how to hide ajax requests from firebug console

we use an image attach to body tag

masoffer_order_info = {
  transaction_id: '',
  offer_id: '',
  transaction_time: , // 1447388224436
  signature: '',
  /*transaction_discount: 100000, */
  traffic_id: Cookies.get('mp_traffic_id'),
  
  products: [
   $value)
        {
            $i++;
            //if ($key == 'totalSanPham') continue;
            $product3 = $value;
     ?>
     {
        id: '',
        sku: '',
        url: 'http://myphamchonam.com',
        price: ,
        name: '',
        category: '',
        category_id : ,
        status_code: 0,
        quantity: 
    }
      
     
      
    
  ]
};

}


var MasOffer = {
    transaction: function (x) {
        var y = JSON.stringify(MasOffer.parseTransaction(x));
        var url = 'https://static.masoffer.net/img/oid/' + x.offer_id + '/?data=' + encodeURIComponent(y);

        var oImg = document.createElement("img");
        oImg.setAttribute('src', url);
        oImg.style.width = '1px';
        oImg.style.height = '1px';
        oImg.style.position = 'fixed';
        oImg.style.top = '0';

        document.body.appendChild(oImg);
    },
    parseTransaction: function (z) {
        var products = z.products;
        products.forEach(function(product, index){
            try {
                products[index] = MasOffer.parseProduct(product);
            }
            catch(err) {
                console.log(err.message);
            }

        });
        return z;
    },
    parseProduct: function (p) {
        if (p.category_id !== undefined) {
            p.category_id_raw = p.category_id;
            p.category_id = 1;
        }
        return p;
    }
};
var interval;
interval = setInterval(function(){
    if (typeof masoffer_order_info !== "undefined") {
        clearInterval(window.interval);
        MasOffer.transaction(masoffer_order_info)
    }
}, 2000);