I'm developing an application using WebRTC and Data channels. I have no problem connecting data channels in chrome browsers across separate networks but, unable to connect data channels in Firefox browsers across separate networks. I always get iceConnectionState failed. I'm parsing the ICE candidate information from the SDP's 'a=' record after issuing a peerConn.createOffer. I then send this ICE candidate data across the signaling channel. Upon receiving the ICE candidate information on the receiving end I perform peerConn.addIceCandidate(candidate). However, nothing I have tried for the past several days is allowing the two Firefox browsers to connect the datachannels via WebRTC. I am however able to make the same code work across two Firefox browsers if they are both on the same network.