User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0 Build ID: 20160606200529 Firefox for Android Steps to reproduce: The "Asteriods Test3 - Asteroids, Shapes Shadows, Blending" benchmark of the CanvasMark benchmark suite stutters a lot when running it with Firefox on Android - while rendering is very fluent with Chrome, the Android 4.4.4 stock browser and with the Blackberry-10 stack browser. I've created a stand-alone version of the mentioned test, available at: http://126.96.36.199/CanvasMarkFirefox/ Tested on: LG G4 Dual, Snapdragon 808, Android Marshmallow Alcatel One Touch Pop 2 4,5, Snapdragon 410, Android 4.4.4 Blackberry Q10 (with rendering artifacts)
Using Firefox 50 and a Nexus 5x I don't see stuttering. Chrome 53 just crashes on the website before the test finishes.
Firefox-48b4 vs Chrome-51 on Nexus 5x: https://youtu.be/fMAvjyOlJww Not only is the animation with Chrome smoother, the benchmark renders 2-3x more particles than with FF (as it tries to achieve a fixed frame-rate by reduding content).
Please test using Nightly 50.0 https://nightly.mozilla.org 48.0 code has been frozen for over 12 weeks.
(of course) still reproduceable with 50b1
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