if (!(/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent))) {
    // Load typekit normally for all other browsers
    try { Typekit.load(); } catch (e) { }
} else {
    try {
        Typekit.load({
            active: function () {
                document.body.style.visibility = "visible";
            },
            inactive: function () {
                document.body.style.visibility = "visible";
            }
        })
    } catch (e) { }
}