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

message for an invalid security certificate keeps popping up when I open firefox

  • 1 phendula
  • 40 inale ngxaki
  • 1 view
  • Impendulo yokugqibela ngu cor-el

more options

"fvd.kallout.com: 443 uses an invalid security certificate the certificate expired on 5/31/11

this could be a problem with the servers configuration or it could be someone trying to impersonate the server if you have connected to the server successfully in the past the error may be temporary and you can try again later"

This is what opens on my screen every time I have opened Firefox today. If I hit "cancel" the window closes, but I do not know what it means or how to permanently clear it, or if someone is trying to use my system illegally.

Can you please tell me what my best next course of action is?

Thank you,

cemerrick

"fvd.kallout.com: 443 uses an invalid security certificate the certificate expired on 5/31/11 this could be a problem with the servers configuration or it could be someone trying to impersonate the server if you have connected to the server successfully in the past the error may be temporary and you can try again later" This is what opens on my screen every time I have opened Firefox today. If I hit "cancel" the window closes, but I do not know what it means or how to permanently clear it, or if someone is trying to use my system illegally. Can you please tell me what my best next course of action is? Thank you, cemerrick

All Replies (1)

more options

The "Fast Video Download" extension has been reported to cause this issue.