I've been using Tree Style Tab for years. Occasionally it reloads (as in seems to close itself and reopen), but otherwise has performed flawlessly. It's a staple add-on for me, and is a big reason I use FireFox.

SUPER

This extension is the undeniable future of browsing the internet. 10/10 - Life changing.

[ FEATURE REQUEST ]:

Please let us make new empty tabs to use as tree parents. EXAMPLE: In unity editor, "create empty object" to use as parent of other objects. It is also important to have editable tab title that saves between sessions.

Just found this, love it! :D

Pretty simple, works great, excellent for organisation and power users with MANY tabs :D

długo używam ten styl i dobrze się sprawuje
I've been using this style for a long time and it works well

I cannot imagine using a browser without it. It's a pity that Firefox breaks compatibility and right now my main issue is that I cannot share tabs between devices.

Extremely nice

1) wish the "header" in the tree pane could be much more minimal.
2) wish there was a GUI control or d&d operation to create new tab-group elements vs bookmarking `about:treestyletab-group?title=New Tab Group`