Software, Technology

How-to: View and clear SSL Certificate Exceptions on Firefox

Firefox preferences windowFirefox is pretty good on security, such that when a site presents an SSL certificte that doesn’t cross-match to the owner of a number of other properties, it throws a message:

This Connection is Untrusted: You have asked Firefox to connect securely to, but we can’t confirm that your connection is secure. Normally, when you try to connect securely, sites will present trusted identification to prove that you are going to the right place. However, this site’s identity can’t be verified.

For untrusted certificates, you may choose to accept the connection by confirming it as an exception which Firefox then stores. Which is fine until you need to clear the exception and start over. Although Firefox isn’t that intuitive about where to view those certificate exceptions and how to clear them.

Firefox Certificate ManagerCertificate exceptions are found via the Edit menu, under Preferences, Advanced. The last of the tabs in the dialog is for Certificates. Select the button View Certificates and it opens a further dialog for the Certificate Manager (didn’t know you had one?).

In a further set of tabs, you select Servers, since SSL certificates are all server-based.

Firefox confirm delete of Firefox SSL exceptionsHighlight a certificate exception to clear and hit the Delete button. You will get a confirmation box to tell you Firefox is restoring its default security checks. RC

Related: How-to: Fix Untrusted Connections in Firefox

About Robin Catling

Robin Catling gained degrees in both arts and technology which led to a diverse portfolio of employment. A freelance systems analyst, project manager and business change manager for the likes of American Express, British Airways and IBM, he moved on to web design, journalism and technical authoring. He has also worked in film and television, both behind and in front of the camera, including productions by Steven Spielberg, Martin Scorcese, Ron Howard and Ridley Scott. A qualified three-weapon coach, he runs West Devon Swords teaching sports fencing to all age groups, and in recent years qualified with the British Federation of Historical Swordplay to teach medieval and renaissance combat in the Historical Western Martial Arts.


2 thoughts on “How-to: View and clear SSL Certificate Exceptions on Firefox

  1. Hello there I am so happy I found your site, marvelous post and a all round exciting blog.

    Posted by Vecu | Aug 3, 2014, 10:36 am
  2. Hello there! Your blog provided us useful information to work on. You have done a outstanding job!

    Posted by Nyx | Aug 3, 2014, 11:30 am

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