Logging all Firefox HTTP Request Headers?

"If you have access to a Windows virtual machine or any other Windows physical machine, you can run Fiddler which should do exactly what you want.

After a brief look, I did find a program called Charles which some people refer to as ""Fiddler for Linux"", but I have no experience using it."

Try to use this Free HTTP Testing tool.

I use the HttpFox extension for this sort of thing.

You can access the firefox log to trace each http request. It is not done by default. Instructions are available at Mozilla