughOrbot()`.
     private boolean proxyThroughOrbot;
 
-    // `incognitoModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
+    // The incognito mode is set in `applyAppSettings()` and used in `initializeWebView()`.
     private boolean incognitoModeEnabled;
 
-    // `fullScreenBrowsingModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
+    // The full screen browsing mode tracker is set it `applyAppSettings()` and used in `initializeWebView()`.
     private boolean fullScreenBrowsingModeEnabled;
 
     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
     private boolean inFullScreenBrowsingMode;
 
-    // `hideSystemBarsOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
-    private boolean hideSystemBarsOnFullscreen;
-
-    // `translucentNavigationBarOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
-    private boolean translucentNavigationBarOnFullscreen;
+    // Hide app bar is used in `applyAppSettings()` and `initializeWebView()`.
+    private boolean hideAppBar;
 
     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
     private boolean reapplyDomainSettingsOnRestart;
@@ -375,84 +243,30 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `displayingFullScreenVideo` is used in `onCreate()` and `onResume()`.
     private boolean displayingFullScreenVideo;
 
-    // `currentDomainName` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onAddDomain()`, and `applyDomainSettings()`.
-    private String currentDomainName;
-
-    // `ignorePinnedSslCertificateForDomain` is used in `onCreate()`, `onSslMismatchProceed()`, and `applyDomainSettings()`.
-    private boolean ignorePinnedSslCertificate;
-
-    // `orbotStatusBroadcastReciever` is used in `onCreate()` and `onDestroy()`.
+    // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
     private BroadcastReceiver orbotStatusBroadcastReceiver;
 
-    // `waitingForOrbot` is used in `onCreate()`, `onResume()`, and `applyAppSettings()`.
+    // `waitingForOrbot` is used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
     private boolean waitingForOrbot;
 
-    // `domainSettingsApplied` is used in `prepareOptionsMenu()`, `applyDomainSettings()`, and `setDisplayWebpageImages()`.
-    private boolean domainSettingsApplied;
-
-    // `displayWebpageImagesInt` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
-    private int displayWebpageImagesInt;
-
-    // `onTheFlyDisplayImagesSet` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
-    private boolean onTheFlyDisplayImagesSet;
-
-    // `waitingForOrbotData` is used in `onCreate()` and `applyAppSettings()`.
-    private String waitingForOrbotHTMLString;
-
-    // `privateDataDirectoryString` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`.
-    private String privateDataDirectoryString;
-
-    // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private LinearLayout findOnPageLinearLayout;
-
-    // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private EditText findOnPageEditText;
-
-    // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
-    private Menu mainMenu;
-
-    // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
-    private ActionBarDrawerToggle drawerToggle;
-
-    // `supportAppBar` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
-    private Toolbar supportAppBar;
-
-    // `urlTextBox` is used in `onCreate()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, `loadUrl()`, and `highlightUrlText()`.
-    private EditText urlTextBox;
+    // The action bar drawer toggle is initialized in `onCreate()` and used in `onResume()`.
+    private ActionBarDrawerToggle actionBarDrawerToggle;
 
     // The color spans are used in `onCreate()` and `highlightUrlText()`.
     private ForegroundColorSpan redColorSpan;
     private ForegroundColorSpan initialGrayColorSpan;
     private ForegroundColorSpan finalGrayColorSpan;
 
-    // `sslErrorHandler` is used in `onCreate()`, `onSslErrorCancel()`, and `onSslErrorProceed`.
-    private SslErrorHandler sslErrorHandler;
-
-    // `httpAuthHandler` is used in `onCreate()`, `onHttpAuthenticationCancel()`, and `onHttpAuthenticationProceed()`.
-    private static HttpAuthHandler httpAuthHandler;
-
-    // `inputMethodManager` is used in `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `closeFindOnPage()`.
-    private InputMethodManager inputMethodManager;
+    // The drawer header padding variables are used in `onCreate()` and `onConfigurationChanged()`.
+    private int drawerHeaderPaddingLeftAndRight;
+    private int drawerHeaderPaddingTop;
+    private int drawerHeaderPaddingBottom;
 
-    // `mainWebViewRelativeLayout` is used in `onCreate()` and `onNavigationItemSelected()`.
-    private RelativeLayout mainWebViewRelativeLayout;
-
-    // `urlIsLoading` is used in `onCreate()`, `loadUrl()`, and `applyDomainSettings()`.
-    private boolean urlIsLoading;
-
-    // `pinnedDomainSslCertificate` is used in `onCreate()` and `applyDomainSettings()`.
-    private boolean pinnedDomainSslCertificate;
-
-    // `bookmarksDatabaseHelper` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
+    // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
+    // and `loadBookmarksFolder()`.
     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
 
-    // `bookmarksListView` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, and `loadBookmarksFolder()`.
-    private ListView bookmarksListView;
-
-    // `bookmarksTitleTextView` is used in `onCreate()` and `loadBookmarksFolder()`.
-    private TextView bookmarksTitleTextView;
-
-    // `bookmarksCursor` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
+    // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
     private Cursor bookmarksCursor;
 
     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
@@ -464,7 +278,7 @@ 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;
@@ -472,27 +286,20 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `downloadImageUrl` is used in `onCreateContextMenu()` and `onRequestPermissionResult()`.
     private String downloadImageUrl;
 
-    // The user agent variables are used in `onCreate()` and `applyDomainSettings()`.
-    private ArrayAdapter<CharSequence> userAgentNamesArray;
-    private String[] userAgentDataArray;
-
-    // The request codes are used in `onCreate()`, `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, and `onRequestPermissionResult()`.
+    // The request codes are used in `onCreate()`, `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, `onRequestPermissionResult()`, and `initializeWebView()`.
     private final int DOWNLOAD_FILE_REQUEST_CODE = 1;
     private final int DOWNLOAD_IMAGE_REQUEST_CODE = 2;
 
     @Override
-    // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.  The whole premise of Privacy Browser is built around an understanding of these dangers.
-    // Also, remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
-    @SuppressLint({"SetJavaScriptEnabled", "ClickableViewAccessibility"})
-    // Remove Android Studio's warning about deprecations.  We have to use the deprecated `getColor()` until API >= 23.
-    @SuppressWarnings("deprecation")
+    // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
+    @SuppressLint("ClickableViewAccessibility")
     protected void onCreate(Bundle savedInstanceState) {
         // Get a handle for the shared preferences.
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
         // Get the theme and screenshot preferences.
-        darkTheme = sharedPreferences.getBoolean("dark_theme", false);
-        allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
+        boolean allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
 
         // Disable screenshots if not allowed.
         if (!allowScreenshots) {
@@ -510,54 +317,61 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         super.onCreate(savedInstanceState);
 
         // Set the content view.
-        setContentView(R.layout.main_drawerlayout);
+        setContentView(R.layout.main_framelayout);
+
+        // Get a handle for the input method.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-        // Get a handle for `inputMethodManager`.
-        inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+        // Get a handle for the toolbar.
+        Toolbar toolbar = findViewById(R.id.toolbar);
 
-        // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
-        supportAppBar = findViewById(R.id.app_bar);
-        setSupportActionBar(supportAppBar);
-        appBar = getSupportActionBar();
+        // Set the action bar.  `SupportActionBar` must be used until the minimum API is >= 21.
+        setSupportActionBar(toolbar);
 
-        // This is needed to get rid of the Android Studio warning that `appBar` might be null.
-        assert appBar != null;
+        // Get a handle for the action bar.
+        ActionBar actionBar = getSupportActionBar();
 
-        // Add the custom `url_app_bar` layout, which shows the favorite icon and the URL text bar.
-        appBar.setCustomView(R.layout.url_app_bar);
-        appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
+        // This is needed to get rid of the Android Studio warning that the action bar might be null.
+        assert actionBar != null;
+
+        // Add the custom layout, which shows the URL text bar.
+        actionBar.setCustomView(R.layout.url_app_bar);
+        actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
 
         // Initialize the foreground color spans for highlighting the URLs.  We have to use the deprecated `getColor()` until API >= 23.
         redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
         initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
         finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
 
-        // Get a handle for `urlTextBox`.
-        urlTextBox = findViewById(R.id.url_edittext);
+        // Get handles for the URL views.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
         // Remove the formatting from `urlTextBar` when the user is editing the text.
-        urlTextBox.setOnFocusChangeListener((View v, boolean hasFocus) -> {
-            if (hasFocus) {  // The user is editing `urlTextBox`.
+        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);
-            } else {  // The user has stopped editing `urlTextBox`.
+                urlEditText.getText().removeSpan(redColorSpan);
+                urlEditText.getText().removeSpan(initialGrayColorSpan);
+                urlEditText.getText().removeSpan(finalGrayColorSpan);
+            } else {  // The user has stopped editing the URL text box.
+                // Move to the beginning of the string.
+                urlEditText.setSelection(0);
+
                 // Reapply the highlighting.
                 highlightUrlText();
             }
         });
 
         // 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.
-                try {
-                    loadUrlFromTextBox();
-                } catch (UnsupportedEncodingException e) {
-                    e.printStackTrace();
-                }
+                loadUrlFromTextBox();
+
                 // If the enter key was pressed, consume the event.
                 return true;
             } else {
@@ -566,11 +380,7 @@ 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;
 
@@ -581,13 +391,45 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Store the content of the status message in `orbotStatus`.
                 orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
 
-                // If we are waiting on Orbot, load the website now that Orbot is connected.
+                // If Privacy Browser is waiting on Orbot, load the website now that Orbot is connected.
                 if (orbotStatus.equals("ON") && waitingForOrbot) {
-                    // Reset `waitingForOrbot`.
+                    // Reset the waiting for Orbot status.
                     waitingForOrbot = false;
 
-                    // Load `formattedUrlString
-                    loadUrl(formattedUrlString);
+                    // Get the intent that started the app.
+                    Intent launchingIntent = getIntent();
+
+                    // Get the information from the intent.
+                    String launchingIntentAction = launchingIntent.getAction();
+                    Uri launchingIntentUriData = launchingIntent.getData();
+
+                    // If the intent action is a web search, perform the search.
+                    if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {
+                        // Create an encoded URL string.
+                        String encodedUrlString;
+
+                        // Sanitize the search input and convert it to a search.
+                        try {
+                            encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                        } catch (UnsupportedEncodingException exception) {
+                            encodedUrlString = "";
+                        }
+
+                        // Load the completed search URL.
+                        loadUrl(searchURL + encodedUrlString);
+                    } else if (launchingIntentUriData != null){  // Check to see if the intent contains a new URL.
+                        // Load the URL from the intent.
+                        loadUrl(launchingIntentUriData.toString());
+                    } else {  // The is no URL in the intent.
+                        // Select the homepage based on the proxy through Orbot status.
+                        if (proxyThroughOrbot) {
+                            // Load the Tor homepage.
+                            loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
+                        } else {
+                            // Load the normal homepage.
+                            loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
+                        }
+                    }
                 }
             }
         };
@@ -595,23 +437,107 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Register `orbotStatusBroadcastReceiver` on `this` context.
         this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
 
-        // Get handles for views that need to be accessed.
-        drawerLayout = findViewById(R.id.drawerlayout);
-        rootCoordinatorLayout = findViewById(R.id.root_coordinatorlayout);
-        bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
-        bookmarksTitleTextView = findViewById(R.id.bookmarks_title_textview);
+        // Instantiate the blocklist helper.
+        BlockListHelper blockListHelper = new BlockListHelper();
+
+        // Parse the block lists.
+        easyList = blockListHelper.parseBlockList(getAssets(), "blocklists/easylist.txt");
+        easyPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/easyprivacy.txt");
+        fanboysAnnoyanceList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-annoyance.txt");
+        fanboysSocialList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-social.txt");
+        ultraPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/ultraprivacy.txt");
+
+        // Get handles for views that need to be modified.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+        NavigationView navigationView = findViewById(R.id.navigationview);
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+        ViewPager webViewPager = findViewById(R.id.webviewpager);
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
         FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
-        mainWebViewRelativeLayout = findViewById(R.id.main_webview_relativelayout);
-        mainWebView = findViewById(R.id.main_webview);
-        findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
-        findOnPageEditText = findViewById(R.id.find_on_page_edittext);
-        fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
-        urlAppBarRelativeLayout = findViewById(R.id.url_app_bar_relativelayout);
-        favoriteIconImageView = findViewById(R.id.favorite_icon);
+        EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
+
+        // Listen for touches on the navigation menu.
+        navigationView.setNavigationItemSelectedListener(this);
+
+        // Get handles for the navigation menu and the back and forward menu items.  The menu is zero-based.
+        Menu navigationMenu = navigationView.getMenu();
+        MenuItem navigationCloseTabMenuItem = navigationMenu.getItem(0);
+        MenuItem navigationBackMenuItem = navigationMenu.getItem(3);
+        MenuItem navigationForwardMenuItem = navigationMenu.getItem(4);
+        MenuItem navigationHistoryMenuItem = navigationMenu.getItem(5);
+        MenuItem navigationRequestsMenuItem = navigationMenu.getItem(6);
+
+        // Initialize the web view pager adapter.
+        webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
+
+        // Set the pager adapter on the web view pager.
+        webViewPager.setAdapter(webViewPagerAdapter);
+
+        // Store up to 100 tabs in memory.
+        webViewPager.setOffscreenPageLimit(100);
+
+        // Update the web view pager every time a tab is modified.
+        webViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+            @Override
+            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+                // Do nothing.
+            }
+
+            @Override
+            public void onPageSelected(int position) {
+                // Set the current WebView.
+                setCurrentWebView(position);
+
+                // Select the corresponding tab if it does not match the currently selected page.  This will happen if the page was scrolled via swiping in the view pager.
+                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));
@@ -626,11 +552,26 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // Set the launch bookmarks activity FAB to launch the bookmarks activity.
         launchBookmarksActivityFab.setOnClickListener(v -> {
+            // Get a copy of the favorite icon bitmap.
+            Bitmap favoriteIconBitmap = currentWebView.getFavoriteOrDefaultIcon();
+
+            // Create a favorite icon byte array output stream.
+            ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+
+            // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
+
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
+
             // Create an intent to launch the bookmarks activity.
             Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
 
-            // Include the current folder with the `Intent`.
-            bookmarksIntent.putExtra("Current Folder", currentBookmarksFolder);
+            // Add the extra information to the intent.
+            bookmarksIntent.putExtra("current_url", currentWebView.getUrl());
+            bookmarksIntent.putExtra("current_title", currentWebView.getTitle());
+            bookmarksIntent.putExtra("current_folder", currentBookmarksFolder);
+            bookmarksIntent.putExtra("favorite_icon_byte_array", favoriteIconByteArray);
 
             // Make it so.
             startActivity(bookmarksIntent);
@@ -638,124 +579,20 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // Set the create new bookmark folder FAB to display an alert dialog.
         createBookmarkFolderFab.setOnClickListener(v -> {
-            // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
-            AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
-            createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
+            // Create a create bookmark folder dialog.
+            DialogFragment createBookmarkFolderDialog = CreateBookmarkFolderDialog.createBookmarkFolder(currentWebView.getFavoriteOrDefaultIcon());
+
+            // Show the create bookmark folder dialog.
+            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
         });
 
         // Set the create new bookmark FAB to display an alert dialog.
         createBookmarkFab.setOnClickListener(view -> {
-            // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
-            AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
-            createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
-        });
-
-        // Create a double-tap listener to toggle full-screen mode.
-        final GestureDetector gestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
-            // Override `onDoubleTap()`.  All other events are handled using the default settings.
-            @Override
-            public boolean onDoubleTap(MotionEvent event) {
-                if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
-                    // Toggle `inFullScreenBrowsingMode`.
-                    inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
-
-                    if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
-                        // Hide the `appBar`.
-                        appBar.hide();
-
-                        // Hide the banner ad in the free flavor.
-                        if (BuildConfig.FLAVOR.contentEquals("free")) {
-                            // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-                            AdHelper.hideAd(findViewById(R.id.adview));
-                        }
+            // Instantiate the create bookmark dialog.
+            DialogFragment createBookmarkDialog = CreateBookmarkDialog.createBookmark(currentWebView.getUrl(), currentWebView.getTitle(), currentWebView.getFavoriteOrDefaultIcon());
 
-                        // 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_id));
-                        }
-
-                        // Remove the translucent navigation bar flag if it is set.
-                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
-
-                        // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
-                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
-
-                        // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                        rootCoordinatorLayout.setSystemUiVisibility(0);
-
-                        // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-                        rootCoordinatorLayout.setFitsSystemWindows(true);
-                    }
-
-                    // Consume the double-tap.
-                    return true;
-                } else { // Do not consume the double-tap because full screen browsing mode is disabled.
-                    return false;
-                }
-            }
-        });
-
-        // Pass all touch events on `mainWebView` through `gestureDetector` to check for double-taps.
-        mainWebView.setOnTouchListener((View v, MotionEvent event) -> {
-            // Call `performClick()` on the view, which is required for accessibility.
-            v.performClick();
-
-            // Send the `event` to `gestureDetector`.
-            return gestureDetector.onTouchEvent(event);
-        });
-
-        // Update `findOnPageCountTextView`.
-        mainWebView.setFindListener(new WebView.FindListener() {
-            // Get a handle for `findOnPageCountTextView`.
-            final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
-
-            @Override
-            public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
-                if ((isDoneCounting) && (numberOfMatches == 0)) {  // There are no matches.
-                    // Set `findOnPageCountTextView` to `0/0`.
-                    findOnPageCountTextView.setText(R.string.zero_of_zero);
-                } else if (isDoneCounting) {  // There are matches.
-                    // `activeMatchOrdinal` is zero-based.
-                    int activeMatch = activeMatchOrdinal + 1;
-
-                    // 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`.
@@ -773,15 +610,15 @@ 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;
@@ -791,28 +628,25 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             }
         });
 
-        // Implement swipe to refresh
-        swipeRefreshLayout = findViewById(R.id.swipe_refreshlayout);
-        swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
-        swipeRefreshLayout.setOnRefreshListener(() -> mainWebView.reload());
+        // Implement swipe to refresh.
+        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_800);
+            swipeRefreshLayout.setProgressBackgroundColorSchemeResource(R.color.gray_850);
+        } else {
+            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.
@@ -826,7 +660,7 @@ 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.
@@ -860,19 +694,31 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
                 // Show the edit bookmark folder `AlertDialog` and name the instance `@string/edit_folder`.
-                AppCompatDialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
-                editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
+                DialogFragment editBookmarkFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
+                editBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.edit_folder));
             } else {
                 // Show the edit bookmark `AlertDialog` and name the instance `@string/edit_bookmark`.
-                AppCompatDialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
-                editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
+                DialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
+                editBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.edit_bookmark));
             }
 
             // Consume the event.
             return true;
         });
 
-        // The `DrawerListener` 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) {
@@ -888,1682 +734,1522 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             @Override
             public void onDrawerStateChanged(int newState) {
-                if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // The drawer is opening or closing.
-                    // Calculate the total blocked requests counter.
-                    int totalBlockedRequests = easyListBlockedRequests + easyPrivacyBlockedRequests + fanboysAnnoyanceListBlockedRequests + fanboysSocialBlockingListBlockedRequests +
-                            ultraPrivacyBlockedRequests + thirdPartyBlockedRequests;
-
-                    // 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(getResources().getString(R.string.requests) + " - " + totalBlockedRequests);
-
-                    // Hide the keyboard (if displayed) so we can see the navigation menu.  `0` indicates no additional flags.
-                    inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
-
-                    // Clear the focus from `urlTextBox` if it has it.
-                    urlTextBox.clearFocus();
+                if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // A drawer is opening or closing.
+                    // 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(currentWebView.getWindowToken(), 0);
+
+                    // Clear the focus from from the URL text box and the WebView.  This removes any text selection markers and context menus, which otherwise draw above the open drawers.
+                    urlEditText.clearFocus();
+                    currentWebView.clearFocus();
                 }
             }
         });
 
-        // drawerToggle creates the hamburger icon at the start of the AppBar.
-        drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
+        // Create the hamburger icon at the start of the AppBar.
+        actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
 
-        // Get a handle for the progress bar.
-        final ProgressBar progressBar = findViewById(R.id.progress_bar);
+        // Replace the header that `WebView` creates for `X-Requested-With` with a null value.  The default value is the application ID (com.stoutner.privacybrowser.standard).
+        customHeaders.put("X-Requested-With", "");
 
-        mainWebView.setWebChromeClient(new WebChromeClient() {
-            // Update the progress bar when a page is loading.
-            @Override
-            public void onProgressChanged(WebView view, int progress) {
-                // Inject the night mode CSS if night mode is enabled.
-                if (nightMode) {
-                    // `background-color: #212121` sets the background to be dark gray.  `color: #BDBDBD` sets the text color to be light gray.  `box-shadow: none` removes a lower underline on links
-                    // used by WordPress.  `text-decoration: none` removes all text underlines.  `text-shadow: none` removes text shadows, which usually have a hard coded color.
-                    // `border: none` removes all borders, which can also be used to underline text.
-                    // `a {color: #1565C0}` sets links to be a dark blue.  `!important` takes precedent over any existing sub-settings.
-                    mainWebView.evaluateJavascript("(function() {var parent = document.getElementsByTagName('head').item(0); var style = document.createElement('style'); style.type = 'text/css'; " +
-                            "style.innerHTML = '* {background-color: #212121 !important; color: #BDBDBD !important; box-shadow: none !important; text-decoration: none !important;" +
-                            "text-shadow: none !important; border: none !important;} a {color: #1565C0 !important;}'; parent.appendChild(style)})()", value -> {
-                                // Initialize a `Handler` to display `mainWebView`.
-                                Handler displayWebViewHandler = new Handler();
-
-                                // Setup a `Runnable` to display `mainWebView` after a delay to allow the CSS to be applied.
-                                Runnable displayWebViewRunnable = () -> {
-                                    // Only display `mainWebView` if the progress bar is one.  This prevents the display of the `WebView` while it is still loading.
-                                    if (progressBar.getVisibility() == View.GONE) {
-                                        mainWebView.setVisibility(View.VISIBLE);
-                                    }
-                                };
+        // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
+        PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
 
-                                // Use `displayWebViewHandler` to delay the displaying of `mainWebView` for 500 milliseconds.
-                                displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
-                            });
-                }
+        // Inflate a bare WebView to get the default user agent.  It is not used to render content on the screen.
+        @SuppressLint("InflateParams") View webViewLayout = getLayoutInflater().inflate(R.layout.bare_webview, null, false);
 
-                // Update the progress bar.
-                progressBar.setProgress(progress);
+        // Get a handle for the WebView.
+        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
 
-                // Set the visibility of the progress bar.
-                if (progress < 100) {
-                    // Show the progress bar.
-                    progressBar.setVisibility(View.VISIBLE);
-                } else {
-                    // Hide the progress bar.
-                    progressBar.setVisibility(View.GONE);
+        // Store the default user agent.
+        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
 
-                    // Display `mainWebView` if night mode is disabled.
-                    // Because of a race condition between `applyDomainSettings` and `onPageStarted`, when night mode is set by domain settings the `WebView` may be hidden even if night mode is not
-                    // currently enabled.
-                    if (!nightMode) {
-                        mainWebView.setVisibility(View.VISIBLE);
-                    }
+        // Destroy the bare WebView.
+        bareWebView.destroy();
+    }
 
-                    //Stop the swipe to refresh indicator if it is running
-                    swipeRefreshLayout.setRefreshing(false);
-                }
-            }
+    @Override
+    protected void onNewIntent(Intent intent) {
+        // Get the information from the intent.
+        String intentAction = intent.getAction();
+        Uri intentUriData = intent.getData();
 
-            // Set the favorite icon when it changes.
-            @Override
-            public void onReceivedIcon(WebView view, Bitmap icon) {
-                // Only update the favorite icon if the website has finished loading.
-                if (progressBar.getVisibility() == View.GONE) {
-                    // Save a copy of the favorite icon.
-                    favoriteIconBitmap = icon;
+        // Only process the URI if it contains data.  If the user pressed the desktop icon after the app was already running the URI will be null.
+        if (intentUriData != null) {
+            // Sets the new intent as the activity intent, which replaces the one that originally started the app.
+            setIntent(intent);
 
-                    // Place the favorite icon in the appBar.
-                    favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
-                }
-            }
+            // Add a new tab.
+            addTab(null);
 
-            // Save a copy of the title when it changes.
-            @Override
-            public void onReceivedTitle(WebView view, String title) {
-                // Save a copy of the title.
-                webViewTitle = title;
-            }
+            // Create a URL string.
+            String url;
 
