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.

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

What happened: typeError Components.classes['@mozilla.org/extensions/manager;1'] is undefined

more options

I upgrade my firefox. now i keep getting the same error What happened: typeError Components.classes['@mozilla.org/extensions/manager;1']

is undefined

I upgrade my firefox. now i keep getting the same error What happened: typeError Components.classes['@mozilla.org/extensions/manager;1'] is undefined

All Replies (1)

more options