As posted earlier, Mozilla FireFox developer company is preparing a new Mobile Operating System called as Boot to Gecko or simply B2G for the smartphone market. B2G is purely based on the HTML5, Java script and CSS web programming language. According to Mozilla expectations, the first smartphone featuring B2G Os will be launched by this year end or early 2013. Below video shows the demo from one of the Mozilla programmer on simple customization options which can be done on B2G Os. B2G Os is ported to Samsung Galaxy S2 as prototype in this video.