Works for me in Firefox 8.0 Rated 5 out of 5 stars

To keep this working after browser updates, you can also use add-on "Compatibility Reporter" by Mozilla. With this, "incompatible" add-ons won't be disabled automatically, and you'll even find under Tools/Add-ons an opportunity to flag whether a particular add-on still works for you - for others to know! Otherwise you can disable it by hand (as always).

This review is for a previous version of the add-on (0.6.3).