Every website i go on, including Mozilla, gives me a "Connection cannot be trusted" screen with no option to permanently approve it
Every website i go to i get the same message. When you click on technical details it reads e.g.:
www.google.com uses an invalid security certificate.
The certificate is not trusted because no issuer chain was provided.
(Error code: sec_error_unknown_issuer)
I tried removing Firefox and reinstalling it. Same result
Modified by DSaperstein
All Replies (2)
hello DSaperstein, which security software are you using?
Some firewalls monitor secure (https) connections and send their own certificate instead of the website's certificate.
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.
You can see more Details like intermediate certificates that are used in the Details pane.
Some security software intercept secure connections and send their own certificate.
Some examples are ESET and Bitdefender.
- ESET setup -> advanced setup -> extend web and email tree -> SSL
- SSL protocol: Do not scan SSL protocol
- BitDefender -> Privacy settings -> disable Scan SSL
If the above didn't help the try to rename the cert8.db file in the Firefox profile folder to cert8.db.old or delete the cert8.db file to remove intermediate certificates that Firefox has stored.
If that helped to solve the problem then you can remove the renamed cert8.db.old file.
Otherwise you can rename (or copy) the cert8.db.old file to cert8.db to restore the previous intermediate certificates.
Firefox will automatically store intermediate certificates when you visit websites that send such a certificate.
If that didn't help then remove or rename secmod.db (secmod.db.old) as well.
Modified by cor-el