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Firefox will not let me go on any website, because they are not secure.

Posted

Every website is saying that I am not allowed to enter because they are not secure. This has happened for every website as well as their own mozilla support website. I am able to 'add exemption' for some website but this is not available for all for example Netflix.co.uk.

Every website is saying that I am not allowed to enter because they are not secure. This has happened for every website as well as their own mozilla support website. I am able to 'add exemption' for some website but this is not available for all for example Netflix.co.uk.

Additional System Details

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36 Edge/17.17134

More Information

FredMcD
  • Top 10 Contributor
4248 solutions 59433 answers
What is the exact error message? There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connections and send their own certificate. https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message https://support.mozilla.org/en-US/kb/connection-untrusted-error-message http://kb.mozillazine.org/Error_loading_websites
cor-el
  • Top 10 Contributor
  • Moderator
17483 solutions 158000 answers

You can check the date and time and time zone in the clock on your computer: (double) click the clock icon on the Windows Taskbar.


You can check if there is more detail available about the issuer of the certificate.

  • click the "Advanced" button show more detail
  • click the blue SEC_ERROR_UNKNOWN_ISSUER message to show the certificate chain
  • click "Copy text to clipboard" and paste the base64 certificate chain text in a reply

If clicking the SEC_ERROR_UNKNOWN_ISSUER text doesn't provide the certificate chain then try these steps to inspect the certificate.

  • open the Server tab in the Certificate Manager
    • Options/Preferences -> Privacy & Security
      Certificates: View Certificates -> Servers: "Add Exception"
  • paste the URL of the website (https://xxx.xxx) in it's Location field.

Let Firefox retrieve the certificate -> "Get Certificate"

  • click the "View" button and inspect the certificate

You can see detail like the issuer of the certificate and intermediate certificates in the Details tab.

You can check the date and time and time zone in the clock on your computer: (double) click the clock icon on the Windows Taskbar. *https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean *https://support.mozilla.org/en-US/kb/troubleshoot-time-errors-secure-websites *https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message ---- You can check if there is more detail available about the issuer of the certificate. *click the "Advanced" button show more detail *click the blue SEC_ERROR_UNKNOWN_ISSUER message to show the certificate chain *click "Copy text to clipboard" and paste the base64 certificate chain text in a reply If clicking the SEC_ERROR_UNKNOWN_ISSUER text doesn't provide the certificate chain then try these steps to inspect the certificate. *open the Server tab in the Certificate Manager **Options/Preferences -> Privacy & Security<br>Certificates: View Certificates -> Servers: "Add Exception" *paste the URL of the website (https://xxx.xxx) in it's Location field. Let Firefox retrieve the certificate -> "Get Certificate" *click the "View" button and inspect the certificate You can see detail like the issuer of the certificate and intermediate certificates in the Details tab.