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

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

firefox fresh install not working on fresh windows 10 install

  • 3 ŋuɖoɖowo
  • 1 masɔmasɔ sia le esi
  • 9 views
  • Nuɖoɖo mlɔetɔ FredMcD

more options

I did a fresh install of windows and a fresh install of firefox and in getting SEC_ERROR_UNKNOWN_ISSUER every time I try to go to google. I tried the about:config fix and that didn't work for me. it says that the site is using hsts specify that Firefox may only connect to it securely. I'm using my private home network for internet.

I did a fresh install of windows and a fresh install of firefox and in getting SEC_ERROR_UNKNOWN_ISSUER every time I try to go to google. I tried the about:config fix and that didn't work for me. it says that the site is using hsts specify that Firefox may only connect to it securely. I'm using my private home network for internet.

Ŋuɖoɖo si wotia

There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

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

Websites don't load - troubleshoot and fix error messages

http://kb.mozillazine.org/Error_loading_websites


  • MOZILLA_PKIX_ERROR_MITM_DETECTED
  • uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN
  • configured their website improperly

How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER

Xle ŋuɖoɖo sia le goya me 👍 0

All Replies (3)

more options

Ɖɔɖɔɖo si wotia

There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

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

Websites don't load - troubleshoot and fix error messages

http://kb.mozillazine.org/Error_loading_websites


  • MOZILLA_PKIX_ERROR_MITM_DETECTED
  • uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN
  • configured their website improperly

How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER

more options

i dont have an anti virus program other then windows defender

more options

Has the problem been solved?