Been keeping up with Mozilla Labs' Apps project? Today the company's focused on developers, with pleasing news if you've been looking to get your app's feet wet in it. In the coming weeks at Mobile World Congress, the Firefox maker will finally open its self-titled Marketplace's doors for app submissions. If you're unfamiliar, Mozilla's been working to create an "operating system- and device-independent market," based on its own APIs, HTML5 and other open source materials. The end re
