Normally, when the browser does not support WebRTC, ipcalf shows
ifconfig | grep inet | grep -v inet6 | cut -d" " -f2 | tail -n1
Nevertheless, Edge only shows - in net.ipcalf.com.
And the console shows the following error:
SCRIPT438: Object doesn't support property or method 'createDataChannel'
net.ipcalf.com (18,9)
It looks like there is webkitRTCPeerConnection in Edge, but there is no createDataChannel in its webkitRTCPeerConnection
Version
Microsoft Edge 40.15063.0.0