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How can I stop CPU usage from spiking when watching a HTML video?

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Meph
Meph
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Every time I watch a HTML5 video on any site, the CPU usage keeps fluctuating up to 90% or even 100%. When it does go up to 100%, the video (and the rest of Firefox) freezes for about half a second and then it goes back down to a slightly lower value.

How can I get it to stop doing that?

Every time I watch a HTML5 video on any site, the CPU usage keeps fluctuating up to 90% or even 100%. When it does go up to 100%, the video (and the rest of Firefox) freezes for about half a second and then it goes back down to a slightly lower value. How can I get it to stop doing that?

Modified by Meph