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

Can't install Firebug

  • 1 reply
  • 131 have this problem
  • Last reply by TonyE

more options

I'm trying to install the firebug addon in Firefox version 3.6.13 and get an error that reads:

"Firefox could not install the file at

because: Unexpected installation error Review the error console log for more details. -203"

Error Log screen looks something like this: Error: e.location.getItemLocation( is null Source File: file:///C:/Program%20Files/Mozilla%20Firefox/components/nsExtensionManager.js Line: 3533

Code detail looks like this:

     var itemLocation = e.location.getItemLocation(;

Anyone know how to resolve this?

All Replies (1)

more options

Chosen Solution