Mozilla has finally added Kiosk mode to its Firefox web browser, 18 years after the feature was initially requested. With the new ‘--kiosk’ command line option, Windows users can allow the browser to launch in kiosk mode which prevents users from accessing other parts of the operating system making it perfect for shops, libraries, and other terminals.
When it’s in kiosk mode, Firefox removes access to items such as the menu bar and context menu, limits keyboard access, and disables the F11 button. These actions prevent users from exiting kiosk mode easily to tamper with the rest of the system. The current implementation is on parity with that available in Google Chrome. With the upcoming second phase, more Firefox-specific features will be added.
Enabling kiosk mode on Firefox is fairly straight forward; download the latest nightly update then right-click on the app and create a desktop shortcut called Firefox Kiosk or something similar. From there, right-click the new shortcut and select Properties. In the target field add ‘--kiosk’ without quotes to the end of the command and press apply. If you’d like a custom page to open on launch you can add something like ‘--kiosk “https://google.com”’ without the single quotes.
Optionally, you can use ‘--kiosk -printing’ which allows printing without the print dialog whenever the print command or Ctrl+P is used. Finally, to end a kiosk session just hit Alt+F4. Firefox 71, which is expected to include kiosk mode is due to launch on December 3.