Collecting…
Includes the current entry: a fresh tab normally starts at 1. A larger count does not tell us whether a merchant page is in the history. History is recorded separately from the dimension hash.
Wait three seconds. Copy a comparison link in CCT, then open that link in external Chrome. The baseline travels in the URL fragment, so shared storage is not required.
Collecting samples…
Waiting…
The SHA-256 input contains the user agent, inner and outer dimensions, screen and available screen dimensions, device pixel ratio, and visual viewport dimensions and scale. Timing and event names are excluded.
Scroll down and take another sample to check whether toolbar changes affect the hash. A mismatch means the measured inputs changed; it does not identify CCT.