Why is my CSS3 Transition not working in Firefox?

Question

It\'s working elsewhere on the site using the same CSS as far as I can tell. It works in Chrome. Here is the full page: anthonyotislawrence.com

Here\'s the part th

Answer 1

It looks like FF wont transition default values. They have to be declared on the original element before it will transition to the new properties.

Answer 2

I had an issue similar to the OP where my transitions worked in every browser except Firefox. In my case I had intervals of zero seconds. I used just a 0 and not 0s. This caused the transition to not work at all in Firefox. I don't think this was the issue for the OP but posting here in case it helps someone else.

This does not work in Firefox:

top 0 linear 1s

This works:

top 0s linear 1s