This crawler can (hopefully) help you speed up converting existing MDN browser compatibility data to the new browser-compat-data format.
https://mdncrawler.glitch.me/crawl/. E.g. if you want to crawl
Report bugs to https://twitter.com/kaycebasques or email@example.com or https://github.com/kaycebasques/mdncrawler/issues/new. There's probably more that I can automate, so you are welcome to send me suggestions.