如何使插件在加载页面时运行函数

Question

我正在开发一个firefox插件，我希望它在每个表单字段中添加一个事件侦听器。我将如何实现这一点。

Answer 1

// 'extension is loaded', you probably have this 
window.addEventListener("load", function() { 
    // run your_function() when page is loaded and DOM is ready 
    gBrowser.addEventListener("DOMContentLoaded", your_function, true); 
}, false);