Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

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Error code: PR_END_OF_FILE_ERROR

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I have had to migrate many sites to another browser because Firefox won't load them. That is the error that appears.

I want to use Firefox, but am frustrated by the failure of various fix attempts to solve the problem.

Please help.

Lorin Cary

I have had to migrate many sites to another browser because Firefox won't load them. That is the error that appears. I want to use Firefox, but am frustrated by the failure of various fix attempts to solve the problem. Please help. Lorin Cary

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You can try to disable DNS over HTTPS.

You can check the connection settings and check for possible issues with a Proxy or VPN service.

  • Settings -> General -> Network: Connection -> Settings

If you do not need to use a Proxy to connect to internet, select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.

See also:

See also:

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Does it still happen in Troubleshoot Mode?