crossrider extension won't load on https websites

I'm using crossrider to make a cross-browser extension for my website.

Here's my Page Code (extension.js) :

appAPI.ready(function($) {


 //alert("Hello World");
 appAPI.resources.createImage(
    '<a href="test.html"><img src="http://localhost/images/fleche.png" width="128" height="128" /></a>'
 ).prependTo('body');

});

The snippet is only working with website using the http protocol. When it comes to https, the javascript code doesn't run.

Thank you for your help.