One way to set one up on a Linux system is to make a user called kiosk; and set up the computer to run Mozilla in full screen mode and browse only the html pages that you want the user to see. It may take Mozilla 1.1 or later to do a full screen kiosk. I use Mozilla 1.2.1; and neither Mozilla 1.0.1 or 1.3 would go completely full screen on my setup. There is no command-line command that will do this; but you can make your Mozilla homepage a page with Javascript that will do the trick. The code and instructions are on this page at Mozilla Kiosk Mode.