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

hermosa

Tabs often move from their custom group to the default group. Makes grouping useless

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 ♥

After rebooting computer - all settings gone

good. It really is one of the best Firefox addons.

But to mention one downside, the Tab "Unload" is inconvenient.

It would be nice if the Unload function could support mouse and keyboard.
1. Please, Support Mouse Click
2. Please, Support Shortcut Key