Ghostery sees the "invisible" web, detecting trackers, web bugs, pixels,
and beacons placed on web pages by Facebook, Google Analytics, and over
400 other ad networks, behavioral data providers, web publishers - all
companies interested in your activity.

After showing you who operates behind the scenes, Ghostery also gives
you the opportunity to learn more about each company it identifies,
including links to their privacy policy and opt-out options.

Ghostery allows you to block scripts from companies that you don't
trust, delete local shared objects, and even block images and iframes.

Ghostery also includes the optional, opt-in feature called GhostRank,
which sends Ghostery servers anonymous information about the trackers
you encounter and where you encounter them. This allows us to create a
more comprehensive list of detectable items, and helps us create a more
transparent behavioral advertising ecosystem through our partnership
with Evidon.

Ghostery is built and maintained for users that care about their online
privacy, and is engineered with privacy as a primary goal. Ghostery use
is anonymous. No registrations or sign-ups are required. The Ghostery
plug-in does not place cookies into your browser. Neither the Ghostery
application nor Evidon receives any data from Ghostery users unless the
user opts-in to participate in GhostRank. GhostRank data itslef is
anonymous, is NEVER used for advertising targeting purposes, and is only
shared in aggregated, non-personal, statistical form.

Install ghostery from the link below
Link:
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hmmm...........this is one of the most necessary add-on
thx for the share bro!