There is an interesting plugin for Chrome and Firefox currently in ‘Alpha’ release from the EFF (Electronic Frontier Foundation) who brought us ‘HTTPS Everywhere‘ named ‘Privacy Badger’.

Privacy Badger is described as a browser add-on that stops advertisers and other third-party trackers from secretly tracking where you go and what pages you look at on the web.  If an advertiser seems to be tracking you across multiple websites without your permission, Privacy Badger automatically blocks that advertiser from loading any more content in your browser.  To the advertiser, it's like you suddenly disappeared.

More details upon the EFF website.