M6 fix: tracking protection via ContentBlocking (old TrackingProtectionPolicy API removed in GV 147)

app/src/main/java/dev/nova/browser/BrowserActivity.kt

@@ -17,6 +17,7 @@ import androidx.compose.ui.platform.LocalFocusManager
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.viewinterop.AndroidView
+import org.mozilla.geckoview.ContentBlocking
 import org.mozilla.geckoview.GeckoResult
 import org.mozilla.geckoview.GeckoRuntime
 import org.mozilla.geckoview.GeckoRuntimeSettings
@@ -38,12 +39,18 @@ class BrowserActivity : ComponentActivity() {
         super.onCreate(savedInstanceState)
 
         if (runtime == null) {
-            // M6: strict-ish tracking protection at the runtime level; sessions
-            // additionally opt in via GeckoSessionSettings.useTrackingProtection.
+            // M6: content blocking (tracking protection) at the runtime level.
+            // NB: the old GeckoSession.TrackingProtectionPolicy API is gone in
+            // current GV; the modern API is ContentBlocking settings.
             runtime = GeckoRuntime.create(
                 this,
                 GeckoRuntimeSettings.Builder()
-                    .trackingProtectionPolicy(GeckoSession.TrackingProtectionPolicy.RECOMMENDED)
+                    .contentBlocking(
+                        ContentBlocking.Settings.Builder()
+                            .antiTracking(ContentBlocking.AntiTracking.RECOMMENDED)
+                            .cookieBehavior(ContentBlocking.CookieBehavior.ACCEPT_NON_TRACKERS)
+                            .build()
+                    )
                     .build()
             )
             // Layer 2 of the dev console: desktop Firefox DevTools can attach