Is there an equivalent to Internet Explorer\'s XDomainRequest in Firefox or any of the other browsers?
I\'d like to access a service/website outside of my domain.
It's possible, you just have to set Cross-Domain headers at the target server.
.htaccess example:
Header set Access-Control-Allow-Origin "*"
Header set Access-Control-Allow-Headers "X-Requested-With"
Header set Access-Control-Max-Age "60"
XmlHttpRequest will submit an OPTIONS request to the target server which will respond with those headers, allowing the client to submit the intended request.
Source: http://www.oriontransfer.co.nz/blog/2011-05/cross-domain-ajax/index