Changed API to https://protondb.max-p.me so it can work again.

https://spcr.netlify.com made the testing results basically inaccessible, so this script can't work anymore until that changes. Sorry.

I'm using the GM* methods now, if they're available. That should fix this problem.

The name of the method in the latest Greasemonkey is GM.xmlhttpRequest, so this isn't a cross-extension solution. I've only ever tested it on Firefox with GM.

I guess you're using Tampermonkey and it didn't work there?

I suppose that fixed it for you? If so, I'll absorb that change.