-            // Enter full screen video.
-            @Override
-            public void onShowCustomView(View view, CustomViewCallback callback) {
-                // Set the full screen video flag.
-                displayingFullScreenVideo = true;
+            // 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;
 
-                // 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));
+                // Sanitize the search input and convert it to a search.
+                try {
+                    encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                } catch (UnsupportedEncodingException exception) {
+                    encodedUrlString = "";
                 }
 
-                // 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);
+                // Add the base search URL.
+                url = searchURL + encodedUrlString;
+            } else {  // The intent should contain a URL.
+                // Set the intent data as the URL.
+                url = intentUriData.toString();
+            }
 
-                // Set `rootCoordinatorLayout` to fill the entire screen.
-                rootCoordinatorLayout.setFitsSystemWindows(false);
+            // Load the URL.
+            loadUrl(url);
 
-                // Disable the sliding drawers.
-                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
+            // Get a handle for the drawer layout.
+            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-                // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
-                fullScreenVideoFrameLayout.addView(view);
-                fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
+            // Close the navigation drawer if it is open.
+            if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
+                drawerLayout.closeDrawer(GravityCompat.START);
             }
 
-            // Exit full screen video.
-            @Override
-            public void onHideCustomView() {
-                // Unset the full screen video flag.
-                displayingFullScreenVideo = true;
-
-                // Hide `fullScreenVideoFrameLayout`.
-                fullScreenVideoFrameLayout.removeAllViews();
-                fullScreenVideoFrameLayout.setVisibility(View.GONE);
-
-                // Enable the sliding drawers.
-                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
-
-                // 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);
+            // Close the bookmarks drawer if it is open.
+            if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
+                drawerLayout.closeDrawer(GravityCompat.END);
+            }
 
-                        // Remove the translucent status bar overlay.
-                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
+            currentWebView.requestFocus();
+        }
+    }
 
-                        // 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);
+    @Override
+    public void onRestart() {
+        // Run the default commands.
+        super.onRestart();
 
-                        /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-                         * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-                         * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
-                         */
-                        rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-                    } else {  // Hide everything except the status and navigation bars.
-                        // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                        rootCoordinatorLayout.setSystemUiVisibility(0);
+        // Make 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");
 
-                        // Add the translucent status flag if it is unset.
-                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            // Send the intent to the Orbot package.
+            orbotIntent.setPackage("org.torproject.android");
 
-                        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();
-                    }
+            // Make it so.
+            sendBroadcast(orbotIntent);
+        }
 
-                    // 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.ad_id));
-                    }
+        // Apply the app settings if returning from the Settings activity.
+        if (reapplyAppSettingsOnRestart) {
+            // Apply the app settings.
+            applyAppSettings();
 
-                    // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-                    rootCoordinatorLayout.setSystemUiVisibility(0);
+            // Reload the webpage to handle changes to night mode and displaying of images.
+            if (reloadOnRestart) {
+                // Reload the WebViews.
+                for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                    // Get the WebView tab fragment.
+                    WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                    // Remove the translucent navigation bar flag if it is set.
-                    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+                    // Get the fragment view.
+                    View fragmentView = webViewTabFragment.getView();
 
-                    // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
-                    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                    // Only reload the WebViews if they exist.
+                    if (fragmentView != null) {
+                        // Get the nested scroll WebView from the tab fragment.
+                        NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-                    // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-                    rootCoordinatorLayout.setFitsSystemWindows(true);
+                        // Reload the WebView.  This doesn't seem to work if for WebViews that aren't visible.
+                        nestedScrollWebView.reload();
+                    }
                 }
 
-                // 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_id));
-                }
+                // Reset `reloadOnRestartBoolean`.
+                reloadOnRestart = false;
             }
 
-            // 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;
+            // Reset the return from settings flag.
+            reapplyAppSettingsOnRestart = false;
+        }
 
-                    // Create an intent to open a chooser based ont the file chooser parameters.
-                    Intent fileChooserIntent = fileChooserParams.createIntent();
+        // TODO apply to all the tabs.
+        // Apply the domain settings if returning from the Domains activity.
+        if (reapplyDomainSettingsOnRestart) {
+            // Reset the current domain name so the domain settings will be reapplied.
+            currentWebView.resetCurrentDomainName();
 
-                    // 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;
-            }
-        });
+            // Reapply the domain settings.
+            applyDomainSettings(currentWebView, currentWebView.getUrl(), false, true);  // TODO.
 
-        // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
-        registerForContextMenu(mainWebView);
+            // Reset the reapply domain settings on restart tracker.
+            reapplyDomainSettingsOnRestart = false;
+        }
 
-        // Allow the downloading of files.
-        mainWebView.setDownloadListener((String url, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
-            // 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 WRITE_EXTERNAL_STORAGE permission needs to be requested.
-
-                // Store the variables for future use by `onRequestPermissionsResult()`.
-                downloadUrl = url;
-                downloadContentDisposition = contentDisposition;
-                downloadContentLength = contentLength;
-
-                // 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.
-                    // Get a handle for 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(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 WRITE_EXTERNAL_STORAGE permission has already been granted.
-                // Get a handle for the download file alert dialog.
-                AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
+        // Load the URL on restart (used when loading a bookmark.
+        if (loadUrlOnRestart) {
+            // Load the specified URL.
+            loadUrl(urlToLoadOnRestart);
 
-                // Show the download file alert dialog.
-                downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
-            }
-        });
+            // Reset the load on restart tracker.
+            loadUrlOnRestart = false;
+        }
 
-        // Allow pinch to zoom.
-        mainWebView.getSettings().setBuiltInZoomControls(true);
+        // Update the bookmarks drawer if returning from the Bookmarks activity.
+        if (restartFromBookmarksActivity) {
+            // Get a handle for the drawer layout.
+            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-        // Hide zoom controls.
-        mainWebView.getSettings().setDisplayZoomControls(false);
+            // Close the bookmarks drawer.
+            drawerLayout.closeDrawer(GravityCompat.END);
 
-        // Set `mainWebView` to use a wide viewport.  Otherwise, some web pages will be scrunched and some content will render outside the screen.
-        mainWebView.getSettings().setUseWideViewPort(true);
+            // Reload the bookmarks drawer.
+            loadBookmarksFolder();
 
-        // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
-        mainWebView.getSettings().setLoadWithOverviewMode(true);
+            // Reset `restartFromBookmarksActivity`.
+            restartFromBookmarksActivity = false;
+        }
 
-        // Explicitly disable geolocation.
-        mainWebView.getSettings().setGeolocationEnabled(false);
+        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
+        updatePrivacyIcons(true);
+    }
 
-        // Initialize cookieManager.
-        cookieManager = CookieManager.getInstance();
+    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
+    @Override
+    public void onResume() {
+        // Run the default commands.
+        super.onResume();
 
-        // Replace the header that `WebView` creates for `X-Requested-With` with a null value.  The default value is the application ID (com.stoutner.privacybrowser.standard).
-        customHeaders.put("X-Requested-With", "");
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-        // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
-        PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-        // Get the intent that started the app.
-        final Intent launchingIntent = getIntent();
+            // 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);
 
-        // Extract the launching intent data as `launchingIntentUriData`.
-        final Uri launchingIntentUriData = launchingIntent.getData();
+                // Resume the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.resumeTimers();
 
-        // Convert the launching intent URI data (if it exists) to a string and store it in `formattedUrlString`.
-        if (launchingIntentUriData != null) {
-            formattedUrlString = launchingIntentUriData.toString();
+                // Resume the nested scroll WebView.
+                nestedScrollWebView.onResume();
+            }
         }
 
-        // Get a handle for the `Runtime`.
-        privacyBrowserRuntime = Runtime.getRuntime();
+        // 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);
+
+            // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
+            currentWebView.loadData("<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>", "text/html", null);
+        }
 
-        // 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`.
+        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
+            // Get a handle for the root frame layouts.
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
 
-        // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
-        inFullScreenBrowsingMode = 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);
 
-        // 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;
+            /* Hide the system bars.
+             * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+             * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+             */
+            rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                    View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+        } else if (BuildConfig.FLAVOR.contentEquals("free")) {  // Resume the adView for the free flavor.
+            // Resume the ad.
+            AdHelper.resumeAd(findViewById(R.id.adview));
+        }
+    }
 
-        // Initialize the WebView title.
-        webViewTitle = getString(R.string.no_title);
+    @Override
+    public void onPause() {
+        // Run the default commands.
+        super.onPause();
 
-        // 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();
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-        // If the favorite icon is null, load the default.
-        if (favoriteIconBitmap == null) {
-            favoriteIconBitmap = favoriteIconDefaultBitmap;
-        }
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-        // Initialize the user agent array adapter and string array.
-        userAgentNamesArray = ArrayAdapter.createFromResource(this, R.array.user_agent_names, R.layout.domain_settings_spinner_item);
-        userAgentDataArray = getResources().getStringArray(R.array.user_agent_data);
+            // 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);
 
-        // Apply the app settings from the shared preferences.
-        applyAppSettings();
+                // Pause the nested scroll WebView.
+                nestedScrollWebView.onPause();
 
-        // Instantiate the block list helper.
-        BlockListHelper blockListHelper = new BlockListHelper();
+                // Pause the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.pauseTimers();
+            }
+        }
 
-        // Initialize the list of resource requests.
-        resourceRequests = new ArrayList<>();
+        // 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));
+        }
+    }
 
-        // Parse the block lists.
-        final ArrayList<List<String[]>> easyList = blockListHelper.parseBlockList(getAssets(), "blocklists/easylist.txt");
-        final ArrayList<List<String[]>> easyPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/easyprivacy.txt");
-        final ArrayList<List<String[]>> fanboysAnnoyanceList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-annoyance.txt");
-        final ArrayList<List<String[]>> fanboysSocialList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-social.txt");
-        final ArrayList<List<String[]>> ultraPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/ultraprivacy.txt");
-
-        // Store the list versions.
-        easyListVersion = easyList.get(0).get(0)[0];
-        easyPrivacyVersion = easyPrivacy.get(0).get(0)[0];
-        fanboysAnnoyanceVersion = fanboysAnnoyanceList.get(0).get(0)[0];
-        fanboysSocialVersion = fanboysSocialList.get(0).get(0)[0];
-        ultraPrivacyVersion = ultraPrivacy.get(0).get(0)[0];
-
-        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 = "";
+    @Override
+    public void onDestroy() {
+        // Unregister the Orbot status broadcast receiver.
+        this.unregisterReceiver(orbotStatusBroadcastReceiver);
 
-                    // Apply the domain settings for the new URL.  `applyDomainSettings` doesn't do anything if the domain has not changed.
-                    applyDomainSettings(url, true, false);
+        // Close the bookmarks cursor and database.
+        bookmarksCursor.close();
+        bookmarksDatabaseHelper.close();
 
-                    // Returning false causes the current WebView to handle the URL and prevents it from adding redirects to the history list.
-                    return false;
-                } else if (url.startsWith("mailto:")) {  // Load the email address in an external email program.
-                    // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
-                    Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
+        // Run the default commands.
+        super.onDestroy();
+    }
 
-                    // Parse the url and set it as the data for the intent.
-                    emailIntent.setData(Uri.parse(url));
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        // Inflate the menu.  This adds items to the action bar if it is present.
+        getMenuInflater().inflate(R.menu.webview_options_menu, menu);
 
-                    // Open the email program in a new task instead of as part of Privacy Browser.
-                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
+        optionsMenu = menu;
 
-                    // Make it so.
-                    startActivity(emailIntent);
+        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
+        updatePrivacyIcons(false);
 
-                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
-                    return true;
-                } else if (url.startsWith("tel:")) {  // Load the phone number in the dialer.
-                    // Open the dialer and load the phone number, but wait for the user to place the call.
-                    Intent dialIntent = new Intent(Intent.ACTION_DIAL);
+        // Get handles for the menu items.
+        MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
+        MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
+        MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
+        MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
+        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
+        MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
+        MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
 
-                    // Add the phone number to the intent.
-                    dialIntent.setData(Uri.parse(url));
+        // Only display third-party cookies if API >= 21
+        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 
-                    // Open the dialer in a new task instead of as part of Privacy Browser.
-                    dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // 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);
 
-                    // Make it so.
-                    startActivity(dialIntent);
+        // Disable the clear form data menu item if the API >= 26 so that the status of the main Clear Data is calculated correctly.
+        clearFormDataMenuItem.setEnabled(Build.VERSION.SDK_INT < 26);
 
-                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
-                    return true;
-                } else {  // Load a system chooser to select an app that can handle the URL.
-                    // Open an app that can handle the URL.
-                    Intent genericIntent = new Intent(Intent.ACTION_VIEW);
+        // Only show Ad Consent if this is the free flavor.
+        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
 
-                    // Add the URL to the intent.
-                    genericIntent.setData(Uri.parse(url));
+        // Get the shared preference values.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // List all apps that can handle the URL instead of just opening the first one.
-                    genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
+        // Get the dark theme and app bar preferences..
+        boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-                    // Open the app in a new task instead of as part of Privacy Browser.
-                    genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // Set the status of the additional app bar icons.  Setting the refresh menu item to `SHOW_AS_ACTION_ALWAYS` makes it appear even on small devices like phones.
+        if (displayAdditionalAppBarIcons) {
+            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+            refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
+        } else { //Do not display the additional icons.
+            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+            refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+        }
 
-                    // Start the app or display a snackbar if no app is available to handle the URL.
-                    try {
-                        startActivity(genericIntent);
-                    } catch (ActivityNotFoundException exception) {
-                        Snackbar.make(mainWebView, getString(R.string.unrecognized_url) + "  " + url, Snackbar.LENGTH_SHORT).show();
-                    }
+        // Replace Refresh with Stop if a URL is already loading.
+        if (currentWebView != null && currentWebView.getProgress() != 100) {
+            // Set the title.
+            refreshMenuItem.setTitle(R.string.stop);
 
-                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
-                    return true;
+            // If the icon is displayed in the AppBar, set it according to the theme.
+            if (displayAdditionalAppBarIcons) {
+                if (darkTheme) {
+                    refreshMenuItem.setIcon(R.drawable.close_dark);
+                } else {
+                    refreshMenuItem.setIcon(R.drawable.close_light);
                 }
             }
+        }
 
-            // Check requests against the block lists.  The deprecated `shouldInterceptRequest()` must be used until minimum API >= 21.
-            @SuppressWarnings("deprecation")
-            @Override
-            public WebResourceResponse shouldInterceptRequest(WebView view, String url){
-                // Create an empty web resource response to be used if the resource request is blocked.
-                WebResourceResponse emptyWebResourceResponse = new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
+        return true;
+    }
 
-                // Reset the whitelist results tracker.
-                whiteListResultStringArray = null;
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        // Get handles for the menu items.
+        MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
+        MenuItem firstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
+        MenuItem thirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
+        MenuItem domStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
+        MenuItem saveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
+        MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
+        MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
+        MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
+        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
+        MenuItem blocklistsMenuItem = menu.findItem(R.id.blocklists);
+        MenuItem easyListMenuItem = menu.findItem(R.id.easylist);
+        MenuItem easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
+        MenuItem fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
+        MenuItem fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
+        MenuItem ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
+        MenuItem blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
+        MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
+        MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
+        MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
+        MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
+        MenuItem proxyThroughOrbotMenuItem = menu.findItem(R.id.proxy_through_orbot);
 
-                // Initialize the third party request tracker.
-                boolean isThirdPartyRequest = false;
+        // Get a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
 
-                // Initialize the current domain string.
-                String currentDomain = "";
+        // Initialize the current user agent string and the font size.
+        String currentUserAgent = getString(R.string.user_agent_privacy_browser);
+        int fontSize = 100;
 
-                // 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);
+        // 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);
+            }
 
-                    // Get the domain host names.
-                    String currentBaseDomain = currentDomainUri.getHost();
-                    String requestBaseDomain = requestDomainUri.getHost();
+            // Get the current user agent from the WebView.
+            currentUserAgent = currentWebView.getSettings().getUserAgentString();
+
+            // Get the current font size from the
+            fontSize = currentWebView.getSettings().getTextZoom();
+
+            // Set the status of the menu item checkboxes.
+            domStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
+            saveFormDataMenuItem.setChecked(currentWebView.getSettings().getSaveFormData());  // Form data can be removed once the minimum API >= 26.
+            easyListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
+            easyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
+            fanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+            fanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+            ultraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
+            blockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+            swipeToRefreshMenuItem.setChecked(currentWebView.getSwipeToRefresh());
+            displayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
+            nightModeMenuItem.setChecked(currentWebView.getNightMode());
+
+            // Initialize the display names for the blocklists with the number of blocked requests.
+            blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+            easyListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASY_LIST) + " - " + getString(R.string.easylist));
+            easyPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASY_PRIVACY) + " - " + getString(R.string.easyprivacy));
+            fanboysAnnoyanceListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " + getString(R.string.fanboys_annoyance_list));
+            fanboysSocialBlockingListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " + getString(R.string.fanboys_social_blocking_list));
+            ultraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRA_PRIVACY) + " - " + getString(R.string.ultraprivacy));
+            blockAllThirdPartyRequestsMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " + getString(R.string.block_all_third_party_requests));
+
+            // Only modify third-party cookies if the API >= 21.
+            if (Build.VERSION.SDK_INT >= 21) {
+                // Set the status of the third-party cookies checkbox.
+                thirdPartyCookiesMenuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
+
+                // Enable third-party cookies if first-party cookies are enabled.
+                thirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
+            }
 
-                    // Update the current domain variable.
-                    currentDomain = currentBaseDomain;
+            // Enable DOM Storage if JavaScript is enabled.
+            domStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
+        }
 
-                    // 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 menu item checkboxes.
+        firstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
+        proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
 
-                        // Determine the request base domain.
-                        while (requestBaseDomain.indexOf(".", requestBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
-                            // Remove the first subdomain.
-                            requestBaseDomain = requestBaseDomain.substring(requestBaseDomain.indexOf(".") + 1);
-                        }
+        // Enable Clear Cookies if there are any.
+        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
 
-                        // Update the third party request tracker.
-                        isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
-                    }
-                }
+        // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
+        String privateDataDirectoryString = getApplicationInfo().dataDir;
 
-                // Block third-party requests if enabled.
-                if (isThirdPartyRequest && blockAllThirdPartyRequests) {
-                    // Increment the third-party blocked requests counter.
-                    thirdPartyBlockedRequests++;
+        // 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;
+        }
 
-                    // Add the request to the log.
-                    resourceRequests.add(new String[]{String.valueOf(REQUEST_THIRD_PARTY), url});
+        // 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;
+        }
 
-                    // Return an empty web resource response.
-                    return emptyWebResourceResponse;
-                }
+        // Enable Clear DOM Storage if there is any.
+        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
 
-                // Check UltraPrivacy if it is enabled.
-                if (ultraPrivacyEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, ultraPrivacy)) {
-                        // Increment the UltraPrivacy blocked requests counter.
-                        ultraPrivacyBlockedRequests++;
+        // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
+        if (Build.VERSION.SDK_INT < 26) {
+            // Get the WebView database.
+            WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
+            // Enable the clear form data menu item if there is anything to clear.
+            clearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
+        }
 
-                    // If the whitelist result is not null, the request has been allowed by UltraPrivacy.
-                    if (whiteListResultStringArray != null) {
-                        // Add a whitelist entry to the resource requests array.
-                        resourceRequests.add(whiteListResultStringArray);
+        // Enable Clear Data if any of the submenu items are enabled.
+        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
 
-                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
-                        return null;
-                    }
-                }
+        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
+        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
+
+        // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
+        if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
+            menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
+        } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
+            menu.findItem(R.id.user_agent_webview_default).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
+            menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
+            menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
+            menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
+            menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
+            menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
+            menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
+            menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
+            menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
+            menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
+            menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
+        } else {  // Custom user agent.
+            menu.findItem(R.id.user_agent_custom).setChecked(true);
+        }
 
-                // Check EasyList if it is enabled.
-                if (easyListEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyList)) {
-                        // Increment the EasyList blocked requests counter.
-                        easyListBlockedRequests++;
+        // Instantiate the font size title and the selected font size menu item.
+        String fontSizeTitle;
+        MenuItem selectedFontSizeMenuItem;
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+        // Prepare the font size title and current size menu item.
+        switch (fontSize) {
+            case 25:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
+                break;
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                }
+            case 50:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
+                break;
 
-                // Check EasyPrivacy if it is enabled.
-                if (easyPrivacyEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyPrivacy)) {
-                        // Increment the EasyPrivacy blocked requests counter.
-                        easyPrivacyBlockedRequests++;
+            case 75:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
+                break;
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+            case 100:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+                break;
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                }
+            case 125:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
+                break;
 
-                // Check Fanboy’s Annoyance List if it is enabled.
-                if (fanboysAnnoyanceListEnabled) {
-                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList)) {
-                        // Increment the Fanboy's Annoyance List blocked requests counter.
-                        fanboysAnnoyanceListBlockedRequests++;
+            case 150:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
+                break;
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+            case 175:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
+                break;
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                } 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 Fanboy's Social Blocking List blocked requests counter.
-                        fanboysSocialBlockingListBlockedRequests++;
+            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;
 
-                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
-                        whiteListResultStringArray = null;
+            default:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+                break;
+        }
 
-                        // The resource request was blocked.  Return an empty web resource response.
-                        return emptyWebResourceResponse;
-                    }
-                }
+        // Set the font size title and select the current size menu item.
+        fontSizeMenuItem.setTitle(fontSizeTitle);
+        selectedFontSizeMenuItem.setChecked(true);
 
-                // Add the request to the log because it hasn't been processed by any of the previous checks.
-                if (whiteListResultStringArray != null ) {  // The request was processed by a whitelist.
-                    resourceRequests.add(whiteListResultStringArray);
-                } else {  // The request didn't match any blocklist entry.  Log it as a defult request.
-                    resourceRequests.add(new String[]{String.valueOf(REQUEST_DEFAULT), url});
-                }
+        // Run all the other default commands.
+        super.onPrepareOptionsMenu(menu);
 
-                // The resource request has not been blocked.  `return null` loads the requested resource.
-                return null;
-            }
+        // Display the menu.
+        return true;
+    }
 
-            // Handle HTTP authentication requests.
-            @Override
-            public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
-                // Store `handler` so it can be accessed from `onHttpAuthenticationCancel()` and `onHttpAuthenticationProceed()`.
-                httpAuthHandler = handler;
+    @Override
+    // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
+    @SuppressLint("SetJavaScriptEnabled")
+    public boolean onOptionsItemSelected(MenuItem menuItem) {
+        // Reenter full screen browsing mode if it was interrupted by the options menu.  <https://redmine.stoutner.com/issues/389>
+        if (inFullScreenBrowsingMode) {
+            // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
-                // Display the HTTP authentication dialog.
-                AppCompatDialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
-                httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
-            }
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
 
-            // 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();
+            /* 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);
+        }
+
+        // Get the selected menu item ID.
+        int menuItemId = menuItem.getItemId();
 
-                // Initialize the counters for requests blocked by each blocklist.
-                easyListBlockedRequests = 0;
-                easyPrivacyBlockedRequests = 0;
-                fanboysAnnoyanceListBlockedRequests = 0;
-                fanboysSocialBlockingListBlockedRequests = 0;
-                ultraPrivacyBlockedRequests = 0;
-                thirdPartyBlockedRequests = 0;
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
-                if (nightMode) {
-                    mainWebView.setVisibility(View.INVISIBLE);
+        // Get a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
+
+        // 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());
+
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
+
+                // Display a `Snackbar`.
+                if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
+                } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
+                } else {  // Privacy mode.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
                 }
 
-                // Hide the keyboard.  `0` indicates no additional flags.
-                inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                // Check to see if Privacy Browser is waiting on Orbot.
-                if (!waitingForOrbot) {  // We are not waiting on Orbot, so we need to process the URL.
-                    // We need to update `formattedUrlString` at the beginning of the load, so that if the user toggles JavaScript during the load the new website is reloaded.
-                    formattedUrlString = url;
+            case R.id.add_or_edit_domain:
+                if (currentWebView.getDomainSettingsApplied()) {  // Edit the current domain settings.
+                    // Reapply the domain settings on returning to `MainWebViewActivity`.
+                    reapplyDomainSettingsOnRestart = true;
 
-                    // Display the formatted URL text.
-                    urlTextBox.setText(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();
 
-                    // Apply text highlighting to `urlTextBox`.
-                    highlightUrlText();
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-                    // Apply any custom domain settings if the URL was loaded by navigating history.
-                    if (navigatingHistory) {
-                        // Reset `navigatingHistory`.
-                        navigatingHistory = false;
+                    // Add the extra information to the intent.
+                    domainsIntent.putExtra("load_domain", currentWebView.getDomainSettingsDatabaseId());
+                    domainsIntent.putExtra("close_on_back", true);
+                    domainsIntent.putExtra("current_url", currentWebView.getUrl());
 
