From what I had heard of Firefox OS, one big advantage was that you could build an offline, locally-stored "app" that works on Firefox OS, Android, (and Windows/Mac/others?) with one code-base. However, after looking at the MDN Howtos, I can't seem to find the instructions on cross-compiling for other platforms.
With the Firefox OS simulator installed, I was able to install Firefox OS apps like-native with Windows and Ubuntu, but is there a guide to creating installers for non-FirefoxOS devices, or is this just a technology preview?
Are there any good examples of cross-platform apps written in Firefox, and compiled for multiple platforms, Ubuntu store, Windows store, and/or Android Market?