Enabling Cross-Domain AJAX in Firefox
http://blog.dirolf.com/2007/06/enabling-cross-domain-ajax-in-firefox.html

Dirolf, Mike
Mike Dirolf's Blog
2007

Abstract:

Unfortunately, Firefox doesn't allow cross-domain XMLHttpRequests for security reasons. While good security is a plus, this restriction can make development and testing a real chore. For those of us willing to risk the security vulnerability, here is how to bypass the cross-domain restriction once and for all.