HTTP/3
The newest version of HTTP that runs over the QUIC protocol on UDP instead of TCP, making connections faster and more resilient, especially on mobile and unstable networks.
Full Definition
HTTP/3 is the third major version of the HTTP protocol, built on top of QUIC (Quick UDP Internet Connections) instead of TCP. By using UDP with built-in encryption, TLS 1.3, and stream multiplexing at the transport layer, HTTP/3 eliminates head-of-line blocking and reduces connection setup latency. Connections survive network changes (like switching from Wi-Fi to mobile data) without re-establishing. From a fingerprinting perspective, HTTP/3 QUIC fingerprinting is an emerging anti-bot signal. Most modern browsers support HTTP/3, but most scraping libraries do not, creating another detectable discrepancy.
