The clownish and evil bastards at Mozilla have worked very hard to take away Tabmix Plus, which is the best extension ever made for Firefox. The Mozilla team seemed to wage a particular war against that extension and its users for some reason1. What I didn’t realize is that the developer with great effort managed to revive it.
The installation directions are a bit convoluted, but it works fine once you get it slammed in there.
It’s such a great extension that makes using the internet so vastly better. I donated $50 to the dev. What I wish I could do, though, is donate a billion dollars to myself, buy Mozilla, fire everyone and blackball them from the industry forever. But dare to dream, eh?