From MozillaWiki

General Information

B2G OS is a complete, standalone operating system for the open web.

Building B2G

Contributing

Please see the B2G/Hacking page and the Firefox OS Participation Hub.

Meetings

B2G Weekly Meeting

9am Pacific time every Tuesday.

Project Calendar

Web FxOS - Public Project Calendar (ICS).

More Information

For more developer information see the Firefox OS section on MDN.