Firefox OS is currently under heavy development; we are constantly working on ways to make it easier for you to use and hack on Gaia (the default set of apps) and create your own. However, you need knowledge about systems in order to do things like build the entire Firefox OS stack, or flash a phone with a build of Firefox OS. Linked below are guides meant for Web developers interested in running and making changes to Gaia or developing apps to run on Firefox OS devices.
Documentation about the Firefox OS platform, including Gonk, Gaia, and everything in between. This includes documentation for building and installing the platform onto devices, as well as building the simulator and emulators.