Setting an onXxxx attribute (such as onAddTrack) fails with NS_ERROR_XPC_CANT_MODIFY_PROP_ON_WN: Cannot modify properties of a WrappedNative This appears to be caused by IPeerConnectionObserver's methods being instantiated by xpconnect and added to mozPeerConnection (it appears).
When we are able to extend EventTarget in JS, we should be able to solve this.
Depends on: 731746
marking non-blocking. I believe we've worked around this, at most we have some leakage of unsettable properties into mozRTCPeerConnection - and I'm not sure it's still even visible to the outside world.
Whiteboard: [WebRTC], [blocking-webrtc+] → [WebRTC], [blocking-webrtc-]
Fixed long ago
Status: NEW → RESOLVED
Last Resolved: 5 years ago
Resolution: --- → WORKSFORME
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