- Install Tree Style Tabs Firefox extensions.
- Install
userChrome.css
(see file content below below)- Linux
- cd to ~/.mozilla/firefox/[your profile id].default/
- create folder
chrome
if it doesn’t exist - put
userChrome.css
in it
- Windows
- press Win+R
- insert
%APPDATA%\Mozilla\Firefox\Profiles\
and press enter - select your profile, most probably it will include
release
substring - create folder
chrome
if it doesn’t exist - put
userChrome.css
in it
- Linux
- Turn on userChrome. about:config => toolkit.legacyUserProfileCustomizations.stylesheets => True.
- Disable animation. Preferenes ➡ Add-ons ➡ Tree Style Tab ➡ Appearence ➡ Disable animation.
Thank you, unknown reddit user, who wrote this. I’ve updated your css file, but all credit goes to you.