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I have two user identities on my Dell and Firefox works great on one but on the other I get "Invalid Cecurity Certificate" on many sites.

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sheerluck
sheerluck
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I have two user identities on my Dell computer (Windows 7). I usually use Firefox and until about a week ago both identities worked fine for all websites. One still has no problems. The other identity has recently given me a message that includes the following for some websites such as Yahoo and My Ebay.

"This Connection is Untrusted."

"You have asked Firefox to connect securely to www.yahoo.com, 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."

"Invalid Security Certificate."

"(error code: sec_error_unknown_issuer)"

I have deleted Firefox and reinstalled. I have restarted. I have uninstalled everything that was installed in the last couple weeks. Nothing has helped.

I get none of this on my other identity when I use the same websites. Please advise me if you can.

I have two user identities on my Dell computer (Windows 7). I usually use Firefox and until about a week ago both identities worked fine for all websites. One still has no problems. The other identity has recently given me a message that includes the following for some websites such as Yahoo and My Ebay. "This Connection is Untrusted." "You have asked Firefox to connect securely to www.yahoo.com, 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." "Invalid Security Certificate." "(error code: sec_error_unknown_issuer)" I have deleted Firefox and reinstalled. I have restarted. I have uninstalled everything that was installed in the last couple weeks. Nothing has helped. I get none of this on my other identity when I use the same websites. Please advise me if you can.

Alla svar (4)

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

Check out why the site is untrusted and click "Technical Details to expand this section.
If the certificate is not trusted because no issuer chain was provided (sec_error_unknown_issuer) then see if you can install this intermediate certificate from another source.

You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.

  • 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 of the certificate.

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

If "I Understand the Risks" is missing then this page may be opened in an (i)frame and in that case try the right-click context menu and use "This Frame: Open Frame in New Tab".

  • Note that some firewalls monitor (secure) connections and that programs like Sendori or FiddlerRoot can intercept connections and send their own certificate instead of the website's certificate.
  • Note that it is not recommended to add a permanent exception in cases like this, so only use it to inspect the certificate.
sheerluck
sheerluck Frågans ägare
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Thank you cor-el for your help. I followed your instructions and was able to identify FiddlerRoot as the issuer of the certificate. You recommended that I not add Fiddler Root as a permanent exception. What can I do now to get the proper certificates recognized for the sites that I am having trouble with?

cor-el
cor-el
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You can check in "Windows Control Panel > Programs" for recently installed programs to see if anything from Fiddler shows up.

  • Control Panel > Programs > Programs and Features > Uninstall or change a program
  • Click the Installed column to sort by this heading
sheerluck
sheerluck Frågans ägare
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FiddlerRoot doesn't show up in the Control Panel as an installed program so there is nothing to remove. Anyone have any other suggestions?