Site Behavior Lab · Evidence

facebook.com triggered fingerprint-like browser API patterns.

Currently retained public corpus evidence

This versioned report is currently retained in the public corpus. Follow the currently retained site history, repeat the same public route when it is available, or request a transparent evidence correction.

Integrity and provenance

Evidence receipt

Report ID
20260810-b4432493cf36950d5cf891d7c74d729b
Site
www.facebook.com
Latest visit
Schema
v1 schema · facts legacy-derived · descriptive report
Verify recorded provenance

Baseline visit

Started
Run quality
complete; derived from status and warnings
Scanner
playwright-chromium
Browser
151.0.7922.34
Redaction
not recorded by this schema
Provenance
Exact build and instrument digests were not recorded by this legacy schema.

Variant visit

Started
Run quality
complete; derived from status and warnings
Scanner
playwright-chromium
Browser
151.0.7922.34
Redaction
not recorded by this schema
Provenance
Exact build and instrument digests were not recorded by this legacy schema.

Recorded provenance is self-reported measurement metadata, not a cryptographic attestation. The public versioned report JSON contains the retained public evidence; see the methodology for interpretation and retention limits.

Approved use boundary: This report is investigative evidence that requires independent corroboration. It is not a standalone legal determination and not the sole exhibit in a legal proceeding.Recorded in this project's release manifest on .

Recorded visit v1 schema · facts legacy-derived · descriptive report

www.facebook.com

https://www.facebook.com/

complete; derived from status and warningsAug 10, 2026, 7:09 AM UTC

What this actually means

facebook.com triggered fingerprint-like browser API patterns.

3 browser-fingerprinting heuristics matched. These are heuristic review signals, not proof of fingerprinting intent.

2cross-site domains
21cross-site requests
3fingerprint-like patterns

Detailed evidence

Open the interactive evidence explorer

Load request rows, domains, cookies, storage, browser signals, visit phases, charts, and CSV export only when you need them. The versioned report JSON remains available above without this interface.