Vertical tab design for Firefox with dynamic indentation:: Sidebery and TreeStyleTabs (Legacy) themes available!
Why do you think that https://github.com/h4wwk3ye/firefoxCSS is a good alternative to FirefoxSidebar
Vertical tab design for Firefox with dynamic indentation:: Sidebery and TreeStyleTabs (Legacy) themes available!
Why do you think that https://github.com/h4wwk3ye/firefoxCSS is a good alternative to FirefoxSidebar