Yep, I ran it on an old windows 10 VM I had puttering about.
I think it must have a default link styling somewhere, as some links are the classic blue that as far as I know I intentionally styled to be black- but this could be css spaghetti in tufte.css finally coming to haunt me.
Well, that's how this browser came to be, because I felt something similar to with how Cursor presented their results :) So I guess we're in the same club, somehow.
And yeah, lots of websites render poorly, for obvious reasons, if it's better or worse than Cursor's I guess will be up to the public, I'm sure if I actually treated it as a professional project I could probably get it to work quite nicely rather than the abomination it currently is.