I didn't notice that -moz-animation-play-state wasn't part of the -moz-animation shorthand, so I implemented it as part of the shorthand. It's currently being discussed on www-style, so it might change, though: http://lists.w3.org/Archives/Public/www-style/2011May/0082.html
Created attachment 530792 [details] [diff] [review] patch
Comment on attachment 530792 [details] [diff] [review] patch r=me
Comment on attachment 530792 [details] [diff] [review] patch This is a very straightforward patch to our animations support to match the spec and WebKit; just something that I misread in the spec. It has good test coverage, so I think it's very low risk.
Please land for Aurora by Monday May 16 or the approval will potentially be lost. Please mark as status-firefox5 fixed when you do.