jQuery AJAX not working on Firefox

I have a function and an AJAX call. After clicking it gets the function and function works fine, on alert it shows the data, but after that it does not send the data to PHP. Any ideas why this happens on Firefox? It works well in IE and Chrome.

function siparisolustur() {
    var toplamsiparis = $('.urunrow').length;
    var i = null;
    var siparisid = $("#siparis_id").text();

    var name = $("#siparisad").val();
    var surname = $("#siparissoyad").val();
    var tel = $("#siparistel").val();
    var adres = $("#sepetadres").val();
    var semt = $("#sepetilce").val();
    var sehir = $("#sepetsehir").val();
    var notlar = $("#siparisnotu").val();
    var odeme = $('input[name="odemeyontemi"]:checked').attr("id");

    bilgiDataString = '&siparisid=' + siparisid + '&name=' + name + '&surname=' + surname + '&tel=' + tel + '&adres=' + adres + '&semt=' + semt + '&sehir=' + sehir + '&notlar=' + notlar + '&odeme=' + odeme;

    alert(bilgiDataString);

    $.ajax({
        type: "POST",
        url: "http://ift.tt/1DpLDvA",
        data: bilgiDataString,
        cache: false,
        success: function (html) {

        }
    });

    $("#payForm").submit(function (e) {
        var siparisdurdur = 0;
        var ad = $("#siparisad").val();
        var soyad = $("#siparissoyad").val();
        var tel = $("#siparistel").val();
        var adres = $("#sepetadres").val();
        var ilce = $("#sepetilce").val();
        var sehir = $("#sepetsehir").val();
        var sepeturunadetget = parseInt($("#sepeturunsayisi").text());

        if (ad == "" || soyad == "" || tel == "" || adres == "" || ilce == "" || sehir == "" || sepeturunadetget < 1) {
            siparisdurdur = 1;
        }

        if (ad == "") {
            e.preventDefault();
            $("#siparisad").css("border-    color", "#cd2828")
        } else {
            $("#siparisad").css("border-color", "#d1d2e6");
        }
        if (soyad == "") {
            e.preventDefault();
            $("#siparissoyad").css("border-color", "#cd2828")
        } else {
            $("#siparissoyad").css("border-color", "#d1d2e6");
        }
        if (tel == "") {
            e.preventDefault();
            $("#siparistel").css("border-color", "#cd2828")
        } else {
            $("#siparistel").css("border-color", "#d1d2e6");
        }
        if (adres == "") {
            e.preventDefault();
            $("#sepetadres").css("border-color", "#cd2828")
        } else {
            $("#sepetadres").css("border-color", "#d1d2e6");
        }
        if (ilce == "") {
            e.preventDefault();
            $("#sepetilce").css("border-color", "#cd2828")
        } else {
            $("#sepetilce").css("border-color", "#d1d2e6")
        }
        if (sehir == "") {
            e.preventDefault();
            $("#sepetsehir").css("border-color", "#cd2828")
        } else {
            $("#sepetsehir").css("border-color", "#d1d2e6")
        }
        if (blocksubmit == 1) {
            e.preventDefault();
            $("#personalinfosubmit").fadeOut("fast").fadeIn("fast").fadeOut("fast").fadeIn("fast");
        }
        if (sepeturunadetget < 1) {
            e.preventDefault();
            $("#shoppingcost").css("color", "#cd2828");
            $("#shoppingcost").fadeOut("fast").fadeIn("fast").fadeOut("fast").fadeIn("fast");
        }

        if (blocksubmit == 0 && siparisdurdur == 0) {
            siparisolustur();
        }
    });