hello,
try LiveHTTPHeaders
mozdev.org - livehttpheaders: index, from their website:
Quote:
Second by adding a tool in the 'Tools->Web Development' menu to be able to display http headers in real time (while pages are being downloaded from the Internet.
there is also NoScript
https://addons.mozilla.org/en-US/firefox/addon/722 which blocks most ads (flash or other plugins if configured correctly) and stops all scripts from executing inside a page, that makes my browsing wayyyy faster!
hope this helps!