Windows 10 bereikte EO (einde ondersteuning) op 14 oktober 2025. Als je Windows 10 gebruikt, lees dan dit artikel.

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Zoeken in Support

Vermijd ondersteuningsscams. We zullen u nooit vragen een telefoonnummer te bellen, er een sms naar te sturen of persoonlijke gegevens te delen. Meld verdachte activiteit met de optie ‘Misbruik melden’.

Meer info

Deze conversatie is gearchiveerd. Stel een nieuwe vraag als u hulp nodig hebt.

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

  • 5 antwoorden
  • 518 hebben dit probleem
  • 58 weergaven
  • Laatste antwoord van ColinTindal
  • Gearchiveerd

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

Alle antwoorden (5)

Start Firefox in Use Troubleshoot Mode in Firefox 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:

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.

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.

I reinstalled ZoneAlarm, problem gone.

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

Bewerkt door ColinTindal op