Disable cookie banner handling by default.

app/src/main/java/org/mozilla/fenix/settings/CookieBannersFragment.kt

@@ -37,7 +37,7 @@ class CookieBannersFragment : PreferenceFragmentCompat() {
     }
 
     private fun setupPreferences() {
-        requirePreference<SwitchPreference>(R.string.pref_key_cookie_banner).apply {
+        requirePreference<SwitchPreference>(R.string.pref_key_cookie_banner_v1).apply {
             onPreferenceChangeListener = object : SharedPreferenceUpdater() {
                 override fun onPreferenceChange(
                     preference: Preference,

app/src/main/java/org/mozilla/fenix/utils/Settings.kt

@@ -538,7 +538,7 @@ class Settings(private val appContext: Context) : PreferencesHolder {
     )
 
     var shouldUseCookieBanner by lazyFeatureFlagPreference(
-        appContext.getPreferenceKey(R.string.pref_key_cookie_banner),
+        appContext.getPreferenceKey(R.string.pref_key_cookie_banner_v1),
         featureFlag = true,
         default = { cookieBannersSection[CookieBannersSection.FEATURE_SETTING_VALUE] == true },
     )

app/src/main/res/values/preference_keys.xml

@@ -149,7 +149,7 @@
 
     <!-- Cookie Banner Reduction Settings-->
     <string name="pref_key_cookie_banner_settings" translatable="false">pref_key_cookie_banner_settings</string>
-    <string name="pref_key_cookie_banner" translatable="false">pref_key_cookie_banner</string>
+    <string name="pref_key_cookie_banner_v1" translatable="false">pref_key_cookie_banner_v1</string>
 
     <!-- Tracking Protection Settings -->
     <string name="pref_key_etp_learn_more" translatable="false">pref_key_etp_learn_more</string>

app/src/main/res/xml/cookie_banner_preferences.xml

@@ -3,8 +3,8 @@
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 <androidx.preference.PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
     <SwitchPreference
-        android:defaultValue="true"
+        android:defaultValue="false"
-        android:key="@string/pref_key_cookie_banner"
+        android:key="@string/pref_key_cookie_banner_v1"
         android:summary="@string/reduce_cookie_banner_summary"
         android:title="@string/reduce_cookie_banner_option" />
 </androidx.preference.PreferenceScreen>

nimbus.fml.yaml

@@ -223,14 +223,14 @@ features:
         value: {
           "sections-enabled": {
             "feature-ui": true,
-            "feature-setting-value": true,
+            "feature-setting-value": false,
           }
         }
       - channel: nightly
         value: {
           "sections-enabled": {
             "feature-ui": true,
-            "feature-setting-value": true,
+            "feature-setting-value": false,
           }
         }
   unified-search: