Created attachment 537464 [details] Simple testcase for this bug The -moz-animation shorthand does not accept the unitless 0 as value for delay, it requires "0s". If you ommit the "s", the rule can't be parsed: This works: -moz-animation: pulse 3s ease-out 0s infinite normal; This doesn't: -moz-animation: pulse 3s ease-out 0 infinite normal; Since "0" is a valid value for the delay (http://www.w3.org/TR/css3-animations/#the-animation-delay-property-), it should also be accepted in the shorthand.
Also, "none" is accepted as the delay value, but it's nowhere in the spec.
If you open the testcase in a Webkit browser, it will animate all the three divs. Firefox only animates the first one and the third.
> Since "0" is a valid value for the delay (http://www.w3.org/TR/css3-animations/#the-animation-delay-property-) That draft is just wrong. See http://lists.w3.org/Archives/Public/www-style/2011May/0002.html
> Also, "none" is accepted as the delay value, No, it's not. Your shorthand using "none" is: animation: pulse 3s ease-out none infinite normal; And this is being parsed as: animation-name: pulse; animation-duration: 3s; animation-timing-function: ease-out; animation-fill-mode: none; animation-iteration-count: infinite; animation-direction: normal; with no animation-delay specified at all. Note also that you're looking at a very out-of-date draft that doesn't even mention animation-fill-mode; the current draft of animations is at http://dev.w3.org/csswg/css3-animations/