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

This thread was archived. Əgər kömək lazımdırsa lütfən yeni sual verin.

Before operning page, mozilla displays this message what happened:TypeError: Components.classes['@mozilla.org/extensions/manager;1'] is undefined

  • 1 cavab
  • 4 have this problem
  • 2 views
  • Last reply by TonyE

ramakrishnavada
ramakrishnavada
more options

Sir could pls help on this following querry ???

before opening mozilla firefox page it is displaying the following message......... what happened:TypeError: Components.classes['@mozilla.org/extensions/manager;1'] is undefined

Sir could pls help on this following querry ??? before opening mozilla firefox page it is displaying the following message......... what happened:TypeError: Components.classes['@mozilla.org/extensions/manager;1'] is undefined

All Replies (1)

TonyE
TonyE
  • Moderator
more options

That indicates that you are using an add-on that is not compatible with Firefox 4. For details of how to troubleshoot this to find out what one is causing the problem see https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes