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

After upgrading to Firefox 9.0.1 I'm getting an error message when I open Firefox: what should I do to get rid of it?

  • 1 ŋuɖoɖo
  • 11 masɔmasɔ sia le wosi
  • 1 view
  • Nuɖoɖo mlɔetɔ the-edmeister

more options

The error message is: load: TypeError: Components.classes['@checkpoint.com/XPCOMTrustCheckerMozilla/TrustCheckerMozilla;1'] is undefined

Apart from this message appearing, Firefox seems to be working ok.

The error message is: load: TypeError: Components.classes['@checkpoint.com/XPCOMTrustCheckerMozilla/TrustCheckerMozilla;1'] is undefined Apart from this message appearing, Firefox seems to be working ok.

All Replies (1)