Created attachment 277133 [details] Testcase In attached testcase, Firefox and Chrome animate, and we pause. The shorthand should reset the longhands, so we get it wrong.
This was broken by the "add prefixing variant" stuff (bug 110011).
<rdar://problem/26219087>
This is fixed by https://bugs.webkit.org/show_bug.cgi?id=157569.
*** This bug has been marked as a duplicate of bug 157569 ***