I use it all the time. i can see in a glance which tab is parent of another. and I can jump from the first to the last in a click, evne if i have more than 100 tabs opened.

Didn't like it, removed.

After using it, now I need this in every browser I use.
Side note: If someone wants to hide upper tabs, they can do so using custom css or install addons.mozilla.org/en-US/firefox/addon/toggle-native-tab-bar/

Overall looks great and works well, but when it's active I can't right-click on tabs to bookmark them. When I try to do this, nothing happens. I tried creating a new profile and the problem is still there. Only when I disable the extension am I able to add bookmarks in this way.

Très bien, très pratique, mais l'installation provoque un comportement inattendu dans les autres fenêtres de Firefox dont le panneau latéral n'est pourtant pas réglé sur Tree Style Tab (sur marques pages, par exemple) : les nouveaux onglets s'ouvrent alors dans n'importe quelle position, et non pas à côté de l'onglet qui en a directement commandé l'ouverture. Une solution ???
Si je désactive temporairement Tree Style Tab, le comportement d'ouverture des nouveaux onglets redevient normal !

sangat membantu BINTANG 10!!

Nice, although a bit slow every time when it's opened.
A live search/filter on top would be great (getting focus when side bar is opened)