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.

Just updated firefox, every time I open it I get a message about a java script application

  • 4 vastust
  • 6 on selline probleem
  • 17 views
  • Viimati vastas chloe_am

chloe_am
chloe_am
more options

The message says

[Java Script Application] can't create mcaffee plug-in object. TypeError: Components.classes[cid] is undefined

The message says [Java Script Application] can't create mcaffee plug-in object. TypeError: Components.classes[cid] is undefined

All Replies (4)

DanHerlihy74
DanHerlihy74
more options

I have the same problem running in Windows 7 when I launch Firefox 4. The slightly different message I get is - [Java Script Application] TypeError: Components.classes[c] is undefined

DanHerlihy74
DanHerlihy74
more options

Correction - the message I get is - TypeError: Components.classes[c] is undefined

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

For chloe_am it indicates the version of McAfee add-on is not compatible.

Muudetud TonyE poolt

chloe_am
chloe_am Küsimuse esitaja
more options

Thanks! I just disabled the add on and the message hasn't returned.