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Troubleshooting Certificates in Firefox

NOTICE: CertAid now supports Firefox 90+ for certificate installation. If you are looking for manual instructions on installing certificates, see Install and Delete MIT Personal Certificate 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.

On this page:

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

Secure Connection Failed

This Connection is Untrusted

SSL Error Handshake Failure

  • Solution: Obtain an MIT Personal Certificate.
  • Detailed solution: [SSL Error Handshake Failure Alert]

Screenshot of SSL Error

Error About Expired Certificates Even After Renewal

Prompted Multiple Times to Select a Certificate

  • Solution: This can occur when Firefox is not set to automatically choose a certificate.
  • Detailed solution: [Prompted Multiple Times to Select a Certificate]

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

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Documentation and information provided by IS&T staff members

Last Modified:

July 27, 2023

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