How is this possible? Firefox OS is build on HTML which has its advantages and disadvantages, but in this case one of the biggest advantages of using HTML (which is that it can be interpreted by a web browser) is what makes it possible to run a Firefox OS app on Android.
So how can i do it?
I downloaded an app, but how can i run it? Since it is downloaded in the browser, it will have to be opened from the firefox browser, similar to how a web browser extension works on your desktop computer.