-                        // Apply the domain settings.
-                        applyDomainSettings(url, true, false);
-                    }
+                    // Make it so.
+                    startActivity(domainsIntent);
+                } else {  // Add a new domain.
+                    // Apply the new domain settings on returning to `MainWebViewActivity`.
+                    reapplyDomainSettingsOnRestart = true;
 
-                    // Set `urlIsLoading` to `true`, so that redirects while loading do not trigger changes in the user agent, which forces another reload of the existing page.
-                    urlIsLoading = true;
-                }
-            }
+                    // Get the current domain
+                    Uri currentUri = Uri.parse(currentWebView.getUrl());
+                    String currentDomain = currentUri.getHost();
 
-            // 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) {
-                // 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();
-                }
+                    // 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);
 
-                // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
-                urlIsLoading = false;
+                    // Create the domain and store the database ID.
+                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
 
-                // Clear the cache and history if Incognito Mode is enabled.
-                if (incognitoModeEnabled) {
-                    // Clear the cache.  `true` includes disk files.
-                    mainWebView.clearCache(true);
+                    // 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();
 
-                    // Clear the back/forward history.
-                    mainWebView.clearHistory();
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-                    // Manually delete cache folders.
-                    try {
-                        // Delete the main cache directory.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+                    // Add the extra information to the intent.
+                    domainsIntent.putExtra("load_domain", newDomainDatabaseId);
+                    domainsIntent.putExtra("close_on_back", true);
+                    domainsIntent.putExtra("current_url", currentWebView.getUrl());
 
-                        // 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.
-                    }
+                    // Make it so.
+                    startActivity(domainsIntent);
                 }
+                return true;
 
-                // 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 = "";
+            case R.id.toggle_first_party_cookies:
+                // Switch the first-party cookie status.
+                cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
 
-                        urlTextBox.setText(formattedUrlString);
+                // Store the first-party cookie status.
+                currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
 
-                        // Request focus for `urlTextBox`.
-                        urlTextBox.requestFocus();
+                // Update the menu checkbox.
+                menuItem.setChecked(cookieManager.acceptCookie());
 
-                        // Display the keyboard.
-                        inputMethodManager.showSoftInput(urlTextBox, 0);
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(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;
+                // Display a snackbar.
+                if (cookieManager.acceptCookie()) {  // First-party cookies are enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
+                } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is still enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
+                } else {  // Privacy mode.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
+                }
 
-                        // Only update `urlTextBox` if the user is not typing in it.
-                        if (!urlTextBox.hasFocus()) {
-                            // Display the formatted URL text.
-                            urlTextBox.setText(formattedUrlString);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                            // Apply text highlighting to `urlTextBox`.
-                            highlightUrlText();
-                        }
-                    }
+            case R.id.toggle_third_party_cookies:
+                if (Build.VERSION.SDK_INT >= 21) {
+                    // Switch the status of thirdPartyCookiesEnabled.
+                    cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
 
-                    // Store the SSL certificate so it can be accessed from `ViewSslCertificateDialog` and `PinnedSslCertificateMismatchDialog`.
-                    sslCertificate = mainWebView.getCertificate();
-
-                    // Check the current website SSL certificate against the pinned SSL certificate if there is a pinned SSL certificate the user has not chosen to ignore it for this session.
-                    if (pinnedDomainSslCertificate && !ignorePinnedSslCertificate) {
-                        // Initialize the current SSL certificate variables.
-                        String currentWebsiteIssuedToCName = "";
-                        String currentWebsiteIssuedToOName = "";
-                        String currentWebsiteIssuedToUName = "";
-                        String currentWebsiteIssuedByCName = "";
-                        String currentWebsiteIssuedByOName = "";
-                        String currentWebsiteIssuedByUName = "";
-                        Date currentWebsiteSslStartDate = null;
-                        Date currentWebsiteSslEndDate = null;
-
-
-                        // Extract the individual pieces of information from the current website SSL certificate if it is not null.
-                        if (sslCertificate != null) {
-                            currentWebsiteIssuedToCName = sslCertificate.getIssuedTo().getCName();
-                            currentWebsiteIssuedToOName = sslCertificate.getIssuedTo().getOName();
-                            currentWebsiteIssuedToUName = sslCertificate.getIssuedTo().getUName();
-                            currentWebsiteIssuedByCName = sslCertificate.getIssuedBy().getCName();
-                            currentWebsiteIssuedByOName = sslCertificate.getIssuedBy().getOName();
-                            currentWebsiteIssuedByUName = sslCertificate.getIssuedBy().getUName();
-                            currentWebsiteSslStartDate = sslCertificate.getValidNotBeforeDate();
-                            currentWebsiteSslEndDate = sslCertificate.getValidNotAfterDate();
-                        }
+                    // Update the menu checkbox.
+                    menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
 
-                        // 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 (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();
+                    }
 
-                        // Convert the `Dates` to `Strings` if they are not `null`.
-                        if (currentWebsiteSslStartDate != null) {
-                            currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString();
-                        }
+                    // Reload the current WebView.
+                    currentWebView.reload();
+                } // Else do nothing because SDK < 21.
+                return true;
 
-                        if (currentWebsiteSslEndDate != null) {
-                            currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString();
-                        }
+            case R.id.toggle_dom_storage:
+                // Toggle the status of domStorageEnabled.
+                currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
 
-                        if (pinnedDomainSslStartDate != null) {
-                            pinnedDomainSslStartDateString = pinnedDomainSslStartDate.toString();
-                        }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
 
-                        if (pinnedDomainSslEndDate != null) {
-                            pinnedDomainSslEndDateString = pinnedDomainSslEndDate.toString();
-                        }
+                // Update the privacy icon.  `true` refreshes the app bar icons.
+                updatePrivacyIcons(true);
 
-                        // Check to see if the pinned SSL certificate matches the current website certificate.
-                        if (!currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) || !currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) ||
-                                !currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) || !currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) ||
-                                !currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) || !currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) ||
-                                !currentWebsiteSslStartDateString.equals(pinnedDomainSslStartDateString) || !currentWebsiteSslEndDateString.equals(pinnedDomainSslEndDateString)) {
-                            // The pinned SSL certificate doesn't match the current domain certificate.
-                            //Display the pinned SSL certificate mismatch `AlertDialog`.
-                            AppCompatDialogFragment pinnedSslCertificateMismatchDialogFragment = new PinnedSslCertificateMismatchDialog();
-                            pinnedSslCertificateMismatchDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_mismatch));
-                        }
-                    }
+                // Display a snackbar.
+                if (currentWebView.getSettings().getDomStorageEnabled()) {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
+                } else {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
                 }
-            }
 
-            // Handle SSL Certificate errors.
-            @Override
-            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
-                // Get the current website SSL certificate.
-                SslCertificate currentWebsiteSslCertificate = error.getCertificate();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-                // Extract the individual pieces of information from the current website SSL certificate.
-                String currentWebsiteIssuedToCName = currentWebsiteSslCertificate.getIssuedTo().getCName();
-                String currentWebsiteIssuedToOName = currentWebsiteSslCertificate.getIssuedTo().getOName();
-                String currentWebsiteIssuedToUName = currentWebsiteSslCertificate.getIssuedTo().getUName();
-                String currentWebsiteIssuedByCName = currentWebsiteSslCertificate.getIssuedBy().getCName();
-                String currentWebsiteIssuedByOName = currentWebsiteSslCertificate.getIssuedBy().getOName();
-                String currentWebsiteIssuedByUName = currentWebsiteSslCertificate.getIssuedBy().getUName();
-                Date currentWebsiteSslStartDate = currentWebsiteSslCertificate.getValidNotBeforeDate();
-                Date currentWebsiteSslEndDate = currentWebsiteSslCertificate.getValidNotAfterDate();
+            // Form data can be removed once the minimum API >= 26.
+            case R.id.toggle_save_form_data:
+                // Switch the status of saveFormDataEnabled.
+                currentWebView.getSettings().setSaveFormData(!currentWebView.getSettings().getSaveFormData());
 
-                // 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().getSaveFormData());
 
-                    // Display the SSL error `AlertDialog`.
-                    AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
-                    sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
+                // Display a snackbar.
+                if (currentWebView.getSettings().getSaveFormData()) {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
+                } else {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
                 }
-            }
-        });
 
-        // Load the website if not waiting for Orbot to connect.
-        if (!waitingForOrbot) {
-            loadUrl(formattedUrlString);
-        }
-    }
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(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);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Check to see if the intent contains a new URL.
-        if (intent.getData() != null) {
-            // Get the intent data.
-            final Uri intentUriData = intent.getData();
+            case R.id.clear_cookies:
+                Snackbar.make(findViewById(R.id.webviewpager), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
+                        .setAction(R.string.undo, v -> {
+                            // Do nothing because everything will be handled by `onDismissed()` below.
+                        })
+                        .addCallback(new Snackbar.Callback() {
+                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
+                            @Override
+                            public void onDismissed(Snackbar snackbar, int event) {
+                                if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
+                                    // Delete the cookies, which command varies by SDK.
+                                    if (Build.VERSION.SDK_INT < 21) {
+                                        cookieManager.removeAllCookie();
+                                    } else {
+                                        cookieManager.removeAllCookies(null);
+                                    }
+                                }
+                            }
+                        })
+                        .show();
+                return true;
 
-            // Load the website.
-            loadUrl(intentUriData.toString());
+            case R.id.clear_dom_storage:
+                Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
+                        .setAction(R.string.undo, v -> {
+                            // Do nothing because everything will be handled by `onDismissed()` below.
+                        })
+                        .addCallback(new Snackbar.Callback() {
+                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
+                            @Override
+                            public void onDismissed(Snackbar snackbar, int event) {
+                                if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
+                                    // Delete the DOM Storage.
+                                    WebStorage webStorage = WebStorage.getInstance();
+                                    webStorage.deleteAllData();
 
-            // Close the navigation drawer if it is open.
-            if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
-                drawerLayout.closeDrawer(GravityCompat.START);
-            }
+                                    // Initialize a handler to manually delete the DOM storage files and directories.
+                                    Handler deleteDomStorageHandler = new Handler();
 
-            // Close the bookmarks drawer if it is open.
-            if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
-                drawerLayout.closeDrawer(GravityCompat.END);
-            }
+                                    // Setup a runnable to manually delete the DOM storage files and directories.
+                                    Runnable deleteDomStorageRunnable = () -> {
+                                        try {
+                                            // Get a handle for the runtime.
+                                            Runtime runtime = Runtime.getRuntime();
 
-            // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
-            mainWebView.requestFocus();
-        }
-    }
+                                            // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
+                                            // which links to `/data/data/com.stoutner.privacybrowser.standard`.
+                                            String privateDataDirectoryString = getApplicationInfo().dataDir;
 
-    @Override
-    public void onRestart() {
-        // Run the default commands.
-        super.onRestart();
+                                            // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                                            Process deleteLocalStorageProcess = runtime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
 
-        // 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");
+                                            // Multiple commands must be used because `Runtime.exec()` does not like `*`.
+                                            Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
+                                            Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
+                                            Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
+                                            Process deleteDatabasesProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
+
+                                            // Wait for the processes to finish.
+                                            deleteLocalStorageProcess.waitFor();
+                                            deleteIndexProcess.waitFor();
+                                            deleteQuotaManagerProcess.waitFor();
+                                            deleteQuotaManagerJournalProcess.waitFor();
+                                            deleteDatabasesProcess.waitFor();
+                                        } catch (Exception exception) {
+                                            // Do nothing if an error is thrown.
+                                        }
+                                    };
 
-            // Send the intent to the Orbot package.
-            orbotIntent.setPackage("org.torproject.android");
+                                    // Manually delete the DOM storage files after 200 milliseconds.
+                                    deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
+                                }
+                            }
+                        })
+                        .show();
+                return true;
 
-            // Make it so.
-            sendBroadcast(orbotIntent);
-        }
+            // Form data can be remove once the minimum API >= 26.
+            case R.id.clear_form_data:
+                Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
+                        .setAction(R.string.undo, v -> {
+                            // Do nothing because everything will be handled by `onDismissed()` below.
+                        })
+                        .addCallback(new Snackbar.Callback() {
+                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
+                            @Override
+                            public void onDismissed(Snackbar snackbar, int event) {
+                                if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
+                                    // Delete the form data.
+                                    WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
+                                    mainWebViewDatabase.clearFormData();
+                                }
+                            }
+                        })
+                        .show();
+                return true;
 
-        // Apply the app settings if returning from the Settings activity..
-        if (reapplyAppSettingsOnRestart) {
-            // Apply the app settings.
-            applyAppSettings();
+            case R.id.easylist:
+                // Toggle the EasyList status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASY_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
 
-            // Reload the webpage if displaying of images has been disabled in the Settings activity.
-            if (reloadOnRestart) {
-                // Reload `mainWebView`.
-                mainWebView.reload();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
 
-                // Reset `reloadOnRestartBoolean`.
-                reloadOnRestart = false;
-            }
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // Reset the return from settings flag.
-            reapplyAppSettingsOnRestart = false;
-        }
+            case R.id.easyprivacy:
+                // Toggle the EasyPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
 
-        // Apply the domain settings if returning from the Domains activity.
-        if (reapplyDomainSettingsOnRestart) {
-            // Reapply the domain settings.
-            applyDomainSettings(formattedUrlString, false, true);
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
 
-            // 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_annoyance_list:
+                // Toggle Fanboy's Annoyance List status.
+                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-            // Reset `loadUrlOnRestart.
-            loadUrlOnRestart = false;
-        }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-        // Update the bookmarks drawer if returning from the Bookmarks activity.
-        if (restartFromBookmarksActivity) {
-            // Close the bookmarks drawer.
-            drawerLayout.closeDrawer(GravityCompat.END);
+                // 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));
 
-            // Reload the bookmarks drawer.
-            loadBookmarksFolder();
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-            // Reset `restartFromBookmarksActivity`.
-            restartFromBookmarksActivity = false;
-        }
+            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));
 
-        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
-        updatePrivacyIcons(true);
-    }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
 
-    // `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.ultraprivacy:
+                // Toggle the UltraPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.ULTRA_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
 
-        // Resume `mainWebView`.
-        mainWebView.onResume();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
 
-        // 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")) {
-            // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
-            mainWebView.loadData(waitingForOrbotHTMLString, "text/html", null);
-        }
+            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));
 
-        if (displayingFullScreenVideo) {
-            // Remove the translucent overlays.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-            // 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_privacy_browser:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
 
-    @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_webview_default:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString("");
 
-        // 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_firefox_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
 
-    @Override
-    public void onDestroy() {
-        // Unregister the Orbot status broadcast receiver.
-        this.unregisterReceiver(orbotStatusBroadcastReceiver);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Run the default commands.
-        super.onDestroy();
-    }
+            case R.id.user_agent_chrome_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
 
-    @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        // Inflate the menu; this adds items to the action bar if it is present.
-        getMenuInflater().inflate(R.menu.webview_options_menu, menu);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
-        mainMenu = menu;
+            case R.id.user_agent_safari_on_ios:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
 
-        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
-        updatePrivacyIcons(false);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Get handles for the menu items.
-        MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
-        MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
-        MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
-        MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
-        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
-        MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
-        MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
+            case R.id.user_agent_firefox_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
 
-        // Only display third-party cookies if API >= 21
-        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Only display the form data menu items if the API < 26.
-        toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
-        clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
+            case R.id.user_agent_chromium_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
 
-        // Only show Ad Consent if this is the free flavor.
-        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Get the shared preference values.  `this` references the current context.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+            case R.id.user_agent_firefox_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
 
-        // 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 (sharedPreferences.getBoolean("display_additional_app_bar_icons", false)) {
-            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;
 
-        return true;
-    }
+            case R.id.user_agent_chrome_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
 
-    @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 easyListMenuItem = menu.findItem(R.id.easylist);
-        MenuItem easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
-        MenuItem fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
-        MenuItem fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
-        MenuItem ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
-        MenuItem blockAllThirdParyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
-        MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
-        MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
-        MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
+                // 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.user_agent_edge_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
 
-        // 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);
-        blockAllThirdParyRequestsMenuItem.setChecked(blockAllThirdPartyRequests);
-        swipeToRefreshMenuItem.setChecked(swipeRefreshLayout.isEnabled());
-        displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
-
-        // Enable third-party cookies if first-party cookies are enabled.
-        toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
-
-        // Enable DOM Storage if JavaScript is enabled.
-        toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Enable Clear Cookies if there are any.
-        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
+            case R.id.user_agent_internet_explorer_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
 
-        // 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;
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+                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.user_agent_safari_on_macos:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
 
-        // Enable Clear DOM Storage if there is any.
-        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
+                // Reload the current WebView.
+                currentWebView.reload();
+                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.user_agent_custom:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
 
-        // Enable Clear Data if any of the submenu items are enabled.
-        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Update the display names for the blocklists with the number of blocked requests.
-        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));
-        blockAllThirdParyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
+            case R.id.font_size_twenty_five_percent:
+                currentWebView.getSettings().setTextZoom(25);
+                return true;
 
-        // Disable Fanboy's Social Blocking List if Fanboy's Annoyance List is checked.
-        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
+            case R.id.font_size_fifty_percent:
+                currentWebView.getSettings().setTextZoom(50);
+                return true;
 
-        // Initialize font size variables.
-        int fontSize = mainWebView.getSettings().getTextZoom();
-        String fontSizeTitle;
-        MenuItem selectedFontSizeMenuItem;
+            case R.id.font_size_seventy_five_percent:
+                currentWebView.getSettings().setTextZoom(75);
+                return true;
 
-        // Prepare the font size title and current size menu item.
-        switch (fontSize) {
-            case 25:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
-                break;
+            case R.id.font_size_one_hundred_percent:
+                currentWebView.getSettings().setTextZoom(100);
+                return true;
 
-            case 50:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
-                break;
+            case R.id.font_size_one_hundred_twenty_five_percent:
+                currentWebView.getSettings().setTextZoom(125);
+                return true;
 
-            case 75:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
-                break;
+            case R.id.font_size_one_hundred_fifty_percent:
+                currentWebView.getSettings().setTextZoom(150);
+                return true;
 
-            case 100:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                break;
+            case R.id.font_size_one_hundred_seventy_five_percent:
+                currentWebView.getSettings().setTextZoom(175);
+                return true;
 
-            case 125:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
-                break;
+            case R.id.font_size_two_hundred_percent:
+                currentWebView.getSettings().setTextZoom(200);
+                return true;
 
-            case 150:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
-                break;
+            case R.id.swipe_to_refresh:
+                // Toggle the stored status of swipe to refresh.
+                currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
+
+                // Get a handle for the swipe refresh layout.
+                SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+
+                // Update the swipe refresh layout.
+                if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
+                    if (Build.VERSION.SDK_INT >= 23) {  // For API >= 23, the status of the scroll refresh listener is continuously updated by the on scroll change listener.
+                        // Only enable the swipe refresh layout if the WebView is scrolled to the top.
+                        swipeRefreshLayout.setEnabled(currentWebView.getY() == 0);
+                    } else {  // For API < 23, the swipe refresh layout is always enabled.
+                        // Enable the swipe refresh layout.
+                        swipeRefreshLayout.setEnabled(true);
+                    }
+                } else {  // Swipe to refresh is disabled.
+                    // Disable the swipe refresh layout.
+                    swipeRefreshLayout.setEnabled(false);
+                }
+                return true;
 
-            case 175:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
-                break;
+            case R.id.display_images:
+                if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
+                    // Disable loading of images.
+                    currentWebView.getSettings().setLoadsImagesAutomatically(false);
 
-            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;
+                    // 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;
 
-            default:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                break;
-        }
+            case R.id.night_mode:
+                // Toggle night mode.
+                currentWebView.setNightMode(!currentWebView.getNightMode());
+
+                // Enable or disable JavaScript according to night mode, the global preference, and any domain settings.
+                if (currentWebView.getNightMode()) {  // Night mode is enabled, which requires JavaScript.
+                    // Enable JavaScript.
+                    currentWebView.getSettings().setJavaScriptEnabled(true);
+                } else if (currentWebView.getDomainSettingsApplied()) {  // Night mode is disabled and domain settings are applied.  Set JavaScript according to the domain settings.
+                    // Apply the JavaScript preference that was stored the last time domain settings were loaded.
+                    currentWebView.getSettings().setJavaScriptEnabled(currentWebView.getDomainSettingsJavaScriptEnabled());
+                } else {  // Night mode is disabled and domain settings are not applied.  Set JavaScript according to the global preference.
+                    // Apply the JavaScript preference.
+                    currentWebView.getSettings().setJavaScriptEnabled(sharedPreferences.getBoolean("javascript", false));
+                }
 
-        // Set the font size title and select the current size menu item.
-        fontSizeMenuItem.setTitle(fontSizeTitle);
-        selectedFontSizeMenuItem.setChecked(true);
+                // Update the privacy icons.
+                updatePrivacyIcons(false);
 
-        // Run all the other default commands.
-        super.onPrepareOptionsMenu(menu);
+                // Reload the website.
+                currentWebView.reload();
+                return true;
 
-        // Display the menu.
-        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);
+                EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
 
-    @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();
+                // Hide the toolbar.
+                toolbar.setVisibility(View.GONE);
 
-        // Set the commands that relate to the menu entries.
-        switch (menuItemId) {
-            case R.id.toggle_javascript:
-                // Switch the status of javaScriptEnabled.
-                javaScriptEnabled = !javaScriptEnabled;
+                // Show the find on page linear layout.
+                findOnPageLinearLayout.setVisibility(View.VISIBLE);
 
-                // Apply the new JavaScript status.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
+                // 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();
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                    // Get a handle for the input method manager.
+                    InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-                // 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();
-                }
+                    // Remove the lint warning below that the input method manager might be null.
+                    assert inputMethodManager != null;
 
-                // Reload the WebView.
-                mainWebView.reload();
+                    // Display the keyboard.  `0` sets no input flags.
+                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
+                }, 200);
                 return true;
 
-            case R.id.add_or_edit_domain:
-                if (domainSettingsApplied) {  // Edit the current domain settings.
-                    // Reapply the domain settings on returning to `MainWebViewActivity`.
-                    reapplyDomainSettingsOnRestart = true;
-                    currentDomainName = "";
+            case R.id.view_source:
+                // Create an intent to launch the view source activity.
+                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
 
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                // Add the variables to the intent.
+                viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
+                viewSourceIntent.putExtra("current_url", currentWebView.getUrl());
 
-                    // 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);
+                // Make it so.
+                startActivity(viewSourceIntent);
+                return true;
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                } else {  // Add a new domain.
-                    // Apply the new domain settings on returning to `MainWebViewActivity`.
-                    reapplyDomainSettingsOnRestart = true;
-                    currentDomainName = "";
+            case R.id.share_url:
+                // Setup the share string.
+                String shareString = currentWebView.getTitle() + " – " + currentWebView.getUrl();
 
-                    // Get the current domain
-                    Uri currentUri = Uri.parse(formattedUrlString);
-                    String currentDomain = currentUri.getHost();
+                // Create the share intent.
+                Intent shareIntent = new Intent(Intent.ACTION_SEND);
+                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
+                shareIntent.setType("text/plain");
 
-                    // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
-                    DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
+                // Make it so.
+                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
+                return true;
 
-                    // Create the domain and store the database ID.
-                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
+            case R.id.print:
+                // Get a print manager instance.
+                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
 
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                // Remove the lint error below that print manager might be null.
+                assert printManager != null;
 
-                    // 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);
+                // Create a print document adapter from the current WebView.
+                PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                }
+                // Print the document.
+                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
                 return true;
 
-            case R.id.toggle_first_party_cookies:
-                // Switch the status of firstPartyCookiesEnabled.
-                firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
+            case R.id.open_with_app:
+                openWithApp(currentWebView.getUrl());
+                return true;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(firstPartyCookiesEnabled);
+            case R.id.open_with_browser:
+                openWithBrowser(currentWebView.getUrl());
+                return true;
 
-                // Apply the new cookie status.
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
+            case R.id.add_to_homescreen:
+                // Instantiate the create home screen shortcut dialog.
+                DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
+                        currentWebView.getFavoriteOrDefaultIcon());
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // Show the create home screen shortcut dialog.
+                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
+                return true;
 
