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

When opening Firefox 6 I receive 2 JavaScript Application errors; the 1st is "TypeError: Component.classes[TvtPwmComponent_CID] is undefined". The 2nd error is; "TypeError:Components.classes[componentid] is undefined." How can I correct these errors?

  • 2 svar
  • 27 har dette problemet
  • 1 view
  • Siste svar av Dukeleto

more options

When opening Firefox 6 I receive 2 JavaScript Application errors; the 1st is "TypeError: Component.classes[TvtPwmComponent_CID] is undefined". The 2nd error is; "TypeError:Components.classes[componentid] is undefined." and upon closing Firefox 6 I receive the following JavaScript error; "ReferenceError:M_caFxTBobj is not defined."

When opening Firefox 6 I receive 2 JavaScript Application errors; the 1st is "TypeError: Component.classes['''TvtPwmComponent_CID'''] is undefined". The 2nd error is; "TypeError:Components.classes['''componentid'''] is undefined." and upon closing Firefox 6 I receive the following JavaScript error; "ReferenceError:'''M_caFxTBobj''' is not defined."

All Replies (2)

more options

This issue can be caused by an extension that isn't working properly.

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

more options

Subscribed to this by mistake, my problem is the same, but with Thunderbird 6.2 Turned out to be a conflict with Bullguard AV spamfilter & backup, disabling these fixed the error. Yours could be similar?