Troubleshoot the "Secure Connection Failed" error message

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If Firefox can't access a secure site (one that starts with https) you will see an error page with the heading Secure Connection Failed and a message about the error.

Secure connection cannot be established

When a website you visit attempts to secure communication between your computer and the website, Firefox cross-checks this attempt to ensure that the certificate and the method the website is using are actually secure.

Website issues

Some websites try using out-dated (no longer secure) TLS mechanisms in an attempt to secure your connection. Firefox protects you by preventing navigation to such sites if there is a problem in securely establishing a connection. When this happens, you will see an error page with the option to report the error to Mozilla.

Fx45 Report SSL Errors

If you experience this problem, contact the owners of the website and ask them to update their TLS version to a version that is still current and still secure.

Other solutions

If you use an ESET security product such as NOD32 Antivirus or ESET Internet Security, turning off one of the following settings and then turning it back on may help eliminate the error.

  • Enable application protocol content filtering
  • Enable SSL/TLS protocol filtering

For detailed instructions, see this AskVG.com article. If you have questions or concerns about modifying these settings, please visit ESET support.

Certificate warnings

Firefox uses certificates on secure websites to ensure that your information is being sent to the intended recipient and can't be read by eavesdroppers. For a list of certificate warnings and error codes, see the article What does "Your connection is not secure" mean?.

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