In my webrtc video application when there is always a connection issue from chrome to firefox. If the user on Firefox joins first to the room and the 2nd user on chrome joins second then ther is no issue. It connects smoothly. But in the reverse case there is a connection but no audio and video. You can check the app at : https://uc.connectuscom.com/video/#k9EBX8xd#Video open one instance of this this link on chrome and then another on Firefox to reproduce the issue. Use 2 separate machines to avoid the issue of camera availability for the browsers.