User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:26.0) Gecko/20100101 Firefox/26.0 (Beta/Release) Build ID: 20131205075310 Steps to reproduce: <div (animation transform)> <div (animation transform)></div> </div> Actual results: проподают элементы Expected results: не должны проподать

в первой открытке (не работает) <div (animation transform)> <div (animation transform)></div> </div> во второй (пример как должно работать) <div (animation css-left)> <div (animation transform)></div> </div>

Hi! Please translate this to English and provide exact steps to reproduce. Thanks!

// I do not speak English 1) open snow.html in Firefox and Chrome 2) compare does not work <div (animation transform)> <div (animation transform)></div> </div>

I can confirm that on the top rectangle snowflakes generally disappear once they get about 30-40px from the top, with a few exceptions. Some sort of layerization bug? I see this on Mac too.

> 1) open snow.html in Firefox and Chrome > 2) compare For what it's worth: in Chrome (version 33.0.1750.5 dev) on my Linux machine, the snowflakes *all* stick at the top of the images. They move left and right but never fall. (not sure why)

Yeah, I see that on Mac too, but I assume that's a Chrome dev bug. Chrome 31 release works correctly.

Same regression range as bug 946920 http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=eccf45749400&tochange=7433bc4545c9 but I didn't narrow it any further. But I'm going to guess bug 849263 again. Seems to be a depth issue, getting rid of the background on the div you can see the snowflakes if you give the page a non-white background color.

This was fixed by bug 944291.

Verified as fixed on latest Aurora 28.0a2 as well using Ubuntu 12.04 x32 and Windown 8.1 x32