I should note that the browser on Boot2Gecko is really not related to Firefox on Linux at all, outside of using the same Gecko renderer underneath. B2G -- unlik

I should note that the browser on Boot2Gecko is really not related to Firefox on Linux at all, outside of using the same Gecko renderer underneath. B2G -- unlike Firefox -- doesn't require X, doesn't support extensions, and the browser chrome and all that is actually just a web app itself. So sure, it shares a renderer, but it's like saying that ChromeOS is powered by Safari. (Disclaimer: I work for Mozilla on Boot2Gecko.)