Rated 3 out of 5 stars

It reports compatibility with firefox 4.0 up to beta 7, however I am finding a few incompatibilities with FF4b6:
- if you "unload" a tab you get one unloaded tab and a "phantom" tab that cannot be selected nor killed
- if you close a tab it switches to the next loaded tab. however it seems it doesn't know about tab groups (Panorama feature), so it'll activate a tab that it is not in the current group; it results in having tabs from several groups open. I think it should "stay" in the current group.