Hacke Vison Chrome extension adding it's own tag to all my Amazon urls. Rude.

hackerVision_jsbeautified.js

document.addEventListener('DOMContentLoaded', function () {
    var ae = '68656c7064757-20';
    var an = /(.*\.)?amazon\.(com|[a-z]{2}(\.[a-z]{2})?)$/i;
    var an2 = /\/gp\/product\/(\w{10})/i;
    var an3 = /\/exec\/obidos\/tg\/detail\/\-\/(\w{10})/i;
    var an4 = /\/dp\/(\w{10})/i;
    var an5 = /\/exec\/obidos\/ASIN\/(\w{10})/i;
    if (location.hostname.match(an || an2 || an3 || an4 || an5)) {
        var items = document.evaluate("//a[contains(@href, 'amazon.')]", document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
        mainloop: for (l = null, i = 0; l = items.snapshotItem(i); i++) {
            if (l.pathname.substr(-16) == ae) {
                break mainloop
            }
            var found = false;
            var arr = l.pathname.split('/');
            for (var n = 0; n < arr.length; n++) {
                if (arr[n].substr(-3) == '-20') {
                    arr[n] = ae;
                    l.pathname = arr.join('/') + l.search;
                    continue mainloop
                }
            }
            if (!l.search) {
                l.pathname += '?tag=' + ae;
                continue mainloop
            } else {
                tmp = l.search;
                if (tmp.substr(0, 1) == '?') {
                    tmp = tmp.substr(1)
                }
                var pairs = tmp.split('&');
                for (n = 0; n < pairs.length; n++) {
                    var v = pairs[n].split('=');
                    if (v[0] == 'tag') {
                        v[1] = ae;
                        pairs[n] = v.join('=');
                        l.search = '?' + pairs.join('&');
                        continue mainloop
                    }
                }
                l.search += '&tag=' + ae
            }
        }
    }
});
var mode;

function onExtensionMessage(request) {
    if (request.enabled) {
        document.documentElement.setAttribute('hc', mode + request.scheme)
    } else {
        document.documentElement.removeAttribute('hc')
    }
}
function onEvent(evt) {
    if (evt.keyCode == 122 && evt.shiftKey) {
        chrome.extension.sendRequest({
            'toggle_global': true
        });
        evt.stopPropagation();
        evt.preventDefault();
        return false
    }
    if (evt.keyCode == 123 && evt.shiftKey) {
        chrome.extension.sendRequest({
            'toggle_site': true
        });
        evt.stopPropagation();
        evt.preventDefault();
        return false
    }
    return true
}
function init() {
    if (window == window.top) {
        mode = 'a'
    } else {
        mode = 'b'
    }
    chrome.extension.onRequest.addListener(onExtensionMessage);
    chrome.extension.sendRequest({
        'init': true
    }, onExtensionMessage);
    document.addEventListener('keydown', onEvent, false)
}
init();