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Youtube videos are over 8x slower in Firefox than other browsers.

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fcc248b9-ec90-4595-8bcb-60a3761013ac
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In Firefox my connection speed never goes above 9000 kbps whilst other browsers never drop below 60000 kbps.

What i have tried so far: Multiple different Internets and ISPs Installed nightly New profile without add-ons Firefox in safe mode Changed user agents "Disable polymer on YouTube" add-on

I'm thinking of deleting EVERYTHING Firefox related from my PC and starting from a totally clean plate. I would need help deleting everything Firefox related stuff. Suggestions welcome to fix it easier.

In Firefox my connection speed never goes above 9000 kbps whilst other browsers never drop below 60000 kbps. What i have tried so far: Multiple different Internets and ISPs Installed nightly New profile without add-ons Firefox in safe mode Changed user agents "Disable polymer on YouTube" add-on I'm thinking of deleting EVERYTHING Firefox related from my PC and starting from a totally clean plate. I would need help deleting everything Firefox related stuff. Suggestions welcome to fix it easier.

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cor-el
cor-el
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Did you try Windows Safe Mode as it is quite possible that this isn't a Firefox issue, but a problem caused by other software on your computer ?

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fcc248b9-ec90-4595-8bcb-60a3761013ac Lastnik vprašanja
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cor-el said
Did you try Windows Safe Mode as it is quite possible that this isn't a Firefox issue, but a problem caused by other software on your computer ?

As of posting this, I have tried Brave browser and ungoogled chromium. Brave worked for a little and then did the same. Ungoogled chromium did the same thing. Only Google Chrome and Chromium Edge are working like they are supposed to. So you are right, this isn't a Firefox issue. I just thought that because Chrome and Edge were working fine. I could try safe mode but would that help anymore?

Sheikh Azharuddin
Sheikh Azharuddin
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fcc248b9-ec90-4595-8bcb-60a3761013ac said

cor-el said
Did you try Windows Safe Mode as it is quite possible that this isn't a Firefox issue, but a problem caused by other software on your computer ?

As of posting this, I have tried Brave browser and ungoogled chromium. Brave worked for a little and then did the same. Ungoogled chromium did the same thing. Only Google Chrome and Chromium Edge are working like they are supposed to. So you are right, this isn't a Firefox issue. I just thought that because Chrome and Edge were working fine. I could try safe mode but would that help anymore?

try enabling http3 version and check once. youtube supports http3 but by default not enabled in firefox.

network.http.http3.enabled to True

Spremenil Sheikh Azharuddin