Hi List,

For a connectivity detection app (www.check-connectivity.com) i am working on i 
need to start the ICE operation on Firefox without asking for Camera or Mic 
permission from the user. I can do that in Chrome and thus successfully 
determine UDP/TCP connectivity of the client...

But i cannot do the same on firefox... When i perform a 
"RTCPeerConnection.createOffer()" on Firefox it will error with: "Cannot create 
SDP without any streams.".

I have a stub page at http://www.check-connectivity.com/rtc which demonstrates 
how it works on Chrome and not on Firefox... 

It's funny how i could not find the definition of the Constraints Object on MDN 
docs for RTCPeerConnection 
(https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection#createOffer),
 please help me.

Thank you
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