I have FF as well, with loads of addons, none of them should interfere with the ratings. Can you see what I've highlighted below? We've recently made some changes to the ratings, so maybe try refreshing the page - Ctrl + F5.
Thanks for the replies all I can see is the word Reply In inspector it says flash is being blocked even though it is turned on..strange!
Hmm that's odd - I've just tried FF, IE, Edge and Chrome, and I see the ratings icon set in all 4. I'll do some troubleshooting.