Your requests may look like a real browser, but they’re still getting blocked. That’s because modern systems analyze protocol behavior, not just headers. Even when requests include realistic headers, they can still be detected if HTTP/2 behavior, such as header ordering, pseudo-header structure, and frame sequencing, does not match real browsers. These low-level inconsistencies reduce stability and reliability, making automated traffic easier to identify. What is HTTP/2 header ordering? In HTTP/2, headers are sent in a structured format that includes both: pseudo-headers (e.g. :method , :path , :authority ) regular headers (e.g. user-agent , accept , cookie ) Unlike HTTP/1.1, the order and structure of these headers matter . Real browsers follow consistent patterns: pseudo-headers come first headers follow a predictable sequence encoding and compression behave consistently These patterns form part of a client’s identity. Why does header ordering matter?…