[rquirk]

Unfortunately there is a flaw in this design of Firefox OS. By baking the rendering engine into the core OS, it is impossible to upgrade the browser separately from the rest of the system. So updating Firefox (the browser) requires a firmware update, and we all know how terrible manufacturers and carriers are at pushing out updates. The result is that all Firefox OS devices currently available are running old and insecure browsers.

Here is an explanation from the mailing list, so at least Mozilla are aware of the issue. https://groups.google.com/forum/?_escaped_fragment_=msg/mozi...

> The reason for this is because gecko determines how the user interface > (implemented in the gaia layer) actually behaves. There may be bugs in future > versions of gecko that break parts of the UI, and the carriers/manufacturers > understandably don't want to just push these updates without verifying them > first.