I had never heard of it but it definitely looks like one I would be interested in. I know it is impossible to totally stop tracking but being able to block at least a portion of it would be worth while if it was as easy as an add on.
Thanks for bringing it to our attention.

mvps HOSTS

FF extensions. try them out in a temporary new profile, or save backup copy of your profile folder before installing:
noscript, if you can stand it.
ghostery.
refcontrol
https://addons.mozilla.org/en-US/firefox/extensions/privacy-security/

proxomitron, if you can deal with it. [/attitude] :-)

torproject. tbb