This seems to be built on top of WebRTC, using data channels ? I believe at least Safari doesn't support that, but their github readme does seem to imply suppor

This seems to be built on top of WebRTC, using data channels ? I believe at least Safari doesn't support that, but their github readme does seem to imply support on Safari. Also, since it's based on WebRTC, who's responsible for setting up the STUN/TURN server?