True Full Screen in Firefox? In OSX, how do I have a true full screen? When I go to full screen mode, the tab and navigation bar are still showing. Those toolbars are annoying when I try to watch a movie, etc.

This is the shot of the top of the screen:

EDIT: I realized this may apply to other browsers such as Safari
On the about:config page search for the following key 

full-screen-api.allow-trusted-requests-only

and set it to false

Then you can create a bookmark 'link' with the following 'location':

javascript:document.getElementsByTagName('html')[0].mozRequestFullScreen();void(0)