I retract my previous review Rated 5 out of 5 stars

If it gets listed, that is. I've since discovered that the problems I was experiencing were all due to another extension which is not endorsed by Mozilla. That'll teach me. As for Tab Mix Plus, it's great and no copy of Firefox should be without it.

Again, my apologies to the author.

This review is for a previous version of the add-on (0.3.6).