Just wanted to leave this review here. It's working as intended in Firefox 54. Great job, EFF!

Privacy Badger helped me detect some privacy-and security thieves.
Privacy Badger is a great add-on for privacy-and-security-conscious people to browse the dangerous internet. Privacy Badger does what it says, protects its users.
I wrote the following message to Mozilla:
Firefox is wonderful. Firefox is great, but it would be 'greater' if Firefox has an inbuilt VPN, like the Opera Web Browser. I think Firefox should protect these addons to maintain the healthiness of the browser and improve its rankings among other web browsers:
NoScript Security Suite, Disconnect, BetterPrivacy-signed, Privacy Badger, HTTPS Everywhere, Blur, Click&Clean, uBlock Origin, Bluhell Firewall, Self-Destructing Cookies and Random Agent Spoofer
Thank you so much for maintaining the world's most secure web browser.

Has a simple, intuitive interface, and a built-in feedback form.

Simple

Badger automatically blocks (eats) suspicious cookies and sometimes even blocks all HTTP-queries for very suspicious domain names. So mostly you can relax and forget about all the anti-tracking job. I liked the graph which shows what trackers are treated in which way. On the other hand, Badger had kept breaking some sites (for example online-banking) before I white-listed them. Badger learns as it works so, perhaps it will detect enemies better if I use it longer.

The addon works without any problems, causes no site loading issues and is more trustworthy than other, similar programs.

Privacy badger gives me peace of mind! They clearly show what cookies or trackers are blocked and why, and they come from EFF with a great record for privacy protection!

I'm having a lot of trouble with adware and spyware and torjan viruses but destroying the potential of marriage is better than nothing

Differently than other applications that might break a page, this one actually analyzes traffic and behaviour of trackers to determinate which ones are tracking you and which ones are not, progressively blocking privacy risks without hurting your web experience. A must have!

This addon is great at blocking tracking/spying objects on web pages, but, unfortunately, when it's enabled, I get little chunks of lag when typing text into a comment field or when scrolling a web page; even when scrolling the Firefox addons page (about:addons).
I think, perhaps, they tested it using new, powerful computers and need to re-test it on some older computers.

Safe & secure, just what I was looking for

Excellent module pour protéger sa vie privée