Browser Health Check

This page measures every parameter of the fingerprint registry that a website can read, in four separate JavaScript realms, and compares the result against what the server observed on the wire. Opening the page starts a run; the full report appears below when it finishes.

Starting…

Four surfaces will not answer a browser without a real click first: your screen layout, clipboard state, window management and your installed font list. On a desktop Chrome that is the difference between 585 and 697 parameters measured; on a browser that declines those permissions it is smaller. Nothing that raises a permission pop-up is ever requested, and the run completes either way.