An evercookie is defined as:
evercookie accomplishes this by storing the cookie data in several types of storage mechanisms that are available on the local browser. Additionally, if evercookie has found the user has removed any of the types of cookies in question, it recreates them using each mechanism available.
Jeremiah Grossman points out in his article to an evercookie demo and to the attempts made by Dominic White to defeat this tracking system. Dominic comments that Firefox should be safe by default (?) but Safari not, and he created shell script that deletes the temporary files.
Apparently, Jeremiah found a way to remove this cookies in Google Chrome and only using the GUI. It is achieved by disabling the Silverlight and Flash storage settings.