WebRTC enables real-time communication directly in the browser — video calls, audio, data channels, and peer-to-peer file transfer. Firefox has strong WebRTC support. Here's the practical guide. What WebRTC Can Do Video/audio calls : getUserMedia captures camera/mic, RTCPeerConnection handles the connection Screen sharing : getDisplayMedia captures screen/window/tab P2P data : RTCDataChannel for low-latency peer-to-peer data transfer File transfer : Binary data ov...