WebkitGTK implementations don't currently support WebRTC

[maschad]

I did some more research/testing and found that WebkitGTK (the full-featured port of the WebKit rendering engine on Linux-based OS's) does not yet support the PeerConnection API. Igalia is currently working on the implementation but this is obviously a blocker for Playwright supporting this interface as per the docs

Thanks to @MarcoPolo for pointing me in this direction.

Originally posted by @maschad in libp2p/js-libp2p-webrtc#177 (comment)

I suppose this is why this it marked as experimental

[dhuseby]

@maschad to run some tests on CI to see if this is unblocked

[dhuseby]

Still blocked due to WebKit not fully supporting WebRTC