[Bug 1487980] Re: firefox and xorg high cpu usage when render html5

[ghomem]

Currently youtube is unusable due to high cpu usage from Xorg:

Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
Ubuntu 12.04
Firefox 40.0.3

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Title:
  firefox and xorg high cpu usage when render html5

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