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

Ova tema je arhivirana. Pitajte drugo pitanje ako vam je potrebna pomoć.

getting follow error when starting firefoxwww.mozilla.org uses an invalid security certificate. How do I fix it???

  • 2 odgovori
  • 4 ima ovaj problem
  • 1 view
  • Posljednji odgovor poslao Dlehr

Dlehr
Dlehr
more options

When I start firefox I get the following message,

Secure connection failed

www.mozilla.org uses an invalid security certificate. The certificate is not trusted because no issuer chain was provided. (Error code: sec_error_unknown_issuer) 

   This could be a problem with the server's configuration, or it could be someone trying to impersonate the server.
   If you have connected to this server successfully in the past, the error may be temporary, and you can try again later.

Or you can add an exception…

This is also a problem with Thunderbird also. How do I fix this??

When I start firefox I get the following message, Secure connection failed www.mozilla.org uses an invalid security certificate. The certificate is not trusted because no issuer chain was provided. (Error code: sec_error_unknown_issuer) This could be a problem with the server's configuration, or it could be someone trying to impersonate the server. If you have connected to this server successfully in the past, the error may be temporary, and you can try again later. Or you can add an exception… This is also a problem with Thunderbird also. How do I fix this??

Izmjenjeno od strane Dlehr

Izabrano rješenje

hello Dlehr, first please make sure that the date & time is set correctly on your system.
if this doesn't solve the issue (or it is already set properly), could you inspect the certificate on the site where you get the error page and tell us which issuer information it does contain (see screenshot)?

"This Connection is Untrusted" error message appears - What to do

Pročitajte ovaj odgovor sa objašnjenjem 👍 0

All Replies (2)

philipp
philipp
  • Moderator
more options

Odabrano rješenje

hello Dlehr, first please make sure that the date & time is set correctly on your system.
if this doesn't solve the issue (or it is already set properly), could you inspect the certificate on the site where you get the error page and tell us which issuer information it does contain (see screenshot)?

"This Connection is Untrusted" error message appears - What to do

Dlehr
Dlehr Vlasnik pitanja
more options

Looks like its OK now