User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 Build ID: 20141126041045 Steps to reproduce: This seems (in my case) to be limited to the OnePlus One, as I've been unable to reproduce on a Galaxy S4 or Nexus 7 2013. OnePlus One Android 4.4.4 (stock CM builds) FFv34.0 It seems that most gfycat HTML videos have this issue, as well as liveleak videos. Example URL: http://www.liveleak.com/view?i=2e8_1418016501 Open the video and play it. Actual results: The video played with artifacting so heavy you can't make out the video, even though it does play as it should, with audio. Expected results: The video should have played the video without artifacting. The video *does* work correctly on FF Beta (V35).
Thanks for the report. Let's mark this fixed via new media backend which will ship in Firefox 35 (we're evaluating risk for Firefox 34 currently).