Firefox userChrome.js greasemonkeyスクリプトｽﾚ15

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// ==UserScript==
// @name RestoreGMStatusbar.uc.js
// @description Greasemonkeyのステータスバーアイコンを復活させる(for Fx4)
// @include main
// ==/UserScript==
(function(){
  var observer = {
    observe: function(subject, topic, data){
      if(topic == "xul-overlay-merged") this.initGMStatusbar();
    },
    initGMStatusbar: function(){
      var code = this.readFile("chrome://greasemonkey/content/statusbar.js");
      if(!code) return;
      code = code.replace("window.addEventListener('load', function() {", "").replace("}, false);", "");
      eval(code);
    },
    readFile: function(url){ try{
        var ios = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
        var channel = ios.newChannelFromURI(ios.newURI(url, null, null));
        var stream = channel.open();
        var sstream = Cc["@mozilla.org/scriptableinputstream;1"].getService(Ci.nsIScriptableInputStream);
        sstream.init(stream);
        var content = sstream.read(sstream.available());
        sstream.close();
        return content;
      }catch(e){ return null; }
    }
  };
  window.userChrome_js.loadOverlay("chrome://greasemonkey/content/statusbar.xul", observer);
})();