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

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

  • 5 replies
  • 518 have this problem
  • 1 view
  • Last reply by ColinTindal

more options

I get the following error every time Firefox starts

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

I get the following error every time Firefox starts load: TypeError: Components.classes['@checkpoint.com/XPCOMTrustCheckerMozilla/TrustCheckerMozilla;1'] is undefined

All Replies (5)

more options

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Appearance/Themes).

  • Don't make any changes on the Safe mode start window.

See:

more options

I disabled the "ZoneAlram Toolbar" in Aurora 6.0a2 (FF 6) and that error pop-up ceased.

Other people have had to disable different Add-ons to to fix the problem (Google for suggestions). It is unfortunate that the pop-up does not indicate which Add-on is causing it to pop-up.

more options

I was having problems with Avast's WebRep plugin not being compatible with FF 6.0. I downloaded the Compatibility Reporter and this error occurred.

more options

I reinstalled ZoneAlarm, problem gone.

more options

Thank you bernie_PPL, reinstalling ZoneAlarm did it for me. Colin

Modified by ColinTindal