-                // 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();
+            case R.id.proxy_through_orbot:
+                // Toggle the proxy through Orbot variable.
+                proxyThroughOrbot = !proxyThroughOrbot;
+
+                // Apply the proxy through Orbot settings.
+                applyProxyThroughOrbot(true);
+                return true;
+
+            case R.id.refresh:
+                if (menuItem.getTitle().equals(getString(R.string.refresh))) {  // The refresh button was pushed.
+                    // Reload the current WebView.
+                    currentWebView.reload();
+                } else {  // The stop button was pushed.
+                    // Stop the loading of the WebView.
+                    currentWebView.stopLoading();
                 }
+                return true;
 
-                // Reload the WebView.
-                mainWebView.reload();
+            case R.id.ad_consent:
+                // Display the ad consent dialog.
+                DialogFragment adConsentDialogFragment = new AdConsentDialog();
+                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
                 return true;
 
-            case R.id.toggle_third_party_cookies:
-                if (Build.VERSION.SDK_INT >= 21) {
-                    // Switch the status of thirdPartyCookiesEnabled.
-                    thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
+            default:
+                // Don't consume the event.
+                return super.onOptionsItemSelected(menuItem);
+        }
+    }
 
-                    // Update the menu checkbox.
-                    menuItem.setChecked(thirdPartyCookiesEnabled);
+    // removeAllCookies is deprecated, but it is required for API < 21.
+    @Override
+    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
+        // Get the menu item ID.
+        int menuItemId = menuItem.getItemId();
+
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+        // Run the commands that correspond to the selected menu item.
+        switch (menuItemId) {
+            case R.id.close_tab:
+                // Get a handle for the tab layout and the view pager.
+                TabLayout tabLayout = findViewById(R.id.tablayout);
+                ViewPager webViewPager = findViewById(R.id.webviewpager);
+
+                // Get the current tab number.
+                int currentTabNumber = tabLayout.getSelectedTabPosition();
+
+                // Delete the current tab.
+                tabLayout.removeTabAt(currentTabNumber);
+
+                // Delete the current page.  If the selected page number did not change during the delete, it will return true, meaning that the current WebView must be reset.
+                if (webViewPagerAdapter.deletePage(currentTabNumber, webViewPager)) {
+                    setCurrentWebView(currentTabNumber);
+                }
+                break;
+
+            case R.id.clear_and_exit:
+                // Close the bookmarks cursor and database.
+                bookmarksCursor.close();
+                bookmarksDatabaseHelper.close();
+
+                // Get the status of the clear everything preference.
+                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+
+                // Get a handle for the runtime.
+                Runtime runtime = Runtime.getRuntime();
 
-                    // Apply the new cookie status.
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
+                // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
+                // which links to `/data/data/com.stoutner.privacybrowser.standard`.
+                String privateDataDirectoryString = getApplicationInfo().dataDir;
 
-                    // Display a `Snackbar`.
-                    if (thirdPartyCookiesEnabled) {
-                        Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
+                // Clear cookies.
+                if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
+                    // The command to remove cookies changed slightly in API 21.
+                    if (Build.VERSION.SDK_INT >= 21) {
+                        CookieManager.getInstance().removeAllCookies(null);
                     } else {
-                        Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
+                        CookieManager.getInstance().removeAllCookie();
                     }
 
-                    // Reload the WebView.
-                    mainWebView.reload();
-                } // Else do nothing because SDK < 21.
-                return true;
+                    // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+                    try {
+                        // Two commands must be used because `Runtime.exec()` does not like `*`.
+                        Process deleteCookiesProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
+                        Process deleteCookiesJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
+
+                        // Wait until the processes have finished.
+                        deleteCookiesProcess.waitFor();
+                        deleteCookiesJournalProcess.waitFor();
+                    } catch (Exception exception) {
+                        // Do nothing if an error is thrown.
+                    }
+                }
 
-            case R.id.toggle_dom_storage:
-                // Switch the status of domStorageEnabled.
-                domStorageEnabled = !domStorageEnabled;
+                // Clear DOM storage.
+                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
+                    // Ask `WebStorage` to clear the DOM storage.
+                    WebStorage webStorage = WebStorage.getInstance();
+                    webStorage.deleteAllData();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(domStorageEnabled);
+                    // Manually delete the DOM storage files and directories, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+                    try {
+                        // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                        Process deleteLocalStorageProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
 
-                // Apply the new DOM Storage status.
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
+                        // Multiple commands must be used because `Runtime.exec()` does not like `*`.
+                        Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
+                        Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
+                        Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
+                        Process deleteDatabaseProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
+
+                        // Wait until the processes have finished.
+                        deleteLocalStorageProcess.waitFor();
+                        deleteIndexProcess.waitFor();
+                        deleteQuotaManagerProcess.waitFor();
+                        deleteQuotaManagerJournalProcess.waitFor();
+                        deleteDatabaseProcess.waitFor();
+                    } catch (Exception exception) {
+                        // Do nothing if an error is thrown.
+                    }
+                }
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // Clear form data if the API < 26.
+                if ((Build.VERSION.SDK_INT < 26) && (clearEverything || sharedPreferences.getBoolean("clear_form_data", true))) {
+                    WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
+                    webViewDatabase.clearFormData();
 
-                // Display a `Snackbar`.
-                if (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();
+                    // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+                    try {
+                        // A string array must be used because the database contains a space and `Runtime.exec` will not otherwise escape the string correctly.
+                        Process deleteWebDataProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
+                        Process deleteWebDataJournalProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data-journal"});
+
+                        // Wait until the processes have finished.
+                        deleteWebDataProcess.waitFor();
+                        deleteWebDataJournalProcess.waitFor();
+                    } catch (Exception exception) {
+                        // Do nothing if an error is thrown.
+                    }
                 }
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                // Clear the cache.
+                if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
+                    // Clear the cache from each WebView.
+                    for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                        // Get the WebView tab fragment.
+                        WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            // Form data can be removed once the minimum API >= 26.
-            case R.id.toggle_save_form_data:
-                // Switch the status of saveFormDataEnabled.
-                saveFormDataEnabled = !saveFormDataEnabled;
+                        // Get the fragment view.
+                        View fragmentView = webViewTabFragment.getView();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(saveFormDataEnabled);
+                        // Only clear the cache if the WebView exists.
+                        if (fragmentView != null) {
+                            // Get the nested scroll WebView from the tab fragment.
+                            NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+
+                            // Clear the cache for this WebView.
+                            nestedScrollWebView.clearCache(true);
+                        }
+                    }
+
+                    // Manually delete the cache directories.
+                    try {
+                        // Delete the main cache directory.
+                        Process deleteCacheProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/cache");
 
-                // Apply the new form data status.
-                mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
+                        // Delete the secondary `Service Worker` cache directory.
+                        // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                        Process deleteServiceWorkerProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
 
-                // Display a `Snackbar`.
-                if (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();
+                        // Wait until the processes have finished.
+                        deleteCacheProcess.waitFor();
+                        deleteServiceWorkerProcess.waitFor();
+                    } catch (Exception exception) {
+                        // Do nothing if an error is thrown.
+                    }
                 }
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // Wipe out each WebView.
+                for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                    // Get the WebView tab fragment.
+                    WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                // Reload the WebView.
-                mainWebView.reload();
-                return true;
+                    // Get the fragment view.
+                    View fragmentView = webViewTabFragment.getView();
 
-            case R.id.clear_cookies:
-                Snackbar.make(findViewById(R.id.main_webview), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
-                        .setAction(R.string.undo, v -> {
-                            // Do nothing because everything will be handled by `onDismissed()` below.
-                        })
-                        .addCallback(new Snackbar.Callback() {
-                            @Override
-                            public void onDismissed(Snackbar snackbar, int event) {
-                                switch (event) {
-                                    // The user pushed the `Undo` button.
-                                    case Snackbar.Callback.DISMISS_EVENT_ACTION:
-                                        // Do nothing.
-                                        break;
-
-                                    // The `Snackbar` was dismissed without the `Undo` button being pushed.
-                                    default:
-                                        // `cookieManager.removeAllCookie()` varies by SDK.
-                                        if (Build.VERSION.SDK_INT < 21) {
-                                            cookieManager.removeAllCookie();
-                                        } else {
-                                            // `null` indicates no callback.
-                                            cookieManager.removeAllCookies(null);
-                                        }
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+                    // Only 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);
 
-            case R.id.clear_dom_storage:
-                Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
-                        .setAction(R.string.undo, v -> {
-                            // Do nothing because everything will be handled by `onDismissed()` below.
-                        })
-                        .addCallback(new Snackbar.Callback() {
-                            @Override
-                            public void onDismissed(Snackbar snackbar, int event) {
-                                switch (event) {
-                                    // The user pushed the `Undo` button.
-                                    case Snackbar.Callback.DISMISS_EVENT_ACTION:
-                                        // Do nothing.
-                                        break;
-
-                                    // The `Snackbar` was dismissed without the `Undo` button being pushed.
-                                    default:
-                                        // Delete the DOM Storage.
-                                        WebStorage webStorage = WebStorage.getInstance();
-                                        webStorage.deleteAllData();
-
-                                        // Manually delete the DOM storage files and directories.
-                                        try {
-                                            // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
-                                            privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
-
-                                            // Multiple commands must be used because `Runtime.exec()` does not like `*`.
-                                            privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
-                                            privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
-                                            privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
-                                            privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
-                                        } catch (IOException e) {
-                                            // Do nothing if an error is thrown.
-                                        }
-                                }
-                            }
-                        })
-                        .show();
-                return true;
-
-            // Form data can be remove once the minimum API >= 26.
-            case R.id.clear_form_data:
-                Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
-                        .setAction(R.string.undo, v -> {
-                            // Do nothing because everything will be handled by `onDismissed()` below.
-                        })
-                        .addCallback(new Snackbar.Callback() {
-                            @Override
-                            public void onDismissed(Snackbar snackbar, int event) {
-                                switch (event) {
-                                    // The user pushed the `Undo` button.
-                                    case Snackbar.Callback.DISMISS_EVENT_ACTION:
-                                        // Do nothing.
-                                        break;
-
-                                    // The `Snackbar` was dismissed without the `Undo` button being pushed.
-                                    default:
-                                        // Delete the form data.
-                                        WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
-                                        mainWebViewDatabase.clearFormData();
-                                }
-                            }
-                        })
-                        .show();
-                return true;
-
-            case R.id.font_size_twenty_five_percent:
-                mainWebView.getSettings().setTextZoom(25);
-                return true;
-
-            case R.id.font_size_fifty_percent:
-                mainWebView.getSettings().setTextZoom(50);
-                return true;
-
-            case R.id.font_size_seventy_five_percent:
-                mainWebView.getSettings().setTextZoom(75);
-                return true;
-
-            case R.id.font_size_one_hundred_percent:
-                mainWebView.getSettings().setTextZoom(100);
-                return true;
-
-            case R.id.font_size_one_hundred_twenty_five_percent:
-                mainWebView.getSettings().setTextZoom(125);
-                return true;
-
-            case R.id.font_size_one_hundred_fifty_percent:
-                mainWebView.getSettings().setTextZoom(150);
-                return true;
-
-            case R.id.font_size_one_hundred_seventy_five_percent:
-                mainWebView.getSettings().setTextZoom(175);
-                return true;
-
-            case R.id.font_size_two_hundred_percent:
-                mainWebView.getSettings().setTextZoom(200);
-                return true;
+                        // Clear SSL certificate preferences for this WebView.
+                        nestedScrollWebView.clearSslPreferences();
 
-            case R.id.swipe_to_refresh:
-                // Toggle swipe to refresh.
-                swipeRefreshLayout.setEnabled(!swipeRefreshLayout.isEnabled());
-                return true;
+                        // Clear the back/forward history for this WebView.
+                        nestedScrollWebView.clearHistory();
 
-            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);
+                        // Destroy the internal state of `mainWebView`.
+                        nestedScrollWebView.destroy();
+                    }
                 }
 
-                // Set `onTheFlyDisplayImagesSet`.
-                onTheFlyDisplayImagesSet = true;
-                return true;
-
-            case R.id.view_source:
-                // Launch the View Source activity.
-                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
-                startActivity(viewSourceIntent);
-                return true;
-
-            case R.id.easylist:
-                // Toggle the EasyList status.
-                easyListEnabled = !easyListEnabled;
-
-                // Update the menu checkbox.
-                menuItem.setChecked(easyListEnabled);
-
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
-
-            case R.id.easyprivacy:
-                // Toggle the EasyPrivacy status.
-                easyPrivacyEnabled = !easyPrivacyEnabled;
-
-                // Update the menu checkbox.
-                menuItem.setChecked(easyPrivacyEnabled);
-
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
-
-            case R.id.fanboys_annoyance_list:
-                // Toggle Fanboy's Annoyance List status.
-                fanboysAnnoyanceListEnabled = !fanboysAnnoyanceListEnabled;
-
-                // Update the menu checkbox.
-                menuItem.setChecked(fanboysAnnoyanceListEnabled);
-
-                // Update the staus of Fanboy's Social Blocking List.
-                MenuItem fanboysSocialBlockingListMenuItem = mainMenu.findItem(R.id.fanboys_social_blocking_list);
-                fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
-
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
-
-            case R.id.fanboys_social_blocking_list:
-                // Toggle Fanboy's Social Blocking List status.
-                fanboysSocialBlockingListEnabled = !fanboysSocialBlockingListEnabled;
-
-                // Update the menu checkbox.
-                menuItem.setChecked(fanboysSocialBlockingListEnabled);
-
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
-
-            case R.id.ultraprivacy:
-                // Toggle the UltraPrivacy status.
-                ultraPrivacyEnabled = !ultraPrivacyEnabled;
-
-                // Update the menu checkbox.
-                menuItem.setChecked(ultraPrivacyEnabled);
-
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
-
-            case R.id.block_all_third_party_requests:
-                //Toggle the third-party requests blocker status.
-                blockAllThirdPartyRequests = !blockAllThirdPartyRequests;
-
-                // Update the menu checkbox.
-                menuItem.setChecked(blockAllThirdPartyRequests);
-
-                // Reload the main WebView.
-                mainWebView.reload();
-                return true;
-
-            case R.id.share:
-                // Setup the share string.
-                String shareString = webViewTitle + " – " + urlTextBox.getText().toString();
-
-                // Create the share intent.
-                Intent shareIntent = new Intent();
-                shareIntent.setAction(Intent.ACTION_SEND);
-                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
-                shareIntent.setType("text/plain");
-
-                // Make it so.
-                startActivity(Intent.createChooser(shareIntent, "Share URL"));
-                return true;
-
-            case R.id.find_on_page:
-                // Hide the URL app bar.
-                supportAppBar.setVisibility(View.GONE);
-
-                // Show the Find on Page `RelativeLayout`.
-                findOnPageLinearLayout.setVisibility(View.VISIBLE);
-
-                // Display the keyboard.  We have to wait 200 ms before running the command to work around a bug in Android.
-                // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
-                findOnPageEditText.postDelayed(() -> {
-                    // Set the focus on `findOnPageEditText`.
-                    findOnPageEditText.requestFocus();
-
-                    // Display the keyboard.  `0` sets no input flags.
-                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
-                }, 200);
-                return true;
-
-            case R.id.print:
-                // Get a `PrintManager` instance.
-                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
-
-                // Convert `mainWebView` to `printDocumentAdapter`.
-                PrintDocumentAdapter printDocumentAdapter = mainWebView.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.add_to_homescreen:
-                // Show the `CreateHomeScreenShortcutDialog` `AlertDialog` and name this instance `R.string.create_shortcut`.
-                AppCompatDialogFragment createHomeScreenShortcutDialogFragment = new CreateHomeScreenShortcutDialog();
-                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
-
-                //Everything else will be handled by `CreateHomeScreenShortcutDialog` and the associated listener below.
-                return true;
+                // Clear the custom headers.
+                customHeaders.clear();
 
-            case R.id.refresh:
-                mainWebView.reload();
-                return true;
+                // Manually delete the `app_webview` folder, which contains the cookies, DOM storage, form data, and `Service Worker` cache.
+                // See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
+                if (clearEverything) {
+                    try {
+                        // Delete the folder.
+                        Process deleteAppWebviewProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
 
-            case R.id.ad_consent:
-                // Display the ad consent dialog.
-                DialogFragment adConsentDialogFragment = new AdConsentDialog();
-                adConsentDialogFragment.show(getFragmentManager(), getString(R.string.ad_consent));
-                return true;
+                        // Wait until the process has finished.
+                        deleteAppWebviewProcess.waitFor();
+                    } catch (Exception exception) {
+                        // Do nothing if an error is thrown.
+                    }
+                }
 
-            default:
-                // Don't consume the event.
-                return super.onOptionsItemSelected(menuItem);
-        }
-    }
+                // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    finishAndRemoveTask();
+                } else {
+                    finish();
+                }
 
-    // removeAllCookies is deprecated, but it is required for API < 21.
-    @SuppressWarnings("deprecation")
-    @Override
-    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
-        int menuItemId = menuItem.getItemId();
+                // Remove the terminated program from RAM.  The status code is `0`.
+                System.exit(0);
+                break;
 
-        switch (menuItemId) {
             case R.id.home:
-                loadUrl(homepage);
+                // Select the homepage based on the proxy through Orbot status.
+                if (proxyThroughOrbot) {
+                    // Load the Tor homepage.
+                    loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
+                } else {
+                    // Load the normal homepage.
+                    loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
+                }
                 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 = "";
+                if (currentWebView.canGoBack()) {
+                    // Reset the current domain name so that navigation works if third-party requests are blocked.
+                    currentWebView.resetCurrentDomainName();
 
-                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-                    navigatingHistory = true;
+                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
+                    currentWebView.setNavigatingHistory(true);
 
                     // Load the previous website in the history.
-                    mainWebView.goBack();
+                    currentWebView.goBack();
                 }
                 break;
 
             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 = "";
+                if (currentWebView.canGoForward()) {
+                    // Reset the current domain name so that navigation works if third-party requests are blocked.
+                    currentWebView.resetCurrentDomainName();
 
-                    // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-                    navigatingHistory = true;
+                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
+                    currentWebView.setNavigatingHistory(true);
 
                     // Load the next website in the history.
-                    mainWebView.goForward();
+                    currentWebView.goForward();
                 }
                 break;
 
             case R.id.history:
                 // Get the `WebBackForwardList`.
-                WebBackForwardList webBackForwardList = mainWebView.copyBackForwardList();
+                WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-                // Show the `UrlHistoryDialog` `AlertDialog` and name this instance `R.string.history`.  `this` is the `Context`.
-                AppCompatDialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(this, webBackForwardList);
+                // 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 R.id.requests:
-                // Launch the requests activity.
+                // 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;
 
@@ -2580,10 +2266,19 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             case R.id.domains:
                 // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
                 reapplyDomainSettingsOnRestart = true;
-                currentDomainName = "";
+
+                // 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);
+
+                // Add the extra information to the intent.
+                domainsIntent.putExtra("current_url", currentWebView.getUrl());
+
+                // Make it so.
                 startActivity(domainsIntent);
                 break;
 
@@ -2593,13 +2288,24 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Set the flag to reapply the domain settings on restart when returning from Settings.
                 reapplyDomainSettingsOnRestart = true;
-                currentDomainName = "";
 
                 // 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);
@@ -2607,173 +2313,84 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 break;
 
             case R.id.about:
-                // Launch `AboutActivity`.
+                // Create an intent to launch the about activity.
                 Intent aboutIntent = new Intent(this, AboutActivity.class);
+
+                // Create a string array for the blocklist versions.
+                String[] blocklistVersions = new String[] {easyList.get(0).get(0)[0], easyPrivacy.get(0).get(0)[0], fanboysAnnoyanceList.get(0).get(0)[0], fanboysSocialList.get(0).get(0)[0],
+                        ultraPrivacy.get(0).get(0)[0]};
+
+                // Add the blocklist versions to the intent.
+                aboutIntent.putExtra("blocklist_versions", blocklistVersions);
+
+                // Make it so.
                 startActivity(aboutIntent);
                 break;
+        }
 
-            case R.id.clearAndExit:
-                // Get a handle for `sharedPreferences`.  `this` references the current context.
-                SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        // Get a handle for the drawer layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+        // Close the navigation drawer.
+        drawerLayout.closeDrawer(GravityCompat.START);
+        return 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();
-                    }
+    @Override
+    public void onPostCreate(Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onPostCreate(savedInstanceState);
 
-                    // 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.
-                    }
-                }
+        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
+        actionBarDrawerToggle.syncState();
+    }
 
-                // Clear DOM storage.
-                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
-                    // Ask `WebStorage` to clear the DOM storage.
-                    WebStorage webStorage = WebStorage.getInstance();
-                    webStorage.deleteAllData();
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        // Run the default commands.
+        super.onConfigurationChanged(newConfig);
 
-                    // 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 the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-                        // 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.
-                    }
-                }
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
 
-                // 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();
+        // Recalculate the drawer header padding.
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
 
-                    // 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.
-                    }
-                }
+        // 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));
+        }
 
-                // Clear the cache.
-                if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
-                    // `true` includes disk files.
-                    mainWebView.clearCache(true);
+        // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
+        // https://code.google.com/p/android/issues/detail?id=20493#c8
+        // ActivityCompat.invalidateOptionsMenu(this);
+    }
 
-                    // Manually delete the cache directories.
-                    try {
-                        // Delete the main cache directory.
-                        privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
+        // Store the hit test result.
+        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
 
-                        // 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.
-                    }
-                }
-
-                // Clear SSL certificate preferences.
-                mainWebView.clearSslPreferences();
-
-                // Clear the back/forward history.
-                mainWebView.clearHistory();
-
-                // Clear `formattedUrlString`.
-                formattedUrlString = null;
-
-                // Clear `customHeaders`.
-                customHeaders.clear();
-
-                // Detach all views from `mainWebViewRelativeLayout`.
-                mainWebViewRelativeLayout.removeAllViews();
-
-                // Destroy the internal state of `mainWebView`.
-                mainWebView.destroy();
-
-                // 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.
-                    }
-                }
-
-                // 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;
-        }
-
-        // 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();
-    }
-
-    @Override
-    public void onConfigurationChanged(Configuration newConfig) {
-        super.onConfigurationChanged(newConfig);
-
-        // 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_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 = mainWebView.getHitTestResult();
-
-        // Create strings.
+        // Create the URL strings.
         final String imageUrl;
         final String linkUrl;
 
-        // Get a handle for the `ClipboardManager`.
+        // Get handles for the system managers.
         final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+        FragmentManager fragmentManager = getSupportFragmentManager();
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // Remove the lint errors below that `clipboardManager` might be `null`.
+        // Remove the lint errors below that the clipboard manager might be null.
         assert clipboardManager != null;
 
+        // Process the link according to the type.
         switch (hitTestResult.getType()) {
             // `SRC_ANCHOR_TYPE` is a link.
             case WebView.HitTestResult.SRC_ANCHOR_TYPE:
@@ -2784,11 +2401,27 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 menu.setHeaderTitle(linkUrl);
 
                 // Add a Load URL entry.
-                menu.add(R.string.load_url).setOnMenuItemClickListener((MenuItem item) -> {
+                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Add a new tab.
+                    addTab(null);
+
+                    // Load the URL.
                     loadUrl(linkUrl);
                     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 Copy URL entry.
                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
                     // Save the link URL in a `ClipData`.
@@ -2801,37 +2434,40 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Add a Download URL entry.
                 menu.add(R.string.download_url).setOnMenuItemClickListener((MenuItem item) -> {
-                    // 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 WRITE_EXTERNAL_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.
-                            // Get a handle for 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(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 WRITE_EXTERNAL_STORAGE permission has already been granted.
-                        // Get a handle for the download file alert dialog.
-                        AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(linkUrl, "none", -1);
+                    // Check if the download should be processed by an external app.
+                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
+                        openUrlWithExternalApp(linkUrl);
+                    } else {  // Download with Android's download manager.
+                        // Check to see if the storage permission has already been granted.
+                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
+                            // Store the variables for future use by `onRequestPermissionsResult()`.
+                            downloadUrl = linkUrl;
+                            downloadContentDisposition = "none";
+                            downloadContentLength = -1;
+
+                            // 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(getSupportFragmentManager(), getString(R.string.download));
+                            // Show the download file alert dialog.
+                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
                     }
                     return false;
                 });
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                // Add a Cancel entry, which by default closes the context menu.
                 menu.add(R.string.cancel);
                 break;
 
@@ -2842,9 +2478,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Set the target URL as the title of the `ContextMenu`.
                 menu.setHeaderTitle(linkUrl);
 
-                // Add a `Write Email` entry.
+                // Add a Write Email entry.
                 menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
-                    // We use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
+                    // 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`.
@@ -2858,7 +2494,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     return false;
                 });
 
