XMLHttpRequest in Firefox Extension

Question

I am writing a FireFox-Extension and want to load Data from Server. But when I try to initialize the XMLHttpRequest with:

var request = new XMLHttpRequest();         


        

Answer 1

For using XMLHttpRequest constructor you should add the XPCOM component constructor:

const XMLHttpRequest  = Components.Constructor("@mozilla.org/xmlextras/xmlhttprequest;1", "nsIXMLHttpRequest");

and after:

// some code
var req = new XMLHttpRequest();
// some code

More info on MDN