Find your Firefox icon, and drag it to the Start menu, hold and pause, and when the menu appears, drag it up to All programs, hold and pause, and when the All programs list displays, drag it to the Startup folder, hold, and when the contents of that folder displays, drag it across and release.

This might or might not work

Thanks Moses. It worked. Firefox now opens automatically. And I can use the technique will be good for other purposes. Regards ~ John