Ah, I have dug a bit deeper. HTML 5 is probably the most accessible development language. XCode and Eclipse both require a fairly hefty (and expensive) develop

Ah, I have dug a bit deeper. HTML 5 is probably the most accessible development language. XCode and Eclipse both require a fairly hefty (and expensive) development machine to be usable. Whereas HTML 5 can be developed on any machine with a text editor and a browser. Hell, you can even code quite happily directly on the device if necessary. Mozilla are targeting the developers of less wealthy nations with their choice of platform. Makes sense.