Firefox plugin to show raw http request/response

Is there a firefox plugin that will show http request/reponse info like methods, uri version and other raw info?

Sorry, but I don’t know what you mean by “uri version” so I don’t know if this will help, but try “live HTTP headers”. There are others too https://addons.mozilla.org/en-US/firefox/search?q=http+headers&cat=all

you want firebug