]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/activities/MainWebViewActivity.java
Workaround scrolling bug in WebView >= 99.0.4844.48. https://redmine.stoutner.com...
[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
index cd7a164c44abac393c434c5720084393bdd4a4ef..3d27a4cf61d0782be71bbe673cc29dad58082b41 100644 (file)
@@ -1,27 +1,27 @@
 /*
- * Copyright © 2015-2021 Soren Stoutner <soren@stoutner.com>.
+ * Copyright © 2015-2022 Soren Stoutner <soren@stoutner.com>.
  *
  * Download cookie code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
  *
- * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
+ * This file is part of Privacy Browser Android <https://www.stoutner.com/privacy-browser-android>.
  *
- * Privacy Browser is free software: you can redistribute it and/or modify
+ * Privacy Browser Android is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
  *
- * Privacy Browser is distributed in the hope that it will be useful,
+ * Privacy Browser Android is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
+ * along with Privacy Browser Android.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 package com.stoutner.privacybrowser.activities;
 
-import android.Manifest;
+import android.animation.ObjectAnimator;
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.app.Dialog;
@@ -31,7 +31,6 @@ import android.content.ActivityNotFoundException;
 import android.content.BroadcastReceiver;
 import android.content.ClipData;
 import android.content.ClipboardManager;
-import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
@@ -50,11 +49,14 @@ import android.net.http.SslError;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.Environment;
 import android.os.Handler;
 import android.os.Message;
 import android.preference.PreferenceManager;
 import android.print.PrintDocumentAdapter;
 import android.print.PrintManager;
+import android.provider.DocumentsContract;
+import android.provider.OpenableColumns;
 import android.text.Editable;
 import android.text.Spanned;
 import android.text.TextWatcher;
@@ -77,6 +79,7 @@ import android.webkit.SslErrorHandler;
 import android.webkit.ValueCallback;
 import android.webkit.WebBackForwardList;
 import android.webkit.WebChromeClient;
+import android.webkit.WebResourceRequest;
 import android.webkit.WebResourceResponse;
 import android.webkit.WebSettings;
 import android.webkit.WebStorage;
@@ -84,6 +87,7 @@ import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.webkit.WebViewDatabase;
 import android.widget.ArrayAdapter;
+import android.widget.CheckBox;
 import android.widget.CursorAdapter;
 import android.widget.EditText;
 import android.widget.FrameLayout;
@@ -95,6 +99,9 @@ import android.widget.RadioButton;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 
+import androidx.activity.result.ActivityResultCallback;
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.ActionBarDrawerToggle;
@@ -102,13 +109,11 @@ import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import androidx.core.app.ActivityCompat;
-import androidx.core.content.ContextCompat;
-import androidx.core.content.FileProvider;
 import androidx.core.content.res.ResourcesCompat;
 import androidx.core.view.GravityCompat;
 import androidx.drawerlayout.widget.DrawerLayout;
 import androidx.fragment.app.DialogFragment;
+import androidx.fragment.app.Fragment;
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 import androidx.viewpager.widget.ViewPager;
 import androidx.webkit.WebSettingsCompat;
@@ -120,7 +125,6 @@ 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;
@@ -128,7 +132,7 @@ import com.stoutner.privacybrowser.asynctasks.PopulateBlocklists;
 import com.stoutner.privacybrowser.asynctasks.PrepareSaveDialog;
 import com.stoutner.privacybrowser.asynctasks.SaveUrl;
 import com.stoutner.privacybrowser.asynctasks.SaveWebpageImage;
-import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
+import com.stoutner.privacybrowser.dataclasses.PendingDialog;
 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
@@ -138,31 +142,35 @@ import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
 import com.stoutner.privacybrowser.dialogs.OpenDialog;
 import com.stoutner.privacybrowser.dialogs.ProxyNotInstalledDialog;
 import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog;
-import com.stoutner.privacybrowser.dialogs.SaveWebpageDialog;
+import com.stoutner.privacybrowser.dialogs.SaveDialog;
 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
-import com.stoutner.privacybrowser.dialogs.StoragePermissionDialog;
 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
 import com.stoutner.privacybrowser.dialogs.WaitingForProxyDialog;
 import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
-import com.stoutner.privacybrowser.helpers.AdHelper;
 import com.stoutner.privacybrowser.helpers.BlocklistHelper;
 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
-import com.stoutner.privacybrowser.helpers.FileNameHelper;
 import com.stoutner.privacybrowser.helpers.ProxyHelper;
 import com.stoutner.privacybrowser.views.NestedScrollWebView;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
 import java.io.UnsupportedEncodingException;
+
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLDecoder;
 import java.net.URLEncoder;
+
 import java.text.NumberFormat;
+
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.HashMap;
@@ -176,42 +184,34 @@ import java.util.concurrent.Executors;
 
 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
         EditBookmarkFolderDialog.EditBookmarkFolderListener, FontSizeDialog.UpdateFontSizeListener, NavigationView.OnNavigationItemSelectedListener, OpenDialog.OpenListener,
-        PinnedMismatchDialog.PinnedMismatchListener, PopulateBlocklists.PopulateBlocklistsListener, SaveWebpageDialog.SaveWebpageListener, StoragePermissionDialog.StoragePermissionDialogListener,
-        UrlHistoryDialog.NavigateHistoryListener, WebViewTabFragment.NewTabListener {
+        PinnedMismatchDialog.PinnedMismatchListener, PopulateBlocklists.PopulateBlocklistsListener, SaveDialog.SaveListener, UrlHistoryDialog.NavigateHistoryListener,
+        WebViewTabFragment.NewTabListener {
 
-    // The executor service handles background tasks.  It is accessed from `ViewSourceActivity`.
+    // Define the public static variables.
     public static ExecutorService executorService = Executors.newFixedThreadPool(4);
-
-    // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxy()`.
     public static String orbotStatus = "unknown";
+    public static ArrayList<PendingDialog> pendingDialogsArrayList =  new ArrayList<>();
+    public static String proxyMode = ProxyHelper.NONE;
 
-    // The WebView pager adapter is accessed from `HttpAuthenticationDialog`, `PinnedMismatchDialog`, and `SslCertificateErrorDialog`.  It is also used in `onCreate()`, `onResume()`, and `addTab()`.
-    public static WebViewPagerAdapter webViewPagerAdapter;
-
-    // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
+    // Declare the public static variables.
+    public static String currentBookmarksFolder;
     public static boolean restartFromBookmarksActivity;
+    public static WebViewPagerAdapter webViewPagerAdapter;
 
-    // `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;
+    // Declare the public static views.
+    public static AppBarLayout appBarLayout;
 
     // The user agent constants are public static so they can be accessed from `SettingsFragment`, `DomainsActivity`, and `DomainSettingsFragment`.
     public final static int UNRECOGNIZED_USER_AGENT = -1;
     public final static int SETTINGS_WEBVIEW_DEFAULT_USER_AGENT = 1;
-    public final static int SETTINGS_CUSTOM_USER_AGENT = 12;
+    public final static int SETTINGS_CUSTOM_USER_AGENT = 11;
     public final static int DOMAINS_SYSTEM_DEFAULT_USER_AGENT = 0;
     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
-    public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
+    public final static int DOMAINS_CUSTOM_USER_AGENT = 12;
 
-    // Start activity for result request codes.  The public static entries are accessed from `OpenDialog()` and `SaveWebpageDialog()`.
-    public final static int BROWSE_OPEN_REQUEST_CODE = 0;
-    public final static int BROWSE_SAVE_WEBPAGE_REQUEST_CODE = 1;
-    private final int BROWSE_FILE_UPLOAD_REQUEST_CODE = 2;
-
-    // The proxy mode is public static so it can be accessed from `ProxyHelper()`.
-    // It is also used in `onRestart()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxy()`.
-    // It will be updated in `applyAppSettings()`, but it needs to be initialized here or the first run of `onPrepareOptionsMenu()` crashes.
-    public static String proxyMode = ProxyHelper.NONE;
+    // Define the start activity for result request codes.  The public static entry is accessed from `OpenDialog()`.
+    private final int BROWSE_FILE_UPLOAD_REQUEST_CODE = 0;
+    public final static int BROWSE_OPEN_REQUEST_CODE = 1;
 
     // Define the saved instance state constants.
     private final String SAVED_STATE_ARRAY_LIST = "saved_state_array_list";
@@ -247,40 +247,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     private ArrayList<List<String[]>> ultraList;
     private ArrayList<List<String[]>> ultraPrivacy;
 
-    // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
-    private String webViewDefaultUserAgent;
-
-    // The incognito mode is set in `applyAppSettings()` and used in `initializeWebView()`.
-    private boolean incognitoModeEnabled;
-
-    // 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;
-
-    // The app bar trackers are set in `applyAppSettings()` and used in `initializeWebView()`.
-    private boolean hideAppBar;
-    private boolean scrollAppBar;
-
-    // The loading new intent tracker is set in `onNewIntent()` and used in `setCurrentWebView()`.
-    private boolean loadingNewIntent;
-
-    // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
-    private boolean reapplyDomainSettingsOnRestart;
-
-    // `reapplyAppSettingsOnRestart` is used in `onNavigationItemSelected()` and `onRestart()`.
-    private boolean reapplyAppSettingsOnRestart;
-
-    // `displayingFullScreenVideo` is used in `onCreate()` and `onResume()`.
-    private boolean displayingFullScreenVideo;
-
-    // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
-    private BroadcastReceiver orbotStatusBroadcastReceiver;
-
-    // The waiting for proxy boolean is used in `onResume()`, `initializeApp()` and `applyProxy()`.
-    private boolean waitingForProxy = false;
-
     // The action bar drawer toggle is initialized in `onCreate()` and used in `onResume()`.
     private ActionBarDrawerToggle actionBarDrawerToggle;
 
@@ -289,10 +255,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     private ForegroundColorSpan initialGrayColorSpan;
     private ForegroundColorSpan finalGrayColorSpan;
 
-    // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
-    // and `loadBookmarksFolder()`.
-    private BookmarksDatabaseHelper bookmarksDatabaseHelper;
-
     // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
     private Cursor bookmarksCursor;
 
@@ -315,16 +277,32 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     private boolean sanitizeFacebookClickIds;
     private boolean sanitizeTwitterAmpRedirects;
 
-    // The file path strings are used in `onSaveWebpage()` and `onRequestPermissionResult()`
-    private String openFilePath;
-    private String saveWebpageUrl;
-    private String saveWebpageFilePath;
+    // Declare the class variables
+    private BookmarksDatabaseHelper bookmarksDatabaseHelper;
+    private boolean bottomAppBar;
+    private boolean displayingFullScreenVideo;
+    private boolean downloadWithExternalApp;
+    private boolean fullScreenBrowsingModeEnabled;
+    private boolean hideAppBar;
+    private boolean incognitoModeEnabled;
+    private boolean inFullScreenBrowsingMode;
+    private boolean loadingNewIntent;
+    private BroadcastReceiver orbotStatusBroadcastReceiver;
+    private ProxyHelper proxyHelper;
+    private boolean reapplyAppSettingsOnRestart;
+    private boolean reapplyDomainSettingsOnRestart;
+    private boolean scrollAppBar;
+    private boolean waitingForProxy;
+    private String webViewDefaultUserAgent;
+
+    // Define the class variables.
+    private ObjectAnimator objectAnimator = new ObjectAnimator();
+    private String saveUrlString = "";
 
     // Declare the class views.
     private FrameLayout rootFrameLayout;
     private DrawerLayout drawerLayout;
-    private RelativeLayout mainContentRelativeLayout;
-    private AppBarLayout appBarLayout;
+    private CoordinatorLayout coordinatorLayout;
     private Toolbar toolbar;
     private RelativeLayout urlRelativeLayout;
     private EditText urlEditText;
@@ -346,8 +324,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     private MenuItem navigationRequestsMenuItem;
     private MenuItem optionsPrivacyMenuItem;
     private MenuItem optionsRefreshMenuItem;
-    private MenuItem optionsFirstPartyCookiesMenuItem;
-    private MenuItem optionsThirdPartyCookiesMenuItem;
+    private MenuItem optionsCookiesMenuItem;
     private MenuItem optionsDomStorageMenuItem;
     private MenuItem optionsSaveFormDataMenuItem;
     private MenuItem optionsClearDataMenuItem;
@@ -388,13 +365,124 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     private MenuItem optionsFontSizeMenuItem;
     private MenuItem optionsAddOrEditDomainMenuItem;
 
-    @Override
-    // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
+    // This variable won't be needed once the class is migrated to Kotlin, as can be seen in LogcatActivity or AboutVersionFragment.
+    private Activity resultLauncherActivityHandle;
+
+    // Define the save URL activity result launcher.  It must be defined before `onCreate()` is run or the app will crash.
+    private final ActivityResultLauncher<String> saveUrlActivityResultLauncher = registerForActivityResult(new ActivityResultContracts.CreateDocument(),
+            new ActivityResultCallback<Uri>() {
+                @Override
+                public void onActivityResult(Uri fileUri) {
+                    // Only save the URL if the file URI is not null, which happens if the user exited the file picker by pressing back.
+                    if (fileUri != null) {
+                        new SaveUrl(getApplicationContext(), resultLauncherActivityHandle, fileUri, currentWebView.getSettings().getUserAgentString(), currentWebView.getAcceptCookies()).execute(saveUrlString);
+                    }
+
+                    // Reset the save URL string.
+                    saveUrlString = "";
+                }
+            });
+
+    // Define the save webpage archive activity result launcher.  It must be defined before `onCreate()` is run or the app will crash.
+    private final ActivityResultLauncher<String> saveWebpageArchiveActivityResultLauncher = registerForActivityResult(new ActivityResultContracts.CreateDocument(),
+            new ActivityResultCallback<Uri>() {
+                @Override
+                public void onActivityResult(Uri fileUri) {
+                    // Only save the webpage archive if the file URI is not null, which happens if the user exited the file picker by pressing back.
+                    if (fileUri != null) {
+                        try {
+                            // Create a temporary MHT file.
+                            File temporaryMhtFile = File.createTempFile("temporary_mht_file", ".mht", getCacheDir());
+
+                            // Save the temporary MHT file.
+                            currentWebView.saveWebArchive(temporaryMhtFile.toString(), false, callbackValue -> {
+                                if (callbackValue != null) {  // The temporary MHT file was saved successfully.
+                                    try {
+                                        // Create a temporary MHT file input stream.
+                                        FileInputStream temporaryMhtFileInputStream = new FileInputStream(temporaryMhtFile);
+
+                                        // Get an output stream for the save webpage file path.
+                                        OutputStream mhtOutputStream = getContentResolver().openOutputStream(fileUri);
+
+                                        // Create a transfer byte array.
+                                        byte[] transferByteArray = new byte[1024];
+
+                                        // Create an integer to track the number of bytes read.
+                                        int bytesRead;
+
+                                        // Copy the temporary MHT file input stream to the MHT output stream.
+                                        while ((bytesRead = temporaryMhtFileInputStream.read(transferByteArray)) > 0) {
+                                            mhtOutputStream.write(transferByteArray, 0, bytesRead);
+                                        }
+
+                                        // Close the streams.
+                                        mhtOutputStream.close();
+                                        temporaryMhtFileInputStream.close();
+
+                                        // Initialize the file name string from the file URI last path segment.
+                                        String fileNameString = fileUri.getLastPathSegment();
+
+                                        // Query the exact file name if the API >= 26.
+                                        if (Build.VERSION.SDK_INT >= 26) {
+                                            // Get a cursor from the content resolver.
+                                            Cursor contentResolverCursor = resultLauncherActivityHandle.getContentResolver().query(fileUri, null, null, null);
+
+                                            // Move to the fist row.
+                                            contentResolverCursor.moveToFirst();
+
+                                            // Get the file name from the cursor.
+                                            fileNameString = contentResolverCursor.getString(contentResolverCursor.getColumnIndexOrThrow(OpenableColumns.DISPLAY_NAME));
+
+                                            // Close the cursor.
+                                            contentResolverCursor.close();
+                                        }
+
+                                        // Display a snackbar.
+                                        Snackbar.make(currentWebView, getString(R.string.file_saved) + "  " + fileNameString, Snackbar.LENGTH_SHORT).show();
+                                    } catch (Exception exception) {
+                                        // Display a snackbar with the exception.
+                                        Snackbar.make(currentWebView, getString(R.string.error_saving_file) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
+                                    } finally {
+                                        // Delete the temporary MHT file.
+                                        //noinspection ResultOfMethodCallIgnored
+                                        temporaryMhtFile.delete();
+                                    }
+                                } else {  // There was an unspecified error while saving the temporary MHT file.
+                                    // Display an error snackbar.
+                                    Snackbar.make(currentWebView, getString(R.string.error_saving_file), Snackbar.LENGTH_INDEFINITE).show();
+                                }
+                            });
+                        } catch (IOException ioException) {
+                            // Display a snackbar with the IO exception.
+                            Snackbar.make(currentWebView, getString(R.string.error_saving_file) + "  " + ioException, Snackbar.LENGTH_INDEFINITE).show();
+                        }
+                    }
+                }
+            });
+
+    // Define the save webpage image activity result launcher.  It must be defined before `onCreate()` is run or the app will crash.
+    private final ActivityResultLauncher<String> saveWebpageImageActivityResultLauncher = registerForActivityResult(new ActivityResultContracts.CreateDocument(),
+            new ActivityResultCallback<Uri>() {
+                @Override
+                public void onActivityResult(Uri fileUri) {
+                    // Only save the webpage image if the file URI is not null, which happens if the user exited the file picker by pressing back.
+                    if (fileUri != null) {
+                        // Save the webpage image.
+                        new SaveWebpageImage(resultLauncherActivityHandle, fileUri, currentWebView).execute();
+                    }
+                }
+            });
+
+    // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with WebView.
     @SuppressLint("ClickableViewAccessibility")
+    @Override
     protected void onCreate(Bundle savedInstanceState) {
         // Run the default commands.
         super.onCreate(savedInstanceState);
 
