Collusion for chrome

Visualize and, optionally, block the invisible websites that track you.
This is relativly new to Chrome and even more powerful than the older Firefox version
IMO a must have extension

Disconnect has tweaked the code to pick up sites that may not be found by Mozilla's purely cookie-based searches. "there are many signals besides [cookies] that can identify users for tracking purposes: IP addresses, LSOs (Flash cookies), and browser fingerprinting," says Disconnect's Brian Kennish. "Collusion for Chrome catches all these cases."