$.get() - how to send request with URI referrer?

$.get() - how to send request with URI referrer?

For the Ajax get() function, some websites return different HTML depending on the referrer. For example, WSJ won't show the full text articles unless the URI referrer is Google. Is there something I can put in the data portion when using the get() function in order to replicate the below JS code for Firefox? If impossible, then: Is there a way, outside of jQuery, to get HTML source without loading webpage but with sending a referrer?

Thank you.
const REF_URI = Components.Constructor("@mozilla.org/network/standard-url;1", "nsIURI");
var REF = new REF_URI;
REF.spec = 'http://www.google.com';
gBrowser.addTab('http://www.wsj.com', REF, null, null, null, null);