Bug 1813875 - Prevent the inherited theming implementation being applied to Custom Tab views

app/src/main/java/org/mozilla/fenix/HomeActivity.kt

@@ -233,8 +233,10 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
 
         // There is disk read violations on some devices such as samsung and pixel for android 9/10
         components.strictMode.resetAfter(StrictMode.allowThreadDiskReads()) {
-            // Theme setup should always be called before super.onCreate
+            // Browsing mode & theme setup should always be called before super.onCreate.
-            setupThemeAndBrowsingMode(getModeFromIntentOrLastKnown(intent))
+            setupBrowsingMode(getModeFromIntentOrLastKnown(intent))
+            setupTheme()
+
             super.onCreate(savedInstanceState)
         }
 
@@ -870,12 +872,18 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         return false
     }
 
-    private fun setupThemeAndBrowsingMode(mode: BrowsingMode) {
+    private fun setupBrowsingMode(mode: BrowsingMode) {
         settings().lastKnownMode = mode
         browsingModeManager = createBrowsingModeManager(mode)
+    }
+
+    private fun setupTheme() {
         themeManager = createThemeManager()
-        themeManager.setActivityTheme(this)
+        // ExternalAppBrowserActivity handles it's own theming as it can be customized.
-        themeManager.applyStatusBarTheme(this)
+        if (this !is ExternalAppBrowserActivity) {
+            themeManager.setActivityTheme(this)
+            themeManager.applyStatusBarTheme(this)
+        }
     }
 
     // Stop active media when activity is destroyed.

app/src/main/java/org/mozilla/fenix/browser/BaseBrowserFragment.kt

@@ -13,7 +13,6 @@ import android.os.Build
 import android.os.Bundle
 import android.provider.Settings
 import android.util.Log
-import android.view.Gravity
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -138,6 +137,7 @@ import org.mozilla.fenix.components.toolbar.ToolbarIntegration
 import org.mozilla.fenix.components.toolbar.interactor.BrowserToolbarInteractor
 import org.mozilla.fenix.components.toolbar.interactor.DefaultBrowserToolbarInteractor
 import org.mozilla.fenix.crashes.CrashContentIntegration
+import org.mozilla.fenix.customtabs.ExternalAppBrowserActivity
 import org.mozilla.fenix.databinding.FragmentBrowserBinding
 import org.mozilla.fenix.downloads.DynamicDownloadDialog
 import org.mozilla.fenix.downloads.FirstPartyDownloadDialog
@@ -266,7 +266,11 @@ abstract class BaseBrowserFragment :
         _binding = FragmentBrowserBinding.inflate(inflater, container, false)
 
         val activity = activity as HomeActivity
-        activity.themeManager.applyStatusBarTheme(activity)
+        // ExternalAppBrowserActivity handles it's own theming as it can be customized.
+        if (activity !is ExternalAppBrowserActivity) {
+            activity.themeManager.applyStatusBarTheme(activity)
+        }
+
         val originalContext = ActivityContextWrapper.getOriginalContext(activity)
         binding.engineView.setActivityContext(originalContext)
 
@@ -1567,7 +1571,10 @@ abstract class BaseBrowserFragment :
             activity?.exitImmersiveMode()
             (view as? SwipeGestureLayout)?.isSwipeEnabled = true
             (activity as? HomeActivity)?.let { activity ->
-                activity.themeManager.applyStatusBarTheme(activity)
+                // ExternalAppBrowserActivity handles it's own theming as it can be customized.
+                if (activity !is ExternalAppBrowserActivity) {
+                    activity.themeManager.applyStatusBarTheme(activity)
+                }
             }
             if (webAppToolbarShouldBeVisible) {
                 browserToolbarView.view.isVisible = true