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Videos lag on YouTube after latest Firefox update.

This is where you describe the issue in detail.

Explain what’s happening (e.g., “Videos keep freezing after 10 seconds”).

Mention when it started and what you already tried.

Include your Firefox version (you can find it under Menu → Help → About Firefox).

This is where you describe the issue in detail. Explain what’s happening (e.g., “Videos keep freezing after 10 seconds”). Mention when it started and what you already tried. Include your Firefox version (you can find it under Menu → Help → About Firefox).

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Hi, After updating to Firefox 145.0 on Windows 11, I noticed that YouTube videos keep lagging and stuttering. The audio plays fine, but the video freezes or skips frames every few seconds.

This started right after the update. I’ve already tried:

Clearing cache and cookies

Disabling extensions

Turning off hardware acceleration

Restarting in Troubleshoot Mode

None of these fixed the issue. Other browsers (like Edge or Chrome) play YouTube videos smoothly, so it seems specific to Firefox.

Is there any known fix or setting I should change?

Thanks, Md. Saiful Islam

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