CSS3 animation and background-image in Firefox

Question

I have a bit of CSS3 animation in my website, and it works fine on Safari but when I run the site in Firefox, it doesn\'t animate. Here is the code:

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Answer 1

According to the latest working draft of the spec (14 August 2015), background-image is defined as non animatable.

Then, Firefox is just following the spec, and the behavior of browsers which animate background-image is non-standard and shouldn't be relied on.