This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Secure Connection Failed error at google.co.uk

  • 1 reply
  • 1 has this problem
  • 4 views
  • Last reply by FredMcD

pwlivingstone2706
pwlivingstone2706
more options

I restarted Firefox to update it and now get this error when I try to access google.co.uk

Secure Connection Failed

An error occurred during a connection to www.google.co.uk. You are attempting to import a cert with the same issuer/serial as an existing cert, but that is not the same cert.

Error code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL 

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the web site owners to inform them of this problem.
I restarted Firefox to update it and now get this error when I try to access '''google.co.uk''' Secure Connection Failed An error occurred during a connection to www.google.co.uk. You are attempting to import a cert with the same issuer/serial as an existing cert, but that is not the same cert. Error code: '''SEC_ERROR_REUSED_ISSUER_AND_SERIAL''' The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the web site owners to inform them of this problem.

All Replies (1)

FredMcD
FredMcD
more options

SEC_ERROR_REUSED_ISSUER_AND_SERIAL https://www.bing.com/search?q=sec_error_reused_issuer_and_serial


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

What do the security warning codes mean