-                // Add a `Copy Email Address` entry.
+                // 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);
@@ -2880,43 +2516,46 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Set the image URL as the title of the `ContextMenu`.
                 menu.setHeaderTitle(imageUrl);
 
-                // Add a `View Image` entry.
+                // Add a View Image entry.
                 menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
                     loadUrl(imageUrl);
                     return false;
                 });
 
-                // Add a `Download Image` entry.
+                // Add a Download Image entry.
                 menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
-                    // 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 WRITE_EXTERNAL_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.
-                            // Get a handle for 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(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 WRITE_EXTERNAL_STORAGE permission has already been granted.
-                        // Get a handle for the download image alert dialog.
-                        AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
+                    // Check if the download should be processed by an external app.
+                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
+                        openUrlWithExternalApp(imageUrl);
+                    } else {  // Download with Android's download manager.
+                        // Check to see if the storage permission has already been granted.
+                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
+                            // Store the image URL for use by `onRequestPermissionResult()`.
+                            downloadImageUrl = imageUrl;
+
+                            // 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);
 
-                        // Show the download image alert dialog.
-                        downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
                     }
                     return false;
                 });
 
-                // Add a `Copy URL` entry.
+                // 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);
@@ -2926,6 +2565,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     return false;
                 });
 
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(imageUrl);
+                    return false;
+                });
+
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(imageUrl);
+                    return false;
+                });
+
                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
                 menu.add(R.string.cancel);
                 break;
@@ -2947,30 +2598,33 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Add a `Download Image` entry.
                 menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
-                    // 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 WRITE_EXTERNAL_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.
-                            // Get a handle for 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(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 WRITE_EXTERNAL_STORAGE permission has already been granted.
-                        // Get a handle for the download image alert dialog.
-                        AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
+                    // Check if the download should be processed by an external app.
+                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
+                        openUrlWithExternalApp(imageUrl);
+                    } else {  // Download with Android's download manager.
+                        // Check to see if the storage permission has already been granted.
+                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
+                            // Store the image URL for use by `onRequestPermissionResult()`.
+                            downloadImageUrl = imageUrl;
+
+                            // 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);
 
-                        // Show the download image alert dialog.
-                        downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
                     }
                     return false;
                 });
@@ -2985,6 +2639,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     return false;
                 });
 
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(imageUrl);
+                    return false;
+                });
+
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(imageUrl);
+                    return false;
+                });
+
                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
                 menu.add(R.string.cancel);
                 break;
@@ -2992,18 +2658,25 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     }
 
     @Override
-    public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
-        // Get the `EditTexts` from the `dialogFragment`.
+    public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+
+        // Get the 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);
 
-        // Extract the strings from the `EditTexts`.
+        // Extract the strings from the edit texts.
         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 
-        // Convert the favoriteIcon Bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+        // Create a favorite icon byte array output stream.
         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+
+        // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
         favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
+
+        // Convert the favorite icon byte array stream to a byte array.
         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
         // Display the new bookmark below the current items in the (0 indexed) list.
@@ -3012,10 +2685,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Create the bookmark.
         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-        // Update the `ListView`.
+        // Update the list view.
         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
         // Scroll to the new bookmark.
@@ -3023,8 +2696,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     }
 
     @Override
-    public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
-        // Get handles for the views in `dialogFragment`.
+    public void onCreateBookmarkFolder(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+
+        // 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);
@@ -3032,20 +2708,31 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Get new folder name string.
         String folderNameString = createFolderNameEditText.getText().toString();
 
-        // Get the new folder icon `Bitmap`.
+        // Create a folder icon bitmap.
         Bitmap folderIconBitmap;
+
+        // Set the folder icon bitmap according to the dialog.
         if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
-            // Get the default folder icon and convert it to a `Bitmap`.
+            // Get the default folder icon drawable.
             Drawable folderIconDrawable = folderIconImageView.getDrawable();
+
+            // Convert the folder icon drawable to a bitmap drawable.
             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+
+            // Convert the folder icon bitmap drawable to a bitmap.
             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
-        } else {  // Use the `WebView` favorite icon.
+        } else {  // Use the WebView favorite icon.
+            // Copy the favorite icon bitmap to the folder icon bitmap.
             folderIconBitmap = favoriteIconBitmap;
         }
 
-        // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
+        // Create a folder icon byte array output stream.
         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
+
+        // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
+
+        // Convert the folder icon byte array stream to a byte array.
         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 
         // Move all the bookmarks down one in the display order.
@@ -3057,8 +2744,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Create the folder, which will be placed at the top of the `ListView`.
         bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
 
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
         // Update the `ListView`.
         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
@@ -3068,29 +2755,120 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     }
 
     @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();
+    public void onSaveBookmark(DialogFragment dialogFragment, int selectedBookmarkDatabaseId, Bitmap favoriteIconBitmap) {
+        // Get handles for the views from `dialogFragment`.
+        EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
+        EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
+        RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
+
+        // Store the bookmark strings.
+        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
+
+        // Update the bookmark.
+        if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
+            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
+        } else {  // Update the bookmark using the `WebView` favorite icon.
+            // Create a favorite icon byte array output stream.
+            ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+
+            // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
+
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
+
+            //  Update the bookmark and the favorite icon.
+            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+        }
+
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
+
+    @Override
+    public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, Bitmap favoriteIconBitmap) {
+        // Get handles for the views from `dialogFragment`.
+        EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
+        RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
+        RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
+        ImageView defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
+
+        // Get the new folder name.
+        String newFolderNameString = editFolderNameEditText.getText().toString();
+
+        // Check if the favorite icon has changed.
+        if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
+            // Update the name in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
+        } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
+            // Create the new folder icon Bitmap.
+            Bitmap folderIconBitmap;
+
+            // Populate the new folder icon bitmap.
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable.
+                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
+
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+
+                // Convert the folder icon bitmap drawable to a bitmap.
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {  // Use the `WebView` favorite icon.
+                // Copy the favorite icon bitmap to the folder icon bitmap.
+                folderIconBitmap = favoriteIconBitmap;
+            }
+
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
+
+            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
 
-        // Convert the favorite icon bitmap to an `Icon`.  `IconCompat` is required until API >= 26.
-        IconCompat favoriteIcon = IconCompat.createWithBitmap(favoriteIconBitmap);
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-        // Setup the shortcut intent.
-        Intent shortcutIntent = new Intent();
-        shortcutIntent.setAction(Intent.ACTION_VIEW);
-        shortcutIntent.setData(Uri.parse(formattedUrlString));
+            // 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();
+
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+
+                // Convert the folder icon bitmap drawable to a bitmap.
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {  // Use the `WebView` favorite icon.
+                // Copy the favorite icon bitmap to the folder icon bitmap.
+                folderIconBitmap = favoriteIconBitmap;
+            }
 
-        // Create a shortcut info builder.  The shortcut name becomes the shortcut ID.
-        ShortcutInfoCompat.Builder shortcutInfoBuilder = new ShortcutInfoCompat.Builder(this, shortcutNameString);
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
+
+            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
+
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+
+            // Update the folder name and icon in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
+        }
 
-        // Add the required fields to the shortcut info builder.
-        shortcutInfoBuilder.setIcon(favoriteIcon);
-        shortcutInfoBuilder.setIntent(shortcutIntent);
-        shortcutInfoBuilder.setShortLabel(shortcutNameString);
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-        // Request the pin.  `ShortcutManagerCompat` can be switched to `ShortcutManager` once API >= 26.
-        ShortcutManagerCompat.requestPinShortcut(this, shortcutInfoBuilder.build(), null);
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
     }
 
     @Override
@@ -3109,17 +2887,20 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     }
 
     @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        // Get a handle for the fragment manager.
+        FragmentManager fragmentManager = getSupportFragmentManager();
+
         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);
+                DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(downloadUrl, downloadContentDisposition, downloadContentLength);
 
                 // 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);
+                    new Handler().postDelayed(() -> downloadFileDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
                 } else {
-                    downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
+                    downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
                 }
 
                 // Reset the download variables.
@@ -3130,13 +2911,13 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             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);
+                DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(downloadImageUrl);
 
                 // On API 23, displaying the fragment must be delayed or the app will crash.
                 if (Build.VERSION.SDK_INT == 23) {
-                    new Handler().postDelayed(() -> downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download)), 500);
+                    new Handler().postDelayed(() -> downloadImageDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
                 } else {
-                    downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
+                    downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
                 }
 
                 // Reset the image URL variable.
@@ -3146,7 +2927,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     }
 
     @Override
-    public void onDownloadImage(AppCompatDialogFragment dialogFragment, String imageUrl) {
+    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`.
@@ -3155,9 +2936,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Parse `imageUrl`.
             DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
 
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
+
             // Pass cookies to download manager if cookies are enabled.  This is required to download images from websites that require a login.
             // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
-            if (firstPartyCookiesEnabled) {
+            if (cookieManager.acceptCookie()) {
                 // Get the cookies for `imageUrl`.
                 String cookies = cookieManager.getCookie(imageUrl);
 
@@ -3193,12 +2977,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // 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();
+            Snackbar.make(currentWebView, R.string.cannot_download_image, Snackbar.LENGTH_INDEFINITE).show();
         }
     }
 
     @Override
-    public void onDownloadFile(AppCompatDialogFragment dialogFragment, String downloadUrl) {
+    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`.
@@ -3207,9 +2991,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Parse `downloadUrl`.
             DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
 
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
+
             // Pass cookies to download manager if cookies are enabled.  This is required to download files from websites that require a login.
             // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
-            if (firstPartyCookiesEnabled) {
+            if (cookieManager.acceptCookie()) {
                 // Get the cookies for `downloadUrl`.
                 String cookies = cookieManager.getCookie(downloadUrl);
 
@@ -3245,179 +3032,57 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // 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();
-        }
-    }
-
-    @Override
-    public void onSaveBookmark(AppCompatDialogFragment dialogFragment, int selectedBookmarkDatabaseId) {
-        // Get handles for the views from `dialogFragment`.
-        EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
-        EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
-        RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
-
-        // Store the bookmark strings.
-        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
-
-        // Update the bookmark.
-        if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
-        } else {  // Update the bookmark using the `WebView` favorite icon.
-            // Convert the favorite icon to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
-            favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
-            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
-
-            //  Update the bookmark and the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+            Snackbar.make(currentWebView, R.string.cannot_download_file, Snackbar.LENGTH_INDEFINITE).show();
         }
-
-        // Update `bookmarksCursor` with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
-
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
     }
 
     @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);
-
-        // Get the new folder name.
-        String newFolderNameString = editFolderNameEditText.getText().toString();
-
-        // Check if the favorite icon has changed.
-        if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
-            // Update the name in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
-        } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
-            // 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 folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
-            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
-            byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
-
-            // Update the folder icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, folderIconByteArray);
-        } else {  // The folder icon and the name have changed.
-            // Get the new folder icon `Bitmap`.
-            Bitmap folderIconBitmap;
-            if (defaultFolderIconRadioButton.isChecked()) {
-                // Get the default folder icon and convert it to a `Bitmap`.
-                Drawable folderIconDrawable = folderIconImageView.getDrawable();
-                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
-                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
-            } else {  // Use the `WebView` favorite icon.
-                folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
-            }
+    public void onPinnedMismatchBack() {  // TODO.  Move this logic to the dialog.
+        if (currentWebView.canGoBack()) {  // There is a back page in the history.
+            // Reset the current domain name so that navigation works if third-party requests are blocked.
+            currentWebView.resetCurrentDomainName();
 
-            // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
-            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
-            byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+            // Set navigating history so that the domain settings are applied when the new URL is loaded.
+            currentWebView.setNavigatingHistory(true);
 
-            // Update the folder name and icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
+            // Go back.
+            currentWebView.goBack();
+        } else {  // There are no pages to go back to.
+            // Load a blank page
+            loadUrl("");
         }
-
-        // 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();
+    public void onPinnedMismatchProceed() {  // TODO.  Move this logic to the dialog.
+        // Do not check the pinned information for this domain again until the domain changes.
+        currentWebView.setIgnorePinnedDomainInformation(true);
     }
 
     @Override
-    public void 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);
+    public void onUrlHistoryEntrySelected(int moveBackOrForwardSteps) {  // TODO.  Move this logic to the dialog.
+        // Reset the current domain name so that navigation works if third-party requests are blocked.
+        currentWebView.resetCurrentDomainName();
 
-        // Proceed with the HTTP authentication.
-        httpAuthHandler.proceed(usernameEditText.getText().toString(), passwordEditText.getText().toString());
-    }
+        // Set navigating history so that the domain settings are applied when the new URL is loaded.
+        currentWebView.setNavigatingHistory(true);
 
-    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));
+        // Load the history entry.
+        currentWebView.goBackOrForward(moveBackOrForwardSteps);
     }
 
     @Override
-    public void onSslErrorCancel() {
-        sslErrorHandler.cancel();
+    public void onClearHistory() {  // TODO.  Move this logic to the dialog.
+        // Clear the history.
+        currentWebView.clearHistory();
     }
 
+    // Override `onBackPressed` to handle the navigation drawer and and the WebView.
     @Override
-    public void onSslErrorProceed() {
-        sslErrorHandler.proceed();
-    }
+    public void onBackPressed() {
+        // Get a handle for the drawer layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-    @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 = "";
-
-            // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-            navigatingHistory = true;
-
-            // Go back.
-            mainWebView.goBack();
-        } else {  // There are no pages to go back to.
-            // Load a blank page
-            loadUrl("");
-        }
-    }
-
-    @Override
-    public void onSslMismatchProceed() {
-        // Do not check the pinned SSL certificate for this domain again until the domain changes.
-        ignorePinnedSslCertificate = true;
-    }
-
-    @Override
-    public void onUrlHistoryEntrySelected(int moveBackOrForwardSteps) {
-        // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
-        formattedUrlString = "";
-
-        // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-        navigatingHistory = true;
-
-        // Load the history entry.
-        mainWebView.goBackOrForward(moveBackOrForwardSteps);
-    }
-
-    @Override
-    public void onClearHistory() {
-        // Clear the history.
-        mainWebView.clearHistory();
-    }
-
-    // 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);
@@ -3427,21 +3092,20 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 drawerLayout.closeDrawer(GravityCompat.END);
             } else {  // A subfolder is displayed.
                 // Place the former parent folder in `currentFolder`.
-                currentBookmarksFolder = bookmarksDatabaseHelper.getParentFolder(currentBookmarksFolder);
+                currentBookmarksFolder = bookmarksDatabaseHelper.getParentFolderName(currentBookmarksFolder);
 
                 // Load the new folder.
                 loadBookmarksFolder();
             }
+        } else if (currentWebView.canGoBack()) {  // There is at least one item in the current WebView history.
+            // Reset the current domain name so that navigation works if third-party requests are blocked.
+            currentWebView.resetCurrentDomainName();
 
-        } 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 `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
-            navigatingHistory = true;
+            // Set navigating history so that the domain settings are applied when the new URL is loaded.
+            currentWebView.setNavigatingHistory(true);
 
             // Go back.
-            mainWebView.goBack();
+            currentWebView.goBack();
         } else {  // There isn't anything to do in Privacy Browser.
             // Pass `onBackPressed()` to the system.
             super.onBackPressed();
@@ -3458,15 +3122,25 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         }
     }
 
-    private void loadUrlFromTextBox() throws UnsupportedEncodingException {
+    private void loadUrlFromTextBox() {
+        // Get a handle for the URL edit text.
+        EditText urlEditText = findViewById(R.id.url_edittext);
+
         // Get the text from urlTextBox and convert it to a string.  trim() removes white spaces from the beginning and end of the string.
-        String unformattedUrlString = urlTextBox.getText().toString().trim();
+        String unformattedUrlString = urlEditText.getText().toString().trim();
+
+        // Initialize the formatted URL string.
+        String url = "";
 
         // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
-        if ((Patterns.WEB_URL.matcher(unformattedUrlString).matches()) || (unformattedUrlString.startsWith("http://")) || (unformattedUrlString.startsWith("https://"))) {
-            // Add `http://` at the beginning if it is missing.  Otherwise the app will segfault.
-            if (!unformattedUrlString.startsWith("http")) {
-                unformattedUrlString = "http://" + unformattedUrlString;
+        if (unformattedUrlString.startsWith("content://")) {  // This is a Content URL.
+            // Load the entire content URL.
+            url = unformattedUrlString;
+        } else if (Patterns.WEB_URL.matcher(unformattedUrlString).matches() || unformattedUrlString.startsWith("http://") || unformattedUrlString.startsWith("https://") ||
+                unformattedUrlString.startsWith("file://")) {  // This is a standard URL.
+            // Add `https://` at the beginning if there is no protocol.  Otherwise the app will segfault.
+            if (!unformattedUrlString.startsWith("http") && !unformattedUrlString.startsWith("file://") && !unformattedUrlString.startsWith("content://")) {
+                unformattedUrlString = "https://" + unformattedUrlString;
             }
 
             // Initialize `unformattedUrl`.
@@ -3480,741 +3154,2139 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             }
 
             // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if `.get` was called on a `null` value.
-            final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
-            final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
-            final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
-            final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
-            final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
+            String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
+            String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
+            String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
+            String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
+            String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
 
             // Build the URI.
-            Uri.Builder formattedUri = new Uri.Builder();
-            formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
-
-            // Decode `formattedUri` as a `String` in `UTF-8`.
-            formattedUrlString = URLDecoder.decode(formattedUri.build().toString(), "UTF-8");
-        } else if (unformattedUrlString.isEmpty()){  // Load a blank web site.
-            // Load a blank string.
-            formattedUrlString = "";
-        } else {  // Search for the contents of the URL box.
-            // Sanitize the search input and convert it to a search.
-            final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
+            Uri.Builder uri = new Uri.Builder();
+            uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
+
+            // Decode the URI as a UTF-8 string in.
+            try {
+                url = URLDecoder.decode(uri.build().toString(), "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                // Do nothing.  The formatted URL string will remain blank.
+            }
+        } else if (!unformattedUrlString.isEmpty()){  // This is not a URL, but rather a search string.
+            // Create an encoded URL String.
+            String encodedUrlString;
+
+            // Sanitize the search input.
+            try {
+                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                encodedUrlString = "";
+            }
 
             // Add the base search URL.
-            formattedUrlString = searchURL + encodedUrlString;
+            url = searchURL + encodedUrlString;
+        }
+
+        // Clear the focus from the URL edit text.  Otherwise, proximate typing in the box will retain the colorized formatting instead of being reset during refocus.
+        urlEditText.clearFocus();
+
+        // Make it so.
+        loadUrl(url);
+    }
+
+    private void loadUrl(String url) {
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, url, true, false);
+
+        // Load the URL.
+        currentWebView.loadUrl(url, customHeaders);
+    }
+
+    public void findPreviousOnPage(View view) {
+        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
+        currentWebView.findNext(false);
+    }
+
+    public void findNextOnPage(View view) {
+        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
+        currentWebView.findNext(true);
+    }
+
+    public void closeFindOnPage(View view) {
+        // Get a handle for the views.
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
+        EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
+
+        // Delete the contents of `find_on_page_edittext`.
+        findOnPageEditText.setText(null);
+
+        // Clear the highlighted phrases.
+        currentWebView.clearMatches();
+
+        // Hide the find on page linear layout.
+        findOnPageLinearLayout.setVisibility(View.GONE);
+
+        // Show the toolbar.
+        toolbar.setVisibility(View.VISIBLE);
+
+        // Get a handle for the input method manager.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
+
+        // Hide the keyboard.
+        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+    }
+
+    private void applyAppSettings() {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+        // Store the values from the shared preferences in variables.
+        incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
+        boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
+        proxyThroughOrbot = sharedPreferences.getBoolean("proxy_through_orbot", false);
+        fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
+        hideAppBar = sharedPreferences.getBoolean("hide_app_bar", true);
+
+        // Get handles for the views that need to be modified.  `getSupportActionBar()` must be used until the minimum API >= 21.
+        FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+        ActionBar actionBar = getSupportActionBar();
+
+        // Remove the incorrect lint warnings below that the action bar might be null.
+        assert actionBar != null;
+
+        // Apply the proxy through Orbot settings.
+        applyProxyThroughOrbot(false);
+
+        // Set Do Not Track status.
+        if (doNotTrackEnabled) {
+            customHeaders.put("DNT", "1");
+        } else {
+            customHeaders.remove("DNT");
+        }
+
+        // Set the app bar scrolling for each WebView.
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
+
+            // Only modify the WebViews if they exist.
+            if (fragmentView != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+
+                // Set the app bar scrolling.
+                nestedScrollWebView.setNestedScrollingEnabled(sharedPreferences.getBoolean("scroll_app_bar", true));
+            }
+        }
+
+        // Update the full screen browsing mode settings.
+        if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
+            // Update the visibility of the app bar, which might have changed in the settings.
+            if (hideAppBar) {
+                actionBar.hide();
+            } else {
+                actionBar.show();
+            }
+
+            // Hide the banner ad in the free flavor.
+            if (BuildConfig.FLAVOR.contentEquals("free")) {
+                AdHelper.hideAd(findViewById(R.id.adview));
+            }
+
+            // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+
+            /* Hide the system bars.
+             * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+             * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+             */
+            rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                    View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+        } else {  // Privacy Browser is not in full screen browsing mode.
+            // Reset the full screen tracker, which could be true if Privacy Browser was in full screen mode before entering settings and full screen browsing was disabled.
+            inFullScreenBrowsingMode = false;
+
+            // Show the app bar.
+            actionBar.show();
+
+            // Show the banner ad in the free flavor.
+            if (BuildConfig.FLAVOR.contentEquals("free")) {
+                // Initialize the ads.  If this isn't the first run, `loadAd()` will be automatically called instead.
+                AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getSupportFragmentManager(), getString(R.string.google_app_id), getString(R.string.ad_unit_id));
+            }
+
+            // Remove the `SYSTEM_UI` flags from the root frame layout.
+            rootFrameLayout.setSystemUiVisibility(0);
+
+            // Add the translucent status flag.
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+        }
+    }
+
+
+    // `reloadWebsite` is used if returning from the Domains activity.  Otherwise JavaScript might not function correctly if it is newly enabled.
+    @SuppressLint("SetJavaScriptEnabled")
+    private boolean applyDomainSettings(NestedScrollWebView nestedScrollWebView, String url, boolean resetFavoriteIcon, boolean reloadWebsite) {
+        // Store a copy of the current user agent to track changes for the return boolean.
+        String initialUserAgent = nestedScrollWebView.getSettings().getUserAgentString();
+
+        // Parse the URL into a URI.
+        Uri uri = Uri.parse(url);
+
+        // Extract the domain from `uri`.
+        String newHostName = uri.getHost();
+
+        // Strings don't like to be null.
+        if (newHostName == null) {
+            newHostName = "";
         }
 
