Firefox OS is a Linux-based open-source operating system for smartphones and tablet computers. It is being developed by Mozilla, the non-profit organization best known for the Firefox web browser. It is designed to provide a complete community-based alternative system for mobile devices.
A Firefox OS ROM has been complied by XDA senior member pureexe for Google Nexus 4. This ROM is still in the experimental stages and there are some bugs – camera and MTP/PTP are not fully functional. But soon, a fully working ROM will arrive. Nexus 4 users who want to try out this ROM can follow the instructions given below.