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

www.rfc-editor.org

https://www.rfc-editor.org/

Aug 3, 2026, 11:00 AM UTC

complete; derived from status and warnings

View site history Scan this exact route again

Public corrections ledger · SBL-CORR-2026-001

This report has a reviewed clarification

SBL-CORR-2026-001: The historical input-probe disclosure overstates coverage. Unload-only transmissions were not reliably recorded. Focus and blur handlers could run, and per-field failures were not fully counted. These reports cannot establish absence of input transmission outside their retained observations.

Read the public review record

Comparison Reportv1 schema · facts legacy-derived · descriptive report

Brave-list blocking off/on comparison

https://www.rfc-editor.org/

SharePDF + evidence

What this actually means

rfc-editor.org recorded 4 fewer third-party requests in the visit configured for Brave-list blocking.

SBL-CORR-2026-001: The historical input-probe disclosure overstates coverage. Unload-only transmissions were not reliably recorded. Focus and blur handlers could run, and per-field failures were not fully counted. These reports cannot establish absence of input transmission outside their retained observations.

2cross-site domains

6cross-site requests

1third-party cookie record

Plain-Language Findings

What this visit means

Unfamiliar terms are defined in the glossary

playwright-chromium

Context

Bottom line: this visit has review-worthy signals

The scan observed signals a non-expert should not have to decode from raw request tables.

The cards below translate the evidence into plain language; severity reflects fixed reference thresholds, not measured population percentiles. The request log, domain table, and methodology remain below for verification.

31 requests observed in one controlled visit.

Context

4 requests matched Brave Shields filter lists

4 requests matched the default filter lists of Brave Shields, the ad and tracker blocker built into the Brave browser, while loading normally.

Computed with Brave's own ad-block engine and default filter lists in classification mode: matched requests were not blocked by the scanner and remain in this report's observed request counts. Matching shows what Shields would target on this visit's traffic; an actual Shields visit blocks these and also prevents their follow-on requests, so this number is neither a measured block count nor the total effect.

The hand-curated service catalog separately matched 0 request rows in this visit.Show matched requests

Nothing observed

Lower values observed across comparable metrics in the Brave-list blocking attempt

With the scanner 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; application was not verified), this paired visit showed 4 fewer third-party requests.

The blocking visit's engine directly blocked 1 request; the remaining difference may include follow-on requests that never started once their sources were blocked. A single paired comparison can also reflect run-to-run variance (ad rotation, caching, experiments), so treat this as an observed difference, not a measured blocking rate.

Signed per-metric differences between the two visits; nothing is summed across metrics.Show matched requests

Context

No known services matched

This scan did not match any third-party domains to the service catalog or another identity source.

No known operator or catalog entity was matched. This scan could not identify 2 of the 2 third-party hosts recorded here, so it cannot say who operates them. That is a limit of identity coverage, not evidence about the site.

6 cross-site requests across 2 third-party hosts.Modest third-party domains count.Show third-party requests

Nothing observed

No requests to major-platform domains were recorded

No requests to catalogued Google, Meta, TikTok, X, Microsoft, LinkedIn, or Pinterest domains were observed in this visit.

Major-platform domains were not observed in this single passive visit; interaction-gated requests could still load for real users.

2 cross-site domains seen overall.Show catalog-matched requests

Nothing observed

No Google Analytics observed

This visit did not contact Google Analytics.

Neither Google Analytics nor its remarketing sync was observed in this visit.

No google-analytics.com or googletagmanager.com requests.Show catalog-matched requests

Context

Third-party cookies were present

1 third-party cookie showed up during the visit.

The scanner observed cookie metadata whose domain crossed the scanned site's registrable-domain boundary. This report does not retain cookie values or partition keys, so it does not establish whether a cookie was a persistent identifier or could recognize a visitor across sites.

4 cookies total in this report.Modest third-party cookies count.

Nothing observed

No fingerprint-like API calls observed

The scan did not observe the instrumented high-entropy browser APIs.

This is an observation layer, not proof that fingerprinting is impossible.

0 API families recorded.

Brave Shields Comparison

No blocking → Brave-list blocking delta

No blocking: 6,148msBrave-list blocking: 5,144ms

Some deltas are not comparable across these two visits and are not shown.

