]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/activities/MainWebViewActivity.java
Change the default search engine to Searx. https://redmine.stoutner.com/issues/308
[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
index 491763787976d5bb006d17563341745d5c0a50a3..bbaff98dd8f74741f5ec9830e30f34588af1731d 100644 (file)
@@ -173,7 +173,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // and `ViewSslCertificateDialog`.  It is also used in `onCreate()`.
     public static SslCertificate sslCertificate;
 
-    // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`.
+    // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()` and `onResume()`.
     public static String orbotStatus;
 
     // `webViewTitle` is public static so it can be accessed from `CreateBookmarkDialog` and `CreateHomeScreenShortcutDialog`.  It is also used in `onCreate()`.
@@ -196,6 +196,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     public static String easyPrivacyVersion;
     public static String fanboysAnnoyanceVersion;
     public static String fanboysSocialVersion;
+    public static String ultraPrivacyVersion;
 
     // The request items are public static so they can be accessed by `BlockListHelper`, `RequestsArrayAdapter`, and `ViewRequestsDialog`.  They are also used in `onCreate()`.
     public static List<String[]> resourceRequests;
@@ -335,6 +336,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     private boolean easyPrivacyEnabled;
     private boolean fanboysAnnoyanceListEnabled;
     private boolean fanboysSocialBlockingListEnabled;
+    private boolean ultraPrivacyEnabled;
 
     // `privacyBrowserRuntime` is used in `onCreate()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
     private Runtime privacyBrowserRuntime;
@@ -363,13 +365,16 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `reapplyAppSettingsOnRestart` is used in `onNavigationItemSelected()` and `onRestart()`.
     private boolean reapplyAppSettingsOnRestart;
 
+    // `displayingFullScreenVideo` is used in `onCreate()` and `onResume()`.
+    private boolean displayingFullScreenVideo;
+
     // `currentDomainName` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onAddDomain()`, and `applyDomainSettings()`.
     private String currentDomainName;
 
     // `ignorePinnedSslCertificateForDomain` is used in `onCreate()`, `onSslMismatchProceed()`, and `applyDomainSettings()`.
     private boolean ignorePinnedSslCertificate;
 
-    // `waitingForOrbot` is used in `onCreate()` and `applyAppSettings()`.
+    // `waitingForOrbot` is used in `onCreate()`, `onResume()`, and `applyAppSettings()`.
     private boolean waitingForOrbot;
 
     // `domainSettingsApplied` is used in `prepareOptionsMenu()`, `applyDomainSettings()`, and `setDisplayWebpageImages()`.
@@ -986,6 +991,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Enter full screen video.
             @Override
             public void onShowCustomView(View view, CustomViewCallback callback) {
+                // Set the full screen video flag.
+                displayingFullScreenVideo = true;
+
                 // Pause the ad if this is the free flavor.
                 if (BuildConfig.FLAVOR.contentEquals("free")) {
                     // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
@@ -1018,6 +1026,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Exit full screen video.
             @Override
             public void onHideCustomView() {
+                // Unset the full screen video flag.
+                displayingFullScreenVideo = true;
+
                 // Hide `fullScreenVideoFrameLayout`.
                 fullScreenVideoFrameLayout.removeAllViews();
                 fullScreenVideoFrameLayout.setVisibility(View.GONE);
@@ -1025,11 +1036,62 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Enable the sliding drawers.
                 drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 
-                // Add the translucent status flag.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
-                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+                // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
+                if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
+                    if (hideSystemBarsOnFullscreen) {  // Hide everything.
+                        // Remove the translucent navigation setting if it is currently flagged.
+                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+
+                        // Remove the translucent status bar overlay.
+                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+
+                        // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
+                        drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
+
+                        /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                         * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                         * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                         */
+                        rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+                    } else {  // Hide everything except the status and navigation bars.
+                        // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
+                        rootCoordinatorLayout.setSystemUiVisibility(0);
+
+                        // Add the translucent status flag if it is unset.
+                        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
-                // Set `rootCoordinatorLayout` to fit inside the status and navigation bars.  This also clears the `SYSTEM_UI` flags.
-                rootCoordinatorLayout.setFitsSystemWindows(true);
+                        if (translucentNavigationBarOnFullscreen) {
+                            // Set the navigation bar to be translucent.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
+                            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+                        } else {
+                            // Set the navigation bar to be black.
+                            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+                        }
+                    }
+                } else {  // Switch to normal viewing mode.
+                    // Show the `appBar` if `findOnPageLinearLayout` is not visible.
+                    if (findOnPageLinearLayout.getVisibility() == View.GONE) {
+                        appBar.show();
+                    }
+
+                    // Show the `BannerAd` in the free flavor.
+                    if (BuildConfig.FLAVOR.contentEquals("free")) {
+                        // Initialize the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
+                        AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getFragmentManager(), getString(R.string.ad_id));
+                    }
+
+                    // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
+                    rootCoordinatorLayout.setSystemUiVisibility(0);
+
+                    // Remove the translucent navigation bar flag if it is set.
+                    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
+
+                    // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
+                    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+
+                    // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
+                    rootCoordinatorLayout.setFitsSystemWindows(true);
+                }
 
