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.

Firefox security closing access to all sites

  • 1 odgovor
  • 1 ima ovaj problem
  • 1 view
  • Posljednji odgovor poslao FredMcD

msg0978
msg0978
more options

After a Windows update, Firefox is declaring all sites unsecure - Google, Gmail, cbc.com and even mozilla.org. I cannot go onto any websites on Firefox. I am using Chrome (not my favourite browser) to enter this.

Screen -

Your connection is not secure

The owner of www.google.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.

This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate.

Learn more…

Report errors like this to help Mozilla identify and block malicious sites

After a Windows update, Firefox is declaring all sites unsecure - Google, Gmail, cbc.com and even mozilla.org. I cannot go onto any websites on Firefox. I am using Chrome (not my favourite browser) to enter this. Screen - Your connection is not secure The owner of www.google.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website. This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate. Learn more… Report errors like this to help Mozilla identify and block malicious sites

All Replies (1)

FredMcD
FredMcD
more options

uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN configured their website improperly

How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER