very useful addon.. it saved me several times when firefox lost my 3 windows with 1500 tabs each

esay to use, to manage, i recommand

Très pratique pour sauvegarder ses groupes d'onglets et reprendre une activité précise liée à ceux-ci. Il y a beaucoup d'options de sauvegarde pour choisir comment on utilise l'extension !

神です。ありがとうございます。無いと困ります。

Thank you, wery much. for work. for life.

saved my 3k tabs session

It's highly customizable, and it works exactly as I want it to.

Firefox closed all my tabs without warning and couldn't restore them from its own session backup files, even though those files contained all my tabs. This extension helped me restore them all easily, which saved me from having to restore a large number of tabs manually, one by one.
If this extension wasn't there, I would have replaced Firefox with another browser.