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Troubleshooting Certificates in Firefox

This page lists common Firefox problems when installing certificates along with their solutions. If your problem is not listed below, contact the MIT Computing Help Desk at 617.253.1101. If you are looking for instructions on installing certificates, see our Installing and Renewing Certificates in Firefox page.

On this page:


Certificate access not working, even after obtaining a new certificate.

Secure Connection Failed

This Connection is Untrusted

SSL Error Handshake Failure

Error About Expired Certificates Even After Renewal

Prompted Multiple Times to Select a Certificate

An unexpected error has occurred

Master Password for the Software Security Device

  • Solution: This password is used by Firefox to secure the certificates stored for the browser. It is usually set upon getting a certificate for the first time. If you do not remember the password, you can reset this password.
  • Detailed solution: Master Password for the Software Security Device
    Screenshot of Master Password prompt

Error -12227 When Accessing Certificate Secured Websites

Error -12192 When Accessing Certificate Secured Websites

IS&T Contributions

Documentation and information provided by IS&T staff members


Last Modified:

July 28, 2016

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