Even when the firefox history allows to open closed windows and tabs, there are occasions that can brick this feature.
This addon saved my life already once - and its a good reminder to clear my tabs everytime save enother session with 900 tabs :O

by using this add-on, I could safely close lots of tabs after working, and restore those tabs in next day. Love it!

Does an excellent job saving tabs. I wish it would include saving tab-groups in Firefox as well.

Вспомни моменты, когда браузер закрылся и после запуска нет 100 любимых вкладок и ты проспал запрос о восстановлении... Теперь такого не будет! Настрой сохранение при закрытии, 10 копий (или больше) и работай без страха.

perfect for me

Great extension, after last update, I had to remove extension and related files, and install again, after that all sessions became to auto save again normally! Thank you

20250607 It does the job as it should! No complaint, till today that it double saves my open tabs. For example, if i have 2 windows and 50 tabs on each, it saves and opens 4x windows and 200 tabs. I use this extension for a long time now (years), without complaint. I don't know if it's firefox's fault or the extension (probably a firefox thing). Please take a look at this Sienori, thank you!

### 20250608 EDIT: I don't know what happened yesterday, but today it seems to be working fine as always, as it should, so i came back to edit the review, because, again, you've done an Awesome work sienori! You 've saved us many hours from being lost! Thanks, and please keep it up!! :-)

I tried Tab Manager Plus but found it USELESS. It doesnt save sessions like it says it does but this one I installed and BOOM, So easy to click on it and choose save session, thank you!