Unfortunately, other add-ons use Firefox's built-in notification system (DownThemAll for instance), and these will keep using the built-in one till we are able to directly replace Firefox's built-in notification system by a libnotify one.
Unfortunately, other add-ons use Firefox's built-in notification system (DownThemAll for instance), and these will keep using the built-in one till we are able to directly replace Firefox's built-in notification system by a libnotify one.