                 // Show the ad if this is the free flavor.
                 if (BuildConfig.FLAVOR.contentEquals("free")) {
@@ -1175,12 +1237,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         final ArrayList<List<String[]>> easyPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/easyprivacy.txt");
         final ArrayList<List<String[]>> fanboysAnnoyanceList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-annoyance.txt");
         final ArrayList<List<String[]>> fanboysSocialList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-social.txt");
+        final ArrayList<List<String[]>> ultraPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/ultraprivacy.txt");
 
         // Store the list versions.
         easyListVersion = easyList.get(0).get(0)[0];
         easyPrivacyVersion = easyPrivacy.get(0).get(0)[0];
         fanboysAnnoyanceVersion = fanboysAnnoyanceList.get(0).get(0)[0];
         fanboysSocialVersion = fanboysSocialList.get(0).get(0)[0];
+        ultraPrivacyVersion = ultraPrivacy.get(0).get(0)[0];
 
         mainWebView.setWebViewClient(new WebViewClient() {
             // `shouldOverrideUrlLoading` makes this `WebView` the default handler for URLs inside the app, so that links are not kicked out to other apps.
@@ -1189,6 +1253,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             @Override
             public boolean shouldOverrideUrlLoading(WebView view, String url) {
                 if (url.startsWith("http")) {  // Load the URL in Privacy Browser.
+                    // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
+                    formattedUrlString = "";
+
                     // Apply the domain settings for the new URL.  `applyDomainSettings` doesn't do anything if the domain has not changed.
                     applyDomainSettings(url, true, false);
 
@@ -1256,13 +1323,13 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Create an empty web resource response to be used if the resource request is blocked.
                 WebResourceResponse emptyWebResourceResponse = new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
 
-                // Reset `whiteListResultStringArray`.
+                // Reset the whitelist results tracker.
                 whiteListResultStringArray = null;
 
                 // Initialize the third party request tracker.
                 boolean isThirdPartyRequest = false;
 
-                //
+                // Initialize the current domain string.
                 String currentDomain = "";
 
                 // Nobody is happy when comparing null strings.
@@ -1306,9 +1373,29 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     return emptyWebResourceResponse;
                 }
 
+                // Check UltraPrivacy if it is enabled.
+                if (ultraPrivacyEnabled) {
+                    if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, ultraPrivacy)) {
+                        // The resource request was blocked.  Return an empty web resource response.
+                        return emptyWebResourceResponse;
+                    }
+
+                    // If the whitelist result is not null, the request has been allowed by UltraPrivacy.
+                    if (whiteListResultStringArray != null) {
+                        // Add a whitelist entry to the resource requests array.
+                        resourceRequests.add(whiteListResultStringArray);
+
+                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
+                        return null;
+                    }
+                }
+
                 // Check EasyList if it is enabled.
                 if (easyListEnabled) {
                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyList)) {
+                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
+                        whiteListResultStringArray = null;
+
                         // The resource request was blocked.  Return an empty web resource response.
                         return emptyWebResourceResponse;
                     }
@@ -1317,6 +1404,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Check EasyPrivacy if it is enabled.
                 if (easyPrivacyEnabled) {
                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyPrivacy)) {
+                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
+                        whiteListResultStringArray = null;
+
                         // The resource request was blocked.  Return an empty web resource response.
                         return emptyWebResourceResponse;
                     }
@@ -1325,11 +1415,17 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Check Fanboy’s Annoyance List if it is enabled.
                 if (fanboysAnnoyanceListEnabled) {
                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList)) {
+                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
+                        whiteListResultStringArray = null;
+
                         // The resource request was blocked.  Return an empty web resource response.
                         return emptyWebResourceResponse;
                     }
                 } else if (fanboysSocialBlockingListEnabled){  // Only check Fanboy’s Social Blocking List if Fanboy’s Annoyance List is disabled.
                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysSocialList)) {
+                        // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
+                        whiteListResultStringArray = null;
+
                         // The resource request was blocked.  Return an empty web resource response.
                         return emptyWebResourceResponse;
                     }
@@ -1384,6 +1480,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                     // Apply any custom domain settings if the URL was loaded by navigating history.
                     if (navigatingHistory) {
+                        // Reset `navigatingHistory`.
+                        navigatingHistory = false;
+
+                        // Apply the domain settings.
                         applyDomainSettings(url, true, false);
                     }
 
