Firefox 13 will be the first version of the Mozilla Firefox browser to have Marketplace. It will have an app launcher as part of the Home Tab app launcher. Firefox 13 will be released at the beginning of June. Boot to Gecko (B2G), Mozilla’s upcoming smartphone and tablet operating system, will also be using the Marketplace. It will be open source so carriers will be able to create their own Open Web Marketplace and populate it with their own apps. B2G is a cut-down version of Linux that loads Gecko, the rendering engine behind Firefox.