http://dds6qkxpeiqvogt4y2fd7vtsxq6pvokekb2h4la7jd4iwl4ljuawu5qd.onion/wiki/Browser_Tests
There are certainly too few volunteers who are seriously focused on testing browsers and defeating browser fingerprinting methods. If you are reading this page, then it is safe to assume being anonymous (less unique), and remaining so is of great interest.