Hilariously, I would probably tolerate the HTML version a lot better if it had the font from the PDF (and FWIW, the answer for me is "no: I don't work with LaTeX at all... I just read a lot of papers").
:root, [data-theme=light] {
/* --text-font-family: "freight-sans-pro";
}
> "Computer Modern" is used for body text to give it a professional/academic look