This Firefox add-on enables quick access to hiding all open windows with an easy-to-use interface.
Alternatively, you can also use the keyboard shortcut F9 (Command+F9 on a Mac) to activate the Panic Button. The installation process is straightforward: create the Panic button, and when you need it, quickly click it to hide all of your Firefox windows.
Just customize your browser toolbar by choosing View | Toolbars | Customize on the Firefox menu bar, and then drag the Panic Button to your desired location. Don't worry about compatibility as the Panic Button add-on is cross-platform and works well with Mac OS X, Windows and Linux operating systems. Overall, Panic Button is a useful and efficient tool for those who value privacy and need a quick way to hide browser windows.
Version 1.1.2: N/A