Which browsers do support flow control feature of HTTP/2?

Question

Recently, some browsers support HTTP/2. This picture shows all versions of browsers support HTTP/2

And HTTP/2 has new features such as flow control which is implemented by setting WINDOW_UPDATE frame. Do you know which version of browsers support flow control and allow users to configure WINDOW_UPDATE frame by javascript or something else

Answer 1

All browsers support flow control, it's a mandatory part of the spec. Section 5.2.1 of RFC 7540 explicitly says that "Flow control cannot be disabled.". I don't know of any browser that gives any sort of control to the javascript.

HTTP/2 clients for scripting languages such as Hyper (in python) or http-2 (in ruby) do give fine grained access to the protocol however.