Very nice. Very convenient. Rated 5 out of 5 stars

Very nice! Convenience of instant access to buttons without taking valuable space at the top and bottom of the screen. Also holds addon buttons like LastPass and ABP.

(Geoff: There an "automatically hide" function, but it only works in full screen mode. For me, that is the only time I need it. Your needs may be different.)

This review is for a previous version of the add-on (0.2.1-signed).