I have been using this extension for years and I must say it’s the best tab manager I know. There is nothing at the moment on Chrome which works nearly as well as Tree Style Tab does on Firefox (lack of native Sidebar maybe?). Use together in combination with the other addons that extend TST for the best experience and productivity boost!

This extension is one of the main reasons that keeps me on Firefox. If Firefox didn't have this, I honestly don't know which browser I'd be using ... but, in whatever case, I would be a sad little monkey! If you use more than 5 tabs, THIS is the way it should be!

Great extension in the very "limited" new Firefox. Thank you!!!

This add-on is amazing
but it used to be better

Works perfectly (nonobstant les pertes de fonctions dues au changement du moteur de Firefox, ce qui est indépendant de la volonté de l'auteur) !

For those who would like to hide the native tab bar :
https://medium.com/@Aenon/firefox-hide-native-tabs-and-titlebar-f0b00bdbb88b
- toolkit.legacyUserProfileCustomizations.stylesheets to true
- create or edit the “userChrome.css” file and add the following :
#TabsToolbar {
visibility: collapse;
}

調べ物をする際にグループ化することで、簡単にタブを管理することもでき、大変満足しています

要望
・特定のツリーに対し、解放するという機能が欲しい
・「下／右側のタブをすべて閉じる」をコマンド化してほしい
・「下／右側のタブをすべて閉じる」をグループ内用のものが欲しい

これからも頑張ってください！

UPDATE 3-STARS: Frustrating that a core function to group selected tabs has been removed and now requires a separate extension to be installed.

ORIGINAL 5-STARS: Great extension, love that it can be extended by other extensions too.

Nice extension overall. There are a few minor tweaks I wish it had but nothing too big.