Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

Mozilla サポートの検索

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

このスレッドはアーカイブに保管されました。 必要であれば新たに質問してください。

IGet this message when I start firefox, TypeError: Components.classes[cid] is undefined

  • 2 件の返信
  • 64 人がこの問題に困っています
  • 24 回表示
  • 最後の返信者: winnipooh34

davekmcnic
davekmcnic
more options

upgraded firefox a couple of days ago now i get this error message, and the upgrade file starts to download again.

message ; TypeError: Components.classes[cid] is undefined

upgraded firefox a couple of days ago now i get this error message, and the upgrade file starts to download again. message ; TypeError: Components.classes[cid] is undefined

すべての返信 (2)

Xircal
Xircal
more options

This type of error is usually caused by an add-on you've installed. It could be anything from an antivirus link scanner like AVG Safe Search, or McAfee Site Advisor, or something similar.

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode. If it functions properly in that configuration, then one of your add-ons is the culprit.

See also Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

winnipooh34
winnipooh34
more options

I had the same problem . I disables ask.com in my tools and it took it away i do not receive the message any more.