be a weeb 1.0

// ==UserScript==
// @name         Moonrune Decipherer
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Turns those pesky number codes into something else you can't understand.
// @author       dat boi
// @grant        none
// ==/UserScript==
/* jshint -W097 */
'use strict';

walk(document.body);

function walk(node)
{
    // I stole this function from a guy who stole this function from here:
    // http://is.gd/mwZp7E

    var child, next;

    switch (node.nodeType)
    {
        case 1:  // Element
        case 9:  // Document
        case 11: // Document fragment
            child = node.firstChild;
            while (child)
            {
                next = child.nextSibling;
                walk(child);
                child = next;
            }
            break;

        case 3: // Text node
            handleText(node);
            break;
    }
}

function handleText(textNode)
{
    var str = textNode.nodeValue;
    //I only wrote this part
    var pattern = /&#(\d+);/gim;
    var matches;
    while ((matches = pattern.exec(str)) != null) {//yes, 4 identical consecutive while loops is the only way I could get this to work
        str = str.replace(matches[0], String.fromCharCode(matches[1]));
    }
    while ((matches = pattern.exec(str)) != null) {
        str = str.replace(matches[0], String.fromCharCode(matches[1]));
    }
    while ((matches = pattern.exec(str)) != null) {
        str = str.replace(matches[0], String.fromCharCode(matches[1]));
    }
    while ((matches = pattern.exec(str)) != null) {
        str = str.replace(matches[0], String.fromCharCode(matches[1]));
    }

    textNode.nodeValue = str;
}