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

Search Support

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

Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

connection is untrusted. I have tried to delete cert8.db no help

Pointer1
Pointer1
more options

ver 33.1.1 Connection is untrusted. tried to fix by deleting cert8.db. Firefox works normally on my other computers, as it has on this computer until recently.

ver 33.1.1 Connection is untrusted. tried to fix by deleting cert8.db. Firefox works normally on my other computers, as it has on this computer until recently.

All Replies (2)

philipp
philipp
  • Moderator
more options

hello Pointer1, which security software are you using on this particular pc?

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

Have you updated your security software recently? Kaspersky, AVAST 2015, ESET, Microsoft Family Security, and BitDefender include a feature which scans your web traffic for threats. For HTTP this is seamless, but for HTTPS, the software needs to present a fake certificate to Firefox.

Unfortunately, the same symptoms can be caused by malware. To help sort it out, you can inspect the issuer information for the certificate.

If you added an exception for a site: While viewing the site, go ahead and click the padlock icon (or gray ! triangle, if there is mixed content) in the address bar, then More Information, then View Certificate. What do you see under "Issued by"?

If you have not added an exception but the error page shows an "I understand the risks" section: You can expand that section and use the Add Exception dialog to view the certificate. What do you see under "Issued by"? You don't actually need to go through with adding an exception; you can cancel after getting the information.