User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:64.0) Gecko/20100101 Firefox/64.0 Steps to reproduce: Visit https://www.golem.de/news/imho-unnoetige-sicherheitsrisiken-mit-linux-1810-136892.html Start scrolling down with the mouse wheel. Actual results: The copyright notice on the right of the picture of the Linux penguin moves across the page to the left while scrolling, until it disappears from the viewport. If you scroll up again it stays hidden. After doing a tab switch, the element is there again. Using the arrow keys doesn't move the element.

Another example: https://www.camp-firefox.de/forum/viewforum.php?f=1 The arrow icon of the highlighted box moves across the page: https://abload.de/img/unbenanntkuesy.png

mozregression --good 2018-10-03 --bad 2018-10-04 --pref gfx.webrender.all:true -a https://www.golem.de/news/imho-unnoetige-sicherheitsrisiken-mit-linux-1810-136892.html > 4:19.75 INFO: Last good revision: 831c1cae9dde0bd0f2eff1023fbe80afef8d8e8d > 4:19.75 INFO: First bad revision: 4526e08d44775dd3c32ce27c16d96e4b995eea60 > 4:19.75 INFO: Pushlog: > https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=831c1cae9dde0bd0f2eff1023fbe80afef8d8e8d&tochange=4526e08d44775dd3c32ce27c16d96e4b995eea60 > 4526e08d4477 Jeff Muizelaar — Bug 1495228. Re-generate FFI header > 3e45393406be Jeff Muizelaar — Bug 1495228 - Api change from PR#3147. > 1eb163b766fd Kartikaya Gupta — Bug 1415272 - Enable perspective-scrolling-3 as it passes with WR PR 3154. r=jrmuizel > a351e7a11b2c Jeff Muizelaar — Bug 1495228. Update webrender to commit 9536249e3ed920a920346f6cc0a79473cad16099 Regression range: https://github.com/servo/webrender/compare/d7a6d081384ce0da9dd359b0cf4b9f758aab1b67...9536249e3ed920a920346f6cc0a79473cad16099 https://github.com/servo/webrender/pull/3145#issuecomment-425709527 mozregression --repo try --launch a03726cfc8516204b07957a0a38e96d84e1a48f4 --pref gfx.webrender.all:true -a https://www.golem.de/news/imho-unnoetige-sicherheitsrisiken-mit-linux-1810-136892.html good https://github.com/servo/webrender/pull/3149#issuecomment-426084544 mozregression --repo try --launch 79ebd8293327b257b8dfeab4696eb699499c88ce --pref gfx.webrender.all:true -a https://www.golem.de/news/imho-unnoetige-sicherheitsrisiken-mit-linux-1810-136892.html good https://github.com/servo/webrender/pull/3153#issuecomment-426264904 mozregression --repo try --launch a9456f153a36d064d9ef0a163b7814b3d3adce63 --pref gfx.webrender.all:true -a https://www.golem.de/news/imho-unnoetige-sicherheitsrisiken-mit-linux-1810-136892.html good https://github.com/servo/webrender/pull/3154#issuecomment-426325620 mozregression --repo try --launch fd156919846cdc951c47d94e2c8df7b0df64fa47 --pref gfx.webrender.all:true -a https://www.golem.de/news/imho-unnoetige-sicherheitsrisiken-mit-linux-1810-136892.html bad Likely regressed by servo/webrender#3154.

twitter video play buttons also have this problem

I'll see if a backout of servo/webrender#3154 fixes this.

https://www.youtube.com/watch?v=cRSO3RtUOOk Thumbs up/down and verified account badges.

Yes, the backout worked. https://treeherder.mozilla.org/#/jobs?repo=try&revision=746058eee0895ccfaa511c986af1ee60cc51f14c

I landed the backout on mozilla-inbound directly: https://hg.mozilla.org/integration/mozilla-inbound/rev/4bcce93eae6401679746dda3cd7c192aba62f4f5 I'll use this bug to land a reftest to prevent this from happening again.

https://data.firefox.com/dashboard/usage-behavior Scroll down without hovering the diagrams.

Yeah it's pretty much anything with a 2D non-translation transform (i.e. rotation or skew). Try push with a reftest: https://treeherder.mozilla.org/#/jobs?repo=try&revision=d6e6b8b9a2c8656d32631e3cc2e6b9ab91be0e30

Pushed by kgupta@mozilla.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/52029571d897 Add a reftest for async-scrolling content with 2D rotation transforms. r=mstange