Panic Button

[norbit09]

Don't want the boss to catch you surfing the Web on company time? Don't want your teacher, classmates, roommate or significant other to see the Web sites you're viewing? With Panic Button, a single click of a toolbar button will quickly hide all Firefox windows -- bring them back by clicking a button on the Restore Session toolbar. The Panic Button action can also be invoked by pressing F9 (Command+F9 on the Macintosh).

After installing Panic Button, add the Panic Button button to the browser toolbar by choosing View -> Toolbars -> Customize on the Firefox menu bar, then dragging the Panic Button to the desired location.


https://addons.mozilla.org/en-US/firefox/addon/6990