-        // 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();
+        // Only apply the domain settings if a new domain is being loaded.  This allows the user to set temporary settings for JavaScript, cookies, DOM storage, etc.
+        if (!nestedScrollWebView.getCurrentDomainName().equals(newHostName)) {
+            // Set the new host name as the current domain name.
+            nestedScrollWebView.setCurrentDomainName(newHostName);
+
+            // Reset the ignoring of pinned domain information.
+            nestedScrollWebView.setIgnorePinnedDomainInformation(false);
+
+            // Clear any pinned SSL certificate or IP addresses.
+            nestedScrollWebView.clearPinnedSslCertificate();
+            nestedScrollWebView.clearPinnedIpAddresses();
+
+            // Reset the favorite icon if specified.
+            if (resetFavoriteIcon) {
+                // Initialize the favorite icon.
+                nestedScrollWebView.initializeFavoriteIcon();
+
+                // Get a handle for the tab layout.
+                TabLayout tabLayout = findViewById(R.id.tablayout);
+
+                // Get the current tab.
+                TabLayout.Tab currentTab = tabLayout.getTabAt(tabLayout.getSelectedTabPosition());  // TODO.  We need to get the tab for this WebView, which might not be the current tab.
+
+                // Remove the warning below that the current tab might be null.
+                assert currentTab != null;
+
+                // Get the current tab custom view.
+                View currentTabCustomView = currentTab.getCustomView();
+
+                // Remove the warning below that the current tab custom view might be null.
+                assert currentTabCustomView != null;
+
+                // Get the current tab favorite icon image view.
+                ImageView currentTabFavoriteIconImageView = currentTabCustomView.findViewById(R.id.favorite_icon_imageview);
+
+                // Set the default favorite icon as the favorite icon for this tab.
+                currentTabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(nestedScrollWebView.getFavoriteOrDefaultIcon(), 64, 64, true));
+            }
+
+            // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
+            DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
+
+            // Get a full cursor from `domainsDatabaseHelper`.
+            Cursor domainNameCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
+
+            // Initialize `domainSettingsSet`.
+            Set<String> domainSettingsSet = new HashSet<>();
+
+            // Get the domain name column index.
+            int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
+
+            // Populate `domainSettingsSet`.
+            for (int i = 0; i < domainNameCursor.getCount(); i++) {
+                // Move `domainsCursor` to the current row.
+                domainNameCursor.moveToPosition(i);
+
+                // Store the domain name in `domainSettingsSet`.
+                domainSettingsSet.add(domainNameCursor.getString(domainNameColumnIndex));
+            }
+
+            // Close `domainNameCursor.
+            domainNameCursor.close();
+
+            // Initialize the domain name in database variable.
+            String domainNameInDatabase = null;
+
+            // Check the hostname against the domain settings set.
+            if (domainSettingsSet.contains(newHostName)) {  // The hostname is contained in the domain settings set.
+                // Record the domain name in the database.
+                domainNameInDatabase = newHostName;
+
+                // Set the domain settings applied tracker to true.
+                nestedScrollWebView.setDomainSettingsApplied(true);
+            } else {  // The hostname is not contained in the domain settings set.
+                // Set the domain settings applied tracker to false.
+                nestedScrollWebView.setDomainSettingsApplied(false);
+            }
+
+            // Check all the subdomains of the host name against wildcard domains in the domain cursor.
+            while (!nestedScrollWebView.getDomainSettingsApplied() && newHostName.contains(".")) {  // Stop checking if domain settings are already applied or there are no more `.` in the host name.
+                if (domainSettingsSet.contains("*." + newHostName)) {  // Check the host name prepended by `*.`.
+                    // Set the domain settings applied tracker to true.
+                    nestedScrollWebView.setDomainSettingsApplied(true);
+
+                    // Store the applied domain names as it appears in the database.
+                    domainNameInDatabase = "*." + newHostName;
+                }
+
+                // Strip out the lowest subdomain of of the host name.
+                newHostName = newHostName.substring(newHostName.indexOf(".") + 1);
+            }
+
+
+            // Get a handle for the shared preferences.
+            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+            // Store the general preference information.
+            String defaultFontSizeString = sharedPreferences.getString("font_size", getString(R.string.font_size_default_value));
+            String defaultUserAgentName = sharedPreferences.getString("user_agent", getString(R.string.user_agent_default_value));
+            boolean defaultSwipeToRefresh = sharedPreferences.getBoolean("swipe_to_refresh", true);
+            boolean displayWebpageImages = sharedPreferences.getBoolean("display_webpage_images", true);
+            boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
+
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
+
+            // Get handles for the views.
+            RelativeLayout urlRelativeLayout = findViewById(R.id.url_relativelayout);
+            SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+
+            // Initialize the user agent array adapter and string array.
+            ArrayAdapter<CharSequence> userAgentNamesArray = ArrayAdapter.createFromResource(this, R.array.user_agent_names, R.layout.spinner_item);
+            String[] userAgentDataArray = getResources().getStringArray(R.array.user_agent_data);
+
+            if (nestedScrollWebView.getDomainSettingsApplied()) {  // The url has custom domain settings.
+                // Get a cursor for the current host and move it to the first position.
+                Cursor currentDomainSettingsCursor = domainsDatabaseHelper.getCursorForDomainName(domainNameInDatabase);
+                currentDomainSettingsCursor.moveToFirst();
+
+                // Get the settings from the cursor.
+                nestedScrollWebView.setDomainSettingsDatabaseId(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper._ID)));
+                nestedScrollWebView.setDomainSettingsJavaScriptEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_JAVASCRIPT)) == 1);
+                nestedScrollWebView.setAcceptFirstPartyCookies(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES)) == 1);
+                boolean domainThirdPartyCookiesEnabled = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES)) == 1);
+                nestedScrollWebView.getSettings().setDomStorageEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)) == 1);
+                // Form data can be removed once the minimum API >= 26.
+                boolean saveFormData = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASY_LIST,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYLIST)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYPRIVACY)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_ANNOYANCE_LIST)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_SOCIAL_BLOCKING_LIST)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRA_PRIVACY,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_ULTRAPRIVACY)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS,
+                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.BLOCK_ALL_THIRD_PARTY_REQUESTS)) == 1);
+                String userAgentName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.USER_AGENT));
+                int fontSize = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE));
+                int swipeToRefreshInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SWIPE_TO_REFRESH));
+                int nightModeInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.NIGHT_MODE));
+                int displayWebpageImagesInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES));
+                boolean pinnedSslCertificate = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.PINNED_SSL_CERTIFICATE)) == 1);
+                String pinnedSslIssuedToCName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_COMMON_NAME));
+                String pinnedSslIssuedToOName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATION));
+                String pinnedSslIssuedToUName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATIONAL_UNIT));
+                String pinnedSslIssuedByCName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_COMMON_NAME));
+                String pinnedSslIssuedByOName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATION));
+                String pinnedSslIssuedByUName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATIONAL_UNIT));
+                boolean pinnedIpAddresses = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.PINNED_IP_ADDRESSES)) == 1);
+                String pinnedHostIpAddresses = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.IP_ADDRESSES));
+
+                // Create the pinned SSL date variables.
+                Date pinnedSslStartDate;
+                Date pinnedSslEndDate;
+
+                // Set the pinned SSL certificate start date to `null` if the saved date `long` is 0 because creating a new Date results in an error if the input is 0.
+                if (currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_START_DATE)) == 0) {
+                    pinnedSslStartDate = null;
+                } else {
+                    pinnedSslStartDate = new Date(currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_START_DATE)));
+                }
+
+                // Set the pinned SSL certificate end date to `null` if the saved date `long` is 0 because creating a new Date results in an error if the input is 0.
+                if (currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_END_DATE)) == 0) {
+                    pinnedSslEndDate = null;
+                } else {
+                    pinnedSslEndDate = new Date(currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_END_DATE)));
+                }
+
+                // If there is a pinned SSL certificate, store it in the WebView.
+                if (pinnedSslCertificate) {
+                    nestedScrollWebView.setPinnedSslCertificate(pinnedSslIssuedToCName, pinnedSslIssuedToOName, pinnedSslIssuedToUName, pinnedSslIssuedByCName, pinnedSslIssuedByOName, pinnedSslIssuedByUName,
+                            pinnedSslStartDate, pinnedSslEndDate);
+                }
+
+                // If there is a pinned IP address, store it in the WebView.
+                if (pinnedIpAddresses) {
+                    nestedScrollWebView.setPinnedIpAddresses(pinnedHostIpAddresses);
+                }
+
+                // Set night mode according to the night mode int.
+                switch (nightModeInt) {
+                    case DomainsDatabaseHelper.NIGHT_MODE_SYSTEM_DEFAULT:
+                        // Set night mode according to the current default.
+                        nestedScrollWebView.setNightMode(sharedPreferences.getBoolean("night_mode", false));
+                        break;
+
+                    case DomainsDatabaseHelper.NIGHT_MODE_ENABLED:
+                        // Enable night mode.
+                        nestedScrollWebView.setNightMode(true);
+                        break;
+
+                    case DomainsDatabaseHelper.NIGHT_MODE_DISABLED:
+                        // Disable night mode.
+                        nestedScrollWebView.setNightMode(false);
+                        break;
+                }
+
+                // Enable JavaScript if night mode is enabled.
+                if (nestedScrollWebView.getNightMode()) {
+                    // Enable JavaScript.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(true);
+                } else {
+                    // Set JavaScript according to the domain settings.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(nestedScrollWebView.getDomainSettingsJavaScriptEnabled());
+                }
+
+                // Close the current host domain settings cursor.
+                currentDomainSettingsCursor.close();
+
+                // Apply the domain settings.
+                cookieManager.setAcceptCookie(nestedScrollWebView.getAcceptFirstPartyCookies());
+
+                // Set third-party cookies status if API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, domainThirdPartyCookiesEnabled);
+                }
+
+                // Apply the form data setting if the API < 26.
+                if (Build.VERSION.SDK_INT < 26) {
+                    nestedScrollWebView.getSettings().setSaveFormData(saveFormData);
+                }
+
+                // Apply the font size.
+                if (fontSize == 0) {  // Apply the default font size.
+                    nestedScrollWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
+                } else {  // Apply the specified font size.
+                    nestedScrollWebView.getSettings().setTextZoom(fontSize);
+                }
+
+                // Only set the user agent if the webpage is not currently loading.  Otherwise, changing the user agent on redirects can cause the original website to reload.
+                // <https://redmine.stoutner.com/issues/160>
+                if (nestedScrollWebView.getProgress() == 100) {  // A URL is not loading.
+                    // Set the user agent.
+                    if (userAgentName.equals(getString(R.string.system_default_user_agent))) {  // Use the system default user agent.
+                        // Get the array position of the default user agent name.
+                        int defaultUserAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
+
+                        // Set the user agent according to the system default.
+                        switch (defaultUserAgentArrayPosition) {
+                            case UNRECOGNIZED_USER_AGENT:  // The default user agent name is not on the canonical list.
+                                // This is probably because it was set in an older version of Privacy Browser before the switch to persistent user agent names.
+                                nestedScrollWebView.getSettings().setUserAgentString(defaultUserAgentName);
+                                break;
+
+                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                                // Set the user agent to `""`, which uses the default value.
+                                nestedScrollWebView.getSettings().setUserAgentString("");
+                                break;
+
+                            case SETTINGS_CUSTOM_USER_AGENT:
+                                // Set the default custom user agent.
+                                nestedScrollWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
+                                break;
+
+                            default:
+                                // Get the user agent string from the user agent data array
+                                nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[defaultUserAgentArrayPosition]);
+                        }
+                    } else {  // Set the user agent according to the stored name.
+                        // Get the array position of the user agent name.
+                        int userAgentArrayPosition = userAgentNamesArray.getPosition(userAgentName);
+
+                        switch (userAgentArrayPosition) {
+                            case UNRECOGNIZED_USER_AGENT:  // The user agent name contains a custom user agent.
+                                nestedScrollWebView.getSettings().setUserAgentString(userAgentName);
+                                break;
+
+                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                                // Set the user agent to `""`, which uses the default value.
+                                nestedScrollWebView.getSettings().setUserAgentString("");
+                                break;
+
+                            default:
+                                // Get the user agent string from the user agent data array.
+                                nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                        }
+                    }
+                }
+
+                // Set swipe to refresh.
+                switch (swipeToRefreshInt) {
+                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_SYSTEM_DEFAULT:
+                        // Store the swipe to refresh status in the nested scroll WebView.
+                        nestedScrollWebView.setSwipeToRefresh(defaultSwipeToRefresh);
+
+                        // Apply swipe to refresh according to the default.  This can be removed once the minimum API >= 23 because it is continuously set by an on scroll change listener.
+                        swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
+                        break;
+
+                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_ENABLED:
+                        // Store the swipe to refresh status in the nested scroll WebView.
+                        nestedScrollWebView.setSwipeToRefresh(true);
+
+                        // Enable swipe to refresh.  This can be removed once the minimum API >= 23 because it is continuously set by an on scroll change listener.
+                        swipeRefreshLayout.setEnabled(true);
+                        break;
+
+                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_DISABLED:
+                        // Store the swipe to refresh status in the nested scroll WebView.
+                        nestedScrollWebView.setSwipeToRefresh(false);
+
+                        // Disable swipe to refresh.  This can be removed once the minimum API >= 23 because it is continuously set by an on scroll change listener.
+                        swipeRefreshLayout.setEnabled(false);
+                }
+
+                // Set the loading of webpage images.
+                switch (displayWebpageImagesInt) {
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
+                        break;
+
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(true);
+                        break;
+
+                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
+                        nestedScrollWebView.getSettings().setLoadsImagesAutomatically(false);
+                        break;
+                }
+
+                // Set a green background on the URL relative layout to indicate that custom domain settings are being used. The deprecated `.getDrawable()` must be used until the minimum API >= 21.
+                if (darkTheme) {
+                    urlRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_dark_blue));
+                } else {
+                    urlRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_light_green));
+                }
+            } else {  // The new URL does not have custom domain settings.  Load the defaults.
+                // Store the values from the shared preferences.
+                boolean defaultJavaScriptEnabled = sharedPreferences.getBoolean("javascript", false);
+                nestedScrollWebView.setAcceptFirstPartyCookies(sharedPreferences.getBoolean("first_party_cookies", false));
+                boolean defaultThirdPartyCookiesEnabled = sharedPreferences.getBoolean("third_party_cookies", false);
+                nestedScrollWebView.getSettings().setDomStorageEnabled(sharedPreferences.getBoolean("dom_storage", false));
+                boolean saveFormData = sharedPreferences.getBoolean("save_form_data", false);  // Form data can be removed once the minimum API >= 26.
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASY_LIST, sharedPreferences.getBoolean("easylist", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY, sharedPreferences.getBoolean("easyprivacy", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, sharedPreferences.getBoolean("fanboys_annoyance_list", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, sharedPreferences.getBoolean("fanboys_social_blocking_list", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRA_PRIVACY, sharedPreferences.getBoolean("ultraprivacy", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, sharedPreferences.getBoolean("block_all_third_party_requests", false));
+                nestedScrollWebView.setNightMode(sharedPreferences.getBoolean("night_mode", false));
+
+                // Enable JavaScript if night mode is enabled.
+                if (nestedScrollWebView.getNightMode()) {
+                    // Enable JavaScript.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(true);
+                } else {
+                    // Set JavaScript according to the domain settings.
+                    nestedScrollWebView.getSettings().setJavaScriptEnabled(defaultJavaScriptEnabled);
+                }
+
+                // Apply the default settings.
+                cookieManager.setAcceptCookie(nestedScrollWebView.getAcceptFirstPartyCookies());
+                nestedScrollWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
+
+                // Apply the form data setting if the API < 26.
+                if (Build.VERSION.SDK_INT < 26) {
+                    nestedScrollWebView.getSettings().setSaveFormData(saveFormData);
+                }
+
+                // Store the swipe to refresh status in the nested scroll WebView.
+                nestedScrollWebView.setSwipeToRefresh(defaultSwipeToRefresh);
+
+                // Apply swipe to refresh according to the default.
+                swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
+
+                // Reset the pinned variables.
+                nestedScrollWebView.setDomainSettingsDatabaseId(-1);
+
+                // Set third-party cookies status if API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, defaultThirdPartyCookiesEnabled);
+                }
+
+                // Only set the user agent if the webpage is not currently loading.  Otherwise, changing the user agent on redirects can cause the original website to reload.
+                // <https://redmine.stoutner.com/issues/160>
+                if (nestedScrollWebView.getProgress() == 100) {  // A URL is not loading.
+                    // Get the array position of the user agent name.
+                    int userAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
+
+                    // Set the user agent.
+                    switch (userAgentArrayPosition) {
+                        case UNRECOGNIZED_USER_AGENT:  // The default user agent name is not on the canonical list.
+                            // This is probably because it was set in an older version of Privacy Browser before the switch to persistent user agent names.
+                            nestedScrollWebView.getSettings().setUserAgentString(defaultUserAgentName);
+                            break;
+
+                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                            // Set the user agent to `""`, which uses the default value.
+                            nestedScrollWebView.getSettings().setUserAgentString("");
+                            break;
+
+                        case SETTINGS_CUSTOM_USER_AGENT:
+                            // Set the default custom user agent.
+                            nestedScrollWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
+                            break;
+
+                        default:
+                            // Get the user agent string from the user agent data array
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                    }
+                }
+
+                // Set the loading of webpage images.
+                nestedScrollWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
+
+                // 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));
+            }
+
+            // Close the domains database helper.
+            domainsDatabaseHelper.close();
+
+            // Update the privacy icons.
+            updatePrivacyIcons(true);
+        }
+
+        // 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);
+    }
+
+    private void applyProxyThroughOrbot(boolean reloadWebsite) {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+        // Get the search and theme preferences.
+        String torSearchString = sharedPreferences.getString("tor_search", getString(R.string.tor_search_default_value));
+        String torSearchCustomUrlString = sharedPreferences.getString("tor_search_custom_url", getString(R.string.tor_search_custom_url_default_value));
+        String searchString = sharedPreferences.getString("search", getString(R.string.search_default_value));
+        String searchCustomUrlString = sharedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value));
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
+
+        // Get a handle for the action bar.  `getSupportActionBar()` must be used until the minimum API >= 21.
+        ActionBar actionBar = getSupportActionBar();
+
+        // Remove the incorrect lint warning later that the action bar might be null.
+        assert actionBar != null;
+
+        // Set the homepage, search, and proxy options.
+        if (proxyThroughOrbot) {  // Set the Tor options.
+            // Set the search URL.
+            if (torSearchString.equals("Custom URL")) {  // Get the custom URL string.
+                searchURL = torSearchCustomUrlString;
+            } else {  // Use the string from the pre-built list.
+                searchURL = torSearchString;
+            }
+
+            // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
+            OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
+
+            // Set the `appBar` background to indicate proxying through Orbot is enabled.
+            if (darkTheme) {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.dark_blue_30));
+            } else {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.blue_50));
+            }
+
+            // Check to see if Orbot is ready.
+            if (!orbotStatus.equals("ON")) {  // Orbot is not ready.
+                // Set `waitingForOrbot`.
+                waitingForOrbot = true;
+
+                // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
+                currentWebView.getSettings().setUseWideViewPort(false);
+
+                // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
+                currentWebView.loadData("<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>", "text/html", null);
+            } else if (reloadWebsite) {  // Orbot is ready and the website should be reloaded.
+                // Reload the website.
+                currentWebView.reload();
+            }
+        } else {  // Set the non-Tor options.
+            // Set the search URL.
+            if (searchString.equals("Custom URL")) {  // Get the custom URL string.
+                searchURL = searchCustomUrlString;
+            } else {  // Use the string from the pre-built list.
+                searchURL = searchString;
+            }
+
+            // Reset the proxy to default.  The host is `""` and the port is `"0"`.
+            OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
+
+            // Set the default `appBar` background.
+            if (darkTheme) {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_900));
+            } else {
+                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_100));
+            }
+
+            // Reset `waitingForOrbot.
+            waitingForOrbot = false;
+
+            // Reload the WebViews if requested.
+            if (reloadWebsite) {
+                // Reload the WebViews.
+                for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                    // Get the WebView tab fragment.
+                    WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+
+                    // Get the fragment view.
+                    View fragmentView = webViewTabFragment.getView();
+
+                    // Only reload the WebViews if they exist.
+                    if (fragmentView != null) {
+                        // Get the nested scroll WebView from the tab fragment.
+                        NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+
+                        // Reload the WebView.
+                        nestedScrollWebView.reload();
+                    }
+                }
+            }
+        }
+    }
+
+    private void updatePrivacyIcons(boolean runInvalidateOptionsMenu) {
+        // Only update the privacy icons if the options menu and the current WebView have already been populated.
+        if ((optionsMenu != null) && (currentWebView != null)) {
+            // Get a handle for the shared preferences.
+            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+            // Get the theme and screenshot preferences.
+            boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
+
+            // Get handles for the menu items.
+            MenuItem privacyMenuItem = optionsMenu.findItem(R.id.toggle_javascript);
+            MenuItem firstPartyCookiesMenuItem = optionsMenu.findItem(R.id.toggle_first_party_cookies);
+            MenuItem domStorageMenuItem = optionsMenu.findItem(R.id.toggle_dom_storage);
+            MenuItem refreshMenuItem = optionsMenu.findItem(R.id.refresh);
+
+            // Update the privacy icon.
+            if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is enabled.
+                privacyMenuItem.setIcon(R.drawable.javascript_enabled);
+            } else if (currentWebView.getAcceptFirstPartyCookies()) {  // JavaScript is disabled but cookies are enabled.
+                privacyMenuItem.setIcon(R.drawable.warning);
+            } else {  // All the dangerous features are disabled.
+                privacyMenuItem.setIcon(R.drawable.privacy_mode);
+            }
+
+            // Update the first-party cookies icon.
+            if (currentWebView.getAcceptFirstPartyCookies()) {  // First-party cookies are enabled.
+                firstPartyCookiesMenuItem.setIcon(R.drawable.cookies_enabled);
+            } else {  // First-party cookies are disabled.
+                if (darkTheme) {
+                    firstPartyCookiesMenuItem.setIcon(R.drawable.cookies_disabled_dark);
+                } else {
+                    firstPartyCookiesMenuItem.setIcon(R.drawable.cookies_disabled_light);
+                }
+            }
+
+            // Update the DOM storage icon.
+            if (currentWebView.getSettings().getJavaScriptEnabled() && currentWebView.getSettings().getDomStorageEnabled()) {  // Both JavaScript and DOM storage are enabled.
+                domStorageMenuItem.setIcon(R.drawable.dom_storage_enabled);
+            } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is enabled but DOM storage is disabled.
+                if (darkTheme) {
+                    domStorageMenuItem.setIcon(R.drawable.dom_storage_disabled_dark);
+                } else {
+                    domStorageMenuItem.setIcon(R.drawable.dom_storage_disabled_light);
+                }
+            } else {  // JavaScript is disabled, so DOM storage is ghosted.
+                if (darkTheme) {
+                    domStorageMenuItem.setIcon(R.drawable.dom_storage_ghosted_dark);
+                } else {
+                    domStorageMenuItem.setIcon(R.drawable.dom_storage_ghosted_light);
+                }
+            }
+
+            // Update the refresh icon.
+            if (darkTheme) {
+                refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
+            } else {
+                refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
+            }
+
+            // `invalidateOptionsMenu` calls `onPrepareOptionsMenu()` and redraws the icons in the `AppBar`.
+            if (runInvalidateOptionsMenu) {
+                invalidateOptionsMenu();
+            }
+        }
+    }
+
+    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();
+
+        // Set the URI and the MIME type.  Specifying `text/html` displays a good number of options.
+        downloadIntent.setDataAndType(Uri.parse(url), "text/html");
+
+        // 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)));
+    }
+
+    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;
+                }
+
+                // Get the index of the last `.` in the domain.
+                int lastDotIndex = baseUrl.lastIndexOf(".");
+
+                // Get the index of the penultimate `.` in the domain.
+                int penultimateDotIndex = baseUrl.lastIndexOf(".", lastDotIndex - 1);
+
+                // Markup the beginning of the URL.
+                if (urlString.startsWith("http://")) {  // Highlight the protocol of connections that are not encrypted.
+                    urlEditText.getText().setSpan(redColorSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+
+                    // De-emphasize subdomains.
+                    if (penultimateDotIndex > 0) {  // There is more than one subdomain in the domain name.
+                        urlEditText.getText().setSpan(initialGrayColorSpan, 7, penultimateDotIndex + 1, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+                    }
+                } else if (urlString.startsWith("https://")) {  // De-emphasize the protocol of connections that are encrypted.
+                    if (penultimateDotIndex > 0) {  // There is more than one subdomain in the domain name.
+                        // De-emphasize the protocol and the additional subdomains.
+                        urlEditText.getText().setSpan(initialGrayColorSpan, 0, penultimateDotIndex + 1, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+                    } else {  // There is only one subdomain in the domain name.
+                        // De-emphasize only the protocol.
+                        urlEditText.getText().setSpan(initialGrayColorSpan, 0, 8, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+                    }
+                }
+
+                // De-emphasize the text after the domain name.
+                if (endOfDomainName > 0) {
+                    urlEditText.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+                }
+            }
+        }
+    }
+
+    private void loadBookmarksFolder() {
+        // Update the bookmarks cursor with the contents of the bookmarks database for the current folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+
+        // Populate the bookmarks cursor adapter.  `this` specifies the `Context`.  `false` disables `autoRequery`.
+        bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
+            @Override
+            public View newView(Context context, Cursor cursor, ViewGroup parent) {
+                // Inflate the individual item layout.  `false` does not attach it to the root.
+                return getLayoutInflater().inflate(R.layout.bookmarks_drawer_item_linearlayout, parent, false);
+            }
+
+            @Override
+            public void bindView(View view, Context context, Cursor cursor) {
+                // Get handles for the views.
+                ImageView bookmarkFavoriteIcon = view.findViewById(R.id.bookmark_favorite_icon);
+                TextView bookmarkNameTextView = view.findViewById(R.id.bookmark_name);
+
+                // Get the favorite icon byte array from the cursor.
+                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
+
+                // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
+                Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
+
+                // Display the bitmap in `bookmarkFavoriteIcon`.
+                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
+
+                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
+                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+                bookmarkNameTextView.setText(bookmarkNameString);
+
+                // Make the font bold for folders.
+                if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
+                    bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
+                } else {  // Reset the font to default for normal bookmarks.
+                    bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
+                }
+            }
+        };
+
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+
+        // Populate the list view with the adapter.
+        bookmarksListView.setAdapter(bookmarksCursorAdapter);
+
+        // Get a handle for the bookmarks title text view.
+        TextView bookmarksTitleTextView = findViewById(R.id.bookmarks_title_textview);
+
+        // Set the bookmarks drawer title.
+        if (currentBookmarksFolder.isEmpty()) {
+            bookmarksTitleTextView.setText(R.string.bookmarks);
+        } else {
+            bookmarksTitleTextView.setText(currentBookmarksFolder);
+        }
+    }
+
+    private void openWithApp(String url) {
+        // Create the open with intent with `ACTION_VIEW`.
+        Intent openWithAppIntent = new Intent(Intent.ACTION_VIEW);
+
+        // Set the URI but not the MIME type.  This should open all available apps.
+        openWithAppIntent.setData(Uri.parse(url));
+
+        // Flag the intent to open in a new task.
+        openWithAppIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+        // Show the chooser.
+        startActivity(openWithAppIntent);
+    }
+
+    private void openWithBrowser(String url) {
+        // Create the open with intent with `ACTION_VIEW`.
+        Intent openWithBrowserIntent = new Intent(Intent.ACTION_VIEW);
+
+        // 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);
+    }
+
+    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);
+
+        // 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();
+
+        // Add a new tab.
+        tabLayout.addTab(tabLayout.newTab());
+
+        // Get the new tab.
+        TabLayout.Tab newTab = tabLayout.getTabAt(newTabNumber);
+
+        // Remove the lint warning below that the current tab might be null.
+        assert newTab != null;
+
+        // Set a custom view on the new tab.
+        newTab.setCustomView(R.layout.custom_tab_view);
+
+        // Add the new WebView page.
+        webViewPagerAdapter.addPage(newTabNumber, webViewPager);
+    }
+
+    private void setCurrentWebView(int pageNumber) {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+        // Get the theme preference.
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
+
+        // Get handles for the URL views.
+        RelativeLayout urlRelativeLayout = findViewById(R.id.url_relativelayout);
+        EditText urlEditText = findViewById(R.id.url_edittext);
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+
+        //Stop the swipe to refresh indicator if it is running
+        swipeRefreshLayout.setRefreshing(false);
+
+        // Get the WebView tab fragment.
+        WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(pageNumber);
+
+        // Get the fragment view.
+        View fragmentView = webViewTabFragment.getView();
+
+        // Set the current WebView if the fragment view is not null.
+        if (fragmentView != null) {
+            // Store the current WebView.
+            currentWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+
+            // Update the status of swipe to refresh.
+            if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
+                if (Build.VERSION.SDK_INT >= 23) {  // For API >= 23, swipe refresh layout is continuously updated with an on scroll change listener and only enabled if the WebView is scrolled to the top.
+                    // Enable the swipe refresh layout if the WebView is scrolled all the way to the top.
+                    swipeRefreshLayout.setEnabled(currentWebView.getY() == 0);
+                } else {
+                    // Enable the swipe refresh layout.
+                    swipeRefreshLayout.setEnabled(true);
+                }
+            } else {  // Swipe to refresh is disabled.
+                // Disable the swipe refresh layout.
+                swipeRefreshLayout.setEnabled(false);
+            }
+
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
+
+            // Set the first-party cookie status.
+            cookieManager.setAcceptCookie(currentWebView.getAcceptFirstPartyCookies());
+
+            // Update the privacy icons.  `true` redraws the icons in the app bar.
+            updatePrivacyIcons(true);
+
+            // Clear the focus from the URL text box.
+            urlEditText.clearFocus();
+
+            // Get a handle for the input method manager.
+            InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+
+            // Remove the lint warning below that the input method manager might be null.
+            assert inputMethodManager != null;
+
+            // Hide the soft keyboard.
+            inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+
+            // Display the current URL in the URL text box.
+            urlEditText.setText(currentWebView.getUrl());
+
+            // Highlight the URL text.
+            highlightUrlText();
+
+            // Set the background to indicate the domain settings status.
+            if (currentWebView.getDomainSettingsApplied()) {
+                // Set a green background on the URL relative layout to indicate that custom domain settings are being used. The deprecated `.getDrawable()` must be used until the minimum API >= 21.
+                if (darkTheme) {
+                    urlRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_dark_blue));
+                } else {
+                    urlRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_light_green));
+                }
+            } else {
+                urlRelativeLayout.setBackground(getResources().getDrawable(R.color.transparent));
+            }
+        }
+    }
+
+    @Override
+    public void initializeWebView(NestedScrollWebView nestedScrollWebView, int pageNumber, ProgressBar progressBar) {
+        // Get handles for the activity views.
+        FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+        RelativeLayout mainContentRelativeLayout = findViewById(R.id.main_content_relativelayout);
+        ActionBar actionBar = getSupportActionBar();
+        EditText urlEditText = findViewById(R.id.url_edittext);
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+
+        // Remove the incorrect lint warnings below that the some of the views might be null.
+        assert actionBar != null;
+
+        // Get a handle for the activity
+        Activity activity = this;
+
+        // Get a handle for the input method manager.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+
+        // Instantiate the blocklist helper.
+        BlockListHelper blockListHelper = new BlockListHelper();
+
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
+
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+        // Get the relevant preferences.
+        boolean downloadWithExternalApp = sharedPreferences.getBoolean("download_with_external_app", false);
+
+        // Initialize the favorite icon.
+        nestedScrollWebView.initializeFavoriteIcon();
+
+        // Set the app bar scrolling.
+        nestedScrollWebView.setNestedScrollingEnabled(sharedPreferences.getBoolean("scroll_app_bar", true));
+
+        // Allow pinch to zoom.
+        nestedScrollWebView.getSettings().setBuiltInZoomControls(true);
+
+        // Hide zoom controls.
+        nestedScrollWebView.getSettings().setDisplayZoomControls(false);
+
+        // Don't allow mixed content (HTTP and HTTPS) on the same website.
+        if (Build.VERSION.SDK_INT >= 21) {
+            nestedScrollWebView.getSettings().setMixedContentMode(WebSettings.MIXED_CONTENT_NEVER_ALLOW);
+        }
+
+        // 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);
+
+        // Set the WebView to load in overview mode (zoomed out to the maximum width).
+        nestedScrollWebView.getSettings().setLoadWithOverviewMode(true);
+
+        // Explicitly disable geolocation.
+        nestedScrollWebView.getSettings().setGeolocationEnabled(false);
+
+        // 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;
+
+                    // Toggle the full screen browsing mode.
+                    if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
+                        // Hide the app bar if specified.
+                        if (hideAppBar) {
+                            actionBar.hide();
+                        }
+
+                        // Hide the banner ad in the free flavor.
+                        if (BuildConfig.FLAVOR.contentEquals("free")) {
+                            AdHelper.hideAd(findViewById(R.id.adview));
+                        }
+
+                        // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+
+                        /* Hide the system bars.
+                         * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                         * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                         * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                         * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                         */
+                        rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                                View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+                    } else {  // Switch to normal viewing mode.
+                        // 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;
+                }
+            }
+        });
+
+        // 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);
+
+        // 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();
+
+                // Set the URI and the MIME type.  Specifying `text/html` displays a good number of options.
+                downloadIntent.setDataAndType(Uri.parse(url), "text/html");
+
+                // 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)));
+            } 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.
+
+                    // Store the variables for future use by `onRequestPermissionsResult()`.
+                    downloadUrl = url;
+                    downloadContentDisposition = contentDisposition;
+                    downloadContentLength = contentLength;
+
+                    // 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(getSupportFragmentManager(), getString(R.string.download_location));
+                    } else {  // Show the permission request directly.
+                        // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
+                        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
+                    }
+                } else {  // The storage permission has already been granted.
+                    // Get a handle for the download file alert dialog.
+                    DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
+
+                    // Show the download file alert dialog.
+                    downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
+                }
+            }
+        });
+
+        // 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);
+
+            @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);
+                }
+            }
+        });
+
+        if (Build.VERSION.SDK_INT >= 23) {
+            nestedScrollWebView.setOnScrollChangeListener((View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) -> {
+                // Update the status of swipe to refresh if it is enabled.
+                if (nestedScrollWebView.getSwipeToRefresh()) {
+                    // Only enable swipe to refresh if the WebView is scrolled to the top.
+                    swipeRefreshLayout.setEnabled(scrollY == 0);
+                }
+            });
+        }
+
+        // Set the web chrome client.
+        nestedScrollWebView.setWebChromeClient(new WebChromeClient() {
+            // Update the progress bar when a page is loading.
+            @Override
+            public void onProgressChanged(WebView view, int progress) {
+                // Inject the night mode CSS if night mode is enabled.
+                if (nestedScrollWebView.getNightMode()) {
+                    // `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);
+                            }
+                        };
+
+                        // Displaying of `mainWebView` after 500 milliseconds.
+                        displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
+                    });
+                }
+
+                // Update the progress bar.
+                progressBar.setProgress(progress);
+
+                // 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);
+
+                    // Display the nested scroll WebView if night mode is disabled.
+                    // Because of a race condition between `applyDomainSettings` and `onPageStarted`,
+                    // when night mode is set by domain settings the WebView may be hidden even if night mode is not currently enabled.
+                    if (!nestedScrollWebView.getNightMode()) {
+                        nestedScrollWebView.setVisibility(View.VISIBLE);
+                    }
+
+                    //Stop the swipe to refresh indicator if it is running
+                    swipeRefreshLayout.setRefreshing(false);
+                }
+            }
+
+            // Set the favorite icon when it changes.
+            @Override
+            public void onReceivedIcon(WebView view, Bitmap icon) {
+                // Only update the favorite icon if the website has finished loading.
+                if (progressBar.getVisibility() == View.GONE) {
+                    // Store the new favorite icon.
+                    nestedScrollWebView.setFavoriteOrDefaultIcon(icon);
+
+                    // Get the current page position.
+                    int currentPosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
+
+                    // Get the current tab.
+                    TabLayout.Tab tab = tabLayout.getTabAt(currentPosition);
+
+                    // Check to see if the tab has been populated.
+                    if (tab != null) {
+                        // Get the custom view from the tab.
+                        View tabView = tab.getCustomView();
+
+                        // Check to see if the custom tab view has been populated.
+                        if (tabView != null) {
+                            // Get the favorite icon image view from the tab.
+                            ImageView tabFavoriteIconImageView = tabView.findViewById(R.id.favorite_icon_imageview);
+
+                            // Display the favorite icon in the tab.
+                            tabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
+                        }
+                    }
+                }
+            }
+
+            // Save a copy of the title when it changes.
+            @Override
+            public void onReceivedTitle(WebView view, String title) {
+                // Get the current page position.
+                int currentPosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
+
+                // Get the current tab.
+                TabLayout.Tab tab = tabLayout.getTabAt(currentPosition);
+
+                // Only populate the title text view if the tab has been fully created.
+                if (tab != null) {
+                    // Get the custom view from the tab.
+                    View tabView = tab.getCustomView();
+
+                    // Remove the incorrect warning below that the current tab view might be null.
+                    assert tabView != null;
+
+                    // Get the title text view from the tab.
+                    TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
+
+                    // Set the title as the tab text.
+                    tabTitleTextView.setText(title);
+                }
+            }
+
+            // Enter full screen video.
+            @Override
+            public void onShowCustomView(View video, CustomViewCallback callback) {
+                // Get a handle for the full screen video frame layout.
+                FrameLayout fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
+
+                // Set the full screen video flag.
+                displayingFullScreenVideo = true;
+
+                // Pause the ad if this is the free flavor.
+                if (BuildConfig.FLAVOR.contentEquals("free")) {
+                    // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
+                    AdHelper.pauseAd(findViewById(R.id.adview));
+                }
+
+                // Hide the keyboard.
+                inputMethodManager.hideSoftInputFromWindow(nestedScrollWebView.getWindowToken(), 0);
+
+                // Hide the main content relative layout.
+                mainContentRelativeLayout.setVisibility(View.GONE);
+
+                // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
+                drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
 