+        // Populate the result launcher activity.  This will no longer be needed once the activity has transitioned to Kotlin.
+        resultLauncherActivityHandle = this;
+
         // Check to see if the activity has been restarted.
         if (savedInstanceState != null) {
             // Store the saved instance state variables.
@@ -410,9 +498,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Get a handle for the shared preferences.
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // Get the screenshot preference.
+        // Get the preferences.
         String appTheme = sharedPreferences.getString("app_theme", getString(R.string.app_theme_default_value));
         boolean allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false);
+        bottomAppBar = sharedPreferences.getBoolean(getString(R.string.bottom_app_bar_key), false);
 
         // Get the theme entry values string array.
         String[] appThemeEntryValuesStringArray = getResources().getStringArray(R.array.app_theme_entry_values);
@@ -440,20 +529,22 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         }
 
         // Enable the drawing of the entire webpage.  This makes it possible to save a website image.  This must be done before anything else happens with the WebView.
-        if (Build.VERSION.SDK_INT >= 21) {
-            WebView.enableSlowWholeDocumentDraw();
-        }
+        //WebView.enableSlowWholeDocumentDraw();    Temporarily disabled due to <https://redmine.stoutner.com/issues/811>.
 
         // Set the theme.
         setTheme(R.style.PrivacyBrowser);
 
         // Set the content view.
-        setContentView(R.layout.main_framelayout);
+        if (bottomAppBar) {
+            setContentView(R.layout.main_framelayout_bottom_appbar);
+        } else {
+            setContentView(R.layout.main_framelayout_top_appbar);
+        }
 
         // Get handles for the views.
         rootFrameLayout = findViewById(R.id.root_framelayout);
         drawerLayout = findViewById(R.id.drawerlayout);
-        mainContentRelativeLayout = findViewById(R.id.main_content_relativelayout);
+        coordinatorLayout = findViewById(R.id.coordinatorlayout);
         appBarLayout = findViewById(R.id.appbar_layout);
         toolbar = findViewById(R.id.toolbar);
         findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
@@ -461,10 +552,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         tabLayout = findViewById(R.id.tablayout);
         swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
         webViewPager = findViewById(R.id.webviewpager);
-        fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
-
-        // Get a handle for the navigation view.
         NavigationView navigationView = findViewById(R.id.navigationview);
+        fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
 
         // Get a handle for the navigation menu.
         Menu navigationMenu = navigationView.getMenu();
@@ -513,6 +602,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Store up to 100 tabs in memory.
         webViewPager.setOffscreenPageLimit(100);
 
+        // Instantiate the proxy helper.
+        proxyHelper = new ProxyHelper();
+
         // Initialize the app.
         initializeApp();
 
@@ -543,6 +635,15 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             // Only process the URI if it contains data or it is a web search.  If the user pressed the desktop icon after the app was already running the URI will be null.
             if (intentUriData != null || intentStringExtra != null || isWebSearch) {
+                // Exit the full screen video if it is displayed.
+                if (displayingFullScreenVideo) {
+                    // Exit full screen video mode.
+                    exitFullScreenVideo();
+
+                    // Reload the current WebView.  Otherwise, it can display entirely black.
+                    currentWebView.reload();
+                }
+
                 // Get the shared preferences.
                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
@@ -629,7 +730,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
                     // Reset the current domain name so the domain settings will be reapplied.
-                    nestedScrollWebView.resetCurrentDomainName();
+                    nestedScrollWebView.setCurrentDomainName("");
 
                     // Reapply the domain settings if the URL is not null, which can happen if an empty tab is active when returning from settings.
                     if (nestedScrollWebView.getUrl() != null) {
@@ -689,7 +790,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             applyProxy(false);
         }
 
-        // Reapply any system UI flags and the ad in the free flavor.
+        // Reapply any system UI flags.
         if (displayingFullScreenVideo || inFullScreenBrowsingMode) {  // The system is displaying a website or a video in full screen mode.
             /* Hide the system bars.
              * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
@@ -699,13 +800,19 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
              */
             rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
                     View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-        } else if (BuildConfig.FLAVOR.contentEquals("free")) {  // The system in not in full screen mode.
-            // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-            View adView = findViewById(R.id.adview);
+        }
 
-            // Resume the ad.
-            AdHelper.resumeAd(adView);
+        // Show any pending dialogs.
+        for (int i = 0; i < pendingDialogsArrayList.size(); i++) {
+            // Get the pending dialog from the array list.
+            PendingDialog pendingDialog = pendingDialogsArrayList.get(i);
+
+            // Show the pending dialog.
+            pendingDialog.dialogFragment.show(getSupportFragmentManager(), pendingDialog.tag);
         }
+
+        // Clear the pending dialogs array list.
+        pendingDialogsArrayList.clear();
     }
 
     // `onStop()` runs after `onPause()`.  It is used instead of `onPause()` so the commands are not called every time the screen is partially hidden.
@@ -735,15 +842,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         if (currentWebView != null) {
             currentWebView.pauseTimers();
         }
-
-        // Pause the ad or it will continue to consume resources in the background on the free flavor.
-        if (BuildConfig.FLAVOR.contentEquals("free")) {
-            // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-            View adView = findViewById(R.id.adview);
-
-            // Pause the ad.
-            AdHelper.pauseAd(adView);
-        }
     }
 
     @Override
@@ -824,11 +922,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
         optionsMenu = menu;
 
-        // Get handles for the class menu items.
+        // Get handles for the menu items.
         optionsPrivacyMenuItem = menu.findItem(R.id.javascript);
         optionsRefreshMenuItem = menu.findItem(R.id.refresh);
-        optionsFirstPartyCookiesMenuItem = menu.findItem(R.id.first_party_cookies);
-        optionsThirdPartyCookiesMenuItem = menu.findItem(R.id.third_party_cookies);
+        MenuItem bookmarksMenuItem = menu.findItem(R.id.bookmarks);
+        optionsCookiesMenuItem = menu.findItem(R.id.cookies);
         optionsDomStorageMenuItem = menu.findItem(R.id.dom_storage);
         optionsSaveFormDataMenuItem = menu.findItem(R.id.save_form_data);  // Form data can be removed once the minimum API >= 26.
         optionsClearDataMenuItem = menu.findItem(R.id.clear_data);
@@ -869,16 +967,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         optionsFontSizeMenuItem = menu.findItem(R.id.font_size);
         optionsAddOrEditDomainMenuItem = menu.findItem(R.id.add_or_edit_domain);
 
-        // Get handles for the method menu items.
-        MenuItem bookmarksMenuItem = menu.findItem(R.id.bookmarks);
-        MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
-
         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
         updatePrivacyIcons(false);
 
-        // Only display third-party cookies if API >= 21
-        optionsThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
-
         // Only display the form data menu items if the API < 26.
         optionsSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
         optionsClearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
@@ -886,12 +977,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Disable the clear form data menu item if the API >= 26 so that the status of the main Clear Data is calculated correctly.
         optionsClearFormDataMenuItem.setEnabled(Build.VERSION.SDK_INT < 26);
 
-        // Only display the dark WebView menu item if API >= 21.
-        optionsDarkWebViewMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
-
-        // Only show Ad Consent if this is the free flavor.
-        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
-
         // Get the shared preferences.
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
@@ -902,11 +987,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         if (displayAdditionalAppBarIcons) {
             optionsRefreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
             bookmarksMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
-            optionsFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+            optionsCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
         } else { //Do not display the additional icons.
             optionsRefreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
             bookmarksMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
-            optionsFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+            optionsCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
         }
 
         // Replace Refresh with Stop if a URL is already loading.
@@ -914,17 +999,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Set the title.
             optionsRefreshMenuItem.setTitle(R.string.stop);
 
-            // Set the icon if it is displayed in the app bar.
+            // Set the icon if it is displayed in the app bar.  Once the minimum API is >= 26, the blue and black icons can be combined with a tint list.
             if (displayAdditionalAppBarIcons) {
-                // Get the current theme status.
-                int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
-
-                // Set the icon according to the current theme status.
-                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
-                    optionsRefreshMenuItem.setIcon(R.drawable.close_blue_day);
-                } else {
-                    optionsRefreshMenuItem.setIcon(R.drawable.close_blue_night);
-                }
+                optionsRefreshMenuItem.setIcon(R.drawable.close_blue);
             }
         }
 
@@ -959,13 +1036,13 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Set the status of the menu item checkboxes.
             optionsDomStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
             optionsSaveFormDataMenuItem.setChecked(currentWebView.getSettings().getSaveFormData());  // Form data can be removed once the minimum API >= 26.
-            optionsEasyListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
-            optionsEasyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
-            optionsFanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
-            optionsFanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
-            optionsUltraListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
-            optionsUltraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
-            optionsBlockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+            optionsEasyListMenuItem.setChecked(currentWebView.getEasyListEnabled());
+            optionsEasyPrivacyMenuItem.setChecked(currentWebView.getEasyPrivacyEnabled());
+            optionsFanboysAnnoyanceListMenuItem.setChecked(currentWebView.getFanboysAnnoyanceListEnabled());
+            optionsFanboysSocialBlockingListMenuItem.setChecked(currentWebView.getFanboysSocialBlockingListEnabled());
+            optionsUltraListMenuItem.setChecked(currentWebView.getUltraListEnabled());
+            optionsUltraPrivacyMenuItem.setChecked(currentWebView.getUltraPrivacyEnabled());
+            optionsBlockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.getBlockAllThirdPartyRequests());
             optionsSwipeToRefreshMenuItem.setChecked(currentWebView.getSwipeToRefresh());
             optionsWideViewportMenuItem.setChecked(currentWebView.getSettings().getUseWideViewPort());
             optionsDisplayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
@@ -980,15 +1057,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             optionsUltraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRAPRIVACY) + " - " + getString(R.string.ultraprivacy));
             optionsBlockAllThirdPartyRequestsMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " + getString(R.string.block_all_third_party_requests));
 
-            // Only modify third-party cookies if the API >= 21.
-            if (Build.VERSION.SDK_INT >= 21) {
-                // Set the status of the third-party cookies checkbox.
-                optionsThirdPartyCookiesMenuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
-
-                // Enable third-party cookies if first-party cookies are enabled.
-                optionsThirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
-            }
-
             // Enable DOM Storage if JavaScript is enabled.
             optionsDomStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
 
@@ -998,8 +1066,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             }
         }
 
-        // Set the checked status of the first party cookies menu item.
-        optionsFirstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
+        // Set the cookies menu item checked status.
+        optionsCookiesMenuItem.setChecked(cookieManager.acceptCookie());
 
         // Enable Clear Cookies if there are any.
         optionsClearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
@@ -1218,12 +1286,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             // Consume the event.
             return true;
-        } else if (menuItemId == R.id.first_party_cookies) {  // First-party cookies.
+        } else if (menuItemId == R.id.cookies) {  // Cookies.
             // Switch the first-party cookie status.
             cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
 
-            // Store the first-party cookie status.
-            currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
+            // Store the cookie status.
+            currentWebView.setAcceptCookies(cookieManager.acceptCookie());
 
             // Update the menu checkbox.
             menuItem.setChecked(cookieManager.acceptCookie());
@@ -1232,10 +1300,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             updatePrivacyIcons(true);
 
             // Display a snackbar.
-            if (cookieManager.acceptCookie()) {  // First-party cookies are enabled.
-                Snackbar.make(webViewPager, R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
+            if (cookieManager.acceptCookie()) {  // Cookies are enabled.
+                Snackbar.make(webViewPager, R.string.cookies_enabled, Snackbar.LENGTH_SHORT).show();
             } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is still enabled.
-                Snackbar.make(webViewPager, R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
+                Snackbar.make(webViewPager, R.string.cookies_disabled, Snackbar.LENGTH_SHORT).show();
             } else {  // Privacy mode.
                 Snackbar.make(webViewPager, R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
             }
@@ -1243,28 +1311,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Reload the current WebView.
             currentWebView.reload();
 
-            // Consume the event.
-            return true;
-        } else if (menuItemId == R.id.third_party_cookies) {  // Third-party cookies.
-            // Only act if the API >= 21.  Otherwise, there are no third-party cookie controls.
-            if (Build.VERSION.SDK_INT >= 21) {
-                // Toggle the status of thirdPartyCookiesEnabled.
-                cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
-
-                // Update the menu checkbox.
-                menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
-
-                // Display a snackbar.
-                if (cookieManager.acceptThirdPartyCookies(currentWebView)) {
-                    Snackbar.make(webViewPager, R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
-                } else {
-                    Snackbar.make(webViewPager, R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
-                }
-
-                // Reload the current WebView.
-                currentWebView.reload();
-            }
-
             // Consume the event.
             return true;
         } else if (menuItemId == R.id.dom_storage) {  // DOM storage.
@@ -1321,12 +1367,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         @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);
-                                }
+                                // Delete the cookies.
+                                cookieManager.removeAllCookies(null);
                             }
                         }
                     })
@@ -1414,10 +1456,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             return true;
         } else if (menuItemId == R.id.easylist) {  // EasyList.
             // Toggle the EasyList status.
-            currentWebView.enableBlocklist(NestedScrollWebView.EASYLIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
+            currentWebView.setEasyListEnabled(!currentWebView.getEasyListEnabled());
 
             // Update the menu checkbox.
-            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
+            menuItem.setChecked(currentWebView.getEasyListEnabled());
 
             // Reload the current WebView.
             currentWebView.reload();
@@ -1426,10 +1468,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             return true;
         } else if (menuItemId == R.id.easyprivacy) {  // EasyPrivacy.
             // Toggle the EasyPrivacy status.
-            currentWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
+            currentWebView.setEasyPrivacyEnabled(!currentWebView.getEasyPrivacyEnabled());
 
             // Update the menu checkbox.
-            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
+            menuItem.setChecked(currentWebView.getEasyPrivacyEnabled());
 
             // Reload the current WebView.
             currentWebView.reload();
@@ -1438,13 +1480,13 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             return true;
         } else if (menuItemId == R.id.fanboys_annoyance_list) {  // Fanboy's Annoyance List.
             // Toggle Fanboy's Annoyance List status.
-            currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+            currentWebView.setFanboysAnnoyanceListEnabled(!currentWebView.getFanboysAnnoyanceListEnabled());
 
             // Update the menu checkbox.
-            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+            menuItem.setChecked(currentWebView.getFanboysAnnoyanceListEnabled());
 
-            // Update the staus of Fanboy's Social Blocking List.
-            optionsFanboysSocialBlockingListMenuItem.setEnabled(!currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+            // Update the status of Fanboy's Social Blocking List.
+            optionsFanboysSocialBlockingListMenuItem.setEnabled(!currentWebView.getFanboysAnnoyanceListEnabled());
 
