Rated 5 out of 5 stars

I've always liked this, so I'm just reporting a bug that I'm sure will be fixed soon: First release of FF 4.0 seems to break the whole extension (1.12). I get a tiny box appear instead of the menu listing the extensions. Thanks for a great add-on, just hope I can use it again soon!

This review is for a previous version of the add-on (1.12.1-signed). 

I'm not sure what would cause that. It should work on 4.0. It may be special characters in another add-on's name. Version 1.13 should fix that (not reviewed yet, but you can get it by clicking on Version 1.12 on the bottom of this page in the release notes box.) If not, please post on http://forums.mozillazine.org/viewtopic.php?f=48&t=2141579