Examining HTTP/3 usage one year on

This post provides a one-year retrospective on HTTP/3 usage across Cloudflare's network, detailing trends for browser traffic, API requests, and mitigated traffic. It analyzes the adoption of HTTP/3 by major browsers (Chrome, Safari, Edge, Firefox) and notes the continued low adoption by search engine and social media bots. The post also discusses the technical aspects of HTTP/3 discovery via Alt-Svc and HTTPS DNS records, and the transition from draft ALPN IDs to the final RFC 'h3'.