Rated 5 out of 5 stars

Of course it won't be supported, even in SeaMonkey eventually. That all could be easily obviated if the code were folded into the browser itself like it should have been ages ago. A last chance to avoid ruining absolutely everything about the best browser (SM), and the best choice of a bunch of bad browsers (FF).

This review is for a previous version of the add-on (5.2.0).