@@ -1673,26 +1773,46 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // Resume the adView for the free flavor.
         if (BuildConfig.FLAVOR.contentEquals("free")) {
-            // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
+            // Resume the ad.
             AdHelper.resumeAd(findViewById(R.id.adview));
         }
+
+        // Display a message to the user if waiting for Orbot.
+        if (waitingForOrbot && !orbotStatus.equals("ON")) {
+            // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
+            mainWebView.loadData(waitingForOrbotHTMLString, "text/html", null);
+        }
+
+        if (displayingFullScreenVideo) {
+            // Remove the translucent overlays.
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+
+            // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
+            drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
+
+            /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+             */
+            rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+        }
     }
 
     @Override
     public void onPause() {
+        super.onPause();
+
         // Pause `mainWebView`.
         mainWebView.onPause();
 
         // Stop all JavaScript.
         mainWebView.pauseTimers();
 
-        // Pause the adView or it will continue to consume resources in the background on the free flavor.
+        // Pause the ad or it will continue to consume resources in the background on the free flavor.
         if (BuildConfig.FLAVOR.contentEquals("free")) {
-            // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
+            // Pause the ad.
             AdHelper.pauseAd(findViewById(R.id.adview));
         }
-
-        super.onPause();
     }
 
     @Override
@@ -1758,6 +1878,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         MenuItem easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
         MenuItem fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
         MenuItem fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
+        MenuItem ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
         MenuItem blockAllThirdParyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
         MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
@@ -1779,6 +1900,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         easyPrivacyMenuItem.setChecked(easyPrivacyEnabled);
         fanboysAnnoyanceListMenuItem.setChecked(fanboysAnnoyanceListEnabled);
         fanboysSocialBlockingListMenuItem.setChecked(fanboysSocialBlockingListEnabled);
+        ultraPrivacyMenuItem.setChecked(ultraPrivacyEnabled);
         blockAllThirdParyRequestsMenuItem.setChecked(blockAllThirdPartyRequests);
         swipeToRefreshMenuItem.setChecked(swipeRefreshLayout.isEnabled());
         displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
@@ -2256,6 +2378,17 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 mainWebView.reload();
                 return true;
 
+            case R.id.ultraprivacy:
+                // Toggle the UltraPrivacy status.
+                ultraPrivacyEnabled = !ultraPrivacyEnabled;
+
+                // Update the menu checkbox.
+                menuItem.setChecked(ultraPrivacyEnabled);
+
+                // Reload the main WebView.
+                mainWebView.reload();
+                return true;
+
             case R.id.block_all_third_party_requests:
                 //Toggle the third-party requests blocker status.
                 blockAllThirdPartyRequests = !blockAllThirdPartyRequests;
@@ -2350,6 +2483,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             case R.id.back:
                 if (mainWebView.canGoBack()) {
+                    // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
+                    formattedUrlString = "";
+
                     // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
                     navigatingHistory = true;
 
@@ -2360,6 +2496,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             case R.id.forward:
                 if (mainWebView.canGoForward()) {
+                    // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
+                    formattedUrlString = "";
+
                     // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
                     navigatingHistory = true;
 
@@ -2564,7 +2703,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     public void onConfigurationChanged(Configuration newConfig) {
         super.onConfigurationChanged(newConfig);
 
-        // Reload the ad for the free flavor if we are not in full screen mode.
+        // Reload the ad for the free flavor if we not in full screen mode.
         if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
             // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
             AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_id));
@@ -3193,6 +3332,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     @Override
     public void onSslMismatchBack() {
         if (mainWebView.canGoBack()) {  // There is a back page in the history.
+            // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
+            formattedUrlString = "";
+
             // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
             navigatingHistory = true;
 
@@ -3212,6 +3354,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
     @Override
     public void onUrlHistoryEntrySelected(int moveBackOrForwardSteps) {
+        // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
+        formattedUrlString = "";
+
         // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
         navigatingHistory = true;
 
@@ -3244,6 +3389,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             }
 
         } else if (mainWebView.canGoBack()) {  // There is at least one item in the `WebView` history.
+            // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
+            formattedUrlString = "";
+
             // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
             navigatingHistory = true;
 
