Firefox userChrome to mnimise wasted space when using Tree Style Tabs under Windows

userChrome.css

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

/* 
STANDARD TST CONFIG

#sidebar-header - to hide the sidebar header
#TabsToolbar - hide just the tabs, leaving the window controls visible
push window controls down into the same vertical space as the tab bar
make the window controls roughly the same height as the nav-bar, saving window title space

push nav-bar to the right to make space for the window controls
optional -make nav-bar background look the same as the window controls background
*/
#sidebar-header { visibility: collapse; }

#TabsToolbar .toolbar-items { visibility: collapse; }
#TabsToolbar { 
  margin-bottom: -42px;
  height: 42px;
}
#nav-bar {
  background: transparent !important;
}