How to detect connections made by the browser from a Firefox add-on?

I'm trying to develop an extension that detec开发者_如何学编程ts every connection made by the browser to figure out the URLs being accessed. I know that this is possible via writing an HTTP/SOCKS proxy and configuring the browser to flow traffic via that. However, that's kind of overkill for the application that I'm trying to develop and it's best done as a Firefox Add-on if that's possible. Any clues/pointers would be highly appreciated.

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Use nsIHttpActivityDistributor and there is many information about the http transaction and socket transport through observeActivity callback.

Read the official documentation https://developer.mozilla.org/en/Monitoring_HTTP_activity.