This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

How do I delete a web site certificate?

  • 4 replies
  • 1 has this problem
  • 45 views
  • Last reply by mlamro

more options

I got the "get me outta here" message, and said that I trusted the site, only to realize afterwards that I mistyped the URL. I want to delete the website's certificate, but I can't figure out how.

There is already a help section on certificate manager certificate manager , but it's not written for the current version of Mozilla, so I can't figure out how to get to the certificate manager.

Any guidance would be much appreciated.

I got the "get me outta here" message, and said that I trusted the site, only to realize afterwards that I mistyped the URL. I want to delete the website's certificate, but I can't figure out how. There is already a help section on certificate manager [http://www.mozilla.org/projects/security/pki/psm/help_20/certs_help.html#Web_Site_Certificates certificate manager] , but it's not written for the current version of Mozilla, so I can't figure out how to get to the certificate manager. Any guidance would be much appreciated.

Chosen solution

Go to the site, click the Site Identity Button at the left end of the URL bar, on the Security tab in the now open Page Info window, click View Certificate. On the General and Details tab should be enough information for you to locate the certificate used by the site.


If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.



You can remove the old Java Console extensions that you have installed. You have old versions 6.0.21, 6.0.22, 6.0.23, 6.0.24
Remove them following these instructions: http://kb.mozillazine.org/Java#Multiple_Java_Console_extensions

Read this answer in context 👍 0

All Replies (4)

more options

Can you not do that from Options > Advanced > Encryption? Click the View Certificates button. In that window you should be able to read the certificates and remove any that you want removed.

more options

Hmmmm...I saw that, but I can't tell which certificate belongs to the website that I "trusted". Is there a way to figure that out? I guess this is a more complicated question than I originally thought it would be.

Thanks for your quick response!

more options

Chosen Solution

Go to the site, click the Site Identity Button at the left end of the URL bar, on the Security tab in the now open Page Info window, click View Certificate. On the General and Details tab should be enough information for you to locate the certificate used by the site.


If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.



You can remove the old Java Console extensions that you have installed. You have old versions 6.0.21, 6.0.22, 6.0.23, 6.0.24
Remove them following these instructions: http://kb.mozillazine.org/Java#Multiple_Java_Console_extensions

Modified by SafeBrowser

more options

Ah hah! That worked. I just had to click the "severs" tab, rather than the "authorities" tab, and that was where it was located. Thank you so much!