really cool addon but i really hate how it opens a new window all the time and i do no know how to turn that option off. it also takes up a lot of space on the screen.

This plugin is fantastic and I really really like it!

There's one change I'd like to see changed, I completely agree with the name of your plugin and it works super well in a lot of contexts, but it's a bit problematic in the Tree Style tab itself.

You see, the name is so long, that It pretty much always gets clipped as you can see here in this screenshot.
https://i.imgur.com/UI9kX37.png

I would argue that the name "Tabs" is more than enough and a tad cleaner.

Pas mal, mais serait-il possible de pouvoir réduire la largeur des onglets comme le faisait les anciennes versions ??

Sometime tab selection shifts by one tab. Otherwise very useful! Prefer to disable animations and fading if you use a lot of tabs to speed up loading.

It's good except a couple of glitches: sometimes plus button doesn't work, sometimes clicking on a tab opens other tab.

@Alexandru Nedelcu -- Any way to restore the window control buttons (e.g., min, max, close)?

TST is a great addon, but the need to continually write your own CSS code to make it behave within reasonable expectations is frustrating. Moreso, the changing css code makes this work-around unreliable; see above. The latest change to FF has rendered the previous solutions obsolete: eliminating the duplicate horizontal tabs using the previous method also eliminates the window controls.

This helps browsing a lot, but it does have a few bugs. Right now, I'm experiencing a bug where the tabs have been slightly truncated, chopping off the favicons.