This is one of those essential addons that you just must have, no questions asked. I configured it to auto-save the tabs every 30 minutes. It has already saved me a lot of time and headaches when I experience crashes, and the browser can't always recover the last session by itself.
Thank you Sienori!

Great work👏

Very useful when you have so many tabs to save and open. I've read a review where they said that this extension doesn't work with multi-account containers but in my case, it works with it. When I restore tabs or open a session, the containers are working.

How do I save sessions (permanently) or sort of favorite them so that I can open the groups of tabs later on? Can we replicate Simple Tab Groups functionality with Tab Session Manager ? Thanks.