[laurent123456]

> That one feature alone keeps me on firefox. By removing the tab bar at the top of the screen, you regain a significant amount of vertical space on a laptop.

Last time I tried tree tab, it wasn't possible to remove the tab bar. Has this changed? And if so, would you mind sharing how to do it?

[Ivoah]

Just add this to your `userChrome.css` file

    #TabsToolbar {
        visibility: hidden;
    }