peerjs/lib/adapter.js

exports.RTCSessionDescription = window.mozRTCSessionDescription || window.RTCSessionDescription;
exports.RTCPeerConnection = window.mozRTCPeerConnection || window.webkitRTCPeerConnection || window.RTCPeerConnection;
exports.RTCIceCandidate = window.mozRTCIceCandidate || window.RTCIceCandidate;