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Youtube low FPS when put to fullscreen.

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I am having an issue where youtube videos played at higher quality stutter when put to fullscreen. Up till about 720p60 works fine, at 1080p60 and above the framerate becomes unstable.

Things I have tried: - I have tried going into media.media-capabilities.enabled and changing it from false to true - I have set network.buffer.cache.size to 262144 - I have disabled all my plugins - I have tried changing my user agent to windows/chrome

My current setup: Firefox 122.0, Macbook pro Sonoma 14.1, Apple M1 Pro chip

Curiously, if I make a new firefox profile and play a video there, there is no stutter. Does anyone have ideas on how I can fix my current profile?

I am having an issue where youtube videos played at higher quality stutter when put to fullscreen. Up till about 720p60 works fine, at 1080p60 and above the framerate becomes unstable. Things I have tried: - I have tried going into media.media-capabilities.enabled and changing it from false to true - I have set network.buffer.cache.size to 262144 - I have disabled all my plugins - I have tried changing my user agent to windows/chrome My current setup: Firefox 122.0, Macbook pro Sonoma 14.1, Apple M1 Pro chip Curiously, if I make a new firefox profile and play a video there, there is no stutter. Does anyone have ideas on how I can fix my current profile?

Chosen solution

Make sure hardware acceleration is enabled.

You can refresh your existing profile if you can't figure out what is wrong with it.

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All Replies (2)

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Chosen Solution

Make sure hardware acceleration is enabled.

You can refresh your existing profile if you can't figure out what is wrong with it.

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Couldn't figure out what was wrong in the end, and the problem persisted in troubleshooting mode but refreshing my profile fixed it... super odd. Thanks anyways!