Cover Your Tracks two things: a tool for users to understand how unique and identifiable their browser makes them online, and a research project to uncover the tools and techniques of online trackers and test the efficacy of privacy add-ons. Running tests on Cover Your Tracks gives you information about your own browser’s privacy protections, and also helps EFF use statistical methods to evaluate the capabilities of third-party trackers and the best forms of protection against them….Our new version of the project, rebranded and launched in 2020 as Cover Your Tracks, researches both how unique your browser is and how effective tracker blockers are. We analyze how well you are protected against online tracking by checking the privacy protections you have in place. The test simulates loading of various types of trackers, and determines your level of protection based on if the trackers load or not.

Even if your privacy add-ons are working well, you may still be vulnerable if your browser fingerprint is unique. So we also analyze the uniqueness of your browser and let you know how it stacks up to other visitors we’ve observed recently. We generate a report about your tracker protections and browser fingerprint for your own use, and we’ll use anonymous results from your test when generating uniqueness results for others when they take the test.