Thanks for reporting! As you said the issue happens recently, would you mind to try to use [mozregression](https://mozilla.github.io/mozregression/) to find out the culprit? Also, would you mind to paste your `about:support`? (In reply to mariacastro769 from comment #1) > It can't be my hardware. I was on 10% CPU load and <20% RAM usage when the problem happened. My bandwidth also never was a problem before with 500MBit and glass fiber. True, the video captured in profiler is actually pretty low resolution, so the problem isn't the decoding speed. I'm still checking the profiled result, will update more information if I find anything. Thanks.
Bug 1770943 Comment 3 Edit History
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Thanks for reporting! As you said the issue happens recently, would you mind to try to use [mozregression](https://mozilla.github.io/mozregression/) to find out the culprit? Also, would you mind to paste your `about:support`? (In reply to mariacastro769 from comment #1) > It can't be my hardware. I was on 10% CPU load and <20% RAM usage when the problem happened. My bandwidth also never was a problem before with 500MBit and glass fiber. True, the video captured in profiler is actually pretty low resolution, so the problem isn't the decoding speed. I'm still checking the profiled result, will update more information if I find anything. Thanks. --- Could you help me confirm what codec those shuttering video are using? On Youtube, you can use ` stats for nerds` when you right click on the video. On Twitch, you can see `Video Stats` from `setting` on their player. Thank you.