$ fingerprint@info:~ echo $JS-ECHO
Most of the features used for this fingerprinting technique should extend the possibilities for web developers and allow to gather basic information about the browser to enhance the user experience. In the table below, for each test case, the specification of the tested feature can be found in the references column.
JSEcho, is, in a broader sense, a variation of the first browser fingerprinting suite proposed by Peter Eckersley
(a demonstration test launched on panopticlick.eff.org in 2010).
Flash Player were replaced by newer technologies. These stale features are therefore removed and not used in this fingerprinting suite.
For example, window.Intl.DateTimeFormat().resolvedOptions() property readouts:
$ fingerprint@info:~ run js-echo-demo