             // Reload the current WebView.
             currentWebView.reload();
@@ -1453,10 +1495,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             return true;
         } else if (menuItemId == R.id.fanboys_social_blocking_list) {  // Fanboy's Social Blocking List.
             // Toggle Fanboy's Social Blocking List status.
-            currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+            currentWebView.setFanboysSocialBlockingListEnabled(!currentWebView.getFanboysSocialBlockingListEnabled());
 
             // Update the menu checkbox.
-            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+            menuItem.setChecked(currentWebView.getFanboysSocialBlockingListEnabled());
 
             // Reload the current WebView.
             currentWebView.reload();
@@ -1465,10 +1507,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             return true;
         } else if (menuItemId == R.id.ultralist) {  // UltraList.
             // Toggle the UltraList status.
-            currentWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
+            currentWebView.setUltraListEnabled(!currentWebView.getUltraListEnabled());
 
             // Update the menu checkbox.
-            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
+            menuItem.setChecked(currentWebView.getUltraListEnabled());
 
             // Reload the current WebView.
             currentWebView.reload();
@@ -1477,10 +1519,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             return true;
         } else if (menuItemId == R.id.ultraprivacy) {  // UltraPrivacy.
             // Toggle the UltraPrivacy status.
-            currentWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
+            currentWebView.setUltraPrivacyEnabled(!currentWebView.getUltraPrivacyEnabled());
 
             // Update the menu checkbox.
-            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
+            menuItem.setChecked(currentWebView.getUltraPrivacyEnabled());
 
             // Reload the current WebView.
             currentWebView.reload();
@@ -1489,10 +1531,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             return true;
         } else if (menuItemId == R.id.block_all_third_party_requests) {  // Block all third-party requests.
             //Toggle the third-party requests blocker status.
-            currentWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, !currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+            currentWebView.setBlockAllThirdPartyRequests(!currentWebView.getBlockAllThirdPartyRequests());
 
             // Update the menu checkbox.
-            menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+            menuItem.setChecked(currentWebView.getBlockAllThirdPartyRequests());
 
             // Reload the current WebView.
             currentWebView.reload();
@@ -1753,7 +1795,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             assert printManager != null;
 
             // Create a print document adapter from the current WebView.
-            PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
+            PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter(getString(R.string.print));
 
             // Print the document.
             printManager.print(getString(R.string.privacy_browser_webpage), printDocumentAdapter, null);
@@ -1761,29 +1803,26 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Consume the event.
             return true;
         } else if (menuItemId == R.id.save_url) {  // Save URL.
-            // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
-            new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
-                    currentWebView.getAcceptFirstPartyCookies()).execute(currentWebView.getCurrentUrl());
+            // Check the download preference.
+            if (downloadWithExternalApp) {  // Download with an external app.
+                downloadUrlWithExternalApp(currentWebView.getCurrentUrl());
+            } else {  // Handle the download inside of Privacy Browser.
+                // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
+                new PrepareSaveDialog(this, this, getSupportFragmentManager(), currentWebView.getSettings().getUserAgentString(),
+                        currentWebView.getAcceptCookies()).execute(currentWebView.getCurrentUrl());
+            }
 
             // Consume the event.
             return true;
-        } else if (menuItemId == R.id.save_archive) {  // Save archive.
-            // Instantiate the save dialog.
-            DialogFragment saveArchiveFragment = SaveWebpageDialog.saveWebpage(StoragePermissionDialog.SAVE_ARCHIVE, null, null, getString(R.string.webpage_mht), null,
-                    false);
-
-            // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
-            saveArchiveFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
+        } else if (menuItemId == R.id.save_archive) {
+            // Open the file picker with a default file name built from the current domain name.
+            saveWebpageArchiveActivityResultLauncher.launch(currentWebView.getCurrentDomainName() + ".mht");
 
             // Consume the event.
             return true;
         } else if (menuItemId == R.id.save_image) {  // Save image.
-            // Instantiate the save dialog.
-            DialogFragment saveImageFragment = SaveWebpageDialog.saveWebpage(StoragePermissionDialog.SAVE_IMAGE, null, null, getString(R.string.webpage_png), null,
-                    false);
-
-            // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
-            saveImageFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
+            // Open the file picker with a default file name built from the current domain name.
+            saveWebpageImageActivityResultLauncher.launch(currentWebView.getCurrentDomainName() + ".png");
 
             // Consume the event.
             return true;
@@ -1856,6 +1895,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 domainsIntent.putExtra("load_domain", currentWebView.getDomainSettingsDatabaseId());
                 domainsIntent.putExtra("close_on_back", true);
                 domainsIntent.putExtra("current_url", currentWebView.getUrl());
+                domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
 
                 // Get the current certificate.
                 SslCertificate sslCertificate = currentWebView.getCertificate();
@@ -1883,12 +1923,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     domainsIntent.putExtra("ssl_end_date", endDateLong);
                 }
 
-                // Check to see if the current IP addresses have been received.
-                if (currentWebView.hasCurrentIpAddresses()) {
-                    // Add the current IP addresses to the intent.
-                    domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
-                }
-
                 // Make it so.
                 startActivity(domainsIntent);
             } else {  // Add a new domain.
@@ -1912,6 +1946,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 domainsIntent.putExtra("load_domain", newDomainDatabaseId);
                 domainsIntent.putExtra("close_on_back", true);
                 domainsIntent.putExtra("current_url", currentWebView.getUrl());
+                domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
 
                 // Get the current certificate.
                 SslCertificate sslCertificate = currentWebView.getCertificate();
@@ -1939,25 +1974,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     domainsIntent.putExtra("ssl_end_date", endDateLong);
                 }
 
-                // Check to see if the current IP addresses have been received.
-                if (currentWebView.hasCurrentIpAddresses()) {
-                    // Add the current IP addresses to the intent.
-                    domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
-                }
-
                 // Make it so.
                 startActivity(domainsIntent);
             }
 
-            // Consume the event.
-            return true;
-        } else if (menuItemId == R.id.ad_consent) {  // Ad consent.
-            // Instantiate the ad consent dialog.
-            DialogFragment adConsentDialogFragment = new AdConsentDialog();
-
-            // Display the ad consent dialog.
-            adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
-
             // Consume the event.
             return true;
         } else {  // There is no match with the options menu.  Pass the event up to the parent method.
@@ -2032,19 +2052,55 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             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));
+            requestsIntent.putExtra("block_all_third_party_requests", currentWebView.getBlockAllThirdPartyRequests());
 
             // Make it so.
             startActivity(requestsIntent);
         } else if (menuItemId == R.id.downloads) {  // Downloads.
-            // Launch the system Download Manager.
-            Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+            // Try the default system download manager.
+            try {
+                // Launch the default system Download Manager.
+                Intent defaultDownloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
 
-            // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
-            downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                // Launch as a new task so that the download manager and Privacy Browser show as separate windows in the recent tasks list.
+                defaultDownloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-            // Make it so.
-            startActivity(downloadManagerIntent);
+                // Make it so.
+                startActivity(defaultDownloadManagerIntent);
+            } catch (Exception defaultDownloadManagerException) {
+                // Try a generic file manager.
+                try {
+                    // Create a generic file manager intent.
+                    Intent genericFileManagerIntent = new Intent(Intent.ACTION_VIEW);
+
+                    // Open the download directory.
+                    genericFileManagerIntent.setDataAndType(Uri.parse(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString()), DocumentsContract.Document.MIME_TYPE_DIR);
+
+                    // Launch as a new task so that the file manager and Privacy Browser show as separate windows in the recent tasks list.
+                    genericFileManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+                    // Make it so.
+                    startActivity(genericFileManagerIntent);
+                } catch (Exception genericFileManagerException) {
+                    // Try an alternate file manager.
+                    try {
+                        // Create an alternate file manager intent.
+                        Intent alternateFileManagerIntent = new Intent(Intent.ACTION_VIEW);
+
+                        // Open the download directory.
+                        alternateFileManagerIntent.setDataAndType(Uri.parse(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString()), "resource/folder");
+
+                        // Launch as a new task so that the file manager and Privacy Browser show as separate windows in the recent tasks list.
+                        alternateFileManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+                        // Open the alternate file manager.
+                        startActivity(alternateFileManagerIntent);
+                    } catch (Exception alternateFileManagerException) {
+                        // Display a snackbar.
+                        Snackbar.make(currentWebView, R.string.no_file_manager_detected, Snackbar.LENGTH_INDEFINITE).show();
+                    }
+                }
+            }
         } else if (menuItemId == R.id.domains) {  // Domains.
             // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
             reapplyDomainSettingsOnRestart = true;
@@ -2054,6 +2110,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             // Add the extra information to the intent.
             domainsIntent.putExtra("current_url", currentWebView.getUrl());
+            domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
 
             // Get the current certificate.
             SslCertificate sslCertificate = currentWebView.getCertificate();
@@ -2081,12 +2138,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 domainsIntent.putExtra("ssl_end_date", endDateLong);
             }
 
-            // Check to see if the current IP addresses have been received.
-            if (currentWebView.hasCurrentIpAddresses()) {
-                // Add the current IP addresses to the intent.
-                domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
-            }
-
             // Make it so.
             startActivity(domainsIntent);
         } else if (menuItemId == R.id.settings) {  // Settings.
@@ -2126,7 +2177,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     ultraList.get(0).get(0)[0], ultraPrivacy.get(0).get(0)[0]};
 
             // Add the blocklist versions to the intent.
-            aboutIntent.putExtra("blocklist_versions", blocklistVersions);
+            aboutIntent.putExtra(AboutActivity.BLOCKLIST_VERSIONS, blocklistVersions);
 
             // Make it so.
             startActivity(aboutIntent);
@@ -2146,26 +2197,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         actionBarDrawerToggle.syncState();
     }
 
-    @Override
-    public void onConfigurationChanged(@NonNull Configuration newConfig) {
-        // Run the default commands.
-        super.onConfigurationChanged(newConfig);
-
-        // Reload the ad for the free flavor if not in full screen mode.
-        if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
-            // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-            View adView = findViewById(R.id.adview);
-
-            // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-            // `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
-            AdHelper.loadAd(adView, getApplicationContext(), this, getString(R.string.ad_unit_id));
-        }
-
-        // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
-        // https://code.google.com/p/android/issues/detail?id=20493#c8
-        // ActivityCompat.invalidateOptionsMenu(this);
-    }
-
     @Override
     public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
         // Get the hit test result.
@@ -2239,9 +2270,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Add a Save URL entry.
                 menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
-                    new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
-                            currentWebView.getAcceptFirstPartyCookies()).execute(linkUrl);
+                    // Check the download preference.
+                    if (downloadWithExternalApp) {  // Download with an external app.
+                        downloadUrlWithExternalApp(linkUrl);
+                    } else {  // Handle the download inside of Privacy Browser.
+                        // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
+                        new PrepareSaveDialog(this, this, getSupportFragmentManager(), currentWebView.getSettings().getUserAgentString(),
+                                currentWebView.getAcceptCookies()).execute(linkUrl);
+                    }
 
                     // Consume the event.
                     return true;
@@ -2306,9 +2342,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Add a Save Image entry.
                 menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
-                   // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
-                    new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
-                            currentWebView.getAcceptFirstPartyCookies()).execute(imageUrl);
+                    // Check the download preference.
+                    if (downloadWithExternalApp) {  // Download with an external app.
+                        downloadUrlWithExternalApp(imageUrl);
+                    } else {  // Handle the download inside of Privacy Browser.
+                        // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
+                        new PrepareSaveDialog(this, this, getSupportFragmentManager(), currentWebView.getSettings().getUserAgentString(),
+                                currentWebView.getAcceptCookies()).execute(imageUrl);
+                    }
 
                     // Consume the event.
                     return true;
@@ -2406,9 +2447,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Add a Save Image entry.
                 menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
-                    new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
-                            currentWebView.getAcceptFirstPartyCookies()).execute(imageUrl);
+                    // Check the download preference.
+                    if (downloadWithExternalApp) {  // Download with an external app.
+                        downloadUrlWithExternalApp(imageUrl);
+                    } else {  // Handle the download inside of Privacy Browser.
+                        // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
+                        new PrepareSaveDialog(this, this, getSupportFragmentManager(), currentWebView.getSettings().getUserAgentString(),
+                                currentWebView.getAcceptCookies()).execute(imageUrl);
+                    }
 
                     // Consume the event.
                     return true;
@@ -2428,9 +2474,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Add a Save URL entry.
                 menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
-                    new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
-                            currentWebView.getAcceptFirstPartyCookies()).execute(linkUrl);
+                    // Check the download preference.
+                    if (downloadWithExternalApp) {  // Download with an external app.
+                        downloadUrlWithExternalApp(linkUrl);
+                    } else {  // Handle the download inside of Privacy Browser.
+                        // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
+                        new PrepareSaveDialog(this, this, getSupportFragmentManager(), currentWebView.getSettings().getUserAgentString(),
+                                currentWebView.getAcceptCookies()).execute(linkUrl);
+                    }
 
                     // Consume the event.
                     return true;
@@ -2699,62 +2750,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // close the bookmarks drawer.
             drawerLayout.closeDrawer(GravityCompat.END);
         } else if (displayingFullScreenVideo) {  // A full screen video is shown.
-            // Re-enable the screen timeout.
-            fullScreenVideoFrameLayout.setKeepScreenOn(false);
-
-            // Unset the full screen video flag.
-            displayingFullScreenVideo = false;
-
-            // Remove all the views from the full screen video frame layout.
-            fullScreenVideoFrameLayout.removeAllViews();
-
-            // Hide the full screen video frame layout.
-            fullScreenVideoFrameLayout.setVisibility(View.GONE);
-
-            // Enable the sliding drawers.
-            drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
-
-            // Show the main content relative layout.
-            mainContentRelativeLayout.setVisibility(View.VISIBLE);
-
-            // Apply the appropriate full screen mode flags.
-            if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
-                // Hide the banner ad in the free flavor.
-                if (BuildConfig.FLAVOR.contentEquals("free")) {
-                    // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-                    View adView = findViewById(R.id.adview);
-
-                    // Hide the banner ad.
-                    AdHelper.hideAd(adView);
-                }
-
-                /* Hide the system bars.
-                 * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-                 * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
-                 * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-                 * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
-                 */
-                rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
-                        View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-
-                // Reload the website if the app bar is hidden.  Otherwise, there is some bug in Android that causes the WebView to be entirely black.
-                if (hideAppBar) {
-                    // Reload the WebView.
-                    currentWebView.reload();
-                }
-            } else {  // Switch to normal viewing mode.
-                // Remove the `SYSTEM_UI` flags from the root frame layout.
-                rootFrameLayout.setSystemUiVisibility(0);
-            }
-
-            // Reload the ad for the free flavor if not in full screen mode.
-            if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
-                // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-                View adView = findViewById(R.id.adview);
-
-                // Reload the ad.  `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
-                AdHelper.loadAd(adView, getApplicationContext(), this, getString(R.string.ad_unit_id));
-            }
+            // Exit the full screen video.
+            exitFullScreenVideo();
         } else if (currentWebView.canGoBack()) {  // There is at least one item in the current WebView history.
             // Get the current web back forward list.
             WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
@@ -2772,11 +2769,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             closeCurrentTab();
         } else {  // There isn't anything to do in Privacy Browser.
             // Close Privacy Browser.  `finishAndRemoveTask()` also removes Privacy Browser from the recent app list.
-            if (Build.VERSION.SDK_INT >= 21) {
-                finishAndRemoveTask();
-            } else {
-                finish();
-            }
+            finishAndRemoveTask();
 
