HTTP/2 fingerprinting is a method by which web servers can identify which client is sending the request to them1. It can identify the browser type and version, for instance, or whether a script is used. The method relies on the internals of the HTTP/2 protocol which are less widely known that those of its simpler predecessor HTTP/1.1. In this post I will first give a short description of the HTTP/2 protocol, then provide details on how a web server can use the protocol’s various parameters ...
