Test network APIs including local network access, server-sent events, WebTransport, cross-tab messaging, and beacons.
Test access to local/private network resources (192.168.x.x, localhost).
Test the EventSource API for receiving real-time server-sent events.
Test WebTransport API availability for low-latency bidirectional communication.
Test the Broadcast Channel API for cross-tab and cross-window messaging.
Test the Beacon API for reliable asynchronous data transmission.
Test WebRTC support, ICE candidate gathering, and IP handling policy.
Test the Direct Sockets API: raw TCP and UDP socket access.