High CPU watching Amazon Prime Video movie

[harlan4096]

<p><strong>Reproduction steps:</strong></p>
<p><span>No special steps, just open FireFox 70.0.1 x64  and select a movie in Amazon Prime Video.</span></p>
<p><span></span></p>
<p><span>There is high CPU, and also sometimes even affecting the sound of the movie...</span></p>
<p><span></span></p>
<p><strong>Actual result:</strong></p>
<p><span>High CPU, sound is affected sometimes in some scenes and not fluent video image...</span></p>
<p><span></span></p>
<p><span>CPU Screen-shots:</span></p>
<p><span></span></p>
<p><span><img src="https://cloud.qainfo.ru/index.php/apps/files_sharing/ajax/publicpreview.php?x=1658&amp;y=534&amp;a=true&amp;file=S2.png&amp;t=Bkzx0jdzbc4HJyc&amp;scalingup=0" alt="" width="816" height="534" /></span></p>
<p><span><img src="https://cloud.qainfo.ru/index.php/apps/files_sharing/ajax/publicpreview.php?x=1658&amp;y=534&amp;a=true&amp;file=S3.png&amp;t=z2pIu19PYOi5LRq&amp;scalingup=0" alt="" width="816" height="534" /></span></p>
<p><span><img src="https://cloud.qainfo.ru/index.php/apps/files_sharing/ajax/publicpreview.php?x=1658&amp;y=534&amp;a=true&amp;file=S4.png&amp;t=W8Pg2SX4PS3D866&amp;scalingup=0" alt="" width="816" height="534" /></span></p>
<p><span></span></p>
<p><span>Perf Traces attached...</span></p>

[Jarvis]

@harlan4096, hello! Can you also send KTS logs (+new perf traces)?<br>Thanks in advance.

[harlan4096]

<p>Here You are: https://cloud.qainfo.ru/s/hU59mOyiksKfRpl</p>