https://shanetully.com/2014/09/a-dead-simple-webrtc-example/
https://github.com/muaz-khan/WebRTC-Experiment/tree/master/demos
https://github.com/pusher/pusher-webrtc-chat-demo/tree/master/src/_servers

http://blog.carbonfive.com/2014/10/16/webrtc-made-simple/
https://www.pubnub.com/blog/2015-08-25-webrtc-video-chat-app-in-20-lines-of-javascript/
https://www.webrtc-experiment.com/chat-hangout/
http://jsfiddle.net/bistri/cyc62/

http://www.html5rocks.com/en/tutorials/webrtc/datachannels/
http://blog.printf.net/articles/2013/05/17/webrtc-without-a-signaling-server/
http://www.html5rocks.com/en/tutorials/webrtc/infrastructure/

http://www.html5rocks.com/en/tutorials/webrtc/datachannels/
http://blog.printf.net/articles/2013/05/17/webrtc-without-a-signaling-server/

about:config
saerch peerconnection
search webrtc
search media.peerconnection.enabled

http://sipjs.com/
http://www.justgoscha.com/programming/2014/03/07/simple-webrtc-datachannel-establishment-for-dummies.html
https://github.com/stephenlb/webrtc-sdk/blob/gh-pages/js/webrtc.js
http://simpl.info/rtcdatachannel/