Index: adblockplussbrowser/res/values/sysstrings.xml
===================================================================
--- a/adblockplussbrowser/res/values/sysstrings.xml
+++ b/adblockplussbrowser/res/values/sysstrings.xml
@@ -14,9 +14,13 @@
     <string name="key_previous_version_code">previous_version_code</string>
     <string name="key_whitelisted_websites">whitelisted_websites</string>
     <string name="key_force_update_subscriptions">force_update_subscriptions</string>
 
     <!-- Preference values -->
     <string name="download_settings_value_wifi">1</string>
     <string name="download_settings_value_always">2</string>
 
+    <!-- Notification -->
+    <string name="key_last_tried_notification_update_timestamp">last_tried_notification_update_timestamp</string>
+    <string name="key_last_notification_update_timestamp">last_notification_update_timestamp</string>
+
 </resources>
\ No newline at end of file