A web page that tells you what your browser gave away the moment you arrived. No login, no form, no permission. Most pages do this. None of them tell you.
Only a handful of data points surfaces by this website come from JS APIs, most are either header-based or some other browser behaviour that is independent from JS
Only a handful of data points surfaces by this website come from JS APIs, most are either header-based or some other browser behaviour that is independent from JS