Meh... Rated 2 out of 5 stars

Nice idea, but looks awful on Linux (opensuse 11.4, KDE 4.6.1) even using the stock FF4 theme.

This review is for a previous version of the add-on (1.4.1-signed). 

Sorry Linux community, I haven't yet had the time to apply the required Linux magic to the new FabTabs. Since the tab controls on Linux are themed by the OS itself I need to implement specific code to work around that, the 1.3.x versions of FabTabs do include this work, but since I had to start fresh for Firefox 4 I have not yet implemented it there. Working on it!