@@ -3363,11 +3511,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
         // Store the values from the shared preferences in variables.
-        String homepageString = sharedPreferences.getString("homepage", "https://start.duckduckgo.com");
-        String torHomepageString = sharedPreferences.getString("tor_homepage", "https://3g2upl4pq6kufc4m.onion");
-        String torSearchString = sharedPreferences.getString("tor_search", "https://3g2upl4pq6kufc4m.onion/html/?q=");
+        String homepageString = sharedPreferences.getString("homepage", "https://searx.me/");
+        String torHomepageString = sharedPreferences.getString("tor_homepage", "http://ulrn6sryqaifefld.onion/");
+        String torSearchString = sharedPreferences.getString("tor_search", "http://ulrn6sryqaifefld.onion/?q=");
         String torSearchCustomURLString = sharedPreferences.getString("tor_search_custom_url", "");
-        String searchString = sharedPreferences.getString("search", "https://duckduckgo.com/html/?q=");
+        String searchString = sharedPreferences.getString("search", "https://searx.me/?q=");
         String searchCustomURLString = sharedPreferences.getString("search_custom_url", "");
         incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
         boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
@@ -3404,7 +3552,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.blue_50));
             }
 
-            // Display a message to the user if we are waiting on Orbot.
+            // Display a message to the user if waiting for Orbot.
             if (!orbotStatus.equals("ON")) {
                 // Set `waitingForOrbot`.
                 waitingForOrbot = true;
@@ -3450,7 +3598,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         }
 
         // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
-        if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {
+        if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
             if (hideSystemBarsOnFullscreen) {  // Hide everything.
                 // Remove the translucent navigation setting if it is currently flagged.
                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
@@ -3467,6 +3615,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                  */
                 rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
             } else {  // Hide everything except the status and navigation bars.
+                // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
+                rootCoordinatorLayout.setSystemUiVisibility(0);
+
                 // Add the translucent status flag if it is unset.
                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
@@ -3478,8 +3629,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
                 }
             }
-        } else {  // Switch to normal viewing mode.
-            // Reset `inFullScreenBrowsingMode` to `false`.
+        } else {  // Privacy Browser is not in full screen browsing mode.
+            // Reset the full screen tracker, which could be true if Privacy Browser was in full screen mode before entering settings and full screen browsing was disabled.
             inFullScreenBrowsingMode = false;
 
             // Show the `appBar` if `findOnPageLinearLayout` is not visible.
@@ -3493,15 +3644,15 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getFragmentManager(), getString(R.string.ad_id));
             }
 
+            // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
+            rootCoordinatorLayout.setSystemUiVisibility(0);
+
             // Remove the translucent navigation bar flag if it is set.
             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
 
             // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
             getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
-            // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
-            rootCoordinatorLayout.setSystemUiVisibility(0);
-
             // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
             rootCoordinatorLayout.setFitsSystemWindows(true);
         }
@@ -3511,9 +3662,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // The deprecated `.getDrawable()` must be used until the minimum API >= 21.
     @SuppressWarnings("deprecation")
     private void applyDomainSettings(String url, boolean resetFavoriteIcon, boolean reloadWebsite) {
-        // Reset `navigatingHistory`.
-        navigatingHistory = false;
-
         // Parse the URL into a URI.
         Uri uri = Uri.parse(url);
 
@@ -3628,6 +3776,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 easyPrivacyEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYPRIVACY)) == 1);
                 fanboysAnnoyanceListEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_ANNOYANCE_LIST)) == 1);
                 fanboysSocialBlockingListEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_SOCIAL_BLOCKING_LIST)) == 1);
+                ultraPrivacyEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_ULTRAPRIVACY)) == 1);
                 blockAllThirdPartyRequests = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.BLOCK_ALL_THIRD_PARTY_REQUESTS)) == 1);
                 String userAgentName = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.USER_AGENT));
                 int fontSize = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE));
@@ -3784,6 +3933,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 easyPrivacyEnabled = sharedPreferences.getBoolean("easyprivacy", true);
                 fanboysAnnoyanceListEnabled = sharedPreferences.getBoolean("fanboy_annoyance_list", true);
                 fanboysSocialBlockingListEnabled = sharedPreferences.getBoolean("fanboy_social_blocking_list", true);
+                ultraPrivacyEnabled = sharedPreferences.getBoolean("ultraprivacy", true);
                 blockAllThirdPartyRequests = sharedPreferences.getBoolean("block_all_third_party_requests", false);
 
                 // Set `javaScriptEnabled` to be `true` if `night_mode` is `true`.