Monkey Grease

I'm trying to play around with it to get tiny little annoyances out of the way, but to no avail.

 My code

Code:

// ==UserScript==
// @name           Test1
// @namespace      WhatIsThis
// @description    IDontEven
// @include        *
// ==/UserScript==

textNodes = document.evaluate(
  "//text()",
  document,
  null,
  XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
  null);
var searchRE = new RegExp('</title>','gi');
var replace = '</title>';
for (var i=0;i<textNodes.snapshotLength;i++) {
  var node = textNodes.snapshotItem(i);
  node.data = node.data.replace(searchRE, replace);
  }

Goal: Get rid of 'Southperry.net' from the text in the tab.

...but it only seems to change raw text as it appears in a fully rendered page, instead of changing the text from the HTML source.

Google is failing me, perhaps Southperry can assist?