I'm one of those people who like to have 100+ tabs open. This add-on is by far the the best option for managing those tabs on Firefox.
Thank you or the amazing work!

This add-on is excellent. For my use case, web browsers are basically unusable without something like this. I've been on a a years long search for something like this that actually works well, with many disappointments along the way. There are several vertical tab organizing add-ons out there, but this has by far been the most stable one for me. I did have some instances of tab groups being lost, but the settings menu provides a suggestion for fixing this (under "Where to store tabs") which seems to have worked for me. It also looks good, functions well, and has lots of customizable options. On suggestion is to have the option to display the tab group names along side, or as an alternative to, the icons. Maybe I'm missing this option somewhere.

Been looking for an extension to keep my pinned tabs open after I close Firefox. This seems to be doing the trick :).

Has a ton more options that I have yet to dive into :D.

It is the reason I switched to Firefox. Had to write some CSS, though.

hermosa

Added five minutes ago and it's already blown my mind. I feel like I'm rediscovering Firefox. Excellent!

Excellent! Great addon, more useful than TreeStyleTab: It has all what you need out-of-the-box. Many preferences with logical structure. Great thanks for Snapshots - It safe me few times and I didn't waste a lot of time for recovering. I especially like a feature to save the whole tree of tabs as bookmark: add with fool folder structure or just as group of standalone tabs. It's beautiful and handsome, no doubts ♥