Every last one of the challenges works just fine in Firefox BTW. Even Safari and Edge work well nowadays. The challenge tests are just really persnickety about how they test for a proper solution, and extra whitespace throws them off.
oh my gosh, you were the only answer that solved my problem! I had semi-colons separating the two fonts. That was my issue! I started to get scared because everyone was saying to use Chrome, which I already was using! Thank you!