Mozilla officially jumped into the crowded mobile OS field at Mobile World Congress in Barcelona, where the company demonstrated an early version of Firefox OS, which is being developed under the Boot to Gecko project.
Mozilla's developers have been using the Samsung Galaxy S II to write and test Firefox OS. The Galaxy S II is a smartphone that originally runs Android 4.0.3. It comes with a 4.3-inch screen and a Qualcomm processor. The final reference device -- the first to be sold with Firefox OS on it -- probably will have different (and likely more powerful) specification. Such phones will be manufactured by Alcatel and ZTE.