After several months of using I can say: Absolutely Vital. When you don't want to close a window (just in case you possibly would miss the tabs), save the window instead. No more gazillions of windows, and no tab is lost.

works

Very good. Just wish there was an option to remove duplicates.

das beste Addon zu Sessionverwaltung in Firefox und Opera Web Browser!! Benutze es seit mehreren Jahren in Firefox und nun auch in Opera - absolut zuverlässig und unglaublich simpel zu bedienen.

Doesnt store protected/muted/etc status pages=\

完全に動作します。仮に将来動かなくなっても無料の物に理不尽なクレーム付けるほど人間腐ってません。今後とも感謝しながら使わせていただきます。

Where the hell are all my tabs!!!??
The settings have ALL my windows and tabs to automatically save and restore... I am missing more than half my windows and hundreds of tabs!!!

dddddddddddddd

Jan-2025 This outfit used to have two extensions - a video downloader and this Tab Session Manager. The video downloader stopped working about a year ago and now the Tab Session Manager has stopped working too. For almost two years, I've allowed them to autodebit my Paypal - BUT NO MORE. When I wrote them about the video downloader not working I never got a response. Adios.
Win 7 Pro
Firefox 115.19.0esr (64-bit)
Dell Precision M6600 w/8GBy