Me neither, it really would benefit from a better documentation since I like the idea a lot.
I just tried it out and it seems to be tied to Chrome. Since I use Firefox and Chromium as my daily drivers this does not work for my case. I understand that they probably rely on some Chrome internals to dig through the content, a SOCKS Proxy approach would have worked better and would have no need to switch between a "save" and "serve" mode. But then again I was only scraping the top of it because of the lack of browser support. Will keep an eye on this one though!