Good one, does what is said, however, it would be great if you could integrate tab limiter and tab counter - in this way I need to have open another extension which is counting tabs, and yours, which prevents more than desired to be open. Before this major Firefox change, there was a great tool doing exactly that, and I still can't find those two functions integrated.

In any way, thanks for a nice add on!

Edit: One more star after last version