             // Manually kill Privacy Browser.  Otherwise, it is glitchy when restarted.
             System.exit(0);
@@ -2792,50 +2785,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Run the commands that correlate to the specified request code.
         switch (requestCode) {
             case BROWSE_FILE_UPLOAD_REQUEST_CODE:
-                // File uploads only work on API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    // Pass the file to the WebView.
-                    fileChooserCallback.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, returnedIntent));
-                }
-                break;
-
-            case BROWSE_SAVE_WEBPAGE_REQUEST_CODE:
-                // Don't do anything if the user pressed back from the file picker.
-                if (resultCode == Activity.RESULT_OK) {
-                    // Get a handle for the save dialog fragment.
-                    DialogFragment saveWebpageDialogFragment = (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.save_dialog));
-
-                    // Only update the file name if the dialog still exists.
-                    if (saveWebpageDialogFragment != null) {
-                        // Get a handle for the save webpage dialog.
-                        Dialog saveWebpageDialog = saveWebpageDialogFragment.getDialog();
-
-                        // Remove the incorrect lint warning below that the dialog might be null.
-                        assert saveWebpageDialog != null;
-
-                        // Get a handle for the file name edit text.
-                        EditText fileNameEditText = saveWebpageDialog.findViewById(R.id.file_name_edittext);
-                        TextView fileExistsWarningTextView = saveWebpageDialog.findViewById(R.id.file_exists_warning_textview);
-
-                        // Instantiate the file name helper.
-                        FileNameHelper fileNameHelper = new FileNameHelper();
-
-                        // Get the file path if it isn't null.
-                        if (returnedIntent.getData() != null) {
-                            // Convert the file name URI to a file name path.
-                            String fileNamePath = fileNameHelper.convertUriToFileNamePath(returnedIntent.getData());
-
-                            // Set the file name path as the text of the file name edit text.
-                            fileNameEditText.setText(fileNamePath);
-
-                            // Move the cursor to the end of the file name edit text.
-                            fileNameEditText.setSelection(fileNamePath.length());
-
-                            // Hide the file exists warning.
-                            fileExistsWarningTextView.setVisibility(View.GONE);
-                        }
-                    }
-                }
+                // Pass the file to the WebView.
+                fileChooserCallback.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, returnedIntent));
                 break;
 
             case BROWSE_OPEN_REQUEST_CODE:
@@ -2855,20 +2806,17 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         // Get a handle for the file name edit text.
                         EditText fileNameEditText = openDialog.findViewById(R.id.file_name_edittext);
 
-                        // Instantiate the file name helper.
-                        FileNameHelper fileNameHelper = new FileNameHelper();
+                        // Get the file name URI from the intent.
+                        Uri fileNameUri = returnedIntent.getData();
 
-                        // Get the file path if it isn't null.
-                        if (returnedIntent.getData() != null) {
-                            // Convert the file name URI to a file name path.
-                            String fileNamePath = fileNameHelper.convertUriToFileNamePath(returnedIntent.getData());
+                        // Get the file name string from the URI.
+                        String fileNameString = fileNameUri.toString();
 
-                            // Set the file name path as the text of the file name edit text.
-                            fileNameEditText.setText(fileNamePath);
+                        // Set the file name text.
+                        fileNameEditText.setText(fileNameString);
 
-                            // Move the cursor to the end of the file name edit text.
-                            fileNameEditText.setSelection(fileNamePath.length());
-                        }
+                        // Move the cursor to the end of the file name edit text.
+                        fileNameEditText.setSelection(fileNameString.length());
                     }
                 }
                 break;
@@ -2882,21 +2830,21 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Initialize the formatted URL string.
         String url = "";
 
-        // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
+        // Check to see if the unformatted URL string is a valid URL.  Otherwise, convert it into a search.
         if (unformattedUrlString.startsWith("content://")) {  // This is a Content URL.
             // Load the entire content URL.
             url = unformattedUrlString;
         } else if (Patterns.WEB_URL.matcher(unformattedUrlString).matches() || unformattedUrlString.startsWith("http://") || unformattedUrlString.startsWith("https://") ||
                 unformattedUrlString.startsWith("file://")) {  // This is a standard URL.
             // Add `https://` at the beginning if there is no protocol.  Otherwise the app will segfault.
-            if (!unformattedUrlString.startsWith("http") && !unformattedUrlString.startsWith("file://") && !unformattedUrlString.startsWith("content://")) {
+            if (!unformattedUrlString.startsWith("http") && !unformattedUrlString.startsWith("file://")) {
                 unformattedUrlString = "https://" + unformattedUrlString;
             }
 
-            // Initialize `unformattedUrl`.
+            // Initialize the unformatted URL.
             URL unformattedUrl = null;
 
-            // Convert `unformattedUrlString` to a `URL`, then to a `URI`, and then back to a `String`, which sanitizes the input and adds in any missing components.
+            // Convert the unformatted URL string to a URL, then to a URI, and then back to a string, which sanitizes the input and adds in any missing components.
             try {
                 unformattedUrl = new URL(unformattedUrlString);
             } catch (MalformedURLException e) {
@@ -3026,209 +2974,97 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Remove the incorrect lint warning below that the dialog might be null.
         assert dialog != null;
 
-        // Get a handle for the file name edit text.
+        // Get handles for the views.
         EditText fileNameEditText = dialog.findViewById(R.id.file_name_edittext);
+        CheckBox mhtCheckBox = dialog.findViewById(R.id.mht_checkbox);
 
         // Get the file path string.
-        openFilePath = fileNameEditText.getText().toString();
+        String openFilePath = fileNameEditText.getText().toString();
 
         // Apply the domain settings.  This resets the favorite icon and removes any domain settings.
-        applyDomainSettings(currentWebView, "file://" + openFilePath, true, false, false);
-
-        // Check to see if the storage permission is needed.
-        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // The storage permission has been granted.
-            // Open the file.
-            currentWebView.loadUrl("file://" + openFilePath);
-        } else {  // The storage permission has not been granted.
-            // Get the external private directory file.
-            File externalPrivateDirectoryFile = getExternalFilesDir(null);
-
-            // Remove the incorrect lint error below that the file might be null.
-            assert externalPrivateDirectoryFile != null;
-
-            // Get the external private directory string.
-            String externalPrivateDirectory = externalPrivateDirectoryFile.toString();
-
-            // Check to see if the file path is in the external private directory.
-            if (openFilePath.startsWith(externalPrivateDirectory)) {  // the file path is in the external private directory.
-                // Open the file.
-                currentWebView.loadUrl("file://" + openFilePath);
-            } else {  // The file path is in a public directory.
-                // Check if the user has previously denied the storage permission.
-                if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
-                    // Instantiate the storage permission alert dialog.
-                    DialogFragment storagePermissionDialogFragment = StoragePermissionDialog.displayDialog(StoragePermissionDialog.OPEN);
-
-                    // Show the storage permission alert dialog.  The permission will be requested the the dialog is closed.
-                    storagePermissionDialogFragment.show(getSupportFragmentManager(), getString(R.string.storage_permission));
-                } else {  // Show the permission request directly.
-                    // Request the write external storage permission.  The file will be opened when it finishes.
-                    ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, StoragePermissionDialog.OPEN);
-                }
-            }
-        }
-    }
+        applyDomainSettings(currentWebView, openFilePath, true, false, false);
 
-    @Override
-    public void onSaveWebpage(int saveType, String originalUrlString, DialogFragment dialogFragment) {
-        // Get the dialog.
-        Dialog dialog = dialogFragment.getDialog();
+        // Open the file according to the type.
+        if (mhtCheckBox.isChecked()) {  // Force opening of an MHT file.
+            try {
+                // Get the MHT file input stream.
+                InputStream mhtFileInputStream = getContentResolver().openInputStream(Uri.parse(openFilePath));
 
-        // Remove the incorrect lint warning below that the dialog might be null.
-        assert dialog != null;
+                // Create a temporary MHT file.
+                File temporaryMhtFile = File.createTempFile("temporary_mht_file", ".mht", getCacheDir());
 
-        // Get a handle for the edit texts.
-        EditText dialogUrlEditText = dialog.findViewById(R.id.url_edittext);
-        EditText fileNameEditText = dialog.findViewById(R.id.file_name_edittext);
+                // Get a file output stream for the temporary MHT file.
+                FileOutputStream temporaryMhtFileOutputStream = new FileOutputStream(temporaryMhtFile);
 
-        // Store the URL.
-        if ((originalUrlString != null) && originalUrlString.startsWith("data:")) {
-            // Save the original URL.
-            saveWebpageUrl = originalUrlString;
-        } else {
-            // Get the URL from the edit text, which may have been modified.
-            saveWebpageUrl = dialogUrlEditText.getText().toString();
-        }
+                // Create a transfer byte array.
+                byte[] transferByteArray = new byte[1024];
 
-        // Get the file path from the edit text.
-        saveWebpageFilePath = fileNameEditText.getText().toString();
-
-        // Check to see if the storage permission is needed.
-        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // The storage permission has been granted.
-            //Save the webpage according to the save type.
-            switch (saveType) {
-                case StoragePermissionDialog.SAVE_URL:
-                    // Save the URL.
-                    new SaveUrl(this, this, saveWebpageFilePath, currentWebView.getSettings().getUserAgentString(), currentWebView.getAcceptFirstPartyCookies()).execute(saveWebpageUrl);
-                    break;
-
-                case StoragePermissionDialog.SAVE_ARCHIVE:
-                    // Save the webpage archive.
-                    saveWebpageArchive(saveWebpageFilePath);
-                    break;
-
-                case StoragePermissionDialog.SAVE_IMAGE:
-                    // Save the webpage image.
-                    new SaveWebpageImage(this, this, saveWebpageFilePath, currentWebView).execute();
-                    break;
-            }
+                // Create an integer to track the number of bytes read.
+                int bytesRead;
 
-            // Reset the strings.
-            saveWebpageUrl = "";
-            saveWebpageFilePath = "";
-        } else {  // The storage permission has not been granted.
-            // Get the external private directory file.
-            File externalPrivateDirectoryFile = getExternalFilesDir(null);
-
-            // Remove the incorrect lint error below that the file might be null.
-            assert externalPrivateDirectoryFile != null;
-
-            // Get the external private directory string.
-            String externalPrivateDirectory = externalPrivateDirectoryFile.toString();
-
-            // Check to see if the file path is in the external private directory.
-            if (saveWebpageFilePath.startsWith(externalPrivateDirectory)) {  // The file path is in the external private directory.
-                // Save the webpage according to the save type.
-                switch (saveType) {
-                    case StoragePermissionDialog.SAVE_URL:
-                        // Save the URL.
-                        new SaveUrl(this, this, saveWebpageFilePath, currentWebView.getSettings().getUserAgentString(), currentWebView.getAcceptFirstPartyCookies()).execute(saveWebpageUrl);
-                        break;
+                // Copy the temporary MHT file input stream to the MHT output stream.
+                while ((bytesRead = mhtFileInputStream.read(transferByteArray)) > 0) {
+                    temporaryMhtFileOutputStream.write(transferByteArray, 0, bytesRead);
+                }
 
-                    case StoragePermissionDialog.SAVE_ARCHIVE:
-                        // Save the webpage archive.
-                        saveWebpageArchive(saveWebpageFilePath);
-                        break;
+                // Flush the temporary MHT file output stream.
+                temporaryMhtFileOutputStream.flush();
 
-                    case StoragePermissionDialog.SAVE_IMAGE:
-                        // Save the webpage image.
-                        new SaveWebpageImage(this, this, saveWebpageFilePath, currentWebView).execute();
-                        break;
-                }
+                // Close the streams.
+                temporaryMhtFileOutputStream.close();
+                mhtFileInputStream.close();
 
-                // Reset the strings.
-                saveWebpageUrl = "";
-                saveWebpageFilePath = "";
-            } else {  // The file path is in a public directory.
-                // Check if the user has previously denied the storage permission.
-                if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
-                    // Instantiate the storage permission alert dialog.
-                    DialogFragment storagePermissionDialogFragment = StoragePermissionDialog.displayDialog(saveType);
-
-                    // Show the storage permission alert dialog.  The permission will be requested when the dialog is closed.
-                    storagePermissionDialogFragment.show(getSupportFragmentManager(), getString(R.string.storage_permission));
-                } else {  // Show the permission request directly.
-                    // Request the write external storage permission according to the save type.  The URL will be saved when it finishes.
-                    ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, saveType);
-                }
+                // Load the temporary MHT file.
+                currentWebView.loadUrl(temporaryMhtFile.toString());
+            } catch (Exception exception) {
+                // Display a snackbar.
+                Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
             }
+        } else {  // Let the WebView handle opening of the file.
+            // Open the file.
+            currentWebView.loadUrl(openFilePath);
         }
     }
 
-    @Override
-    public void onCloseStoragePermissionDialog(int requestType) {
-        // Request the write external storage permission according to the request type.  The file will be opened when it finishes.
-        ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, requestType);
+    private void downloadUrlWithExternalApp(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.
+        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.download_with_external_app)));
     }
 
-    @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
-        //Only process the results if they exist (this method is triggered when a dialog is presented the first time for an app, but no grant results are included).
-        if (grantResults.length > 0) {
-            switch (requestCode) {
-                case StoragePermissionDialog.OPEN:
-                    // Check to see if the storage permission was granted.  If the dialog was canceled the grant results will be empty.
-                    if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {  // The storage permission was granted.
-                        // Load the file.
-                        currentWebView.loadUrl("file://" + openFilePath);
-                    } else {  // The storage permission was not granted.
-                        // Display an error snackbar.
-                        Snackbar.make(currentWebView, getString(R.string.cannot_use_location), Snackbar.LENGTH_LONG).show();
-                    }
-                    break;
-
-                case StoragePermissionDialog.SAVE_URL:
-                    // Check to see if the storage permission was granted.  If the dialog was canceled the grant results will be empty.
-                    if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {  // The storage permission was granted.
-                        // Save the raw URL.
-                        new SaveUrl(this, this, saveWebpageFilePath, currentWebView.getSettings().getUserAgentString(), currentWebView.getAcceptFirstPartyCookies()).execute(saveWebpageUrl);
-                    } else {  // The storage permission was not granted.
-                        // Display an error snackbar.
-                        Snackbar.make(currentWebView, getString(R.string.cannot_use_location), Snackbar.LENGTH_LONG).show();
-                    }
-                    break;
-
-                case StoragePermissionDialog.SAVE_ARCHIVE:
-                    // Check to see if the storage permission was granted.  If the dialog was canceled the grant results will be empty.
-                    if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {  // The storage permission was granted.
-                        // Save the webpage archive.
-                        saveWebpageArchive(saveWebpageFilePath);
-                    } else {  // The storage permission was not granted.
-                        // Display an error snackbar.
-                        Snackbar.make(currentWebView, getString(R.string.cannot_use_location), Snackbar.LENGTH_LONG).show();
-                    }
-                    break;
+    public void onSaveUrl(@NonNull String originalUrlString, @NonNull String fileNameString, @NonNull DialogFragment dialogFragment) {
+        // Store the URL.  This will be used in the save URL activity result launcher.
+        if (originalUrlString.startsWith("data:")) {
+            // Save the original URL.
+            saveUrlString = originalUrlString;
+        } else {
+            // Get the dialog.
+            Dialog dialog = dialogFragment.getDialog();
 
-                case StoragePermissionDialog.SAVE_IMAGE:
-                    // Check to see if the storage permission was granted.  If the dialog was canceled the grant results will be empty.
-                    if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {  // The storage permission was granted.
-                        // Save the webpage image.
-                        new SaveWebpageImage(this, this, saveWebpageFilePath, currentWebView).execute();
-                    } else {  // The storage permission was not granted.
-                        // Display an error snackbar.
-                        Snackbar.make(currentWebView, getString(R.string.cannot_use_location), Snackbar.LENGTH_LONG).show();
-                    }
-                    break;
-            }
+            // Remove the incorrect lint warning below that the dialog might be null.
+            assert dialog != null;
+
+            // Get a handle for the dialog URL edit text.
+            EditText dialogUrlEditText = dialog.findViewById(R.id.url_edittext);
 
-            // Reset the strings.
-            openFilePath = "";
-            saveWebpageUrl = "";
-            saveWebpageFilePath = "";
+            // Get the URL from the edit text, which may have been modified.
+            saveUrlString = dialogUrlEditText.getText().toString();
         }
-    }
 
+        // Open the file picker.
+        saveUrlActivityResultLauncher.launch(fileNameString);
+    }
+    
+    // Remove the warning that `OnTouchListener()` needs to override `performClick()`, as the only purpose of setting the `OnTouchListener()` is to make it do nothing.
+    @SuppressLint("ClickableViewAccessibility")
     private void initializeApp() {
         // Get a handle for the input method.
         InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
@@ -3236,18 +3072,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Remove the lint warning below that the input method manager might be null.
         assert inputMethodManager != null;
 
