It is incredible that Mozilla still recommends this addon. It used to work great, but since Firefox 132 it has some major issues. For me, first time it lost all groups when I installed Firefox 132 (31 Oct 2024). However, back then I managed to restore them via the addon’s setting. Then it lost them again on 10 Jan 2025 when I installed Firefox 134.

Now as others have reported, with Firefox 135, it is impossible to restore the groups via the addon’s settings. When you try to restore from a backup file, it simply closes the browser and when you open the browser again the groups are not there.

Do not waste your time with this addon.

What's going on, please provide a patch. It's very inconvenient.

Excellent

#labels are not supported. Mozilla should wake up and enter the 21st century!

I've lost all my tabs, this addon is a beyond stupid

It's an incredibly troublesome addon. Whenever you have to go back to the backup, pressing Load from backup directly closes the browser and when you open it again you realize that the backup has not loaded. So I will be switching to another addon soon.

Works very well! I find that I can re-access my tab groups when I exit my Firefox window and reopen it. Pretty good for something that has not been updated in more than two years!

Just a frustrating add-on. The grouping workflow is terrible and confusing. Don't use if you want something similar to tab groups of other browsers, because you'll be disappointed.

Have been using this for well over a year, but as has happened to many others recently, all 12 of my groups have just emptied all their tabs when I clicked to open one of them. The whole thing seems to have completely scrambled! I have deleted the add-on and will be looking for a suitable replacement. Very, very annoying!!

Very difficult & unintuitive to use. I've had tabs mysteriously disappear or become hidden (with no bulk way to revert) by simply clicking through different group management options.

There is significant risk to losing work or losing tabs, I've found.

I'm now in the process of carefully un-doing my groups so as to not lose my tabs :(