I'm not sure why this has such a low rating. Sure, it isn't as good as Session Manager was in the old Firefox Add-Ons, but it's the best replacement there is and it's improving all the time.

Perfect add-on. Save your sessions as you want.

Einfach klasse!!

Awesome addon! FireFox ver. 57 came out only a month after I discovered the incompatible Session Manager addon, and it was disappointing to stop using it right after finding out how useful it is. This addon is a WIP Session Manager replacement for FF 57, and so-far it works great. The best part is that I can directly import the sessions from SM I had saved, which is super convenient. Other people seem to be having some problems and it doesn't have all the features that SM had, but it works fine for me.

Thought I lost all my sessions but it looks like they were just hidden.

Great extension, it works like it should.
Only one complain. Every time I start Firefox, the settings tab of the Tab Session Manager is opened.
Please fix this.
Thanks.

I love it! Sometimes the 'Restore previous section' from Firefox worked, some didn't. So I guess this is the extension that I'd use most in the future ;)

Весьма даже удобное расширения. Из того что я перепробывал для Мозиллы - лучшее! Главное, что есть импорт и экспорт сессий.