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I have windows 7 and firefox 63.0.1 and cannot get on google.com because of a security issue. I reinstall firefox and it works for a short while but not long

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I have windows 7 and firefox 63.0.1 and cannot get on google.com because of a security issue. The error is as follows:

www.google.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER

I uninstall firefox and resinstall and it works fine for a short period of time. Then without warning, google no longer works and I get the security issue. I have uninstalled and reinstalled 4 times now and it is still doing the same thing. Works for a while and then not.

I also tried using version 62 of firefox but that also exhibited the same issue.

I researched this issues and there are all sorts of attempted fixes that supposedly get rid of this issue which I have attempted to no avail.

Will someone please help me understand how to fix this issue. I use google and gmail all the time and this is becoming a real issue. Your help is much appreciated.

I have windows 7 and firefox 63.0.1 and cannot get on google.com because of a security issue. The error is as follows: www.google.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER I uninstall firefox and resinstall and it works fine for a short period of time. Then without warning, google no longer works and I get the security issue. I have uninstalled and reinstalled 4 times now and it is still doing the same thing. Works for a while and then not. I also tried using version 62 of firefox but that also exhibited the same issue. I researched this issues and there are all sorts of attempted fixes that supposedly get rid of this issue which I have attempted to no avail. Will someone please help me understand how to fix this issue. I use google and gmail all the time and this is becoming a real issue. Your help is much appreciated.

Additional System Details

Installed Plug-ins

  • Shockwave Flash 31.0 r0

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0

More Information

FredMcD
  • Top 10 Contributor
4245 solutions 59390 answers
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 [https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors?redirectlocale=en-US&redirectslug=Error+loading+web+sites Websites don't load - troubleshoot and fix error messages] http://kb.mozillazine.org/Error_loading_websites *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