0.41 Rated 5 out of 5 stars
Wonderfully useful addon. This is one of the examples of why Firefox is great.
0.41 seems to run slow for me, though. It takes a long time to traverse every tab (I keep a large number in Panorama groups), while 0.40 does it instantly. Is this some regression? I am using Beta channel (8 at the moment) on Linux.