diff --git a/fenix/app/src/main/java/org/mozilla/fenix/HomeActivity.kt b/fenix/app/src/main/java/org/mozilla/fenix/HomeActivity.kt
index d54d9d691449..eaa4d725a0b3 100644
--- a/fenix/app/src/main/java/org/mozilla/fenix/HomeActivity.kt
+++ b/fenix/app/src/main/java/org/mozilla/fenix/HomeActivity.kt
@@ -517,7 +517,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         components.core.store.dispatch(SearchAction.RefreshSearchEnginesAction)
     }
 
-    override fun onStart() {
+    final override fun onStart() {
         // DO NOT MOVE ANYTHING ABOVE THIS getProfilerTime CALL.
         val startProfilerTime = components.core.engine.profiler?.getProfilerTime()
 
@@ -537,7 +537,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         ) // DO NOT MOVE ANYTHING BELOW THIS addMarker CALL.
     }
 
-    override fun onStop() {
+    final override fun onStop() {
         super.onStop()
 
         // Diagnostic breadcrumb for "Display already aquired" crash:
@@ -593,6 +593,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         outContent?.webUri = currentTabUrl?.let { Uri.parse(it) }
     }
 
+    @CallSuper
     override fun onDestroy() {
         super.onDestroy()
 
@@ -616,7 +617,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         }
     }
 
-    override fun onConfigurationChanged(newConfig: Configuration) {
+    final override fun onConfigurationChanged(newConfig: Configuration) {
         super.onConfigurationChanged(newConfig)
 
         // Diagnostic breadcrumb for "Display already aquired" crash:
@@ -626,7 +627,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         )
     }
 
-    override fun recreate() {
+    final override fun recreate() {
         // Diagnostic breadcrumb for "Display already aquired" crash:
         // https://github.com/mozilla-mobile/android-components/issues/7960
         breadcrumb(
@@ -711,12 +712,12 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         else -> super.onCreateView(parent, name, context, attrs)
     }
 
-    override fun onActionModeStarted(mode: ActionMode?) {
+    final override fun onActionModeStarted(mode: ActionMode?) {
         actionMode = mode
         super.onActionModeStarted(mode)
     }
 
-    override fun onActionModeFinished(mode: ActionMode?) {
+    final override fun onActionModeFinished(mode: ActionMode?) {
         actionMode = null
         super.onActionModeFinished(mode)
     }
@@ -783,7 +784,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         return false
     }
 
-    override fun dispatchTouchEvent(ev: MotionEvent?): Boolean {
+    final override fun dispatchTouchEvent(ev: MotionEvent?): Boolean {
         ProfilerMarkers.addForDispatchTouchEvent(components.core.engine.profiler, ev)
         return super.dispatchTouchEvent(ev)
     }
@@ -844,6 +845,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
      * private mode directly before the content view is created. Returns the mode set by the intent
      * otherwise falls back to the last known mode.
      */
+    @VisibleForTesting
     internal fun getModeFromIntentOrLastKnown(intent: Intent?): BrowsingMode {
         intent?.toSafeIntent()?.let {
             if (it.hasExtra(PRIVATE_BROWSING_MODE)) {
@@ -896,7 +898,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
      * Returns the [supportActionBar], inflating it if necessary.
      * Everyone should call this instead of supportActionBar.
      */
-    override fun getSupportActionBarAndInflateIfNecessary(): ActionBar {
+    final override fun getSupportActionBarAndInflateIfNecessary(): ActionBar {
         if (!isToolbarInflated) {
             navigationToolbar = binding.navigationToolbarStub.inflate() as Toolbar
 
@@ -911,7 +913,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
     }
 
     @Suppress("SpreadOperator")
-    fun setupNavigationToolbar(vararg topLevelDestinationIds: Int) {
+    private fun setupNavigationToolbar(vararg topLevelDestinationIds: Int) {
         NavigationUI.setupWithNavController(
             navigationToolbar,
             navHost.navController,
@@ -1094,13 +1096,13 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         navController.navigate(NavGraphDirections.actionStartupHome())
     }
 
-    override fun attachBaseContext(base: Context) {
+    final override fun attachBaseContext(base: Context) {
         base.components.strictMode.resetAfter(StrictMode.allowThreadDiskReads()) {
             super.attachBaseContext(base)
         }
     }
 
-    override fun getSystemService(name: String): Any? {
+    final override fun getSystemService(name: String): Any? {
         // Issue #17759 had a crash with the PerformanceInflater.kt on Android 5.0 and 5.1
         // when using the TimePicker. Since the inflater was created for performance monitoring
         // purposes and that we test on new android versions, this means that any difference in
@@ -1114,7 +1116,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         return super.getSystemService(name)
     }
 
-    protected open fun createBrowsingModeManager(initialMode: BrowsingMode): BrowsingModeManager {
+    private fun createBrowsingModeManager(initialMode: BrowsingMode): BrowsingModeManager {
         return DefaultBrowsingModeManager(initialMode, components.settings) { newMode ->
             updateSecureWindowFlags(newMode)
             themeManager.currentTheme = newMode
@@ -1131,7 +1133,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         }
     }
 
-    protected open fun createThemeManager(): ThemeManager {
+    private fun createThemeManager(): ThemeManager {
         return DefaultThemeManager(browsingModeManager.mode, this)
     }
 
@@ -1182,7 +1184,8 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
      *  Indicates if the user should be redirected to the [BrowserFragment] or to the [HomeFragment],
      *  links from an external apps should always opened in the [BrowserFragment].
      */
-    fun shouldStartOnHome(intent: Intent? = this.intent): Boolean {
+    @VisibleForTesting
+    internal fun shouldStartOnHome(intent: Intent? = this.intent): Boolean {
         return components.strictMode.resetAfter(StrictMode.allowThreadDiskReads()) {
             // We only want to open on home when users tap the app,
             // we want to ignore other cases when the app gets open by users clicking on links.
@@ -1262,6 +1265,6 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
 
         // PWA must have been used within last 30 days to be considered "recently used" for the
         // telemetry purposes.
-        const val PWA_RECENTLY_USED_THRESHOLD = DateUtils.DAY_IN_MILLIS * 30L
+        private const val PWA_RECENTLY_USED_THRESHOLD = DateUtils.DAY_IN_MILLIS * 30L
     }
 }