Idea is alright, but the implementation is too buggy:
- stops working with 'type error' messages
- searching tabs doesn't work properly
- tabgroup management seems flaky

I know it is probably just growing pains, but please focus on the basics first.

i need help. i removed this complement but it left me with a sea of dead tabs (my old tabs) the only way that can work now is if i have this complement installed >:(

I don't like a misclick causing me to loose almost all of my tabs. This still isn't suitable for common use.

All of my saved groups are gone after a crash of Firefox.
Pinned tabs are missing when restored from backup.

Just opened Firefox to find all 70+ of my tabs (in another closed/inactive group) vanished. And *yeeeeessss*, I have set preferences to "show windows and tabs from last time", as I'm sure have most complaining of the same issue here.

Ergo, worse than useless. Uninstalled in disgust, annoyance, and disappointment.

Back to the drawing board...

Been testing it for some weeks now...
Randomly browser opens with no group. Randomly tabs appear empty or do not load. I had to manually save all as bookmarks like we did many years ago...
Tested in several PC's and same issues...

Very, very unrealiable at this time to say the least.


Edited:
For Drive4ik
Using v 2.3.6 All OS are Win10 1709.

Very often i lost some of my Stored Tabs by restarting the browser. I only got "New Tab" without URl ...
Sometimes ALL Tabs were lost after closing Firefox ... Very frustrating ...

Useless. Couldn't move tabs to different groups. When I removed the add-on most of my tabs were lost.

Lost all my tab groups after using it for weeks :-(

Updated to new version yesterday and moved a group up using drag and drop. Today when I go into a group I get an error message saying it is NULL. Then this error extends to all the following groups. I have lost half my groups. Every time I load a group it opens an additional New Tab to the group. Not happy!!!

Fine addon. The error drop all my open tabs. Wery well

I can not believe that this is the replacement for the old Tab Groups??? I just tried to restore 139 tabs and lost everyone of them. If I had just seen the restore session tab before I tried to use this extension: I would have been fine. I am NOT at all - in no way at all - liking this new Firefox except that it is faster. Yes it most definately is but Most of the fun using Firefox was the addons and extensions. That - by the way - used to work pretty darn well. Now there are Other extensions or Might we Say - No Extensions!

reloads tabs when switching groups, major drawback