When you open Firefox, you will notice (after installation), a ghostfox button in the statusbar.
To initiate ghostfox just click on the ghostfox statusbar button. Firefox window will resize immediately or disappear.
Hiding
The browser disappears if you move your mouse away from the browser area. This is what you do if someone is approaching your screen: just move the mouse pointer away (up is most convenient), and let the original application shine through. This move will send ghostfox into hiding, inactive but listening, and waiting for you to summon it back.
Showing
When you are ready to surf again, do the LEFT-RIGHT-LEFT movement: move the mouse all the way to
the left of the entire screen, then all the way to the right, and again all the way to the left.
ghostfox will show up again perfectly blended with your work screen, even if you changed it
meanwhile. But the page it will show will be exactly at the point where you were when you hid it
Terminating
To return firefox to its normal state, simply click the Ghostfox statusbar button. Firefox will return to normal.