Greasemonkey script compiler is showing an error

Question

I have script like this

// ==UserScript==
// @name          messi
// @namespace     http://messi.com
// @description   example script to alert \"barcelona\"         


        

Answer 1

The user script compiler wasn't updated in quite some time and the output add-ons it produces stopped working in recent Firefox versions IIRC.

If you want to create Firefox add-ons from userscripts, you should consider using the Add-on SDK and making your user-script a page mod. That is what the addons.mozilla.org editor team is recommending, anyway.

There are other alternatives, such as Scriptify.