Rated 4 out of 5 stars

There is a very annoying bug. Open a plenty of tabs, select one of the last, then switch to another application (e.g. notepad) and switch back, you'll get a state when first tabs are focused and selected tab is somewhere off visible area. This buggy behaviour is not present with Default Firefox theme.

This review is for a previous version of the add-on (2.6.7).