Vertical tab design for Firefox with dynamic indentation:: Sideberry and TreeStyleTabs (Legacy) themes available!
Why do you think that https://github.com/feathericons/feather is a good alternative to FirefoxSidebar
Vertical tab design for Firefox with dynamic indentation:: Sideberry and TreeStyleTabs (Legacy) themes available!
Why do you think that https://github.com/feathericons/feather is a good alternative to FirefoxSidebar