I have just bought a MacBook and its the first time I have used OS X so I am trying to get some little nuances out of the way. Is it possible for Firefox to automatically go on top of the dock or hide it so that I can stretch the browser's window to the edge of the screen? I know that you can turn on auto hiding for the Dock but I don't want to have that on all the time. I've attached a screen shot to show what I mean. Thanks!