Hi Edno,
I found your project while doing a github search for new development against the browsermob proxy. Development on the main browsermob proxy seems to have died in 2016. It is missing support for brotli, HTTP/2 and modern java versions. We have an active fork here we are building on that has those things. We don't support the deprecated legacy API, though. Anyhow, just thought I'd mention it. I also maintain the most popular Ruby browsermob client and we will be switching that over to this fork. Cheers,
Eric
https://github.com/browserup/browserup-proxy