Awesome !!! we just need to install it and start using it using F1 and F2. Thanks for this add-on.

Useful :)

FANTASTIC! Just the feature that I was looking for :D
OK, almost... I'd love it if the switching would work using the mouse wheel instead of F1 & F2 :)

Great extension! Since my Opera times I got used to switch tabs with a key. From then, it's been quite a task to have this behaviour because extensions get outdated by Firefox as time goes by. Even the keys you chose (F1, F2 and F3) are the ones I'm used to work with. Thanks a lot for the hard work.