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

Etsi tuesta

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.

Lue lisää

every time I open firefox the following message appears: what happened:TypeError: Components.classes['@mozilla.org/extensions/manager;1'] is undefined" . After I press "OK" it continues, apparently normally.

  • 1 vastaus
  • 1 henkilöllä on sama ongelma
  • 204 näyttöä
  • Viimeisin kirjoittaja Hasan
  • Arkistoitu

Everytime I open Firefox the following message appears:


what happened:TypeError: Components.classes['@mozilla.org/extensions/manager;1'] is undefine

Everytime I open Firefox the following message appears: what happened:TypeError: Components.classes['@mozilla.org/extensions/manager;1'] is undefine

Kaikki vastaukset (1)

Troubleshooting extensions and themes

Check and tell if its working.