// ==UserScript==
// @name           Amazon URL Cleaner
// @namespace      graphen
// @description    Replace article URL for Amazon
// @include        /^https?://www\.amazon\.(cn|in|co\.jp|sg|fr|de|it|nl|es|co\.uk|ca|com(.\(mx|au|br))?/.*/(dp|gp/product|exec/obidos/ASIN|o/ASIN)/.*$/
// @noframes
// @grant          none
// @version        1
// @downloadURL none
// ==/UserScript==
(function(doc) {
    // ASIN.0 in kindle store
    var asin = doc.getElementById("ASIN") || doc.getElementsByName("ASIN.0")[0];
    if (asin) {
        asin = asin.value;
        history.replaceState(null, "Amazon URL Cleaner", "/dp/" + asin + "/");
    }
})(document);