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!

Sykje yn Support

Mij stipescams. Wy sille jo nea freegje in telefoannûmer te beljen, der in sms nei ta te stjoeren of persoanlike gegevens te dielen. Meld fertochte aktiviteit mei de opsje ‘Misbrûk melde’.

Learn More

Dizze konversaasje is argivearre. Stel in nije fraach as jo help nedich hawwe.

Am trying to download a plug-in, but am unable to download ANY plugins. I keep getting this: Unexpected installation error Review the Error Console log for more details. -203 What can I do to solve this issue?

  • 2 antwurd
  • 21 hawwe dit probleem
  • 6 werjeftes
  • Lêste antwurd fan Ziggy Maes

more options

I am not able to download ANY plug-ins. All attempts result in the following:

Firefox could not install the file at 

https://addons.mozilla.org/en-US/firefox/downloads/latest/10137/addon-10137-latest.xpi?src=addondetail

because: Unexpected installation error Review the Error Console log for more details. -203

I am not able to download ANY plug-ins. All attempts result in the following: Firefox could not install the file at https://addons.mozilla.org/en-US/firefox/downloads/latest/10137/addon-10137-latest.xpi?src=addondetail because: Unexpected installation error Review the Error Console log for more details. -203

Alle antwurden (2)

more options
more options

Hi slysailr ,

Please take a look at this article Unexpected installation error -203 when installing add-ons , it should help you out with your issue.

Regards, Ziggy