Other detector and causal-path deltas (each visit's own evidence still renders below): v1 never recorded detector versions, so fingerprinting and pixel deltas cannot be proven to come from matching instrumentation.
The Shields-number delta (each visit's own evidence still renders below): The two visits measured different Shields quantities (filter-list matches vs engine-blocked requests), which must never share a delta.
Fingerprinting deltas (each visit's own evidence still renders below): At least one visit did not complete the fingerprint measurement, so no exact cross-visit delta is shown.
Ad-pixel deltas (each visit's own evidence still renders below): At least one visit did not complete the pixel measurement, so no exact cross-visit delta is shown.

Requests-4No blocking: 31 · Brave-list blocking: 27

Third-party requests-4No blocking: 6 · Brave-list blocking: 2

Third-party domains-1No blocking: 2 · Brave-list blocking: 1

Cookies-2No blocking: 4 · Brave-list blocking: 2

Third-party cookies0No blocking: 1 · Brave-list blocking: 1

Storage keys0No blocking: 1 · Brave-list blocking: 1

Catalog-matched requests0No blocking: 0 · Brave-list blocking: 0

Every signed change is Brave-list blocking minus No blocking. A positive or negative direction is descriptive, not a judgment that the result is better or worse.

Cookie and storage count deltas include every observation. Name-level lists show only reviewed names; unreviewed names are not itemized because they can contain identifiers.

Largest per-domain request-count changes

analytics.ietf.orgunlabeled third partyNo blocking: 4 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-4

Domains only with Brave-list blocking

No domain changes observed.

Domains only with No blocking

analytics.ietf.orgunlabeled · Show No blocking requests4

Visible cookie names only with Brave-list blocking

No visible cookie-name changes to show; privacy-filtered names are not itemized.

Visible cookie names only with No blocking

No visible cookie-name changes to show; privacy-filtered names are not itemized.

Visible storage keys only with Brave-list blocking

No visible storage-key changes to show; privacy-filtered keys are not itemized.

Visible storage keys only with No blocking

No visible storage-key changes to show; privacy-filtered keys are not itemized.

Entities only with Brave-list blocking

No entity changes observed.

Entities only with No blocking

No entity changes observed.

Measurement limits

6 conditions affect how this evidence reads

This report

Brave-list blocking comparison runs should be collected under matched crawl conditions, and the blocking run is a simulation with Brave's engine and default lists in this scanner's browser, not a live Brave visit. Differences can still reflect timing, experiments, cache state, consent state, or bot detection.
The two visits ran in randomized order; the "No blocking" visit ran first.

Both visits

Each visit in this report is one automated, headless Chromium visit from a fixed en-US / UTC profile, with no scrolling, clicking, or consent interaction. Sites can behave differently for real users, browsers, regions, accounts, or network locations.
Counts are a lower bound: trackers that load only after interaction or consent are not observed; Service Workers are blocked, and Web Worker or WebSocket traffic may be incomplete. Service labels use a US-biased hand-curated catalog, so regional services may be under-labeled. Cookie and storage figures are an end-of-visit snapshot, with storage keys read from the top frame only.
This scan typed a synthetic test value into 1 form field (never submitting the form) to test whether typed input is captured and sent to third parties. The value is synthetic and is not stored. Requests the page sent during and after this typing, including any unload beacons, are part of the recorded request log and counts.

Brave-list blocking visit only

Brave Shields block simulation was enabled; matching requests were aborted before loading and are not included in request totals.

How to use this report

Read the findings and measurement limits first, then inspect the evidence for each recorded visit. Comparisons include both visits, even where a difference cannot be interpreted.

Keep this PDF with its evidence package: the source JSON, correction context, export receipt and SHA256SUMS. The package preserves source bytes and the correction context at export time. Hashes check file consistency; they do not establish independent measurement accuracy or a signed attestation.

Correction context SHA-256: 8b4dc650c91f9e1a20f651118d74586978963548cecaa5885e2565e2ccc68c32

Renderer revision: 3c18992e02534f33c825f7c2e51dd534d3ccab0d

No blocking — evidence

2026-08-03T11:00:01.790Z · complete; derived from status and warnings

Retained observations from this visit. Missing measurements do not establish absence of activity.

Request attribution map

Which actor each third-party request is attributed to, from the initiator the browser reported. Attribution, not causation: an initiator may itself have been told what to fetch, and requests with no reported initiator are not distinguished from ones fetched from several. Asterisks mark subdomain labels hidden for privacy.

Attributed requests: 0
Not attributable: 6
Third-party requests: 6

No unique actor could be assigned to 6 of these requests. That includes requests for which the browser reported no usable initiator, and repeated URLs seen with conflicting initiators. This report does not distinguish those causes, so they are counted together rather than drawn.

