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

Problem with website's security certificate

  • 2 replies
  • 1 has this problem
  • 11 views
  • Last reply by cor-el

more options

When I try to access Mozilla Firefox for my browse, I get a warning that this website's security certificate has expired or is not yet valid?

When I try to access Mozilla Firefox for my browse, I get a warning that this website's security certificate has expired or is not yet valid?

All Replies (2)

more options

There is security software like Avast and Kaspersky and BitDefender and ESET that intercept secure connections and send their own certificate.

http://www.ehow.com/how_11385212_troubleshoot-reset-connection-firefox.html

https://support.mozilla.org/en-US/kb/server-not-found-connection-problem

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

http://kb.mozillazine.org/Error_loading_websites

This Connection is Untrusted is sometimes caused because the computer system clock is wrong. Check the time / date / time zone settings.

more options

You can check the date and time and time zone in the clock on your computer: (double) click the clock icon on the Windows Taskbar.