That’s the one issue I’ve had as well, and I think I’ve traced it to Firefox (this could easily be something that happens with other things as well) not using t

That’s the one issue I’ve had as well, and I think I’ve traced it to Firefox (this could easily be something that happens with other things as well) not using the correct font name when saving to PDF. Even if the CSS says “Arial”, it saves it with some strange name like “CFont+A2”. You can fix it by adding and entry to the font substitution table, but that definitely an area that still needs work.