-        // Initialize the gray foreground color spans for highlighting the URLs.  The deprecated `getResources()` must be used until API >= 23.
-        initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
-        finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
+        // Initialize the gray foreground color spans for highlighting the URLs.
+        initialGrayColorSpan = new ForegroundColorSpan(getColor(R.color.gray_500));
+        finalGrayColorSpan = new ForegroundColorSpan(getColor(R.color.gray_500));
 
         // Get the current theme status.
         int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 
         // Set the red color span according to the theme.
         if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
-            redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
+            redColorSpan = new ForegroundColorSpan(getColor(R.color.red_a700));
         } else {
-            redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_900));
+            redColorSpan = new ForegroundColorSpan(getColor(R.color.red_900));
         }
 
         // Remove the formatting from the URL edit text when the user is editing the text.
@@ -3289,16 +3125,23 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
 
                 // If Privacy Browser is waiting on the proxy, load the website now that Orbot is connected.
-                if ((orbotStatus != null) && orbotStatus.equals("ON") && waitingForProxy) {
+                if ((orbotStatus != null) && orbotStatus.equals(ProxyHelper.ORBOT_STATUS_ON) && waitingForProxy) {
                     // Reset the waiting for proxy status.
                     waitingForProxy = false;
 
-                    // Get a handle for the waiting for proxy dialog.
-                    DialogFragment waitingForProxyDialogFragment = (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.waiting_for_proxy_dialog));
+                    // Get a list of the current fragments.
+                    List<Fragment> fragmentList = getSupportFragmentManager().getFragments();
+
+                    // Check each fragment to see if it is a waiting for proxy dialog.  Sometimes more than one is displayed.
+                    for (int i = 0; i < fragmentList.size(); i++) {
+                        // Get the fragment tag.
+                        String fragmentTag = fragmentList.get(i).getTag();
 
-                    // Dismiss the waiting for proxy dialog if it is displayed.
-                    if (waitingForProxyDialogFragment != null) {
-                        waitingForProxyDialogFragment.dismiss();
+                        // Check to see if it is the waiting for proxy dialog.
+                        if ((fragmentTag!= null) && fragmentTag.equals(getString(R.string.waiting_for_proxy_dialog))) {
+                            // Dismiss the waiting for proxy dialog.
+                            ((DialogFragment) fragmentList.get(i)).dismiss();
+                        }
                     }
 
                     // Reload existing URLs and load any URLs that are waiting for the proxy.
@@ -3323,7 +3166,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                                 loadUrl(nestedScrollWebView, waitingForProxyUrlString);
 
                                 // Reset the waiting for proxy URL string.
-                                nestedScrollWebView.resetWaitingForProxyUrlString();
+                                nestedScrollWebView.setWaitingForProxyUrlString("");
                             } else {  // No URL is waiting to be loaded.
                                 // Reload the existing URL.
                                 nestedScrollWebView.reload();
@@ -3338,6 +3181,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
 
         // Get handles for views that need to be modified.
+        LinearLayout bookmarksHeaderLinearLayout = findViewById(R.id.bookmarks_header_linearlayout);
         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);
@@ -3397,13 +3241,19 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             @Override
             public void onTabReselected(TabLayout.Tab tab) {
                 // Instantiate the View SSL Certificate dialog.
-                DialogFragment viewSslCertificateDialogFragment = ViewSslCertificateDialog.displayDialog(currentWebView.getWebViewFragmentId());
+                DialogFragment viewSslCertificateDialogFragment = ViewSslCertificateDialog.displayDialog(currentWebView.getWebViewFragmentId(), currentWebView.getFavoriteOrDefaultIcon());
 
                 // Display the View SSL Certificate dialog.
                 viewSslCertificateDialogFragment.show(getSupportFragmentManager(), getString(R.string.view_ssl_certificate));
             }
         });
 
+        // Set a touch listener on the bookmarks header linear layout so that touches don't pass through to the button underneath.
+        bookmarksHeaderLinearLayout.setOnTouchListener((view, motionEvent) -> {
+            // Consume the touch.
+            return true;
+        });
+
         // Set the launch bookmarks activity FAB to launch the bookmarks activity.
         launchBookmarksActivityFab.setOnClickListener(v -> {
             // Get a copy of the favorite icon bitmap.
@@ -3485,18 +3335,17 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         });
 
         // Implement swipe to refresh.
-        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
+        swipeRefreshLayout.setOnRefreshListener(() -> {
+            // Reload the website.
+            currentWebView.reload();
+        });
 
         // Store the default progress view offsets for use later in `initializeWebView()`.
         defaultProgressViewStartOffset = swipeRefreshLayout.getProgressViewStartOffset();
         defaultProgressViewEndOffset = swipeRefreshLayout.getProgressViewEndOffset();
 
         // Set the refresh color scheme according to the theme.
-        if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
-            swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
-        } else {
-            swipeRefreshLayout.setColorSchemeResources(R.color.violet_500);
-        }
+        swipeRefreshLayout.setColorSchemeResources(R.color.blue_text);
 
         // Initialize a color background typed value.
         TypedValue colorBackgroundTypedValue = new TypedValue();
@@ -3534,15 +3383,15 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             bookmarkCursor.moveToFirst();
 
             // Act upon the bookmark according to the type.
-            if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
+            if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
                 // Store the new folder name in `currentBookmarksFolder`.
-                currentBookmarksFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+                currentBookmarksFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
                 // Load the new folder.
                 loadBookmarksFolder();
             } else {  // The selected bookmark is not a folder.
                 // Load the bookmark URL.
-                loadUrl(currentWebView, bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
+                loadUrl(currentWebView, bookmarkCursor.getString(bookmarkCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.BOOKMARK_URL)));
 
                 // Close the bookmarks drawer.
                 drawerLayout.closeDrawer(GravityCompat.END);
@@ -3559,16 +3408,17 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Find out if the selected bookmark is a folder.
             boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
 
-            if (isFolder) {
+            // Check to see if the bookmark is a folder.
+            if (isFolder) {  // The bookmark is a folder.
                 // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
-                oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+                oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
                 // Instantiate the edit folder bookmark dialog.
                 DialogFragment editBookmarkFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
 
                 // Show the edit folder bookmark dialog.
                 editBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.edit_folder));
-            } else {
+            } else {  // The bookmark is not a folder.
                 // Get the bookmark cursor for this ID.
                 Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseId);
 
@@ -3576,7 +3426,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 bookmarkCursor.moveToFirst();
 
                 // Load the bookmark in a new tab but do not switch to the tab or close the drawer.
-                addNewTab(bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)), false);
+                addNewTab(bookmarkCursor.getString(bookmarkCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.BOOKMARK_URL)), false);
+
+                // Display a snackbar.
+                Snackbar.make(currentWebView, R.string.bookmark_opened_in_background, Snackbar.LENGTH_SHORT).show();
             }
 
             // Consume the event.
@@ -3613,9 +3466,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         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.
+                    // Clear the focus from from the URL text box.  This removes any text selection markers and context menus, which otherwise draw above the open drawers.
                     urlEditText.clearFocus();
-                    currentWebView.clearFocus();
+
+                    // Clear the focus from from the WebView if it is not null, which can happen if a user opens a drawer while the browser is being resumed.
+                    if (currentWebView != null) {
+                        // Clearing the focus from the WebView removes any text selection markers and context menus, which otherwise draw above the open drawers.
+                        currentWebView.clearFocus();
+                    }
                 }
             }
         });
@@ -3642,14 +3500,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // Store the values from the shared preferences in variables.
         incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
-        boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
         sanitizeGoogleAnalytics = sharedPreferences.getBoolean("google_analytics", true);
         sanitizeFacebookClickIds = sharedPreferences.getBoolean("facebook_click_ids", true);
         sanitizeTwitterAmpRedirects = sharedPreferences.getBoolean("twitter_amp_redirects", true);
         proxyMode = sharedPreferences.getString("proxy", getString(R.string.proxy_default_value));
         fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
+        downloadWithExternalApp = sharedPreferences.getBoolean(getString(R.string.download_with_external_app_key), false);
         hideAppBar = sharedPreferences.getBoolean("hide_app_bar", true);
-        scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
+        scrollAppBar = sharedPreferences.getBoolean(getString(R.string.scroll_app_bar_key), true);
 
         // Apply the saved proxy mode if the app has been restarted.
         if (savedProxyMode != null) {
@@ -3673,58 +3531,48 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Apply the proxy.
         applyProxy(false);
 
-        // Set Do Not Track status.
-        if (doNotTrackEnabled) {
-            customHeaders.put("DNT", "1");
-        } else {
-            customHeaders.remove("DNT");
-        }
-
-        // Get the current layout parameters.  Using coordinator layout parameters allows the `setBehavior()` command and using app bar layout parameters allows the `setScrollFlags()` command.
-        CoordinatorLayout.LayoutParams swipeRefreshLayoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
-        AppBarLayout.LayoutParams toolbarLayoutParams = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
-        AppBarLayout.LayoutParams findOnPageLayoutParams = (AppBarLayout.LayoutParams) findOnPageLinearLayout.getLayoutParams();
-        AppBarLayout.LayoutParams tabsLayoutParams = (AppBarLayout.LayoutParams) tabsLinearLayout.getLayoutParams();
-
-        // Add the scrolling behavior to the layout parameters.
-        if (scrollAppBar) {
-            // Enable scrolling of the app bar.
-            swipeRefreshLayoutParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());
-            toolbarLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
-            findOnPageLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
-            tabsLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
-        } else {
-            // Disable scrolling of the app bar.
-            swipeRefreshLayoutParams.setBehavior(null);
-            toolbarLayoutParams.setScrollFlags(0);
-            findOnPageLayoutParams.setScrollFlags(0);
-            tabsLayoutParams.setScrollFlags(0);
-
-            // Expand the app bar if it is currently collapsed.
-            appBarLayout.setExpanded(true);
-        }
-
-        // Apply the modified layout parameters.
-        swipeRefreshLayout.setLayoutParams(swipeRefreshLayoutParams);
-        toolbar.setLayoutParams(toolbarLayoutParams);
-        findOnPageLinearLayout.setLayoutParams(findOnPageLayoutParams);
-        tabsLinearLayout.setLayoutParams(tabsLayoutParams);
+        // Adjust the layout and scrolling parameters if the app bar is at the top of the screen.
+        if (!bottomAppBar) {
+            // Get the current layout parameters.  Using coordinator layout parameters allows the `setBehavior()` command and using app bar layout parameters allows the `setScrollFlags()` command.
+            CoordinatorLayout.LayoutParams swipeRefreshLayoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
+            AppBarLayout.LayoutParams toolbarLayoutParams = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
+            AppBarLayout.LayoutParams findOnPageLayoutParams = (AppBarLayout.LayoutParams) findOnPageLinearLayout.getLayoutParams();
+            AppBarLayout.LayoutParams tabsLayoutParams = (AppBarLayout.LayoutParams) tabsLinearLayout.getLayoutParams();
+
+            // Add the scrolling behavior to the layout parameters.
+            if (scrollAppBar) {
+                // Enable scrolling of the app bar.
+                swipeRefreshLayoutParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());
+                toolbarLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+                findOnPageLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+                tabsLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+            } else {
+                // Disable scrolling of the app bar.
+                swipeRefreshLayoutParams.setBehavior(null);
+                toolbarLayoutParams.setScrollFlags(0);
+                findOnPageLayoutParams.setScrollFlags(0);
+                tabsLayoutParams.setScrollFlags(0);
+
+                // Expand the app bar if it is currently collapsed.
+                appBarLayout.setExpanded(true);
+            }
 
-        // Set the app bar scrolling for each WebView.
-        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-            // Get the WebView tab fragment.
-            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+            // Set 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();
+                // 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);
+                // Only modify the WebViews if they exist.
+                if (fragmentView != null) {
+                    // Get the nested scroll WebView from the tab fragment.
+                    NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-                // Set the app bar scrolling.
-                nestedScrollWebView.setNestedScrollingEnabled(scrollAppBar);
+                    // Set the app bar scrolling.
+                    nestedScrollWebView.setNestedScrollingEnabled(scrollAppBar);
+                }
             }
         }
 
@@ -3745,15 +3593,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 actionBar.show();
             }
 
-            // Hide the banner ad in the free flavor.
-            if (BuildConfig.FLAVOR.contentEquals("free")) {
-                // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-                View adView = findViewById(R.id.adview);
-
-                // Hide the banner ad.
-                AdHelper.hideAd(adView);
-            }
-
             /* Hide the system bars.
              * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
              * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
@@ -3772,23 +3611,13 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Show the action bar.
             actionBar.show();
 
-            // Show the banner ad in the free flavor.
-            if (BuildConfig.FLAVOR.contentEquals("free")) {
-                // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-                View adView = findViewById(R.id.adview);
-
-                // Initialize the ads.  If this isn't the first run, `loadAd()` will be automatically called instead.
-                // `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
-                AdHelper.initializeAds(adView, getApplicationContext(), this, getSupportFragmentManager(), getString(R.string.ad_unit_id));
-            }
-
             // Remove the `SYSTEM_UI` flags from the root frame layout.
             rootFrameLayout.setSystemUiVisibility(0);
         }
     }
 
     @Override
-    public void navigateHistory(String url, int steps) {
+    public void navigateHistory(@NonNull String url, int steps) {
         // Apply the domain settings.
         applyDomainSettings(currentWebView, url, false, false, false);
 
@@ -3838,7 +3667,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             // Clear any pinned SSL certificate or IP addresses.
             nestedScrollWebView.clearPinnedSslCertificate();
-            nestedScrollWebView.clearPinnedIpAddresses();
+            nestedScrollWebView.setPinnedIpAddresses("");
 
             // Reset the favorite icon if specified.
             if (resetTab) {
@@ -3881,14 +3710,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             Set<String> domainSettingsSet = new HashSet<>();
 
             // Get the domain name column index.
-            int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
+            int domainNameColumnIndex = domainNameCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.DOMAIN_NAME);
 
             // Populate `domainSettingsSet`.
             for (int i = 0; i < domainNameCursor.getCount(); i++) {
-                // Move `domainsCursor` to the current row.
+                // Move the domains cursor to the current row.
                 domainNameCursor.moveToPosition(i);
 
-                // Store the domain name in `domainSettingsSet`.
+                // Store the domain name in the domain settings set.
                 domainSettingsSet.add(domainNameCursor.getString(domainNameColumnIndex));
             }
 
@@ -3952,63 +3781,37 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 currentDomainSettingsCursor.moveToFirst();
 
