Rated 3 out of 5 stars

Nice idea but the toolbar button for using it keeps disappearing without a trace, meaning that you can't find it in the customize window at all. Sometimes it might come back for a short while, only to be gone again soon afterwards (FF 26). Some other restartless add-ons display the same behaviour, but at least one can find the button and reinstate it in the toolbar.

This review is for a previous version of the add-on (0.2.6.1-signed).