BananaBread – a browser-based 3D shoot ’em up
Mozilla has also announced full support for the WebRTC (Web Real Time Communication) standard in Firefox 22. This standard enables real-time peer-to-peer audio and video communications. WebRTC is used for chat between players in BananaBread.
All the code in this project is open (and practically all the art assets), so others can learn from this effort and use this code to create their own browser games.
There’s a demo available if you fancy your chances or are just curious.