Mozilla Fire Fox OS Mobile Phone (Boot to Gecko - B2G)

Mozilla group launched the Boot to Gecko (B2G) project to enable the Open Web as a platform for mobile devices. We’re making innovation possible by driving the development of new Web standards.

Firefox OS (project name: Boot to Gecko also known as B2G  is an open source operating system for smartphones and tablet computers being developed by Mozilla. It is an implementation of letting HTML5 applications integrate the device's hardware directly[clarification needed] by using JavaScript.[3] It has been demonstrated on Android-compatible smartphones Contents
On July 25, 2011, Dr. Andreas Gal, Director of Research at Mozilla Corporation, announced the "Boot to Gecko" Project on the mozilla.dev.platform mailing list. The project proposal was to "pursue the goal of building a complete, standalone operating system for the open web" in order to "find the gaps that keep web developers from being able to build apps that are —in every way— the equals of native apps built for BlackBerry 10, iPhone, Android, and WP7." The announcement identified these work areas: new Web APIs to expose device and OS capabilities such as telephone and camera, a privilege model to safely expose these to web pages, applications to prove these capabilities, and low-level code to boot an Android-compatible device.
This led to much blog coverage.

 According to Ars Technica, "Mozilla says that B2G is motivated by a desire to demonstrate that the standards-based open Web has the potential to be a competitive alternative to the existing single-vendor application development stacks offered by the dominant mobile operating systems.
In July 2012, Boot to Gecko was rebranded as 'Firefox OS', after Mozilla's well-known desktop browser, Firefox, and screenshots began appearing in August 2012.
In September 2012 analysts Strategy Analytics forecasted Firefox OS would account for 1% of the global smartphone market in 2013 – its first year of commercial availability