Rated 3 out of 5 stars
With FF 3.5, be sure you know what your tabs do by default. Right-click on ANY tab to see a menu, and also notice the IE-like Tab+ box following your farthest-right tab. That IE-like one will disappear if you bump this extension. Just so you know.This review is for a previous version of the add-on (3.0.3).
Fixed it and new version available