Rated 5 out of 5 stars

Great extension. Works with FF16.0.1 but the icon might disappear from the add-on bar so do as the author replied to me.

Leszek, dziękuję za odpowiedzi!

This review is for a previous version of the add-on (1.2.6). 

Just right click on navigation bar, choose Customize and drag and drop AutoCopy2 icon on add-on bar. Please change to 5 stars. :)