我需要在执行任何代码之前在firefox 3.6扩展中获取window对象的句柄

Question

从ff 3.6插件开始，我想在页面上的任何JS运行之前每次创建一个新的窗口对象时都得到通知-我尝试了“ load”事件，但似乎为时已晚，时间我得到对象的句柄，并且需要在运行任何JS之前进入，请问有人有什么想法吗？

Answer 1

You need to listen for the content-document-global-created notification, that's exactly what you are asking for - a window has been set up but no JavaScript code had a chance to execute yet. This is supported starting with Firefox 3.6.6.

You need to use nsIObserverService and register your observer for this topic. When your observer is called the subject will be the newly created window.