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.

Buscar en Ayuda

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

Why is Firefox is blocking safe web sites including mozilla?

  • 2 respuestas
  • 2 tienen este problema
  • 16 visitas
  • Última respuesta de FredMcD

more options

I keep getting security warnings on several web sites, even mozilla, and I can't override it,and I can't get it to accept the security certificate. Both of my laptops are fine, it is only on my desktop PC.

I keep getting security warnings on several web sites, even mozilla, and I can't override it,and I can't get it to accept the security certificate. Both of my laptops are fine, it is only on my desktop PC.

Todas las respuestas (2)

more options

hello craigbutcher, 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), a possible solution depends on different factors:

  • what is the error code shown under technical details on the error page?

in case the error code equals sec_error_unknown_issuer, please attempt to add an exception on the bottom of the error page & inspect the certificate (see the screenshot attached for instructions):

  • which issuer information does the certificate contain?

thank you!

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

more options

Also, go to Mozilla.org and get the full install for the current version.