How to call a iframe in a panel in firefox extension - iframe

Question

I am trying to create a extension in Firefox using sdk addon. What i want to do is to call an iframe inside a panel.
I have already created the extension for chrome and now i am trying to do it for firefox.
I have a facebook login in the iframe. Once i click on the sign in button the iframe just goes blank. If I log in before hand then also the extension doesnt work. It is as if it can't access the session.
Here is the code of my main.js file.
var { ToggleButton } = require('sdk/ui/button/toggle');
var panels = require("sdk/panel");
var data = require("sdk/self").data;
var {Cc, Ci} = require("chrome");
var tabs = require("sdk/tabs");
var title=tabs.activeTab.title;
var button = ToggleButton({
id: "my-button",
label: "my button",
icon: {
"16": "./logo1.png",
"32": "./logo1.png",
"64": "./logo1.png"
},
onChange: handleChange
});
var panel = panels.Panel({
width:450,
height:400,
contentURL: data.url("popup.html"),
onHide: handleHide
});
function handleChange(state) {
if (state.checked) {
panel.show({
position: button
});
}
}
function handleHide() {
button.state('window', {checked: false});
}
here is the code of my main javascript file that calls the iframe
$(document).ready(function() {
document.body.style.display = 'block';
var ur='xyz';
var frame = document.createElement('iframe');
var frame_url = 'https://developer.mozilla.org/en-US/Add-ons/SDK/High-Level_APIs/page-mod';
frame.setAttribute('width', '100%');
frame.setAttribute('height', '100%');
// frame.setAttribute('margin', '-10%');
frame.setAttribute('frameborder', 'none');
frame.setAttribute('id', 'rtmframe');
$('body').height(450).width(400);
frame.setAttribute('src', frame_url);
document.body.appendChild(frame);
$('iframe#rtmframe').load(function() {
$('#loadImg').hide();
});
});
This is not the actual link i am trying to open. Can anyone suggest what i can do differently. or point me to github code that might be doing the same thing.