This is an interesting add-on for Firefox, it’s called lightbeam. Not meant to scare you, just keep you informed. Have a read of the article on infopackets for a heads up. http://www.infopackets.com/news/internet/2013/20131030_track_web_trackers_using_firefox_add_on_lightbeam.htm
The Mozilla blog is here. https://blog.mozilla.org/blog/2013/10/25/lightbeam-for-firefox-privacy-education-for-users-open-data-for-publishers/
Get lightbeam from here https://addons.mozilla.org/en-us/firefox/addon/lightbeam/
The graphs and info is interesting.