trewelu (http://forum.xda-developers.com/member.php?u=2844579) has built it from the source and this post contains a link for the rom. Check it out. [Screenshots included] Don't forget to thank trewelu! All credits go to him and I'm only directing you guys..
The original repo and instructions are here. http://neuralassembly.blogspot.com/2...irefox-os.html
May be some experienced dev give it a go with specially the small screen resolution issue with [Screenshots from my ray are attached]
$ export MOZILLA_OFFICIAL=1
$ export GAIA_DEV_PIXELS_PER_PX=2