Excellent functionality and interface.
I have been using the extension for more than two months (~500 hours, PC worker) and so far have not a single failure.
+ there are backup copies of sessions - TabSessionManager - Backup.

The best FF session manager at the moment.
My wishlist:
- Could be a little faster at startup
- FF sync support would be great.
- Possibility to rename saved sessions

very important productive extension. Thanks for save my tabs.

Its a life saver and with cloud sink, its also has life backups.

нет возможности из открытой сессии добавить вкладку в одну из сохранённых ранее сессий. Тогда был бы полноценный заменитель онлайн закладок, т.к. синхронизация с Google — наше всё :-).

Now that it supports cloud sync (the only thing it was missing), it's surely the best tab session manager out there, and I've tried many!
Thank you for your last update, hope you're going to support other cloud storage too as Dropbox and, why not, something open like Nextcloud.
Great work!

I love your extension but on latest firefox v76 it stopped working and lost all my sessions...doesnt shows me the open tabs so i cannot create manually either.....