This is the Tab add-on I have been missing from Firefox. It allows you to save a session full of Tabs, and collections of Tabs - such as a Work collection or Study collection. This add-on is now integral to my workflow. Thank you, @sienori!

I don't recommend this extension. There are many session managers. I've used about 10 or so over the years. This is probably the worst UI I've yet seen.

The main drop down window of this add-on is disorganized and un-intuitive.

Where does it save the backups? In the preferences, it states, "Specify the folder to save the backup file. The save location is limited to the folder under browser download folder."

Does anyone have any idea what "the folder under browser download folder" means? I sure don't. I wonder if it's implicitly assuming the user is running Windows, but I really don't have the faintest idea. I looked everywhere I could think of, and did a search of my hard drive, but found nothing.

I'm very sorry I wasted time on this. Don't make the same mistake I did.

This add-on is AMAZING!!! It has saved me multiple times when my computer has crashed and when my wife's PC reboots randomly! It works flawlessly with Firefox, Brave and Chrome!

I love this add-on so much, I even donated money and would do it again and again!!

The original tab order will be lost when window restored. I'll take quite a few time to rearrange it.

Great app. Makes organizing and finding multiple open sites easy. Can save multiple tabs as sessions for those sites you use often.

cool

EDIT: why is tab auto-backup limited and FF folder???

Verified but still... Unless it is open-source where you can compile it yourself, I don't know...

EDIT: Feedback: Could you please make it - so you can make folders for saving sessions??? I read thousands of pages, I won't be able to discern previous sessions, once I have many of them!!! That would help a lot THANKS! As tags don't work for everything! At least there is search and you can rename session names!!! Also could you add renaming names of Firefox windows? BTW thank you for making this addon, firefox devs have iq 10...

Devs of these addons don't account for many practical things, this is almost perfect ergo 5 starts.

ALSO CONSIDER MAKING SEARCH ACROSS ALL TABS, I CAN'T FIND ANYTHING with my 1000 tabs. Chrome session buddy had this...

UI is little bit counter-intuitive, at least the first time, I was scared to click something to not mess up my windows...

Generally satisfied, but last update deleted all my saved sessions...

Brilliant add-on. Thanks!