One of the promises that comes with HTML5 mobile apps, especially those to be featured on Firefox OS, is that your existing web applications, if created properly (feature detection, responsive design, etc.), can be turned into a working mobile application in relatively little time. And that's the way it should be, right? If my app works in the device's browser, shouldn't it work perfectly as a standalone app? Let's say you have a responsive, well-written website/app and you want to let Firefox OS users experience your work as a first class app; the following few steps will help you make those Firefox OS app dreams a reality.