diff --git a/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/settings/account/AccountSettingsFragment.kt b/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/settings/account/AccountSettingsFragment.kt
index 5508b90d04..6d3fd66067 100644
--- a/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/settings/account/AccountSettingsFragment.kt
+++ b/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/settings/account/AccountSettingsFragment.kt
@@ -309,28 +309,28 @@ class AccountSettingsFragment : PreferenceFragmentCompat() {
         val syncEnginesStatus = SyncEnginesStorage(requireContext()).getStatus()
         requirePreference<CheckBoxPreference>(R.string.pref_key_sync_bookmarks).apply {
             isEnabled = syncEnginesStatus.containsKey(SyncEngine.Bookmarks)
-            isChecked = syncEnginesStatus.getOrElse(SyncEngine.Bookmarks) { true }
+            isChecked = syncEnginesStatus.getOrElse(SyncEngine.Bookmarks) { false }
         }
         requirePreference<CheckBoxPreference>(R.string.pref_key_sync_credit_cards).apply {
             isEnabled = syncEnginesStatus.containsKey(SyncEngine.CreditCards)
-            isChecked = syncEnginesStatus.getOrElse(SyncEngine.CreditCards) { true }
+            isChecked = syncEnginesStatus.getOrElse(SyncEngine.CreditCards) { false }
         }
         requirePreference<CheckBoxPreference>(R.string.pref_key_sync_history).apply {
             isEnabled = syncEnginesStatus.containsKey(SyncEngine.History)
-            isChecked = syncEnginesStatus.getOrElse(SyncEngine.History) { true }
+            isChecked = syncEnginesStatus.getOrElse(SyncEngine.History) { false }
         }
         requirePreference<CheckBoxPreference>(R.string.pref_key_sync_logins).apply {
             isEnabled = syncEnginesStatus.containsKey(SyncEngine.Passwords)
-            isChecked = syncEnginesStatus.getOrElse(SyncEngine.Passwords) { true }
+            isChecked = syncEnginesStatus.getOrElse(SyncEngine.Passwords) { false }
         }
         requirePreference<CheckBoxPreference>(R.string.pref_key_sync_tabs).apply {
             isEnabled = syncEnginesStatus.containsKey(SyncEngine.Tabs)
-            isChecked = syncEnginesStatus.getOrElse(SyncEngine.Tabs) { true }
+            isChecked = syncEnginesStatus.getOrElse(SyncEngine.Tabs) { false }
         }
         requirePreference<CheckBoxPreference>(R.string.pref_key_sync_address).apply {
             isVisible = FeatureFlags.SYNC_ADDRESSES_FEATURE
             isEnabled = syncEnginesStatus.containsKey(SyncEngine.Addresses)
-            isChecked = syncEnginesStatus.getOrElse(SyncEngine.Addresses) { true }
+            isChecked = syncEnginesStatus.getOrElse(SyncEngine.Addresses) { false }
         }
     }
 
diff --git a/mobile/android/fenix/app/src/main/res/xml/account_settings_preferences.xml b/mobile/android/fenix/app/src/main/res/xml/account_settings_preferences.xml
index 300331efb5..f1cbf8ea99 100644
--- a/mobile/android/fenix/app/src/main/res/xml/account_settings_preferences.xml
+++ b/mobile/android/fenix/app/src/main/res/xml/account_settings_preferences.xml
@@ -29,38 +29,38 @@
         android:layout="@layout/preference_cat_style">
 
         <CheckBoxPreference
-            android:defaultValue="true"
+            android:defaultValue="false"
             android:key="@string/pref_key_sync_bookmarks"
             android:layout="@layout/checkbox_left_preference"
             android:title="@string/preferences_sync_bookmarks" />
 
         <CheckBoxPreference
-            android:defaultValue="true"
+            android:defaultValue="false"
             android:key="@string/pref_key_sync_credit_cards"
             android:layout="@layout/checkbox_left_preference"
             android:title="@string/preferences_sync_credit_cards_2" />
 
         <CheckBoxPreference
-            android:defaultValue="true"
+            android:defaultValue="false"
             android:key="@string/pref_key_sync_history"
             android:layout="@layout/checkbox_left_preference"
             android:title="@string/preferences_sync_history" />
 
         <CheckBoxPreference
-            android:defaultValue="true"
+            android:defaultValue="false"
             android:key="@string/pref_key_sync_logins"
             android:layout="@layout/checkbox_left_preference"
             android:title="@string/preferences_sync_logins_2" />
 
         <CheckBoxPreference
-            android:defaultValue="true"
+            android:defaultValue="false"
             android:key="@string/pref_key_sync_tabs"
             android:layout="@layout/checkbox_left_preference"
             android:title="@string/preferences_sync_tabs_2"/>
 
         <!-- The default visibility is 'false' because we don't display this on most channels. -->
         <CheckBoxPreference
-            android:defaultValue="true"
+            android:defaultValue="false"
             android:visible="false"
             android:key="@string/pref_key_sync_address"
             android:layout="@layout/checkbox_left_preference"