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!

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

I get error message whenever I try and download add-on's,WHY?

  • 1 cavab
  • 2 have this problem
  • 2 views
  • Last reply by TonyE

more options

Firefox could not install the file at

https://addons.mozilla.org/en-US/firefox/downloads/latest/256/addon-256-latest.xpi

because: Unexpected installation error Review the Error Console log for more details. -203 I get this message for any add-on. Using CA security Suite free from Timewarner,rr.com. Brfore I downloaded this software, Firefox worked just fine.

Firefox could not install the file at https://addons.mozilla.org/en-US/firefox/downloads/latest/256/addon-256-latest.xpi because: Unexpected installation error Review the Error Console log for more details. -203 I get this message for any add-on. Using CA security Suite free from Timewarner,rr.com. Brfore I downloaded this software, Firefox worked just fine.

All Replies (1)

more options