gistfile1.js

// ==UserScript==
// @name flash - remove kuso
// @author miya2000
// @namespace http://d.hatena.ne.jp/miya2000/
// @version 1.0.0
// @include http://*
// ==/UserScript==
(function() {
    function parseQuery(query) {
        var result = {};
        var q = query.slice(query.indexOf('?') + 1);
        var params = q.split('&');
        for (var i = 0; i < params.length; i++) {
            var param = params[i];
            var pair  = param.split('=');
            var name  = decodeURIComponent(pair.shift().replace(/\+/g, ' '));
            var value = decodeURIComponent(pair.join('').replace(/\+/g, ' '));
            if (!result[name]) {
                result[name] = value;
            }
            else {
                if (result[name] instanceof Array) result[name].push(value);
                else                               result[name] = [result[name], value];
            }
        }
        return result;
    }
    function main() {
        var kuso = document.evaluate('//embed[contains(@src, "flash_detection.swf")]', document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
        if (!kuso) return;
        kuso.parentNode.removeChild(kuso);
        var query = parseQuery(kuso.src);
        if (query.flashContentURL) {
            location.replace(query.flashContentURL);
        }
    }
    document.addEventListener('DOMContentLoaded', main, false);
})()