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

Mulongo oyo etiyamaki na archive. Tuna motuna mosusu soki osengeli na lisalisi

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

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)

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.

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.