I like tab-less browsers. Leaving tab/window management to the OS means I don’t have to learn browser-specific commands on top of the OS's ones. I'm using Fire

I like tab-less browsers. Leaving tab/window management to the OS means I don’t have to learn browser-specific commands on top of the OS's ones. I'm using Firefox with a custom userChrome.css: #TabsToolbar { visibility: collapse !important; } Works quite ok but I cannot disable opening tabs completely in Firefox.