Firefox will no longer open Google without a "This Connection is Untrusted" error, and no option to get a temporary certificate is available.
This problem popped up for the first time a few months ago. but I was able to work around it by by clicking on "I understand the risks" on the "This Connection Is Untrusted" warning page, and then by adding a security exception. That fix would work for random lengths of time... sometimes for days, sometimes for minutes. Now, after updating to the latest version of Firefox, I get the same security warning but the option to click "I Understand the Risks" is gone. I get this error message on the technical details page: (Error code: sec_error_unknown_issuer
I have done everything listed here many, many times: https://support.mozilla.org/en-US/kb/connection-untrusted-error-message I mean everything. Delete cert.db, start in safe mode, empty cache, delete and reinstall.... Nothing works.
Your help would be greatly appreciated!
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In Firefox, you need to import into Authorities. The certificate usually will have a .cer extension.
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With regard to Google certificates in other browsers, I have Edge and Chrome but haven't found a way to view the certificates.
h_g said
With regard to Google certificates in other browsers, I have Edge and Chrome but haven't found a way to view the certificates.
Could you look at this post: https://support.mozilla.org/questions/1094777#answer-807808
Chrome shows the same certificate that I imported into Firefox from the list of "Authorities". Edge doesn't show the certificate but states that the same authority "GeoTrust Global CA" which issued the Chrome and Firefox certificates identifies the site as www.google.com. As I stated, Chrome and Edge have no problem. I'm beginning to believe it's simply a Firefox bug.
Did you check the issuer of the certificate?
You can check the date and time and time zone in the clock on your computer: (double) click the clock icon on the Windows Taskbar.
If you can't inspect the certificate via "I Understand the Risks" then try this:
Open the "Add Security Exception" window by pasting this chrome URL in the Firefox location/address bar and check the certificate:
- chrome://pippki/content/exceptionDialog.xul
In the location field of this window type or paste the URL of the website.
- retrieve the certificate via the "Get certificate" button
- click the "View..." button to inspect the certificate in the Certificate Viewer
You can inspect details like the issuer and the certificate chain in the Details tab of the Certificate Viewer. Check who is the issuer of the certificate. If necessary then you can attach a screenshot that shows the certificate viewer.