Firefox has an extension called Lightbeam which does this. The author of the WebXRay software, tilbert, has already noted in a comment below that his software c

Firefox has an extension called Lightbeam which does this. The author of the WebXRay software, tilbert, has already noted in a comment below that his software can be run in batch mode on multiple sites which is an advantage over the extension. Also, see the TED talk 'Tracking our online trackers' by Gary Kovacs - http://www.ted.com/talks/gary_kovacs_tracking_the_trackers?language=en http://www.ted.com/talks/gary_kovacs_tracking_the_trackers?l....