I just love, love, love the ability to put all my different research/interests/archive into groups.

It's awesome ! Really helps to manage >100tabs. Thank you so much!

I love it. I'm using it to create different areas for my work env. I have stuff to read, docs to follow, and current worspace etc. This extension is excellent, super stable so far.

Exactly what I was looking for. Allows you to load a group of tabs in the current window and flip between groups without any problems. I only wish there was an visual way to identify which groups are currently loaded without clicking on the menu button.

I can't explain how I've survived without this extension before.... This is perfect extension that is helping me on daily browsing, and daily tasks keeping everything organized and handy. It also saves a lot of space on the nav bar. This should be the default approach on Firefox, while it comes to browsing experience, but I am glad that this extension does the job perfectly. Well done Drive4ik and contributors, well done!

This addon has become a vital part of my firefox usage. I can even say it's one of the reasons I'm using firefox and also recommend firefox to others. I hate having so many tabs open. I prefer logical grouping of the tabs. It's more than a nice to have for me, it's a necessity. Great work.

Auto sorting tabs by keywords is ... I can’t decide if I need it, but it looks interesting.
Installed Firefox Nightly 71 + tab manager Tree Style Tab = while everything is stable.

Below was a complaint about the delay in opening the menu on 'F8' - yes, rarely, but sometimes the menu does not immediately open, or does not open at all.