Important Notice: We're experiencing email notification issues. If you've posted a question in the community forums recently, please check your profile manually for responses while we're working to fix this.

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.

Learn More

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

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

  • 1 èsì
  • 1 ní ìṣòro yìí
  • 6 views
  • Èsì tí ó kẹ́hìn lọ́wọ́ 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..."

All Replies (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