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!

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.

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

This thread was archived. Please ask a new question if you need help.

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 பதிலளிப்புகள்
  • 21 இந்த பிரச்னைகள் உள்ளது
  • 6 views
  • Last reply by Ziggy Maes

slysailr
slysailr
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

All Replies (2)

TonyE
TonyE
  • Moderator
more options

See Unexpected installation error -203 when installing add-ons.

Ziggy Maes
Ziggy Maes
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