Compare scrolling on Firefox vs Safari on http://www.breezie.com.
In addition to the jank, it looks like the page has some bad wheel event handling. I haven't looked at their code yet, but scrolling slowly over it, you can feel it jump every now and then, which is what would happen if they made DOMMouseScroll events (which are only dispatched for line scrolls) scroll by a line without calling preventDefault on the wheel pixel scroll events that come in between.
It feels pretty bad on Chrome and Safari as well scrolling on mac. As long as your fingers are on the touchpad it doesn't respond quite right, but once you lift and go into momentum scrolling it behaves much better.
Also, it behaves the same in FF with e10s disabled so it's not specifically an APZ bug. I want to move this to Tech Evangelism but it probably needs a bit more investigation first.
This seems to work much better now on all Firefoxen, maybe they changed something on their end. closing WFM but feel free to reopen if you still see issues.
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → WORKSFORME
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