I understand that this is the add on used to put Firefox in kisosk mode: *[https://addons.mozilla.org/en-US/firefox/addon/r-kiosk/] I would assume that there would have to be a preference to lock and share the device hardware in the user.js file: *[http://kb.mozillazine.org/User.js_file] After some more research it does not look like there is an about:config entry that controls this but this: *[https://github.com/nwjs/nw.js/wiki/Control-camera-and-microphone-with-getusermedia-api] *[https://developer.mozilla.org/en-US/docs/Web/API/Navigator/getUserMedia] I do not know exactly how to do this and I recommend asking in stackoverflow.com for more help: [https://support.mozilla.org/en-US/kb/where-go-developer-support Where to go for developer support]