Linux compatibility Rated 4 out of 5 stars
Seems a little bit broken under Linux, see the screenshot: http://img231.imageshack.us/img231/1017/officeblack.png
1. addons on add-ons bar are incorrectly positioned
2. addons bar doesn't contain "X" (close button) (it's there but it's invisible unless you hover it)
3. Stop/Reload button is almost missing
P.S. Using not yet officially released Firefox 4 beta 12.
Thanks for the feedback ...
I did not know beta 12 was out. I'll have a look and fix.