On Mac, compared to Safari, this demo is not smooth: http://mozillademos.allizom.org/demos/shadows/demo.html (login information: https://intranet.mozilla.org/WebOWonder) Open the link, click on a frame to see the animation (transition on transform).
Which animation is not smooth? What do I click and where?
The transition from "original position" to "frame", and "frame" to "frame". Click on an empty frame to active the transition.
What do you mean by "frame"?
The headless bodies.
The site is now public? Should we morph this into a public bug with a reduced testcase on what is slow here now?
no, this demo is not public yet (next week).
Is this still an Issue? FWIW, I see the Issue with Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0.1) Gecko/20100101 Firefox/4.0.1 ID:20110413222027 CSet: fca718600ca0 (what was recent with Comment 0) WFM with Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20130320 Firefox/22.0 ID:20130320031103 CSet: 8156df33b757
Works for me.