複数のタブやウィンドウを保存しておく機能が気に入っている。Android版Firefox Nightlyで使えるようにしてほしい（indexedDBが使えないとエラーが表示される）

doesnt work automatically session saving!

really nice extension, will use it. If I only could put my sessions into "folders" to hide my private things - that would be 5 stars!

Simply an amazing tool to save your day!

I had over 75 GB of backup files in the downloads folder because I mistakenly turned off Reminder. You see, I have to manually delete old backups, even though a session manager should manage it, and it is possible through WebExtension API which Allow unlimited storage. I am sorry to say but I am disabling it, until a better solution is available :(

Tab Session Manager basically saves copy of your windows or groups of windows whenever you close them, or on demand, for you to summon back whenever you need them. It's a really great add-on for people with tons of tabs and windows! The interface is a bit aggressive with its popup asking for donations, but it's fine otherwise!

My only request is that I'd massively prefer a sync option with my Firefox account over the provided Google drive option. In corporate environments, it's not always an option to use Google services! Changing this would get my review up to five stars.

This is one of those essential addons that you just must have, no questions asked. I configured it to auto-save the tabs every 30 minutes. It has already saved me a lot of time and headaches when I experience crashes, and the browser can't always recover the last session by itself.
Thank you Sienori!

I get some problem , when i Enable Synchronize Function to google drive , i didn't see any .json file in there , where they go ?

Great work👏