The Prospector team has a proof-of-concept experiment about:trackers
to explore the idea of users setting terms of use for shared Firefox
data. Mozilla can provide sensible defaults for users as well as help
them make sure web sites comply with the user’s terms with tools like
cookie blocking or connection blocking.
https://blog.mozilla.org/labs/2012/10/about-trackers-protecting-shared-firefox-data/
Try out the add-on for a few days and check about:trackers to see if
the list of trackers is what you would expect and if the default
blocking settings are usable.
Ed