Change declaration of sh_image_set_img_data(). - x, y, w, h are not passed to sh_image_set_img_data() any more. - Applications should manage life-cycle of mb_img_data_t, paint_image_t do not manage it for applications any more.

function start_madbuilder() {
    var url = "chrome://MadBuilder/content/madbuilder.html";
    var browser = document.getElementById("content");

    browser.loadURI(url, null, null, true);
}