Profile age and cross-site history boundary
Check id profile-age-boundary
What an ordinary browser yields
N/A.
What a detector infers
Privacy boundaries prevent reading global history or true profile age.
How to resolve it
Do not relabel origin state as global age.
Nearby checks in Navigator identity
- a worker resolves the same IANA timezone as the main thread
worker-main-timezone-coherenceA browser has one host timezone, and the specification ties both the main-thread global and every worker global to it, so a real browser… - the keyboard layout maps the OEM keys the way one real Windows layout would
keyboard-layout-single-originA keyboard layout is not a set of independent key mappings — it is one artifact the operating system hands over whole. - navigator.appVersion is the user agent minus its leading token
appversion-vs-useragentnavigator.appVersion is not an independent fact. In Blink and WebKit it is computed from the User-Agent at read time — literally the UA with… - Trusted Types hands back the branded object its own type demands
trusted-types-value-invariantTrusted Types is a typed API, not a boolean feature flag, and that is the whole of the check. - the user agent on the wire and the one JavaScript reports describe the same browser
ua-wire-vs-navigatorYour user agent is asserted on two channels built by different layers: the network stack writes the header, and the renderer answers… - a Date's own text agrees with the Date's own offset
date-tostring-coherenceA Date's text is not opaque. ECMA-262 defines toString() as toDateString() + " " + toTimeString(), fixes the weekday and month tables to… - Origin-scoped storage and browsing state
origin-storage-historyCookies, storage, IndexedDB, and same-tab history reveal only this origin's state. - Account reputation boundary
account-reputation-boundaryAccount reputation needs authentication and server history, neither of which this public audit has.
Clearcote is a browser built for fingerprint coherence
It is a Chromium fork, maintained by the same people who wrote this reference. It ships as a compiled browser rather than as a stealth script injected into someone else's — which is a description of how it is built, and is not an argument about how it behaves on this check.
This audit takes no position on how Clearcote scores on Navigator identity checks, on this one, or anywhere else. It has no baseline corpus of other people's fingerprints to rank you against and no vendor scoreboard — nearly every check is self-referential, asking one browser the same question through two independent APIs and reporting whether both answers can be true at once. It runs identically on any browser, including ours. Run it on yours and read the result yourself.
See the other checks in Navigator identity — the family profile-age-boundary belongs to.