Tree-style tabs is life-changing if you do any kind of work that involves having a lot of tabs open at once. Having them easily grouped by project/subject/whatever you want makes going back to traditional tabs feel like such a mess! I've been a happy user of this extension for years.

Great tool to structure tabs for tab-hoarder like me!
Only one thing could make this better - If the structure would somehow be saved when I use my "OneTab" extension.
If you could work with that developer to get that then this is worth 6 stars :)

Also I like the little pop up message about how how to hide Tree tabs and regular tabs in one step, I wonder if a similar annotation could show new users about the other TST additions/addons?

BTW- Maybe the Close 'Tree Style Tab' button should be a collapse icon (<) instead of (X), because that symbolises a non-reversible closing action to me.
(Version 3.4.8)

excellente extension

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It would be great except it's not impossible under any circumstances to remove the existing tab bar in any way. I tried creating a userCrome.css file since that appeared to be the only way but to no avail. If I have no choice but to have a top tab bar there is no point in having your addon. Shame.

Absolutely brilliant -in theory. However the inability to rebind the F1 hotkey (which I use for terminal dropdown) makes this addon uncollapsible for me.

A mandatory Add-on for me. Was better before Quantum update of firefox but with CSS edits you can get some functionality back.