Site Behavior Lab · Evidence

cdc.gov recorded 3 fewer third-party requests in the visit configured for Brave-list blocking.

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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.

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Integrity and provenance

Evidence receipt

Open report JSONOpen provenance sidecar
Report ID
20260721-7df3454ef345f3fc119bbca650219f24
Site
www.cdc.gov
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
149.0.7827.55
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
149.0.7827.55
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.

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

www.cdc.gov

https://www.cdc.gov/

complete; derived from status and warningsJul 21, 2026, 4:55 AM UTC

What this actually means

cdc.gov recorded 3 fewer third-party requests in the visit configured for Brave-list blocking.

The visit with no blocking made 51 requests; the visit configured to apply Brave's ad-block engine and default Shields filter lists (a simulation in this scanner's browser, not a live Brave-browser visit) recorded 3 fewer third-party requests. The blocker directly stopped 3 requests; the remaining difference may include follow-on requests that never started once their sources were blocked, plus run-to-run variance.

1tracking company
4data requests sent off-site
Observed in two automated visits: evidence to check, not a verdict.

Detailed evidence

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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.