New era in Smartphone Operating System it is Firefos OS.Mozilla is giving the simulator to see how it is going to function with the developer and to try it out.
                                               Firefox OS Simulator 3.0 is available to many operating Syatem like Windows,Linux,OS X and Run as extension on firefox browser good and easy to use.

        Features Added :-

                                  "Push to Device" Which automatically pushes the app from Firefox Simulator 3.0 to the device which connected through the USB cable.
                                   This updated also include features like "Rotation-Simulator",Geolocation API and new Firefox UI,Gaia.


Firefox OS Simulator 3.0 can be downloaded from Here :

               The Company is Focusing Low-income regions which Currently have Low Smartphone Penetration.Which is based on HTML5,Firefox Market Place say's hat they will offer App's like Games,News,Media, business and Productivity.

                            This "2013" is going to happy because we have lot of mobile Operating System ,such as Firefox, Tizen, Sailfish, Ubuntu.We will see which Operating System is Come after Android.

Via Cnet

Source Mozilla FTP Server