We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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.

Rohkem teavet

Teema arhiveeriti. Please ask a new question if you need help.

Error Message

  • 2 vastust
  • 10 on selline probleem
  • 4 views
  • Viimati vastas garryoman

garryoman
garryoman
more options

After installing FF4 I get the following message:

Type Error Components.classes [cid] is undefined.

Help please

After installing FF4 I get the following message: Type Error Components.classes [cid] is undefined. Help please

Valitud lahendus

This is an indication that you have an add-on that is not compatible with Firefox 4. For details of how to troubleshoot that see https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Loe vastust kontekstis 👍 1

All Replies (2)

TonyE
TonyE
  • Moderator
more options

Valitud lahendus

This is an indication that you have an add-on that is not compatible with Firefox 4. For details of how to troubleshoot that see https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

garryoman
garryoman Küsimuse esitaja
more options

Thank you for the rapid response