                 // Get the settings from the cursor.
-                nestedScrollWebView.setDomainSettingsDatabaseId(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper._ID)));
-                nestedScrollWebView.getSettings().setJavaScriptEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_JAVASCRIPT)) == 1);
-                nestedScrollWebView.setAcceptFirstPartyCookies(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES)) == 1);
-                boolean domainThirdPartyCookiesEnabled = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES)) == 1);
-                nestedScrollWebView.getSettings().setDomStorageEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)) == 1);
+                nestedScrollWebView.setDomainSettingsDatabaseId(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper._ID)));
+                nestedScrollWebView.getSettings().setJavaScriptEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.ENABLE_JAVASCRIPT)) == 1);
+                nestedScrollWebView.setAcceptCookies(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.COOKIES)) == 1);
+                nestedScrollWebView.getSettings().setDomStorageEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)) == 1);
                 // Form data can be removed once the minimum API >= 26.
-                boolean saveFormData = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)) == 1);
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYLIST,
-                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYLIST)) == 1);
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY,
-                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYPRIVACY)) == 1);
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST,
-                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_ANNOYANCE_LIST)) == 1);
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST,
-                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_SOCIAL_BLOCKING_LIST)) == 1);
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ULTRALIST)) == 1);
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY,
-                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_ULTRAPRIVACY)) == 1);
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS,
-                        currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.BLOCK_ALL_THIRD_PARTY_REQUESTS)) == 1);
-                String userAgentName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.USER_AGENT));
-                int fontSize = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE));
-                int swipeToRefreshInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SWIPE_TO_REFRESH));
-                int webViewThemeInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.WEBVIEW_THEME));
-                int wideViewportInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.WIDE_VIEWPORT));
-                int displayWebpageImagesInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES));
-                boolean pinnedSslCertificate = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.PINNED_SSL_CERTIFICATE)) == 1);
-                String pinnedSslIssuedToCName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_COMMON_NAME));
-                String pinnedSslIssuedToOName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATION));
-                String pinnedSslIssuedToUName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATIONAL_UNIT));
-                String pinnedSslIssuedByCName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_COMMON_NAME));
-                String pinnedSslIssuedByOName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATION));
-                String pinnedSslIssuedByUName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATIONAL_UNIT));
-                boolean pinnedIpAddresses = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.PINNED_IP_ADDRESSES)) == 1);
-                String pinnedHostIpAddresses = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.IP_ADDRESSES));
-
-                // Get the pinned SSL date longs.
-                long pinnedSslStartDateLong = currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_START_DATE));
-                long pinnedSslEndDateLong = currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_END_DATE));
-
-                // Define the pinned SSL date variables.
-                Date pinnedSslStartDate;
-                Date pinnedSslEndDate;
-
-                // Set the pinned SSL certificate start date to `null` if the saved date long is 0 because creating a new date results in an error if the input is 0.
-                if (pinnedSslStartDateLong == 0) {
-                    pinnedSslStartDate = null;
-                } else {
-                    pinnedSslStartDate = new Date(pinnedSslStartDateLong);
-                }
-
-                // Set the pinned SSL certificate end date to `null` if the saved date long is 0 because creating a new date results in an error if the input is 0.
-                if (pinnedSslEndDateLong == 0) {
-                    pinnedSslEndDate = null;
-                } else {
-                    pinnedSslEndDate = new Date(pinnedSslEndDateLong);
-                }
+                boolean saveFormData = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.ENABLE_FORM_DATA)) == 1);
+                nestedScrollWebView.setEasyListEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.ENABLE_EASYLIST)) == 1);
+                nestedScrollWebView.setEasyPrivacyEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.ENABLE_EASYPRIVACY)) == 1);
+                nestedScrollWebView.setFanboysAnnoyanceListEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.ENABLE_FANBOYS_ANNOYANCE_LIST)) == 1);
+                nestedScrollWebView.setFanboysSocialBlockingListEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(
+                        DomainsDatabaseHelper.ENABLE_FANBOYS_SOCIAL_BLOCKING_LIST)) == 1);
+                nestedScrollWebView.setUltraListEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.ULTRALIST)) == 1);
+                nestedScrollWebView.setUltraPrivacyEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.ENABLE_ULTRAPRIVACY)) == 1);
+                nestedScrollWebView.setBlockAllThirdPartyRequests(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.BLOCK_ALL_THIRD_PARTY_REQUESTS)) == 1);
+                String userAgentName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.USER_AGENT));
+                int fontSize = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.FONT_SIZE));
+                int swipeToRefreshInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.SWIPE_TO_REFRESH));
+                int webViewThemeInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.WEBVIEW_THEME));
+                int wideViewportInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.WIDE_VIEWPORT));
+                int displayWebpageImagesInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.DISPLAY_IMAGES));
+                boolean pinnedSslCertificate = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.PINNED_SSL_CERTIFICATE)) == 1);
+                String pinnedSslIssuedToCName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.SSL_ISSUED_TO_COMMON_NAME));
+                String pinnedSslIssuedToOName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATION));
+                String pinnedSslIssuedToUName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATIONAL_UNIT));
+                String pinnedSslIssuedByCName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.SSL_ISSUED_BY_COMMON_NAME));
+                String pinnedSslIssuedByOName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATION));
+                String pinnedSslIssuedByUName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATIONAL_UNIT));
+                Date pinnedSslStartDate = new Date(currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.SSL_START_DATE)));
+                Date pinnedSslEndDate = new Date(currentDomainSettingsCursor.getLong(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.SSL_END_DATE)));
+                boolean pinnedIpAddresses = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.PINNED_IP_ADDRESSES)) == 1);
+                String pinnedHostIpAddresses = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndexOrThrow(DomainsDatabaseHelper.IP_ADDRESSES));
 
                 // Close the current host domain settings cursor.
                 currentDomainSettingsCursor.close();
@@ -4025,12 +3828,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 }
 
                 // Apply the cookie domain settings.
-                cookieManager.setAcceptCookie(nestedScrollWebView.getAcceptFirstPartyCookies());
-
-                // Set third-party cookies status if API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, domainThirdPartyCookiesEnabled);
-                }
+                cookieManager.setAcceptCookie(nestedScrollWebView.getAcceptCookies());
 
                 // Apply the form data setting if the API < 26.
                 if (Build.VERSION.SDK_INT < 26) {
@@ -4197,32 +3995,24 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         break;
                 }
 
-                // Get the current theme status.
-                int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
-
                 // Set a background on the URL relative layout to indicate that custom domain settings are being used.
-                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
-                    urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.drawable.url_bar_background_light_green, null));
-                } else {
-                    urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.drawable.url_bar_background_dark_blue, null));
-                }
+                urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.drawable.domain_settings_url_background, null));
             } else {  // The new URL does not have custom domain settings.  Load the defaults.
                 // Store the values from the shared preferences.
                 nestedScrollWebView.getSettings().setJavaScriptEnabled(sharedPreferences.getBoolean("javascript", false));
-                nestedScrollWebView.setAcceptFirstPartyCookies(sharedPreferences.getBoolean("first_party_cookies", false));
-                boolean defaultThirdPartyCookiesEnabled = sharedPreferences.getBoolean("third_party_cookies", false);
+                nestedScrollWebView.setAcceptCookies(sharedPreferences.getBoolean(getString(R.string.cookies_key), false));
                 nestedScrollWebView.getSettings().setDomStorageEnabled(sharedPreferences.getBoolean("dom_storage", false));
                 boolean saveFormData = sharedPreferences.getBoolean("save_form_data", false);  // Form data can be removed once the minimum API >= 26.
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYLIST, sharedPreferences.getBoolean("easylist", true));
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, sharedPreferences.getBoolean("easyprivacy", true));
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, sharedPreferences.getBoolean("fanboys_annoyance_list", true));
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, sharedPreferences.getBoolean("fanboys_social_blocking_list", true));
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, sharedPreferences.getBoolean("ultralist", true));
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, sharedPreferences.getBoolean("ultraprivacy", true));
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, sharedPreferences.getBoolean("block_all_third_party_requests", false));
+                nestedScrollWebView.setEasyListEnabled(sharedPreferences.getBoolean("easylist", true));
+                nestedScrollWebView.setEasyPrivacyEnabled(sharedPreferences.getBoolean("easyprivacy", true));
+                nestedScrollWebView.setFanboysAnnoyanceListEnabled(sharedPreferences.getBoolean("fanboys_annoyance_list", true));
+                nestedScrollWebView.setFanboysSocialBlockingListEnabled(sharedPreferences.getBoolean("fanboys_social_blocking_list", true));
+                nestedScrollWebView.setUltraListEnabled(sharedPreferences.getBoolean("ultralist", true));
+                nestedScrollWebView.setUltraPrivacyEnabled(sharedPreferences.getBoolean("ultraprivacy", true));
+                nestedScrollWebView.setBlockAllThirdPartyRequests(sharedPreferences.getBoolean("block_all_third_party_requests", false));
 
-                // Apply the default first-party cookie setting.
-                cookieManager.setAcceptCookie(nestedScrollWebView.getAcceptFirstPartyCookies());
+                // Apply the default cookie setting.
+                cookieManager.setAcceptCookie(nestedScrollWebView.getAcceptCookies());
 
                 // Apply the default font size setting.
                 try {
@@ -4253,11 +4043,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // 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);
-                }
-
                 // Get the array position of the user agent name.
                 int userAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
 
@@ -4336,8 +4121,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     }
 
     private void applyProxy(boolean reloadWebViews) {
-        // Set the proxy according to the mode.  `this` refers to the current activity where an alert dialog might be displayed.
-        ProxyHelper.setProxy(getApplicationContext(), appBarLayout, proxyMode);
+        // Set the proxy according to the mode.
+        proxyHelper.setProxy(getApplicationContext(), appBarLayout, proxyMode);
 
         // Reset the waiting for proxy tracker.
         waitingForProxy = false;
@@ -4378,7 +4163,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     packageManager.getPackageInfo("org.torproject.android", 0);
 
                     // Check to see if the proxy is ready.
-                    if (!orbotStatus.equals("ON")) {  // Orbot is not ready.
+                    if (!orbotStatus.equals(ProxyHelper.ORBOT_STATUS_ON)) {  // Orbot is not ready.
                         // Set the waiting for proxy status.
                         waitingForProxy = true;
 
@@ -4387,8 +4172,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                             // Get a handle for the waiting for proxy alert dialog.
                             DialogFragment waitingForProxyDialogFragment = new WaitingForProxyDialog();
 
-                            // Display the waiting for proxy alert dialog.
-                            waitingForProxyDialogFragment.show(getSupportFragmentManager(), getString(R.string.waiting_for_proxy_dialog));
+                            // Try to show the dialog.  Sometimes the window is not yet active if returning from Settings.
+                            try {
+                                // Show the waiting for proxy alert dialog.
+                                waitingForProxyDialogFragment.show(getSupportFragmentManager(), getString(R.string.waiting_for_proxy_dialog));
+                            } catch (Exception waitingForTorException) {
+                                // Add the dialog to the pending dialog array list.  It will be displayed in `onStart()`.
+                                pendingDialogsArrayList.add(new PendingDialog(waitingForProxyDialogFragment, getString(R.string.waiting_for_proxy_dialog)));
+                            }
                         }
                     }
                 } catch (PackageManager.NameNotFoundException exception) {  // Orbot is not installed.
@@ -4397,8 +4188,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         // Get a handle for the Orbot not installed alert dialog.
                         DialogFragment orbotNotInstalledDialogFragment = ProxyNotInstalledDialog.displayDialog(proxyMode);
 
-                        // Display the Orbot not installed alert dialog.
-                        orbotNotInstalledDialogFragment.show(getSupportFragmentManager(), getString(R.string.proxy_not_installed_dialog));
+                        // Try to show the dialog.  Sometimes the window is not yet active if returning from Settings.
+                        try {
+                            // Display the Orbot not installed alert dialog.
+                            orbotNotInstalledDialogFragment.show(getSupportFragmentManager(), getString(R.string.proxy_not_installed_dialog));
+                        } catch (Exception orbotNotInstalledException) {
+                            // Add the dialog to the pending dialog array list.  It will be displayed in `onStart()`.
+                            pendingDialogsArrayList.add(new PendingDialog(orbotNotInstalledDialogFragment, getString(R.string.proxy_not_installed_dialog)));
+                        }
                     }
                 }
                 break;
@@ -4417,15 +4214,21 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     PackageManager packageManager = getPackageManager();
 
                     // Check to see if I2P is in the list.  This will throw an error and drop to the catch section if it isn't installed.
-                    packageManager.getPackageInfo("org.torproject.android", 0);
+                    packageManager.getPackageInfo("net.i2p.android.router", 0);
                 } catch (PackageManager.NameNotFoundException exception) {  // I2P is not installed.
                     // Sow the I2P not installed dialog if it is not already displayed.
                     if (getSupportFragmentManager().findFragmentByTag(getString(R.string.proxy_not_installed_dialog)) == null) {
                         // Get a handle for the waiting for proxy alert dialog.
                         DialogFragment i2pNotInstalledDialogFragment = ProxyNotInstalledDialog.displayDialog(proxyMode);
 
-                        // Display the I2P not installed alert dialog.
-                        i2pNotInstalledDialogFragment.show(getSupportFragmentManager(), getString(R.string.proxy_not_installed_dialog));
+                        // Try to show the dialog.  Sometimes the window is not yet active if returning from Settings.
+                        try {
+                            // Display the I2P not installed alert dialog.
+                            i2pNotInstalledDialogFragment.show(getSupportFragmentManager(), getString(R.string.proxy_not_installed_dialog));
+                        } catch (Exception i2pNotInstalledException) {
+                            // Add the dialog to the pending dialog array list.  It will be displayed in `onStart()`.
+                            pendingDialogsArrayList.add(new PendingDialog(i2pNotInstalledDialogFragment, getString(R.string.proxy_not_installed_dialog)));
+                        }
                     }
                 }
                 break;
@@ -4468,41 +4271,26 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Update the privacy icon.
             if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is enabled.
                 optionsPrivacyMenuItem.setIcon(R.drawable.javascript_enabled);
-            } else if (currentWebView.getAcceptFirstPartyCookies()) {  // JavaScript is disabled but cookies are enabled.
+            } else if (currentWebView.getAcceptCookies()) {  // JavaScript is disabled but cookies are enabled.
                 optionsPrivacyMenuItem.setIcon(R.drawable.warning);
             } else {  // All the dangerous features are disabled.
                 optionsPrivacyMenuItem.setIcon(R.drawable.privacy_mode);
             }
 
-            // Get the current theme status.
-            int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
-
-            // Update the first-party cookies icon.
-            if (currentWebView.getAcceptFirstPartyCookies()) {  // First-party cookies are enabled.
-                optionsFirstPartyCookiesMenuItem.setIcon(R.drawable.cookies_enabled);
-            } else {  // First-party cookies are disabled.
-                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
-                    optionsFirstPartyCookiesMenuItem.setIcon(R.drawable.cookies_disabled_day);
-                } else {
-                    optionsFirstPartyCookiesMenuItem.setIcon(R.drawable.cookies_disabled_night);
-                }
+            // Update the cookies icon.
+            if (currentWebView.getAcceptCookies()) {
+                optionsCookiesMenuItem.setIcon(R.drawable.cookies_enabled);
+            } else {
+                optionsCookiesMenuItem.setIcon(R.drawable.cookies_disabled);
             }
 
             // Update the refresh icon.
             if (optionsRefreshMenuItem.getTitle() == getString(R.string.refresh)) {  // The refresh icon is displayed.
-                // Set the icon according to the theme.
-                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
-                    optionsRefreshMenuItem.setIcon(R.drawable.refresh_enabled_day);
-                } else {
-                    optionsRefreshMenuItem.setIcon(R.drawable.refresh_enabled_night);
-                }
+                // Set the icon.  Once the minimum API is >= 26, the blue and black icons can be combined with a tint list.
+                optionsRefreshMenuItem.setIcon(R.drawable.refresh_enabled);
             } else {  // The stop icon is displayed.
-                // Set the icon according to the theme.
-                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
-                    optionsRefreshMenuItem.setIcon(R.drawable.close_blue_day);
-                } else {
-                    optionsRefreshMenuItem.setIcon(R.drawable.close_blue_night);
-                }
+                // Set the icon.  Once the minimum API is >= 26, the blue and black icons can be combined with a tint list.
+                optionsRefreshMenuItem.setIcon(R.drawable.close_blue);
             }
 
             // `invalidateOptionsMenu()` calls `onPrepareOptionsMenu()` and redraws the icons in the app bar.
@@ -4574,11 +4362,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // 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`.
+        // Populate the bookmarks cursor adapter.
         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.
+                // Inflate the individual item layout.
                 return getLayoutInflater().inflate(R.layout.bookmarks_drawer_item_linearlayout, parent, false);
             }
 
@@ -4589,7 +4377,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 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));
+                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndexOrThrow(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);
@@ -4598,11 +4386,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 
                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
-                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+                String bookmarkNameString = cursor.getString(cursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.BOOKMARK_NAME));
                 bookmarkNameTextView.setText(bookmarkNameString);
 
                 // Make the font bold for folders.
-                if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
+                if (cursor.getInt(cursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
                 } else {  // Reset the font to default for normal bookmarks.
                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
@@ -4846,6 +4634,15 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // Add the new WebView page.
         webViewPagerAdapter.addPage(newTabNumber, webViewPager, url, moveToTab);
+
+        // Show the app bar if it is at the bottom of the screen and the new tab is taking focus.
+        if (bottomAppBar && moveToTab && (appBarLayout.getTranslationY() != 0)) {
+            // Animate the bottom app bar onto the screen.
+            objectAnimator = ObjectAnimator.ofFloat(appBarLayout, "translationY", 0);
+
+            // Make it so.
+            objectAnimator.start();
+        }
     }
 
     public void closeTab(View view) {
@@ -4872,46 +4669,48 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         }
     }
 
