Hi. I'd like to keep everything necessary in TabsToolbar. I'm using 13" Air, want to save some space so i have autohide in chromecss on nav-bar. Is there about:config or userChrome.css option to move '''system buttons''' - back button, forward button and hamburger button '''from nav-bar to TabsToolbar'''? Three fingers left or right swipe or shortcuts cmd <- -> are somehow not as fast as using buttons. Thanks