do you get those errors for all secure sites you want to connect to - what is the error code shown under technical details?

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.
You may need to remove or rename secmod.db (secmod.db.old) as well.

It is also possible that your firewall is intercepting secure connections, so you can check that as well.

@ madperson

Yes like it says error comes up on all pages. here is a pic http://johndenugent.org/images/firefox-untrusted-connection.jpg

@ cor-el

Im sorry nothing worked after your suggestions.....also its nothing to do with my firewall.

What does it say under the Technical Details?

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.

@ cor-el

On every secure site i go to it says same error, even when i go to gmail website.

see what happens on the images below

1 http://imgbox.com/aan0CRzJ

2 http://imgbox.com/aao2nn7l

3. http://imgbox.com/aaxPt6Wj

Did you check who issues the certificates like I posted above?

@ cor-el Yes i did like it shows in the pics i posted

@ cor-el

check the images yourself and see proof

What I mean is what the Certificate Manager shows if you inspect that certificate.

• Click the link at the bottom of the error page: "I Understand the Risks"
• Retrieve the certificate: "Add Exception" -> "Get Certificate".
• Click the "View..." button and inspect the certificate and check who is the issuer via the Details (Certificate > Issuer).

@ cor-el

I did that already can you see the pic link please. http://imgbox.com/aaxPt6Wj

Sorry, I didn't look at all the images.

You can see that the certificate is issued by your security software (Firewall): ESET SSL Filter CA
So you will have to disable that filter or install the ESET root certificate that chains to that certificate.

@ cor-el

where can i find the ESET root certificate

Sorry, I don't know how to get that root certificate.

You can try ESET support:

• http://www.wilderssecurity.com/forumdisplay.php?f=15

See also:

• http://kb.eset.com/esetkb/index?page=content&id=SOLN2869

Ok found the solution, since it was a ESET root certificate missing, i decided to unistall Eset completely and delete all registry for it also. I restarted computer and downloaded latest version of Eset and installed it then i went to Firefox and all was working again with no problems

We are a company with sales almost exclusively through our site. In the past couple of weeks, we have had many reports (The certificate is not trusted because no issuer chain was provided) from our customers who use FireFox. I suspect there has been a recent update. Our site has functioned very well with FireFox until now.

We could not possibly start telling our customers how to adjust their browser settings. We have customers from coast to coast and the complaints are coming from coast to coast. Chrome, Opera, Safari and IE do not have this problem.

The server may not send required intermediate certificate(s).

You can inspect the certificate chain via a site like this:

• http://www.networking4all.com/en/support/tools/site+check/