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.

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

support.mozilla.org uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown.

  • 1 odgovor
  • 1 ima ovaj problem
  • 5 views
  • Posljednji odgovor poslao user1232022

more options

Hi, most of websites - google, Facebook, YouTube, ... keeps on saying that the connection is untrusted. I had an issue before, so I deleted some certificates and it seems that I cleaned too much. 1. I tried uninstalling and installing Mozilla again and nothing. 2. I renamed the file cert8.db to cert8.db.old in the Firefox Profile Folder to reset all root certificates. But it did not help. 1. My date and time is correct. 2. Save mode did not help. Anyone can help me please? Thank you

Hi, most of websites - google, Facebook, YouTube, ... keeps on saying that the connection is untrusted. I had an issue before, so I deleted some certificates and it seems that I cleaned too much. 1. I tried uninstalling and installing Mozilla again and nothing. 2. I renamed the file cert8.db to cert8.db.old in the Firefox Profile Folder to reset all root certificates. But it did not help. 1. My date and time is correct. 2. Save mode did not help. Anyone can help me please? Thank you

Izabrano rješenje

sorry, this was a beginner mistake, I did not restart Mozilla... Now the renaming of the file cert8.db to cert8.db.old in the Firefox Profile Folder indeed worked. thank you

Pročitajte ovaj odgovor sa objašnjenjem 👍 0

All Replies (1)

more options

Odabrano rješenje

sorry, this was a beginner mistake, I did not restart Mozilla... Now the renaming of the file cert8.db to cert8.db.old in the Firefox Profile Folder indeed worked. thank you