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

This thread was archived. Please ask a new question if you need help.

The Firefox have problem with ssl certificate. Error "sec_error_unknown_issuer". Delete database cert8.db don't help. Because open Firefox problem periodically

cyberpiratenew
cyberpiratenew
more options

The Firefox have problem with ssl certificate. Error "sec_error_unknown_issuer". Delete database cert8.db don't help. Because open Firefox problem periodically appears. How correct problem? SSL certificate internal certification authority.

The Firefox have problem with ssl certificate. Error "sec_error_unknown_issuer". Delete database cert8.db don't help. Because open Firefox problem periodically appears. How correct problem? SSL certificate internal certification authority.

All Replies (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Who is the issuer of the certificate?

Firefox needs a root certificate to be able to build a complete certificate chain then ends with a trusted root certificate.

cyberpiratenew
cyberpiratenew Question owner
more options

I have internal certification authority company. Chain (Root,Intermediate,MicrosoftCA,Certificate(test.ru)). I have error with the same serial numbers in ssl certificate Intermediate and MicrosoftCA. Site with https:// In other browsers (chrome, IExplorer) opens normally.