I now install this everywhere Rated 5 out of 5 stars

This perfectly manages profile switching, almost as seamless as Chrome. It should be built into Firefox, but it's not and thanks to this extension, who cares? I've installed this many times now, perhaps nearly 20 over Linux, Windows and OS X, and it works really well. (problems I experienced with an earlier version have gone; this current review is based on more than a month of daily use of this addon)

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