How about add features:
> Add to current tab to session group.
> Override session group with current window tabs.
> Always show searchbar.
> Order group by drag.
> Provide recycling bins.

saved my a*s off

I Love Tab session Manager. You use it once in a lifetime, but that time it save your tab, it is so important to have, but the auto backup feature is a hustle because I had more than 30GB of backup in my download folder without realizing it. Old backup should be deleted automatically, OR just backup once a day instead of every time the Firefox starts, anything more user friendly. I have to delete backup manually and sometimes I forget

Great add-on, just what I needed. Many thanks!

The session manager works well saving my pages, but fails to reload them in the right groups. I use Tiled Tab Groups. Did I do something wrong? Is interoperability planned with tab group managers?
Regards.

Terrible addon that's wiped all of my sessions many times. Avoid if you care about long-term session storage.

Greate addon. Let's add "recomended" badget?

Génial ! A tout récupéré après un vilain crash.

I use it approx 3 years! The Best!

WARNING: this addon is not compatible with «Simple Tab Groups» and would pull all grouped tabs into one window. Luckily, STG has a backup function.

Firefox can be garbage with saving your sessions. Can't count how many times it has failed for no damn reason, and this add-on has saved me countless headache. Definitely a must have

Add-on works without issues. The user experience, however, is not exciting at all.
Session management bar should definitively be on the right site, so you can access tabs by moving the mouse just down, not across a half screen.
Design is disruptive compared to the beautiful Firefox.
And this shouting icon that only means that sessions are not synced (which is every time you change a tab) is absolutely frightful. It is better not to even enable sync.
Highly recommend to hire a UX designer...

Install. Save session. Close all windows. Restart firefox. Restore session. Loses 75% of the windows. Great work!