tls/http2/quic/... fingerprinting: I don't think it's a good idea to do this with the entire chromium project, I prefer to implement it as a library in different languages, or as cronet bindings
js browser fingerprinting: I do have a chromium fork working on that, but it's in very early stage and closed-source now, maybe open source in the future :)
Do you have the code directly modify chromium originally code