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This extension changed the way I browse. I got it on my old browser, then when I moved to Firefox (and never looked back), I got it again. It's well designed, user friendly, and shady-private-dealing free. I strongly recommend it to anyone who feels the gaze on their back while they browse, but doesn't know who's looking.

easy to use, unobtrusive. seems to block most of the trackers. easy to change the settings and change what pages you want to block on.

It works!
It does the job!
It is updated and maintained!

Very easy to use

Every now and then you are reminded it is working in the background, when you need to tweak something, good.

slim fast and makes browsing faster than normal by far

While Ghostery appears to block many trackers, analytics (particularly offensive to me), and ads, I do get numerous cookies. I added Ghostery and Ad Block Plus, as well as exploring my browser history and periodically (Sometimes many times in a session) erasing it, because it is the invisible and unwanted "phishing" that sites do that we should eliminate, for many good reasons.

Ghostery was the first add-on I used to expose this spying, and remains the most effective non-erasure technique I use.

It does appear that some information-seeking characteristics used by Google, for instance, does escape Ghostery. This suggests that there are other types of tracking and identification going on.

Some malicious material does infect, coming from the internet, and I also suggest that people periodically remove the batteries and unplug their devices from ALL electrical input. This is a simple way to reboot without having to pay $60 for a cleanup.

All that said, Ghostery was the single add-on that helped me to understand the collection of information and the surreptitious installation of unwanted collection of information, that goes on. Use it!.

It effectively blocks out prying eyes!