-        // Make it so.
-        loadUrl(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);
 
-    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;
+                /* 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);
 
-        // Apply the domain settings.
-        applyDomainSettings(url, true, false);
+                // Disable the sliding drawers.
+                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 
-        // Set `urlIsLoading` to prevent changes in the user agent on websites with redirects from reloading the current website.
-        urlIsLoading = true;
+                // Add the video view to the full screen video frame layout.
+                fullScreenVideoFrameLayout.addView(video);
 
-        // Load the URL.
-        mainWebView.loadUrl(url, customHeaders);
-    }
+                // Show the full screen video frame layout.
+                fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
+            }
 
-    public void findPreviousOnPage(View view) {
-        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
-        mainWebView.findNext(false);
-    }
+            // Exit full screen video.
+            @Override
+            public void onHideCustomView() {
+                // Get a handle for the full screen video frame layout.
+                FrameLayout fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
 
-    public void findNextOnPage(View view) {
-        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
-        mainWebView.findNext(true);
-    }
+                // Unset the full screen video flag.
+                displayingFullScreenVideo = false;
 
-    public void closeFindOnPage(View view) {
-        // Delete the contents of `find_on_page_edittext`.
-        findOnPageEditText.setText(null);
+                // Remove all the views from the full screen video frame layout.
+                fullScreenVideoFrameLayout.removeAllViews();
 
-        // Clear the highlighted phrases.
-        mainWebView.clearMatches();
+                // Hide the full screen video frame layout.
+                fullScreenVideoFrameLayout.setVisibility(View.GONE);
 
-        // Hide the Find on Page `RelativeLayout`.
-        findOnPageLinearLayout.setVisibility(View.GONE);
+                // Enable the sliding drawers.
+                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 
-        // Show the URL app bar.
-        supportAppBar.setVisibility(View.VISIBLE);
+                // Show the main content relative layout.
+                mainContentRelativeLayout.setVisibility(View.VISIBLE);
 
-        // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
-        inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
-    }
+                // Apply the appropriate full screen mode flags.
+                if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
+                    // Hide the app bar if specified.
+                    if (hideAppBar) {
+                        actionBar.hide();
+                    }
 
-    private void applyAppSettings() {
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                    // Hide the banner ad in the free flavor.
+                    if (BuildConfig.FLAVOR.contentEquals("free")) {
+                        AdHelper.hideAd(findViewById(R.id.adview));
+                    }
 
-        // Store the values from the shared preferences in variables.
-        String homepageString = sharedPreferences.getString("homepage", "https://searx.me/");
-        String torHomepageString = sharedPreferences.getString("tor_homepage", "http://ulrn6sryqaifefld.onion/");
-        String torSearchString = sharedPreferences.getString("tor_search", "http://ulrn6sryqaifefld.onion/?q=");
-        String torSearchCustomURLString = sharedPreferences.getString("tor_search_custom_url", "");
-        String searchString = sharedPreferences.getString("search", "https://searx.me/?q=");
-        String searchCustomURLString = sharedPreferences.getString("search_custom_url", "");
-        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);
-        displayWebpageImagesBoolean = sharedPreferences.getBoolean("display_webpage_images", true);
+                    // 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);
 
-        // Set the homepage, search, and proxy options.
-        if (proxyThroughOrbot) {  // Set the Tor options.
-            // Set `torHomepageString` as `homepage`.
-            homepage = torHomepageString;
+                    // Add the translucent status flag.
+                    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                }
 
-            // If formattedUrlString is null assign the homepage to it.
-            if (formattedUrlString == null) {
-                formattedUrlString = homepage;
+                // 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));
+                }
             }
 
-            // 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;
-            }
+            // 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;
 
-            // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
+                    // Create an intent to open a chooser based ont the file chooser parameters.
+                    Intent fileChooserIntent = fileChooserParams.createIntent();
 
-            // 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));
+                    // 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;
             }
+        });
 
-            // Display a message to the user if waiting for Orbot.
-            if (!orbotStatus.equals("ON")) {
-                // Set `waitingForOrbot`.
-                waitingForOrbot = 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.
+            @Override
+            public boolean shouldOverrideUrlLoading(WebView view, String url) {
+                if (url.startsWith("http")) {  // Load the URL in Privacy Browser.
+                    // Apply the domain settings for the new URL.  This doesn't do anything if the domain has not changed.
+                    boolean userAgentChanged = applyDomainSettings(nestedScrollWebView, url, true, false);
 
-                // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
-                mainWebView.loadData(waitingForOrbotHTMLString, "text/html", null);
-            }
-        } else {  // Set the non-Tor options.
-            // Set `homepageString` as `homepage`.
-            homepage = homepageString;
+                    // 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);
 
-            // If formattedUrlString is null assign the homepage to it.
-            if (formattedUrlString == null) {
-                formattedUrlString = homepage;
-            }
+                        // Returning true indicates that Privacy Browser is manually handling the loading of the URL.
+                        return true;
+                    } else {
+                        // Returning false causes the current WebView to handle the URL and prevents it from adding redirects to the history list.
+                        return false;
+                    }
+                } else if (url.startsWith("mailto:")) {  // Load the email address in an external email program.
+                    // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
+                    Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
 
-            // Set the 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;
-            }
+                    // Parse the url and set it as the data for the intent.
+                    emailIntent.setData(Uri.parse(url));
 
-            // Reset the proxy to default.  The host is `""` and the port is `"0"`.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
+                    // Open the email program in a new task instead of as part of Privacy Browser.
+                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            // 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));
-            }
+                    // Make it so.
+                    startActivity(emailIntent);
 
-            // Reset `waitingForOrbot.
-            waitingForOrbot = false;
-        }
+                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
+                    return true;
+                } else if (url.startsWith("tel:")) {  // Load the phone number in the dialer.
+                    // Open the dialer and load the phone number, but wait for the user to place the call.
+                    Intent dialIntent = new Intent(Intent.ACTION_DIAL);
 
-        // Set Do Not Track status.
-        if (doNotTrackEnabled) {
-            customHeaders.put("DNT", "1");
-        } else {
-            customHeaders.remove("DNT");
-        }
+                    // Add the phone number to the intent.
+                    dialIntent.setData(Uri.parse(url));
 
-        // 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);
+                    // Open the dialer in a new task instead of as part of Privacy Browser.
+                    dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-                // Remove the translucent status bar overlay.
-                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                    // Make it so.
+                    startActivity(dialIntent);
 
-                // 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);
+                    // 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);
 
-                /* 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);
+                    // Add the URL to the intent.
+                    genericIntent.setData(Uri.parse(url));
 
-                // Add the translucent status flag if it is unset.
-                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                    // List all apps that can handle the URL instead of just opening the first one.
+                    genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
 
-                if (translucentNavigationBarOnFullscreen) {
-                    // Set the navigation bar to be translucent.
-                    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
-                } else {
-                    // Set the navigation bar to be black.
-                    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
-                }
-            }
-        } else {  // Privacy Browser is not in full screen browsing mode.
-            // Reset the full screen tracker, which could be true if Privacy Browser was in full screen mode before entering settings and full screen browsing was disabled.
-            inFullScreenBrowsingMode = false;
+                    // Open the app in a new task instead of as part of Privacy Browser.
+                    genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            // Show the `appBar` if `findOnPageLinearLayout` is not visible.
-            if (findOnPageLinearLayout.getVisibility() == View.GONE) {
-                appBar.show();
-            }
+                    // 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();
+                    }
 
-            // 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.ad_id));
+                    // Returning true indicates Privacy Browser is handling the URL by creating an intent.
+                    return true;
+                }
             }
 
-            // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-            rootCoordinatorLayout.setSystemUiVisibility(0);
-
-            // Remove the translucent navigation bar flag if it is set.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+            // Check requests against the block lists.  The deprecated `shouldInterceptRequest()` must be used until minimum API >= 21.
+            @Override
+            public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
+                // Get a handle for the navigation view.
+                NavigationView navigationView = findViewById(R.id.navigationview);
 
-            // 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);
+                // Get a handle for the navigation menu.
+                Menu navigationMenu = navigationView.getMenu();
 
-            // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
-            rootCoordinatorLayout.setFitsSystemWindows(true);
-        }
-    }
+                // Get a handle for the navigation requests menu item.  The menu is 0 based.
+                MenuItem navigationRequestsMenuItem = navigationMenu.getItem(6);
 
-    // `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 void applyDomainSettings(String url, boolean resetFavoriteIcon, boolean reloadWebsite) {
-        // Parse the URL into a URI.
-        Uri uri = Uri.parse(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()));
 
-        // 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);
-        }
+                // Reset the whitelist results tracker.
+                String[] whitelistResultStringArray = null;
 
-        // Strings don't like to be null.
-        if (hostName == null) {
-            hostName = "";
-        }
+                // Initialize the third party request tracker.
+                boolean isThirdPartyRequest = false;
 
-        // 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;
+                // Get the current URL.  `.getUrl()` throws an error because operations on the WebView cannot be made from this thread.
+                String currentBaseDomain = nestedScrollWebView.getCurrentDomainName();
 
-            // Reset `ignorePinnedSslCertificate`.
-            ignorePinnedSslCertificate = false;
+                // Store a copy of the current domain for use in later requests.
+                String currentDomain = currentBaseDomain;
 
-            // Reset the favorite icon if specified.
-            if (resetFavoriteIcon) {
-                favoriteIconBitmap = favoriteIconDefaultBitmap;
-                favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(favoriteIconBitmap, 64, 64, true));
-            }
+                // Nobody is happy when comparing null strings.
+                if ((currentBaseDomain != null) && (url != null)) {
+                    // Convert the request URL to a URI.
+                    Uri requestUri = Uri.parse(url);
 
-            // Initialize the database handler.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
-            // The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
-            DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
+                    // Get the request host name.
+                    String requestBaseDomain = requestUri.getHost();
 
-            // Get a full cursor from `domainsDatabaseHelper`.
-            Cursor domainNameCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
+                    // Only check for third-party requests if the current base domain is not empty and the request domain is not null.
+                    if (!currentBaseDomain.isEmpty() && (requestBaseDomain != null)) {
+                        // Determine the current base domain.
+                        while (currentBaseDomain.indexOf(".", currentBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
+                            // Remove the first subdomain.
+                            currentBaseDomain = currentBaseDomain.substring(currentBaseDomain.indexOf(".") + 1);
+                        }
 
-            // Initialize `domainSettingsSet`.
-            Set<String> domainSettingsSet = new HashSet<>();
+                        // 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);
+                        }
 
-            // Get the domain name column index.
-            int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
+                        // Update the third party request tracker.
+                        isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
+                    }
+                }
 
-            // Populate `domainSettingsSet`.
-            for (int i = 0; i < domainNameCursor.getCount(); i++) {
-                // Move `domainsCursor` to the current row.
-                domainNameCursor.moveToPosition(i);
+                // Get the current WebView page position.
+                int webViewPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-                // Store the domain name in `domainSettingsSet`.
-                domainSettingsSet.add(domainNameCursor.getString(domainNameColumnIndex));
-            }
+                // Determine if the WebView is currently displayed.
+                boolean webViewDisplayed = (webViewPagePosition == tabLayout.getSelectedTabPosition());
 
-            // Close `domainNameCursor.
-            domainNameCursor.close();
+                // Block third-party requests if enabled.
+                if (isThirdPartyRequest && nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS)) {
+                    // Add the result to the resource requests.
+                    nestedScrollWebView.addResourceRequest(new String[]{BlockListHelper.REQUEST_THIRD_PARTY, url});
+
+                    // Increment the blocked requests counters.
+                    nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                    nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS);
+
+                    // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                    if (webViewDisplayed) {
+                        // Updating the UI must be run from the UI thread.
+                        activity.runOnUiThread(() -> {
+                            // Update the menu item titles.
+                            navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                            // Update the options menu if it has been populated.
+                            if (optionsMenu != null) {
+                                optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                optionsMenu.findItem(R.id.block_all_third_party_requests).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " +
+                                        getString(R.string.block_all_third_party_requests));
+                            }
+                        });
+                    }
 
-            // Initialize variables to track if domain settings will be applied and, if so, under which name.
-            domainSettingsApplied = false;
-            String domainNameInDatabase = null;
+                    // Return an empty web resource response.
+                    return emptyWebResourceResponse;
+                }
 
