It is pretty much web development. My method is to shrink a browser down to mobile size and create something in HTML/CSS/JS as if you were creating it for a mob

It is pretty much web development. My method is to shrink a browser down to mobile size and create something in HTML/CSS/JS as if you were creating it for a mobile browser. If it works as a web app, it should work as a FirefoxOS app. You can download the FirefoxOS simulator as a Firefox add-on for free to have a play about with it: https://addons.mozilla.org/en-US/firefox/addon/firefox-os-simulator/ https://addons.mozilla.org/en-US/firefox/addon/firefox-os-si...