// ==UserScript==
// @name          URL As Link Title
// @description   Set the URL as the link title
// @namespace     http://www.gozer.org/mozilla/greasemonkey/
// @include       *
// ==/UserScript==

(function() {
  var a = document.getElementsByTagName('a');

  for(var i = 0; i < a.length; i++)
    if(a[i].hasAttribute('href'))
      a[i].setAttribute('title', a[i].href);
})();