Arabic font fixer (TamperMonkey)

arabic_font_fixer.js

// ==UserScript==
// @name        Arabic font size fixer
// @namespace   Arminius99
// @include     *.wikipedia.org*
// @include     *.wiktionary.org*
// @include     *.aljazeera.net*
// @include     *reddit.com*
// @include     *.wordpress.com*
// @include     *.blogspot.co*
// @include     *.facebook.com*
// @include     *.twitter.com*
// @include     *.google.co*
// @include     *.youtube.co*
// @include     *mail.google.co*
// @include     *muslim.or.id*
// @include     *bisa.id*
// @include     *kelaskita.com*
// @description Increases the font size of Arabic text
// @grant       GM_addStyle
// ==/UserScript==

// adjust font, font size and font color according to your preferences
GM_addStyle("span[lang~='ar'] {font-family: 'Droid Arabic Naskh'; direction: rtl; font-size: 110% !important; }");
//GM_addStyle("span[lang~='ar'] {font-family: 'Sakkal Majalla'; direction: rtl; font-size: 130% !important; }");
// Traditional Arabic
// Simplified Arabic
// Lateef
//GM_addStyle("span[lang~='ar'] {font-family: 'Lateef'; direction: rtl; font-size: x-large !important; }");

// code by James Padolsey; http://james.padolsey.com/javascript/find-and-replace-text-with-javascript/
function findAndReplace(searchText, replacement, searchNode) {
    if (!searchText || typeof replacement === 'undefined') {
        // Throw error here if you want...
        return;
    }
    var regex = typeof searchText === 'string' ?
                new RegExp(searchText, 'g') : searchText,
        childNodes = (searchNode || document.body).childNodes,
        cnLength = childNodes.length,
        excludes = 'html';
    while (cnLength--) {
        var currentNode = childNodes[cnLength];
        if (currentNode.nodeType === 1 &&
            (excludes + ',').indexOf(currentNode.nodeName.toLowerCase() + ',') === -1) {
            arguments.callee(searchText, replacement, currentNode);
        }
        if (currentNode.nodeType !== 3 || !regex.test(currentNode.data) ) {
            continue;
        }
        var parent = currentNode.parentNode,
            frag = (function(){
                var html = currentNode.data.replace(regex, replacement),
                    wrap = document.createElement('div'),
                    frag = document.createDocumentFragment();
                wrap.innerHTML = html;
                while (wrap.firstChild) {
                    frag.appendChild(wrap.firstChild);
                }
                return frag;
            })();
        parent.insertBefore(frag, currentNode);
        parent.removeChild(currentNode);
    }
}

findAndReplace('([\u0600-\u06FF]+( [\u0600-\u06FF]+)*)', '<span lang="ar">$1</span>');

I am sorry but this is horrible, it did not work, it worsens aljazeera.net, and google translator the same, it seems that the the goal was not to make it bigger, but lower making it even more difficult to read.