Mozilla has been planning its attempt at a mobile OS for a long time. After being heavily rumored for months, it unveiled "Boot to Gecko" at MWC 2012, and in the year since has developed it into more of a fully-fledged operating system named Firefox OS. At launch, it'll be aimed at low-end, low-cost devices, and targeted at emerging markets. After that, it'll expand to the US and beyond in a broader attack on the market. You can find all our Firefox OS coverage right here, including up-to-date news, features, and videos.