It was pointed out to me that my CSP bookmarklet was using a feature added in ECMAScript 5, Object.keys, and thus did not work in older browsers. I added a bit of code to address this:

Object.keys = Object.keys || function(obj) {
  var keys = [];
  for (var key in obj) {
    if (obj.hasOwnProperty(key))
      keys.push(key);
  }
  return keys;
}

Browsers that don’t natively support Object.keys will now have that functionality added when the bookmarklet runs. Go ahead, give it a try: Recommend CSP

As before, the full source is posted for you to browse as well.