AJAX Monitor Browser Plugin

I want to write a browser plugin that will allow me to load a web page and will sit and monitor the page for any asynchronous updates, and then write the details of those updates to a file. Please point me to the easiest way to accomplish this or to an existing plugin if one exis开发者_开发百科ts. Thanks!

Firebug, the de facto standard developer tool for Firefox, includes all of the features you describe, and though logging requests to a file isn't built-in the Omnibug extension appears to support that, or you could build that functionality yourself.