Binnen-I-Remover User Script (Greasemonkey)

de.chrisnew.i-replacer.js

// ==UserScript==
// @name        Binnen-I-Replacer
// @namespace   de.chrisnew.i-replacer
// @version     5
// @match       *://*/*
// ==/UserScript==

var preserveElements = ['style', 'script', 'pre', 'code'];
var matcher = /((?![a-zA-z]+)([*_]in|In)(nen)?|\/[Ii]n(nen)?)/g;

function replace_r(elem) {
    if ((elem instanceof Element) && preserveElements.indexOf(elem.tagName.toLowerCase()) !== -1) {
        return;
    }

    if (elem instanceof CharacterData) {
        if (typeof(elem.nodeValue) === 'string') {
            elem.nodeValue = elem.nodeValue.replace(matcher, '');
        }
    }

    var childNodes = elem.childNodes;

    if (childNodes) {
        for (var i = 0, j = childNodes.length; i < j; i++) {
            replace_r(childNodes.item(i));
        }
    }
}

replace_r(document);