-            // Check the hostname.
-            if (domainSettingsSet.contains(hostName)) {
-                domainSettingsApplied = true;
-                domainNameInDatabase = hostName;
-            }
+                // 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);
+
+                    // Process the UltraPrivacy results.
+                    if (ultraPrivacyResults[0].equals(BlockListHelper.REQUEST_BLOCKED)) {  // The resource request matched UltraPrivacy's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {ultraPrivacyResults[0], ultraPrivacyResults[1], ultraPrivacyResults[2], ultraPrivacyResults[3], ultraPrivacyResults[4],
+                                ultraPrivacyResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.ULTRA_PRIVACY);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsMenu.findItem(R.id.ultraprivacy).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.ULTRA_PRIVACY) + " - " + getString(R.string.ultraprivacy));
+                                }
+                            });
+                        }
 
-            // 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;
+                        // 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]});
 
-                    // Store the applied domain names as it appears in the database.
-                    domainNameInDatabase = "*." + hostName;
+                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
+                        return null;
+                    }
                 }
 
-                // Strip out the lowest subdomain of of the host name.
-                hostName = hostName.substring(hostName.indexOf(".") + 1);
-            }
+                // 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);
+
+                    // Process the EasyList results.
+                    if (easyListResults[0].equals(BlockListHelper.REQUEST_BLOCKED)) {  // The resource request matched EasyList's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {easyListResults[0], easyListResults[1], easyListResults[2], easyListResults[3], easyListResults[4], easyListResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.EASY_LIST);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsMenu.findItem(R.id.easylist).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASY_LIST) + " - " + getString(R.string.easylist));
+                                }
+                            });
+                        }
 
+                        // 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]};
+                    }
+                }
 
-            // Get a handle for the shared preference.
-            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // 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);
+
+                    // Process the EasyPrivacy results.
+                    if (easyPrivacyResults[0].equals(BlockListHelper.REQUEST_BLOCKED)) {  // The resource request matched EasyPrivacy's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {easyPrivacyResults[0], easyPrivacyResults[1], easyPrivacyResults[2], easyPrivacyResults[3], easyPrivacyResults[4],
+                                easyPrivacyResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.EASY_PRIVACY);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsMenu.findItem(R.id.easyprivacy).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASY_PRIVACY) + " - " + getString(R.string.easyprivacy));
+                                }
+                            });
+                        }
 
-            // Store the general preference information.
-            String defaultFontSizeString = sharedPreferences.getString("default_font_size", "100");
-            String defaultUserAgentName = sharedPreferences.getString("user_agent", "Privacy Browser");
-            String defaultCustomUserAgentString = sharedPreferences.getString("custom_user_agent", "PrivacyBrowser/1.0");
-            boolean defaultSwipeToRefresh = sharedPreferences.getBoolean("swipe_to_refresh", true);
-            nightMode = sharedPreferences.getBoolean("night_mode", false);
+                        // The resource request was blocked.  Return an empty web resource response.
+                        return emptyWebResourceResponse;
+                    } else if (easyPrivacyResults[0].equals(BlockListHelper.REQUEST_ALLOWED)) {  // The resource request matched EasyPrivacy's whitelist.
+                        // Update the whitelist result string array tracker.
+                        whitelistResultStringArray = new String[] {easyPrivacyResults[0], easyPrivacyResults[1], easyPrivacyResults[2], easyPrivacyResults[3], easyPrivacyResults[4], easyPrivacyResults[5]};
+                    }
+                }
 
-            if (domainSettingsApplied) {  // The url we are loading has custom domain settings.
-                // Get a cursor for the current host and move it to the first position.
-                Cursor currentHostDomainSettingsCursor = domainsDatabaseHelper.getCursorForDomainName(domainNameInDatabase);
-                currentHostDomainSettingsCursor.moveToFirst();
+                // Check Fanboy’s Annoyance List if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST)) {
+                    // Check the URL against Fanboy's Annoyance List.
+                    String[] fanboysAnnoyanceListResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList);
+
+                    // Process the Fanboy's Annoyance List results.
+                    if (fanboysAnnoyanceListResults[0].equals(BlockListHelper.REQUEST_BLOCKED)) {  // The resource request matched Fanboy's Annoyance List's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {fanboysAnnoyanceListResults[0], fanboysAnnoyanceListResults[1], fanboysAnnoyanceListResults[2], fanboysAnnoyanceListResults[3],
+                                fanboysAnnoyanceListResults[4], fanboysAnnoyanceListResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsMenu.findItem(R.id.fanboys_annoyance_list).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " +
+                                            getString(R.string.fanboys_annoyance_list));
+                                }
+                            });
+                        }
 
-                // 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));
-                displayWebpageImagesInt = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES));
-                pinnedDomainSslCertificate = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.PINNED_SSL_CERTIFICATE)) == 1);
-                pinnedDomainSslIssuedToCNameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_COMMON_NAME));
-                pinnedDomainSslIssuedToONameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATION));
-                pinnedDomainSslIssuedToUNameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATIONAL_UNIT));
-                pinnedDomainSslIssuedByCNameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_COMMON_NAME));
-                pinnedDomainSslIssuedByONameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATION));
-                pinnedDomainSslIssuedByUNameString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATIONAL_UNIT));
-
-                // Set `nightMode` according to `nightModeInt`.  If `nightModeInt` is `DomainsDatabaseHelper.NIGHT_MODE_SYSTEM_DEFAULT` the current setting from `sharedPreferences` will be used.
-                switch (nightModeInt) {
-                    case DomainsDatabaseHelper.NIGHT_MODE_ENABLED:
-                        nightMode = true;
-                        break;
+                        // The resource request was blocked.  Return an empty web resource response.
+                        return emptyWebResourceResponse;
+                    } else if (fanboysAnnoyanceListResults[0].equals(BlockListHelper.REQUEST_ALLOWED)){  // The resource request matched Fanboy's Annoyance List's whitelist.
+                        // Update the whitelist result string array tracker.
+                        whitelistResultStringArray = new String[] {fanboysAnnoyanceListResults[0], fanboysAnnoyanceListResults[1], fanboysAnnoyanceListResults[2], fanboysAnnoyanceListResults[3],
+                                fanboysAnnoyanceListResults[4], fanboysAnnoyanceListResults[5]};
+                    }
+                } else if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST)) {  // Only check Fanboy’s Social Blocking List if Fanboy’s Annoyance List is disabled.
+                    // Check the URL against Fanboy's Annoyance List.
+                    String[] fanboysSocialListResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, fanboysSocialList);
+
+                    // Process the Fanboy's Social Blocking List results.
+                    if (fanboysSocialListResults[0].equals(BlockListHelper.REQUEST_BLOCKED)) {  // The resource request matched Fanboy's Social Blocking List's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {fanboysSocialListResults[0], fanboysSocialListResults[1], fanboysSocialListResults[2], fanboysSocialListResults[3],
+                                fanboysSocialListResults[4], fanboysSocialListResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsMenu.findItem(R.id.fanboys_social_blocking_list).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " +
+                                            getString(R.string.fanboys_social_blocking_list));
+                                }
+                            });
+                        }
 
-                    case DomainsDatabaseHelper.NIGHT_MODE_DISABLED:
-                        nightMode = false;
-                        break;
+                        // 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 `javaScriptEnabled` to be `true` if `night_mode` is `true`.
-                if (nightMode) {
-                    javaScriptEnabled = true;
+                // Add the request to the log because it hasn't been processed by any of the previous checks.
+                if (whitelistResultStringArray != null) {  // The request was processed by a whitelist.
+                    nestedScrollWebView.addResourceRequest(whitelistResultStringArray);
+                } else {  // The request didn't match any blocklist entry.  Log it as a default request.
+                    nestedScrollWebView.addResourceRequest(new String[]{BlockListHelper.REQUEST_DEFAULT, url});
                 }
 
-                // Set 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)));
-                }
+                // The resource request has not been blocked.  `return null` loads the requested resource.
+                return null;
+            }
 
-                // 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)));
-                }
+            // Handle HTTP authentication requests.
+            @Override
+            public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
+                // Store the handler.
+                nestedScrollWebView.setHttpAuthHandler(handler);
 
-                // Close `currentHostDomainSettingsCursor`.
-                currentHostDomainSettingsCursor.close();
+                // Instantiate an HTTP authentication dialog.
+                DialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm, nestedScrollWebView.getWebViewFragmentId());
 
-                // Apply the domain settings.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
+                // Show the HTTP authentication dialog.
+                httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
+            }
 
-                // Apply the form data setting if the API < 26.
-                if (Build.VERSION.SDK_INT < 26) {
-                    mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
-                }
+            @Override
+            public void onPageStarted(WebView view, String url, Bitmap favicon) {
+                // Get the theme preference.
+                boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-                // Apply the font size.
-                if (fontSize == 0) {  // Apply the default font size.
-                    mainWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
-                } else {  // Apply the specified font size.
-                    mainWebView.getSettings().setTextZoom(fontSize);
-                }
+                // Reset the list of resource requests.
+                nestedScrollWebView.clearResourceRequests();
 
-                // Set third-party cookies status if API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
+                // Reset the requests counters.
+                nestedScrollWebView.resetRequestsCounters();
+
+                // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
+                if (nestedScrollWebView.getNightMode()) {
+                    nestedScrollWebView.setVisibility(View.INVISIBLE);
                 }
 
-                // 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);
+                // Hide the keyboard.
+                inputMethodManager.hideSoftInputFromWindow(nestedScrollWebView.getWindowToken(), 0);
 
-                        // 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;
+                // Check to see if Privacy Browser is waiting on Orbot.
+                if (!waitingForOrbot) {  // Process the URL.
+                    // Display the formatted URL text.
+                    urlEditText.setText(url);
 
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                mainWebView.getSettings().setUserAgentString("");
-                                break;
+                    // Apply text highlighting to `urlTextBox`.
+                    highlightUrlText();
 
-                            case SETTINGS_CUSTOM_USER_AGENT:
-                                // Set the custom user agent.
-                                mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
-                                break;
+                    // Reset the list of host IP addresses.
+                    nestedScrollWebView.clearCurrentIpAddresses();
 
-                            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);
+                    // Get a URI for the current URL.
+                    Uri currentUri = 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 IP addresses for the host.
+                    new GetHostIpAddresses(activity, getSupportFragmentManager(), nestedScrollWebView).execute(currentUri.getHost());
 
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                mainWebView.getSettings().setUserAgentString("");
-                                break;
+                    // Apply any custom domain settings if the URL was loaded by navigating history.
+                    if (nestedScrollWebView.getNavigatingHistory()) {
+                        // Reset navigating history.
+                        nestedScrollWebView.setNavigatingHistory(false);
 
-                            default:
-                                // Get the user agent string from the user agent data array.
-                                mainWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                        // Apply the domain settings.
+                        boolean userAgentChanged = applyDomainSettings(nestedScrollWebView, url, true, false);
+
+                        // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
+                        if (userAgentChanged) {
+                            loadUrl(url);
                         }
                     }
 
-                    // 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;
+                    // Replace Refresh with Stop if the options menu has been created.  (The WebView typically begins loading before the menu items are instantiated.)
+                    if (optionsMenu != null) {
+                        // Get a handle for the refresh menu item.
+                        MenuItem refreshMenuItem = optionsMenu.findItem(R.id.refresh);
 
-                        case DomainsDatabaseHelper.SWIPE_TO_REFRESH_ENABLED:
-                            // Enable swipe to refresh.
-                            swipeRefreshLayout.setEnabled(true);
-                            break;
+                        // Set the title.
+                        refreshMenuItem.setTitle(R.string.stop);
 
-                        case DomainsDatabaseHelper.SWIPE_TO_REFRESH_DISABLED:
-                            // Disable swipe to refresh.
-                            swipeRefreshLayout.setEnabled(false);
-                    }
+                        // Get the app bar and theme preferences.
+                        boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
 
-                    // Store the applied user agent string, which is used in the View Source activity.
-                    appliedUserAgentString = mainWebView.getSettings().getUserAgentString();
+                        // 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);
+                            }
+                        }
+                    }
                 }
+            }
 
-                // 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));
+            @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"));
                 }
-            } else {  // The new URL does not have custom domain settings.  Load the defaults.
-                // Store the values from `sharedPreferences` in variables.
-                javaScriptEnabled = sharedPreferences.getBoolean("javascript_enabled", false);
-                firstPartyCookiesEnabled = sharedPreferences.getBoolean("first_party_cookies_enabled", false);
-                thirdPartyCookiesEnabled = sharedPreferences.getBoolean("third_party_cookies_enabled", false);
-                domStorageEnabled = sharedPreferences.getBoolean("dom_storage_enabled", false);
-                saveFormDataEnabled = sharedPreferences.getBoolean("save_form_data_enabled", false);  // Form data can be removed once the minimum API >= 26.
-                easyListEnabled = sharedPreferences.getBoolean("easylist", true);
-                easyPrivacyEnabled = sharedPreferences.getBoolean("easyprivacy", true);
-                fanboysAnnoyanceListEnabled = sharedPreferences.getBoolean("fanboy_annoyance_list", true);
-                fanboysSocialBlockingListEnabled = sharedPreferences.getBoolean("fanboy_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;
+
+                // Flush any cookies to persistent storage.  The cookie manager has become very lazy about flushing cookies in recent versions.
+                if (nestedScrollWebView.getAcceptFirstPartyCookies() && Build.VERSION.SDK_INT >= 21) {
+                    CookieManager.getInstance().flush();
                 }
 
-                // Apply the default settings.
-                mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
-                cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
-                mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
-                mainWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
-                swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
+                // Update the Refresh menu item if the options menu has been created.
+                if (optionsMenu != null) {
+                    // Get a handle for the refresh menu item.
+                    MenuItem refreshMenuItem = optionsMenu.findItem(R.id.refresh);
 
-                // Apply the form data setting if the API < 26.
-                if (Build.VERSION.SDK_INT < 26) {
-                    mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
-                }
+                    // Reset the Refresh title.
+                    refreshMenuItem.setTitle(R.string.refresh);
 
-                // Reset the pinned SSL certificate information.
-                domainSettingsDatabaseId = -1;
-                pinnedDomainSslCertificate = false;
-                pinnedDomainSslIssuedToCNameString = "";
-                pinnedDomainSslIssuedToONameString = "";
-                pinnedDomainSslIssuedToUNameString = "";
-                pinnedDomainSslIssuedByCNameString = "";
-                pinnedDomainSslIssuedByONameString = "";
-                pinnedDomainSslIssuedByUNameString = "";
-                pinnedDomainSslStartDate = null;
-                pinnedDomainSslEndDate = null;
+                    // Get the app bar and theme preferences.
+                    boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
+                    boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-                // Set third-party cookies status if API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
+                    // If the icon is displayed in the AppBar, 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);
+                        }
+                    }
                 }
 
-                // 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);
+                // Clear the cache and history if Incognito Mode is enabled.
+                if (incognitoModeEnabled) {
+                    // Clear the cache.  `true` includes disk files.
+                    nestedScrollWebView.clearCache(true);
 
-                    // 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;
+                    // Clear the back/forward history.
+                    nestedScrollWebView.clearHistory();
 
-                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                            // Set the user agent to `""`, which uses the default value.
-                            mainWebView.getSettings().setUserAgentString("");
-                            break;
+                    // Manually delete cache folders.
+                    try {
+                        // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
+                        // which links to `/data/data/com.stoutner.privacybrowser.standard`.
+                        String privateDataDirectoryString = getApplicationInfo().dataDir;
 
-                        case SETTINGS_CUSTOM_USER_AGENT:
-                            // Set the custom user agent.
-                            mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
-                            break;
+                        // Delete the main cache directory.
+                        Runtime.getRuntime().exec("rm -rf " + privateDataDirectoryString + "/cache");
 
-                        default:
-                            // Get the user agent string from the user agent data array
-                            mainWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
+                        // Delete the secondary `Service Worker` cache directory.
+                        // A `String[]` must be used because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
+                        Runtime.getRuntime().exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
+                    } catch (IOException e) {
+                        // Do nothing if an error is thrown.
                     }
-
-                    // Store the applied user agent string, which is used in the View Source activity.
-                    appliedUserAgentString = mainWebView.getSettings().getUserAgentString();
                 }
 
-                // 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));
-            }
-
-            // Close `domainsDatabaseHelper`.
-            domainsDatabaseHelper.close();
+                // 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")) {  // The WebView is blank.
+                        // Display the hint in the URL edit text.
+                        urlEditText.setText("");
 
-            // Remove the `onTheFlyDisplayImagesSet` flag and set the display webpage images mode.  `true` indicates that custom domain settings are applied.
-            onTheFlyDisplayImagesSet = false;
-            setDisplayWebpageImages();
+                        // Request focus for `urlTextBox`.
+                        urlEditText.requestFocus();
 
-            // Update the privacy icons, but only if `mainMenu` has already been populated.
-            if (mainMenu != null) {
-                updatePrivacyIcons(true);
-            }
-        }
+                        // Display the keyboard.
+                        inputMethodManager.showSoftInput(urlEditText, 0);
 
-        // Reload the website if returning from the Domains activity.
-        if (reloadWebsite) {
-            mainWebView.reload();
-        }
-    }
+                        // Hide the WebView, which causes the default background color to be displayed according to the theme.
+                        nestedScrollWebView.setVisibility(View.GONE);
 
-    private void setDisplayWebpageImages() {
-        if (!onTheFlyDisplayImagesSet) {
-            if (domainSettingsApplied) {  // Custom domain settings are applied.
-                switch (displayWebpageImagesInt) {
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImagesBoolean);
-                        break;
+                        // Apply the domain settings.  This clears any settings from the previous domain.
+                        applyDomainSettings(nestedScrollWebView, "", true, false);
+                    } else {  // The WebView has loaded a webpage.
+                        // Only update the URL text box if the user is not typing in it.
+                        if (!urlEditText.hasFocus()) {
+                            // Display the final URL.  Getting the URL from the WebView instead of using the one provided by `onPageFinished` makes websites like YouTube function correctly.
+                            urlEditText.setText(nestedScrollWebView.getUrl());
 
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(true);
-                        break;
+                            // Apply text highlighting to `urlTextBox`.
+                            highlightUrlText();
+                        }
+                    }
 
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
-                        mainWebView.getSettings().setLoadsImagesAutomatically(false);
-                        break;
+                    // 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);
+                    }
                 }
-            } else {  // Default settings are applied.
-                mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImagesBoolean);
-            }
-        }
-    }
-
-    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);
-        }
-
-        // 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);
-            }
-        }
-
-        // Update the DOM storage icon.
-        if (javaScriptEnabled && domStorageEnabled) {  // Both JavaScript and DOM storage are enabled.
-            domStorageMenuItem.setIcon(R.drawable.dom_storage_enabled);
-        } else if (javaScriptEnabled) {  // JavaScript is enabled but DOM storage is disabled.
-            if (darkTheme) {
-                domStorageMenuItem.setIcon(R.drawable.dom_storage_disabled_dark);
-            } else {
-                domStorageMenuItem.setIcon(R.drawable.dom_storage_disabled_light);
-            }
-        } else {  // JavaScript is disabled, so DOM storage is ghosted.
-            if (darkTheme) {
-                domStorageMenuItem.setIcon(R.drawable.dom_storage_ghosted_dark);
-            } else {
-                domStorageMenuItem.setIcon(R.drawable.dom_storage_ghosted_light);
             }
-        }
-
-        // Update the refresh icon.
-        if (darkTheme) {
-            refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
-        } else {
-            refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
-        }
-
-        // `invalidateOptionsMenu` calls `onPrepareOptionsMenu()` and redraws the icons in the `AppBar`.
-        if (runInvalidateOptionsMenu) {
-            invalidateOptionsMenu();
-        }
-    }
-
-    private void highlightUrlText() {
-        String urlString = urlTextBox.getText().toString();
 
-        if (urlString.startsWith("http://")) {  // Highlight the protocol of connections that are not encrypted.
-            urlTextBox.getText().setSpan(redColorSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
-        } else if (urlString.startsWith("https://")) {  // De-emphasize the protocol of connections that are encrypted.
-            urlTextBox.getText().setSpan(initialGrayColorSpan, 0, 8, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
-        }
+            // 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 index of the `/` immediately after the domain name.
-        int endOfDomainName = urlString.indexOf("/", (urlString.indexOf("//") + 2));
+                // 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();
 
-        // De-emphasize the text after the domain name.
-        if (endOfDomainName > 0) {
-            urlTextBox.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
-        }
-    }
+                // Proceed to the website if the current SSL website certificate matches the pinned domain certificate.
+                if (nestedScrollWebView.hasPinnedSslCertificate()) {
+                    // Get the pinned SSL certificate.
+                    ArrayList<Object> pinnedSslCertificateArrayList = nestedScrollWebView.getPinnedSslCertificate();
+
+                    // Extract the arrays from the array list.
+                    String[] pinnedSslCertificateStringArray = (String[]) pinnedSslCertificateArrayList.get(0);
+                    Date[] pinnedSslCertificateDateArray = (Date[]) pinnedSslCertificateArrayList.get(1);
+
+                    // Check if the current SSL certificate matches the pinned certificate.
+                    if (currentWebsiteIssuedToCName.equals(pinnedSslCertificateStringArray[0]) && currentWebsiteIssuedToOName.equals(pinnedSslCertificateStringArray[1]) &&
+                        currentWebsiteIssuedToUName.equals(pinnedSslCertificateStringArray[2]) && currentWebsiteIssuedByCName.equals(pinnedSslCertificateStringArray[3]) &&
+                        currentWebsiteIssuedByOName.equals(pinnedSslCertificateStringArray[4]) && currentWebsiteIssuedByUName.equals(pinnedSslCertificateStringArray[5]) &&
+                        currentWebsiteSslStartDate.equals(pinnedSslCertificateDateArray[0]) && currentWebsiteSslEndDate.equals(pinnedSslCertificateDateArray[1])) {
+
+                        // An SSL certificate is pinned and matches the current domain certificate.  Proceed to the website without displaying an error.
+                        handler.proceed();
+                    }
+                } else {  // Either there isn't a pinned SSL certificate or it doesn't match the current website certificate.
+                    // Store the SSL error handler.
+                    nestedScrollWebView.setSslErrorHandler(handler);
 
-    private void loadBookmarksFolder() {
-        // Update the bookmarks cursor with the contents of the bookmarks database for the current folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
+                    // Instantiate an SSL certificate error alert dialog.
+                    DialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error, nestedScrollWebView.getWebViewFragmentId());
 
-        // 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);
+                    // Show the SSL certificate error dialog.
+                    sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
+                }
             }
+        });
 
-            @Override
-            public void bindView(View view, Context context, Cursor cursor) {
-                // Get handles for the views.
-                ImageView bookmarkFavoriteIcon = view.findViewById(R.id.bookmark_favorite_icon);
-                TextView bookmarkNameTextView = view.findViewById(R.id.bookmark_name);
+        // Check to see if this is the first page.
+        if (pageNumber == 0) {
+            // Set this nested scroll WebView as the current WebView.
+            currentWebView = nestedScrollWebView;
 
-                // Get the favorite icon byte array from the cursor.
-                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
+            // Apply the app settings from the shared preferences.
+            applyAppSettings();
 
-                // 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);
+            // Load the website if not waiting for Orbot to connect.
+            if (!waitingForOrbot) {
+                // Get the intent that started the app.
+                Intent launchingIntent = getIntent();
 
-                // Display the bitmap in `bookmarkFavoriteIcon`.
-                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
+                // Get the information from the intent.
+                String launchingIntentAction = launchingIntent.getAction();
+                Uri launchingIntentUriData = launchingIntent.getData();
 
-                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
-                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
-                bookmarkNameTextView.setText(bookmarkNameString);
+                // 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;
 
-                // 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);
+                    // Sanitize the search input and convert it to a search.
+                    try {
+                        encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                    } catch (UnsupportedEncodingException exception) {
+                        encodedUrlString = "";
+                    }
+
+                    // Load the completed search URL.
+                    loadUrl(searchURL + encodedUrlString);
+                } else if (launchingIntentUriData != null){  // Check to see if the intent contains a new URL.
+                    // Load the URL from the intent.
+                    loadUrl(launchingIntentUriData.toString());
+                } else {  // The is no URL in the intent.
+                    // Select the homepage based on the proxy through Orbot status.
+                    if (proxyThroughOrbot) {
+                        // Load the Tor homepage.
+                        loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
+                    } else {
+                        // Load the normal homepage.
+                        loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
+                    }
                 }
             }
-        };
-
-        // Populate the `ListView` with the adapter.
-        bookmarksListView.setAdapter(bookmarksCursorAdapter);
-
-        // Set the bookmarks drawer title.
-        if (currentBookmarksFolder.isEmpty()) {
-            bookmarksTitleTextView.setText(R.string.bookmarks);
-        } else {
-            bookmarksTitleTextView.setText(currentBookmarksFolder);
         }
     }
 }
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