-    private void saveWebpageArchive(String filePath) {
-        // Save the webpage archive.
-        currentWebView.saveWebArchive(filePath);
+    private void exitFullScreenVideo() {
+        // Re-enable the screen timeout.
+        fullScreenVideoFrameLayout.setKeepScreenOn(false);
 
-        // Display a snackbar.
-        Snackbar saveWebpageArchiveSnackbar = Snackbar.make(currentWebView, getString(R.string.file_saved) + "  " + filePath, Snackbar.LENGTH_SHORT);
+        // Unset the full screen video flag.
+        displayingFullScreenVideo = false;
 
-        // Add an open option to the snackbar.
-        saveWebpageArchiveSnackbar.setAction(R.string.open, (View view) -> {
-            // Get a file for the file name string.
-            File file = new File(filePath);
+        // Remove all the views from the full screen video frame layout.
+        fullScreenVideoFrameLayout.removeAllViews();
 
-            // Declare a file URI variable.
-            Uri fileUri;
-
-            // Get the URI for the file according to the Android version.
-            if (Build.VERSION.SDK_INT >= 24) {  // Use a file provider.
-                fileUri = FileProvider.getUriForFile(this, getString(R.string.file_provider), file);
-            } else {  // Get the raw file path URI.
-                fileUri = Uri.fromFile(file);
-            }
+        // Hide the full screen video frame layout.
+        fullScreenVideoFrameLayout.setVisibility(View.GONE);
 
-            // Get a handle for the content resolver.
-            ContentResolver contentResolver = getContentResolver();
+        // Enable the sliding drawers.
+        drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 
-            // Create an open intent with `ACTION_VIEW`.
-            Intent openIntent = new Intent(Intent.ACTION_VIEW);
+        // Show the coordinator layout.
+        coordinatorLayout.setVisibility(View.VISIBLE);
 
-            // Set the URI and the MIME type.
-            openIntent.setDataAndType(fileUri, contentResolver.getType(fileUri));
-
-            // Allow the app to read the file URI.
-            openIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+        // Apply the appropriate full screen mode flags.
+        if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
+            // Hide the app bar if specified.
+            if (hideAppBar) {
+                // Hide the tab linear layout.
+                tabsLinearLayout.setVisibility(View.GONE);
 
-            // Show the chooser.
-            startActivity(Intent.createChooser(openIntent, getString(R.string.open)));
-        });
+                // Hide the action bar.
+                actionBar.hide();
+            }
 
-        // Show the snackbar.
-        saveWebpageArchiveSnackbar.show();
+            /* 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);
+        }
     }
 
     private void clearAndExit() {
@@ -4934,12 +4733,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // Clear cookies.
         if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
-            // The command to remove cookies changed slightly in API 21.
-            if (Build.VERSION.SDK_INT >= 21) {
-                CookieManager.getInstance().removeAllCookies(null);
-            } else {
-                CookieManager.getInstance().removeAllCookie();
-            }
+            // Request the cookies be deleted.
+            CookieManager.getInstance().removeAllCookies(null);
 
             // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
             try {
@@ -5097,11 +4892,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         }
 
         // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
-        if (Build.VERSION.SDK_INT >= 21) {
-            finishAndRemoveTask();
-        } else {
-            finish();
-        }
+        finishAndRemoveTask();
 
         // Remove the terminated program from RAM.  The status code is `0`.
         System.exit(0);
@@ -5147,8 +4938,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Get a handle for the cookie manager.
             CookieManager cookieManager = CookieManager.getInstance();
 
-            // Set the first-party cookie status.
-            cookieManager.setAcceptCookie(currentWebView.getAcceptFirstPartyCookies());
+            // Set the cookie status.
+            cookieManager.setAcceptCookie(currentWebView.getAcceptCookies());
 
             // Update the privacy icons.  `true` redraws the icons in the app bar.
             updatePrivacyIcons(true);
@@ -5193,16 +4984,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             // Set the background to indicate the domain settings status.
             if (currentWebView.getDomainSettingsApplied()) {
-                // Get the current theme status.
-                int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
-
-                // Set a green background on the URL relative layout to indicate that custom domain settings are being used.
-                if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
-                    urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.drawable.url_bar_background_light_green, null));
-                } else {
-                    urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.drawable.url_bar_background_dark_blue, null));
-                }
+                // Set a background on the URL relative layout to indicate that custom domain settings are being used.
+                urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.drawable.domain_settings_url_background, null));
             } else {
+                // Remove any background on the URL relative layout.
                 urlRelativeLayout.setBackground(ResourcesCompat.getDrawable(getResources(), R.color.transparent, null));
             }
         } else {  // The fragment has not been populated.  Try again in 100 milliseconds.
@@ -5220,6 +5005,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         }
     }
 
+    @SuppressLint("ClickableViewAccessibility")
     @Override
     public void initializeWebView(NestedScrollWebView nestedScrollWebView, int pageNumber, ProgressBar progressBar, String url, Boolean restoringState) {
         // Get a handle for the shared preferences.
@@ -5275,11 +5061,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Remove the lint warning below that the input method manager might be null.
         assert inputMethodManager != null;
 
-        // Initialize the favorite icon.
-        nestedScrollWebView.initializeFavoriteIcon();
-
         // Set the app bar scrolling.
-        nestedScrollWebView.setNestedScrollingEnabled(sharedPreferences.getBoolean("scroll_app_bar", true));
+        nestedScrollWebView.setNestedScrollingEnabled(scrollAppBar);
 
         // Allow pinch to zoom.
         nestedScrollWebView.getSettings().setBuiltInZoomControls(true);
@@ -5288,9 +5071,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         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);
-        }
+        nestedScrollWebView.getSettings().setMixedContentMode(WebSettings.MIXED_CONTENT_NEVER_ALLOW);
 
         // Set the WebView to load in overview mode (zoomed out to the maximum width).
         nestedScrollWebView.getSettings().setLoadWithOverviewMode(true);
@@ -5298,6 +5079,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Explicitly disable geolocation.
         nestedScrollWebView.getSettings().setGeolocationEnabled(false);
 
+        // Allow loading of file:// URLs.  This is necessary for opening MHT web archives, which are copies into a temporary cache location.
+        nestedScrollWebView.getSettings().setAllowFileAccess(true);
+
         // 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.
@@ -5320,31 +5104,25 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                             // Hide the action bar.
                             actionBar.hide();
 
-                            // Check to see if the app bar is normally scrolled.
-                            if (scrollAppBar) {  // The app bar is scrolled when it is displayed.
-                                // Get the swipe refresh layout parameters.
-                                CoordinatorLayout.LayoutParams swipeRefreshLayoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
-
-                                // Remove the off-screen scrolling layout.
-                                swipeRefreshLayoutParams.setBehavior(null);
-                            } else {  // The app bar is not scrolled when it is displayed.
-                                // Remove the padding from the top of the swipe refresh layout.
-                                swipeRefreshLayout.setPadding(0, 0, 0, 0);
-
-                                // The swipe refresh circle must be moved above the now removed status bar location.
-                                swipeRefreshLayout.setProgressViewOffset(false, -200, defaultProgressViewEndOffset);
+                            // Set layout and scrolling parameters if the app bar is at the top of the screen.
+                            if (!bottomAppBar) {
+                                // Check to see if the app bar is normally scrolled.
+                                if (scrollAppBar) {  // The app bar is scrolled when it is displayed.
+                                    // Get the swipe refresh layout parameters.
+                                    CoordinatorLayout.LayoutParams swipeRefreshLayoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
+
+                                    // Remove the off-screen scrolling layout.
+                                    swipeRefreshLayoutParams.setBehavior(null);
+                                } else {  // The app bar is not scrolled when it is displayed.
+                                    // Remove the padding from the top of the swipe refresh layout.
+                                    swipeRefreshLayout.setPadding(0, 0, 0, 0);
+
+                                    // The swipe refresh circle must be moved above the now removed status bar location.
+                                    swipeRefreshLayout.setProgressViewOffset(false, -200, defaultProgressViewEndOffset);
+                                }
                             }
                         }
 
-                        // Hide the banner ad in the free flavor.
-                        if (BuildConfig.FLAVOR.contentEquals("free")) {
-                            // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-                            View adView = findViewById(R.id.adview);
-
-                            // Hide the banner ad.
-                            AdHelper.hideAd(adView);
-                        }
-
                         /* Hide the system bars.
                          * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
                          * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
@@ -5362,31 +5140,25 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                             // Show the action bar.
                             actionBar.show();
 
-                            // Check to see if the app bar is normally scrolled.
-                            if (scrollAppBar) {  // The app bar is scrolled when it is displayed.
-                                // Get the swipe refresh layout parameters.
-                                CoordinatorLayout.LayoutParams swipeRefreshLayoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
-
-                                // Add the off-screen scrolling layout.
-                                swipeRefreshLayoutParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());
-                            } else {  // The app bar is not scrolled when it is displayed.
-                                // The swipe refresh layout must be manually moved below the app bar layout.
-                                swipeRefreshLayout.setPadding(0, appBarHeight, 0, 0);
-
-                                // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
-                                swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10 + appBarHeight, defaultProgressViewEndOffset + appBarHeight);
+                            // Set layout and scrolling parameters if the app bar is at the top of the screen.
+                            if (!bottomAppBar) {
+                                // Check to see if the app bar is normally scrolled.
+                                if (scrollAppBar) {  // The app bar is scrolled when it is displayed.
+                                    // Get the swipe refresh layout parameters.
+                                    CoordinatorLayout.LayoutParams swipeRefreshLayoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
+
+                                    // Add the off-screen scrolling layout.
+                                    swipeRefreshLayoutParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());
+                                } else {  // The app bar is not scrolled when it is displayed.
+                                    // The swipe refresh layout must be manually moved below the app bar layout.
+                                    swipeRefreshLayout.setPadding(0, appBarHeight, 0, 0);
+
+                                    // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
+                                    swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10 + appBarHeight, defaultProgressViewEndOffset + appBarHeight);
+                                }
                             }
                         }
 
-                        // Show the banner ad in the free flavor.
-                        if (BuildConfig.FLAVOR.contentEquals("free")) {
-                            // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-                            View adView = findViewById(R.id.adview);
-
-                            // Reload the ad.  `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
-                            AdHelper.loadAd(adView, getApplicationContext(), activity, getString(R.string.ad_unit_id));
-                        }
-
                         // Remove the `SYSTEM_UI` flags from the root frame layout.
                         rootFrameLayout.setSystemUiVisibility(0);
                     }
@@ -5413,27 +5185,38 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // Allow the downloading of files.
         nestedScrollWebView.setDownloadListener((String downloadUrl, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
-            // Define a formatted file size string.
-            String formattedFileSizeString;
-
-            // Process the content length if it contains data.
-            if (contentLength > 0) {  // The content length is greater than 0.
-                // Format the content length as a string.
-                formattedFileSizeString = NumberFormat.getInstance().format(contentLength) + " " + getString(R.string.bytes);
-            } else {  // The content length is not greater than 0.
-                // Set the formatted file size string to be `unknown size`.
-                formattedFileSizeString = getString(R.string.unknown_size);
-            }
+            // Check the download preference.
+            if (downloadWithExternalApp) {  // Download with an external app.
+                downloadUrlWithExternalApp(downloadUrl);
+            } else {  // Handle the download inside of Privacy Browser.
+                // Define a formatted file size string.
+                String formattedFileSizeString;
+
+                // Process the content length if it contains data.
+                if (contentLength > 0) {  // The content length is greater than 0.
+                    // Format the content length as a string.
+                    formattedFileSizeString = NumberFormat.getInstance().format(contentLength) + " " + getString(R.string.bytes);
+                } else {  // The content length is not greater than 0.
+                    // Set the formatted file size string to be `unknown size`.
+                    formattedFileSizeString = getString(R.string.unknown_size);
+                }
 
-            // Get the file name from the content disposition.
-            String fileNameString = PrepareSaveDialog.getFileNameFromHeaders(this, contentDisposition, mimetype, downloadUrl);
+                // Get the file name from the content disposition.
+                String fileNameString = PrepareSaveDialog.getFileNameFromHeaders(this, contentDisposition, mimetype, downloadUrl);
 
-            // Instantiate the save dialog.
-            DialogFragment saveDialogFragment = SaveWebpageDialog.saveWebpage(StoragePermissionDialog.SAVE_URL, downloadUrl, formattedFileSizeString, fileNameString, userAgent,
-                    nestedScrollWebView.getAcceptFirstPartyCookies());
+                // Instantiate the save dialog.
+                DialogFragment saveDialogFragment = SaveDialog.saveUrl(downloadUrl, formattedFileSizeString, fileNameString, userAgent,
+                        nestedScrollWebView.getAcceptCookies());
 
-            // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
-            saveDialogFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
+                // Try to show the dialog.  The download listener continues to function even when the WebView is paused.  Attempting to display a dialog in that state leads to a crash.
+                try {
+                    // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
+                    saveDialogFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
+                } catch (Exception exception) {  // The dialog could not be shown.
+                    // Add the dialog to the pending dialog array list.  It will be displayed in `onStart()`.
+                    pendingDialogsArrayList.add(new PendingDialog(saveDialogFragment, getString(R.string.save_dialog)));
+                }
+            }
         });
 
         // Update the find on page count.
@@ -5460,55 +5243,46 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         });
 
         // Update the status of swipe to refresh based on the scroll position of the nested scroll WebView.  Also reinforce full screen browsing mode.
-        // On API < 23, `getViewTreeObserver().addOnScrollChangedListener()` must be used, but it is a little bit buggy and appears to get garbage collected from time to time.
-        if (Build.VERSION.SDK_INT >= 23) {
-            nestedScrollWebView.setOnScrollChangeListener((view, i, i1, i2, i3) -> {
-                if (nestedScrollWebView.getSwipeToRefresh()) {
-                    // Only enable swipe to refresh if the WebView is scrolled to the top.
-                    swipeRefreshLayout.setEnabled(nestedScrollWebView.getScrollY() == 0);
-                } else {
-                    // Disable swipe to refresh.
-                    swipeRefreshLayout.setEnabled(false);
-                }
+        nestedScrollWebView.setOnScrollChangeListener((view, scrollX, scrollY, oldScrollX, oldScrollY) -> {
+            // Set the swipe to refresh status.
+            if (nestedScrollWebView.getSwipeToRefresh()) {
+                // Only enable swipe to refresh if the WebView is scrolled to the top.
+                swipeRefreshLayout.setEnabled(nestedScrollWebView.getScrollY() == 0);
+            } else {
+                // Disable swipe to refresh.
+                swipeRefreshLayout.setEnabled(false);
+            }
 
-                // Reinforce the system UI visibility flags if in full screen browsing mode.
-                // This hides the status and navigation bars, which are displayed if other elements are shown, like dialog boxes, the options menu, or the keyboard.
-                if (inFullScreenBrowsingMode) {
-                    /* Hide the system bars.
-                     * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-                     * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
-                     * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-                     * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
-                     */
-                    rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
-                            View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-                }
-            });
-        } else {
-            nestedScrollWebView.getViewTreeObserver().addOnScrollChangedListener(() -> {
-                if (nestedScrollWebView.getSwipeToRefresh()) {
-                    // Only enable swipe to refresh if the WebView is scrolled to the top.
-                    swipeRefreshLayout.setEnabled(nestedScrollWebView.getScrollY() == 0);
-                } else {
-                    // Disable swipe to refresh.
-                    swipeRefreshLayout.setEnabled(false);
-                }
+            //  Scroll the bottom app bar if enabled.
+            if (bottomAppBar && scrollAppBar && !objectAnimator.isRunning()) {
+                if (scrollY < oldScrollY) {  // The WebView was scrolled down.
+                    // Animate the bottom app bar onto the screen.
+                    objectAnimator = ObjectAnimator.ofFloat(appBarLayout, "translationY", 0);
 
+                    // Make it so.
+                    objectAnimator.start();
+                } else if (scrollY > oldScrollY) {  // The WebView was scrolled up.
+                    // Animate the bottom app bar off the screen.
+                    objectAnimator = ObjectAnimator.ofFloat(appBarLayout, "translationY", appBarLayout.getHeight());
 
