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.

Avatar for Username

ابحث في الدعم

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

This thread was archived. Please ask a new question if you need help.

Firefox 8 not displaying addons, error code:sec_error_unknown_issuer

  • 3 ردود
  • 8 have this problem
  • 1 view
  • آخر ردّ كتبه cor-el

bmagan
bmagan
more options

I receive the following error message when opening the addons tool bar...

support.mozilla.com uses an invalid security certificate.

The certificate is not trusted because the issuer certificate is unknown.

(Error code: sec_error_unknown_issuer)

I receive the following error message when opening the addons tool bar... support.mozilla.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. (Error code: sec_error_unknown_issuer)

All Replies (3)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

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

bmagan
bmagan صاحب السؤال
more options

Thanks for the reply, but I checked and my date and time system settings are correct. Is there another reason why this would be happening. I have uninstalled/reinstalled firefox a number of times with no success.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Did you check the details of that certificate like the issuer and when it is valid by retrieving the certificate?

  • Click the link at the bottom of the error page: "I Understand the Risks"

Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".

  • Click the "View..." button and inspect the certificate and check who is the issuer.

You can see more Details like intermediate certificates that are used in the Details pane.