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(Error code: sec_error_expired_issuer_certificate)


(Error code: sec_error_expired_issuer_certificate)

URL of affected sites


Additional System Details

Installed Plug-ins

  • -Default Plug-in
  • Office Plugin for Netscape Navigator
  • Java(TM) Platform SE binary
  • Java Plug-in 1.6.0_13 for Netscape Navigator (DLL Helper)
  • Adobe Acrobat Plug-In Version 7.00 for Netscape
  • DRM Netscape Network Object
  • Npdsplay dll
  • DRM Store Netscape Plugin


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/2010031422 Firefox/3.0.19

More Information

  • Moderator
67 solutions 450 answers

Helpful Reply


please follow the instructions in the Troubleshoot the "Secure Connection Failed" error message article. There you should be getting some information on what to do.

Thanks in advance, Tobbi, Firefox Support Volunteer

  • Top 10 Contributor
  • Moderator
10759 solutions 96838 answers

Helpful Reply

Check the date and time in the clock on your computer: (double) click the clock icon on the Windows Taskbar.

CitanTim 0 solutions 2 answers

What is going on here? There are multiple posts about this error, and all of them show hundreds if not thousands of people who 'Have this problem too' and I have yet to see an answer that works for everyone. My Computer Clock is controlled by a group policy and is set to the exact correct time. I have modified my FF4 config to allow me to add bad certificates, but this didn't work either (as suggested in yet another forum). Why don't I have the ability to add a certificate as trusted for a site like gmail?

  • Top 10 Contributor
  • Moderator
10759 solutions 96838 answers

There should be no need to add an exception for a common site like Gmail (Google).

What kind of error do you get?

Did you retrieve the certificate and check that it is a Google certificate (Thawte SGC CA)?

If the data and time is correct then try to delete (or rename as a test) the file cert8.db in the Firefox Profile Folder.

zoc1963 0 solutions 1 answers

Set Date and Time

eelmaster 0 solutions 14 answers

Either your clock is wrong, your CA cert store is out-of-date or (scarily) someone's messing with your connection. Check them, in that order. I don't know if it's related to the DigiCert break-in, but it sure is scary.