-                // Reinforce the system UI visibility flags if in full screen browsing mode.
-                // This hides the status and navigation bars, which are displayed if other elements are shown, like dialog boxes, the options menu, or the keyboard.
-                if (inFullScreenBrowsingMode) {
-                    /* Hide the system bars.
-                     * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-                     * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
-                     * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-                     * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
-                     */
-                    rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
-                            View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+                    // Make it so.
+                    objectAnimator.start();
                 }
-            });
-        }
+            }
+
+            // Reinforce the system UI visibility flags if in full screen browsing mode.
+            // This hides the status and navigation bars, which are displayed if other elements are shown, like dialog boxes, the options menu, or the keyboard.
+            if (inFullScreenBrowsingMode) {
+                /* Hide the system bars.
+                 * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                 * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                 * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                 * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                 */
+                rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                        View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+            }
+        });
 
         // Set the web chrome client.
         nestedScrollWebView.setWebChromeClient(new WebChromeClient() {
@@ -5602,20 +5376,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Set the full screen video flag.
                 displayingFullScreenVideo = true;
 
-                // Pause the ad if this is the free flavor.
-                if (BuildConfig.FLAVOR.contentEquals("free")) {
-                    // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-                    View adView = findViewById(R.id.adview);
-
-                    // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-                    AdHelper.pauseAd(adView);
-                }
-
                 // Hide the keyboard.
                 inputMethodManager.hideSoftInputFromWindow(nestedScrollWebView.getWindowToken(), 0);
 
-                // Hide the main content relative layout.
-                mainContentRelativeLayout.setVisibility(View.GONE);
+                // Hide the coordinator layout.
+                coordinatorLayout.setVisibility(View.GONE);
 
                 /* Hide the system bars.
                  * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
@@ -5642,98 +5407,38 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Exit full screen video.
             @Override
             public void onHideCustomView() {
-                // Re-enable the screen timeout.
-                fullScreenVideoFrameLayout.setKeepScreenOn(false);
-
-                // Unset the full screen video flag.
-                displayingFullScreenVideo = false;
-
-                // Remove all the views from the full screen video frame layout.
-                fullScreenVideoFrameLayout.removeAllViews();
-
-                // Hide the full screen video frame layout.
-                fullScreenVideoFrameLayout.setVisibility(View.GONE);
-
-                // Enable the sliding drawers.
-                drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
-
-                // Show the main content relative layout.
-                mainContentRelativeLayout.setVisibility(View.VISIBLE);
-
-                // Apply the appropriate full screen mode flags.
-                if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
-                    // Hide the app bar if specified.
-                    if (hideAppBar) {
-                        // Hide the tab linear layout.
-                        tabsLinearLayout.setVisibility(View.GONE);
-
-                        // Hide the action bar.
-                        actionBar.hide();
-                    }
-
-                    // Hide the banner ad in the free flavor.
-                    if (BuildConfig.FLAVOR.contentEquals("free")) {
-                        // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-                        View adView = findViewById(R.id.adview);
-
-                        // Hide the banner ad.
-                        AdHelper.hideAd(adView);
-                    }
-
-                    /* Hide the system bars.
-                     * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-                     * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
-                     * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-                     * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
-                     */
-                    rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
-                            View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-                } else {  // Switch to normal viewing mode.
-                    // Remove the `SYSTEM_UI` flags from the root frame layout.
-                    rootFrameLayout.setSystemUiVisibility(0);
-                }
-
-                // Reload the ad for the free flavor if not in full screen mode.
-                if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
-                    // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
-                    View adView = findViewById(R.id.adview);
-
-                    // Reload the ad.  `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
-                    AdHelper.loadAd(adView, getApplicationContext(), activity, getString(R.string.ad_unit_id));
-                }
+                // Exit the full screen video.
+                exitFullScreenVideo();
             }
 
             // Upload files.
             @Override
             public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
-                // Show the file chooser if the device is running API >= 21.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    // Store the file path callback.
-                    fileChooserCallback = filePathCallback;
+                // Store the file path callback.
+                fileChooserCallback = filePathCallback;
 
-                    // Create an intent to open a chooser based on the file chooser parameters.
-                    Intent fileChooserIntent = fileChooserParams.createIntent();
+                // Create an intent to open a chooser based on the file chooser parameters.
+                Intent fileChooserIntent = fileChooserParams.createIntent();
 
-                    // Get a handle for the package manager.
-                    PackageManager packageManager = getPackageManager();
+                // Get a handle for the package manager.
+                PackageManager packageManager = getPackageManager();
 
-                    // Check to see if the file chooser intent resolves to an installed package.
-                    if (fileChooserIntent.resolveActivity(packageManager) != null) {  // The file chooser intent is fine.
-                        // Start the file chooser intent.
-                        startActivityForResult(fileChooserIntent, BROWSE_FILE_UPLOAD_REQUEST_CODE);
-                    } else {  // The file chooser intent will cause a crash.
-                        // Create a generic intent to open a chooser.
-                        Intent genericFileChooserIntent = new Intent(Intent.ACTION_GET_CONTENT);
+                // Check to see if the file chooser intent resolves to an installed package.
+                if (fileChooserIntent.resolveActivity(packageManager) != null) {  // The file chooser intent is fine.
+                    // Start the file chooser intent.
+                    startActivityForResult(fileChooserIntent, BROWSE_FILE_UPLOAD_REQUEST_CODE);
+                } else {  // The file chooser intent will cause a crash.
+                    // Create a generic intent to open a chooser.
+                    Intent genericFileChooserIntent = new Intent(Intent.ACTION_GET_CONTENT);
 
-                        // Request an openable file.
-                        genericFileChooserIntent.addCategory(Intent.CATEGORY_OPENABLE);
+                    // Request an openable file.
+                    genericFileChooserIntent.addCategory(Intent.CATEGORY_OPENABLE);
 
-                        // Set the file type to everything.
-                        genericFileChooserIntent.setType("*/*");
+                    // Set the file type to everything.
+                    genericFileChooserIntent.setType("*/*");
 
-                        // Start the generic file chooser intent.
-                        startActivityForResult(genericFileChooserIntent, BROWSE_FILE_UPLOAD_REQUEST_CODE);
-                    }
+                    // Start the generic file chooser intent.
+                    startActivityForResult(genericFileChooserIntent, BROWSE_FILE_UPLOAD_REQUEST_CODE);
                 }
                 return true;
             }
@@ -5823,7 +5528,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             // Check requests against the block lists.  The deprecated `shouldInterceptRequest()` must be used until minimum API >= 21.
             @Override
-            public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
+            public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest webResourceRequest) {
+                // Get the URL.
+                String url = webResourceRequest.getUrl().toString();
+
                 // Check to see if the resource request is for the main URL.
                 if (url.equals(nestedScrollWebView.getCurrentUrl())) {
                     // `return null` loads the resource request, which should never be blocked if it is the main URL.
@@ -5843,9 +5551,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     }
                 }
 
-                // Sanitize the URL.
-                url = sanitizeUrl(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()));
 
@@ -5861,31 +5566,25 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Store a copy of the current domain for use in later requests.
                 String currentDomain = currentBaseDomain;
 
-                // Nobody is happy when comparing null strings.
-                if ((currentBaseDomain != null) && (url != null)) {
-                    // Convert the request URL to a URI.
-                    Uri requestUri = Uri.parse(url);
+                // Get the request host name.
+                String requestBaseDomain = webResourceRequest.getUrl().getHost();
 
-                    // Get the request host name.
-                    String requestBaseDomain = requestUri.getHost();
-
-                    // 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);
-                        }
-
-                        // 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);
-                        }
+                // 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);
+                    }
 
-                        // Update the third party request tracker.
-                        isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
+                    // Determine the request base domain.
+                    while (requestBaseDomain.indexOf(".", requestBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
+                        // Remove the first subdomain.
+                        requestBaseDomain = requestBaseDomain.substring(requestBaseDomain.indexOf(".") + 1);
                     }
+
+                    // Update the third party request tracker.
+                    isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
                 }
 
                 // Get the current WebView page position.
@@ -5895,7 +5594,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 boolean webViewDisplayed = (webViewPagePosition == tabLayout.getSelectedTabPosition());
 
                 // Block third-party requests if enabled.
-                if (isThirdPartyRequest && nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS)) {
+                if (isThirdPartyRequest && nestedScrollWebView.getBlockAllThirdPartyRequests()) {
                     // Add the result to the resource requests.
                     nestedScrollWebView.addResourceRequest(new String[]{BlocklistHelper.REQUEST_THIRD_PARTY, url});
 
@@ -5924,12 +5623,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 }
 
                 // Check UltraList if it is enabled.
-                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST)) {
+                if (nestedScrollWebView.getUltraListEnabled()) {
                     // Check the URL against UltraList.
                     String[] ultraListResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, ultraList);
 
                     // Process the UltraList results.
-                    if (ultraListResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched UltraLists's blacklist.
+                    if (ultraListResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched UltraList's blacklist.
                         // Add the result to the resource requests.
                         nestedScrollWebView.addResourceRequest(new String[] {ultraListResults[0], ultraListResults[1], ultraListResults[2], ultraListResults[3], ultraListResults[4], ultraListResults[5]});
 
@@ -5964,7 +5663,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 }
 
                 // Check UltraPrivacy if it is enabled.
-                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY)) {
+                if (nestedScrollWebView.getUltraPrivacyEnabled()) {
                     // Check the URL against UltraPrivacy.
                     String[] ultraPrivacyResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, ultraPrivacy);
 
@@ -6006,7 +5705,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 }
 
                 // Check EasyList if it is enabled.
-                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST)) {
+                if (nestedScrollWebView.getEasyListEnabled()) {
                     // Check the URL against EasyList.
                     String[] easyListResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyList);
 
@@ -6043,7 +5742,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 }
 
                 // Check EasyPrivacy if it is enabled.
-                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY)) {
+                if (nestedScrollWebView.getEasyPrivacyEnabled()) {
                     // Check the URL against EasyPrivacy.
                     String[] easyPrivacyResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyPrivacy);
 
@@ -6081,7 +5780,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 }
 
                 // Check Fanboy’s Annoyance List if it is enabled.
-                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST)) {
+                if (nestedScrollWebView.getFanboysAnnoyanceListEnabled()) {
                     // Check the URL against Fanboy's Annoyance List.
                     String[] fanboysAnnoyanceListResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList);
 
@@ -6118,7 +5817,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         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.
+                } else if (nestedScrollWebView.getFanboysSocialBlockingListEnabled()) {  // 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);
 
@@ -6183,25 +5882,25 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             @Override
             public void onPageStarted(WebView view, String url, Bitmap favicon) {
-                // Get the preferences.
-                boolean scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
-
-                // Set the top padding of the swipe refresh layout according to the app bar scrolling preference.  This can't be done in `appAppSettings()` because the app bar is not yet populated there.
-                if (scrollAppBar || (inFullScreenBrowsingMode && hideAppBar)) {
-                    // No padding is needed because it will automatically be placed below the app bar layout due to the scrolling layout behavior.
-                    swipeRefreshLayout.setPadding(0, 0, 0, 0);
-
-                    // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
-                    swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10, defaultProgressViewEndOffset);
-                } else {
-                    // Get the app bar layout height.  This can't be done in `applyAppSettings()` because the app bar is not yet populated there.
-                    appBarHeight = appBarLayout.getHeight();
-
-                    // The swipe refresh layout must be manually moved below the app bar layout.
-                    swipeRefreshLayout.setPadding(0, appBarHeight, 0, 0);
-
-                    // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
-                    swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10 + appBarHeight, defaultProgressViewEndOffset + appBarHeight);
+                // Set the padding and layout settings if the app bar is at the top of the screen.
+                if (!bottomAppBar) {
+                    // Set the top padding of the swipe refresh layout according to the app bar scrolling preference.  This can't be done in `appAppSettings()` because the app bar is not yet populated there.
+                    if (scrollAppBar || (inFullScreenBrowsingMode && hideAppBar)) {
+                        // No padding is needed because it will automatically be placed below the app bar layout due to the scrolling layout behavior.
+                        swipeRefreshLayout.setPadding(0, 0, 0, 0);
+
+                        // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
+                        swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10, defaultProgressViewEndOffset);
+                    } else {
+                        // Get the app bar layout height.  This can't be done in `applyAppSettings()` because the app bar is not yet populated there.
+                        appBarHeight = appBarLayout.getHeight();
+
+                        // The swipe refresh layout must be manually moved below the app bar layout.
+                        swipeRefreshLayout.setPadding(0, appBarHeight, 0, 0);
+
+                        // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
+                        swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10 + appBarHeight, defaultProgressViewEndOffset + appBarHeight);
+                    }
                 }
 
                 // Reset the list of resource requests.
@@ -6218,7 +5917,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // Display the formatted URL text.
                     urlEditText.setText(url);
 
-                    // Apply text highlighting to `urlTextBox`.
+                    // Apply text highlighting to the URL text box.
                     highlightUrlText();
 
                     // Hide the keyboard.
@@ -6226,7 +5925,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 }
 
                 // Reset the list of host IP addresses.
-                nestedScrollWebView.clearCurrentIpAddresses();
+                nestedScrollWebView.setCurrentIpAddresses("");
 
                 // Get a URI for the current URL.
                 Uri currentUri = Uri.parse(url);
@@ -6242,17 +5941,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // Get the app bar and theme preferences.
                     boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean(getString(R.string.display_additional_app_bar_icons_key), false);
 
-                    // If the icon is displayed in the AppBar, set it according to the theme.
+                    // Set the icon if it is displayed in the AppBar.  Once the minimum API is >= 26, the blue and black icons can be combined with a tint list.
                     if (displayAdditionalAppBarIcons) {
-                        // Get the current theme status.
-                        int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
-
-                        // Set the stop icon according to the theme.
-                        if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
-                            optionsRefreshMenuItem.setIcon(R.drawable.close_blue_day);
-                        } else {
-                            optionsRefreshMenuItem.setIcon(R.drawable.close_blue_night);
-                        }
+                        optionsRefreshMenuItem.setIcon(R.drawable.close_blue);
                     }
                 }
             }
@@ -6260,7 +5951,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             @Override
             public void onPageFinished(WebView view, String url) {
                 // Flush any cookies to persistent storage.  The cookie manager has become very lazy about flushing cookies in recent versions.
-                if (nestedScrollWebView.getAcceptFirstPartyCookies() && Build.VERSION.SDK_INT >= 21) {
+                if (nestedScrollWebView.getAcceptCookies()) {
                     CookieManager.getInstance().flush();
                 }
 
@@ -6274,15 +5965,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                     // If the icon is displayed in the app bar, reset it according to the theme.
                     if (displayAdditionalAppBarIcons) {
-                        // Get the current theme status.
-                        int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
-
-                        // Set the icon according to the theme.
-                        if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
-                            optionsRefreshMenuItem.setIcon(R.drawable.refresh_enabled_day);
-                        } else {
-                            optionsRefreshMenuItem.setIcon(R.drawable.refresh_enabled_night);
-                        }
+                        // Set the icon.
+                        optionsRefreshMenuItem.setIcon(R.drawable.refresh_enabled);
                     }
                 }
 
@@ -6391,7 +6075,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 }
             }
 
-            // Handle SSL Certificate errors.
+            // Handle SSL Certificate errors.  Suppress the lint warning that ignoring the error might be dangerous.
+            @SuppressLint("WebViewClientOnReceivedSslError")
             @Override
             public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
                 // Get the current website SSL certificate.
@@ -6432,8 +6117,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // Instantiate an SSL certificate error alert dialog.
                     DialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error, nestedScrollWebView.getWebViewFragmentId());
 
-                    // Show the SSL certificate error dialog.
-                    sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
+                    // Try to show the dialog.  The SSL error handler continues to function even when the WebView is paused.  Attempting to display a dialog in that state leads to a crash.
+                    try {
+                        // Show the SSL certificate error dialog.
+                        sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
+                    } catch (Exception exception) {
+                        // Add the dialog to the pending dialog array list.  It will be displayed in `onStart()`.
+                        pendingDialogsArrayList.add(new PendingDialog(sslCertificateErrorDialogFragment, getString(R.string.ssl_certificate_error)));
+                    }
                 }
             }
         });