Remove the 1px line at the top of F11-fullscreen windows?

[Agent Orange]

Code: Select all

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

#fullscr-toggler {
  display: none !important;
}

☝️ This works!

The 1px hotedge is gone! (Though, this makes F11 required to exit fullscreen…it's at least an excellent optional situation to have available, for sure!)

(I wonder what it would take to have it there, invisible, and removed from the document flow…something along the lines of position:absolute? )