To quote user tuna's review a day ago
"Firefox has not been able to start since the June 4 update."
I have the exact same problem and in order to make firefox start normally with the extension enabled, i have to start a private browsing session which opens two windows, one with one tab in private browsing and a second normal one with all the tabs that the extension has saved. Otherwise the apllication is killed almost immediately after starting with the extension enabled.

Thanks for fixing it! 7.0.1 works just fine.

Firefox has not been able to start since the June 4 update.
Correctly, it starts once, but Firefox goes down without restoring tabs.
I have now disabled the add-on.
Please remove the cause as it is a great add-on that is very useful.
Or tell me how to deal with it.

This review is for use on Firefox. I have tried different addons to save tab sessions and this one, Tab Session Manager is the only one that works 100% of the time. Thank you for this addon, saved my butt many times.

هايل

Отличное расширение, упрощает работу в браузере

Installed this a long time ago and forgot it was there. Today, Firefox lost my open windows history and I was panicking until someone reminded me about this extension. I used it for the first time and it rescued everything!! Thank you sienori!

I love this extension. Thanks for your efforts!

I've used this add-on running pretty much in the background for years and the auto-save feature saved my butt from accidentally closed windows a few times. It was like a nice browser session insurance policy. But the user saved sessions feature combined with the new*** tracker feature is just brilliant. Now this add-on is saving me from a personal multi-opened windows with multiple tabs hell and has become a legit sessions manager for me. And the sync feature to Google Drive continues to be rock solid and one of the few add-ons that does it correctly (it just works). I just donated to the dev so I'm putting some money where my mouth is. ;-)

***Well I've since discovered this feature was released in May of 2022 so I guess it isn't as new as I thought (which was Sept. 2023). And it has some quirks around sessions opening at startup where you have to close the session and re-open it to get tracking going. I'm more concerned there haven't been any significant updates since Sept. of 2022 and I hope the dev isn't slowly abandoning this project. :-(

I use this as a solid capable reliable method to save my Tabs and store different Sessions. Brilliant, useful, practical, Solid.

A very useful and easy to use extension, which does exactly what it says it does.