rem: button.accesskey = strings.getString(aButtonKey + "Accesskey"); 
add: button.setAttribute("accesskey", strings.getString(aButtonKey + "Accesskey")); 
context:   _setUpButton: function (aButtonID, aButtonKey, aDisabled)  {    var strings = document.getElementById("updateStrings");    var button = document.documentElement.getButton(aButtonID);    if (aButtonKey) {      button.label = strings.getString(aButtonKey);      try {        button.accesskey = strings.getString(aButtonKey + "Accesskey");      }      catch (e) {      }    }    button.disabled = aDisabled;  },
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/73ee0b83bf39b5a153035ac2d83c5a1ad726a090/update.js/buggy/toolkit/mozapps/extensions/content/update.js