On Mobile devices there are essentially two initiatives Firefox Mobile and FirefoxOS.
Firefox Mobile (Fennec)
Bringing Firefox to mobile phones is the next step towards fulfilling Mozilla’s mission of providing access to one Web that everyone can access, regardless of device or location. The overall goals for Mobile Firefox are:
- Deliver an exceptional mobile experience to users, complete with the performance, personalization and security they expect.
- Do all of this work in the shared Mozilla source repositories so all platforms, desktop and mobile, benefit each other.
- "B2G" (Boot To Gecko) is the code name of Mozilla's project to develop an OS for Mobile devices entirely based on open Web technologies.
- Gaia is the collection of web apps which make up the front end of Firefox OS.