I like Tab Center Reborn, then use userChrome.css to hide the native tabs. I also set the preference browser.compactmode.show=true to enable the "compact densi

I like Tab Center Reborn, then use userChrome.css to hide the native tabs. I also set the preference browser.compactmode.show=true to enable the "compact density" in the customize toolbar section. Good use of screen real estate with these changes.