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Choppy, stuttering embedded video on Firefox browser for Windows 10

Firefox Audio and Video
operationblackoutcp
operationblackoutcp

Here is a video which would demonstrate it best: https://youtu.be/MpHX4Ep-IMM

These two comparison are made between Firefox 158.0 (64 bit) in Troubleshoot Mode and Brave 1.97.59 (64 bit), on Windows 10, version 22H2. I use the 30MB Big Buck Bunny version on test-videos.co.uk site, Firefox seems able to load the 1MB, or 2MB version pretty smoothly, but higher than that, it starts to stutter, for some reasons I cannot understand.

(Most results I can find online tell me to "disable hardware acceleration", but I have been turning that setting on and off multiple times without seeing any changes)

Ironically, videos on Youtube can load normally without issues. It just seems any embedded videos would behave oddly like this, which I encounter most often on Discord.

Please, I would appreciate any insights. I can provide additional information if needed. Thanks in advance.

Here is a video which would demonstrate it best: https://youtu.be/MpHX4Ep-IMM These two comparison are made between Firefox 158.0 (64 bit) in Troubleshoot Mode and Brave 1.97.59 (64 bit), on Windows 10, version 22H2. I use the 30MB Big Buck Bunny version on test-videos.co.uk site, Firefox seems able to load the 1MB, or 2MB version pretty smoothly, but higher than that, it starts to stutter, for some reasons I cannot understand. (Most results I can find online tell me to "disable hardware acceleration", but I have been turning that setting on and off multiple times without seeing any changes) Ironically, videos on Youtube can load normally without issues. It just seems any embedded videos would behave oddly like this, which I encounter most often on Discord. Please, I would appreciate any insights. I can provide additional information if needed. Thanks in advance.

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