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!

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.

詳しく学ぶ

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。

In am unable to install pluggins, updates or a toolbar I get an error message each time.

  • 1 件の返信
  • 1 人がこの問題に困っています
  • 3 回表示
  • 最後の返信者: TonyE

thomasm74
thomasm74
more options

I get this error message: "Firefox could not install the file at http://releases.mozilla.org/pub/mozilla.org/addons/1122/tab_mix_plus-0.3.8.4-fx.xpi

because: Unexpected installation error..."

I get this error message: "Firefox could not install the file at http://releases.mozilla.org/pub/mozilla.org/addons/1122/tab_mix_plus-0.3.8.4-fx.xpi because: Unexpected installation error..."

すべての返信 (1)

TonyE
TonyE
  • Moderator
more options

For details on fixing that error see https://support.mozilla.com/kb/Unexpected+installation+error+-203+when+installing+add-ons