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.

Avatar for Username

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

Mulongo oyo etiyamaki na archive. Tuna motuna mosusu soki osengeli na lisalisi

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 eyano
  • 1 eza na nkokoso oyo
  • 13 views
  • Eyano yasuka ya Hasan

jmiranda34
jmiranda34
more options

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

All Replies (1)

Hasan
Hasan
more options

Troubleshooting extensions and themes

Check and tell if its working.