6 third-party requests: 0 attributed to a single recorded actor, 6 not attributable.

No retained third-party request has one recorded actor to draw. This is not evidence that no actor was involved: the visit may have reported no actor or several actors for the same request.

By the numbers

Recorded counts and evidence availability from this one visit. The findings above interpret them.

Requests316 third-party

Matched Shields lists4classification reported by this visit; no engine readback recorded

Third-party domains20 distinct catalogued service entities

Cookies41 third-party

Storage keys11 key privacy-filtered; values omitted

Fingerprint API calls00 API families

GPC signalConfigured offreadback not recorded

Duration6.1s11:00:01 AM UTC

Request composition & timeline

First-party requests 25

Other third-party requests 6

Catalog-matched third-party requests 0

31 requests were recorded from 39 ms to 2,123 ms. Open the request log for exact timing and request details.

0 ms2,123 ms

Top Third Parties

analytics.ietf.orgoperator unidentified

static.ietf.orgoperator unidentified

Advertising Pixels

This legacy report did not record pixel evidence; an empty display is not an absence finding.

Cookies

www.rfc-editor.org2

first-party · 2 persistent

.ietf.org1

third-party · 1 persistent

__cf_bm

.rfc-editor.org1

first-party · 1 persistent

__cf_bm

2 cookie names hidden because unreviewed names can contain identifiers. Cookie values are never recorded.

Storage

localStorage1

1 key · 6 bytes recorded

1 storage key hidden because unreviewed keys can contain identifiers. Values are not stored; only byte counts are kept.

Browser Behavior Signals

No instrumented high-entropy API or interaction listener signals were observed.

Methodology

Schema: v1 schema · facts legacy-derived · descriptive report
Run quality: complete; derived from status and warnings
Scanner: playwright-chromium
Playwright: 1.62.0
Browser: 151.0.7922.34
Timezone: UTC
Headless: yes
Viewport: 1440×980
GPC: configured off · readback not recorded
Egress: github-actions-ubuntu
Catalog: Hand-curated service catalog
US-biased · hand-curated-2026.08
146 entries
Brave Shields lists: Brave default ad-block lists
31 lists · fetched 7/25/2026

Automated Chromium scan using Playwright 1.62.0 from github-actions-ubuntu with browser 151.0.7922.34, timezone UTC, locale en-US, the listed viewport, and Brave Shields classification only. Brave-list matching uses each route-evaluated request's initiating document (the parent document for a subframe navigation), under methodology shields-request-context-v2-adblock-rust-0.13.2-request-method-v1-playwright-1.62.0+subject-validity-v2+detector-coverage-v2; main-frame navigations are not blocked or counted as matches, and redirect follow-up URLs that Playwright does not re-route are not independently evaluated. Treat results as reproducible evidence for this scan configuration, not a universal claim about all visitors.

Domain evidence

3 recorded domains

Every domain this visit recorded, with its role, request count and catalog match.
Domain	Role	Requests	Catalog match	Resource types
analytics.ietf.org	third-party	4	No catalog match	script, ping
static.ietf.org	third-party	2	No catalog match	stylesheet, font
www.rfc-editor.org	first-party	25	No catalog match	document, stylesheet, script, image, fetch

Request log

31 recorded requests

In hosts and URLs, * and … mark details hidden for privacy.

Request references name this visit's retained JSON rows in order (B = baseline, V = variant, S = single). R0001 is the first request row.

Every request row this visit retained, with its time, status, resource type, domain and recorded provenance.
Ref	Time	Status	Type	Domain	Provenance	URL
`B:R0001`	39ms	200	document	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/
`B:R0002`	389ms	200	stylesheet	static.ietf.org	Not attributed	https://static.ietf.org/…
`B:R0003`	390ms	200	stylesheet	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0004`	390ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0005`	507ms	200	image	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0006`	508ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0007`	508ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0008`	508ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0009`	509ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0010`	509ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0011`	509ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0012`	509ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0013`	550ms	200	image	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0014`	574ms	200	font	static.ietf.org	Not attributed	https://static.ietf.org/…
`B:R0015`	757ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0016`	888ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0017`	888ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0018`	1,116ms	200	script	analytics.ietf.org	Not attributed	https://analytics.ietf.org/…
`B:R0019`	1,149ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0020`	1,150ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0021`	1,150ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0022`	1,150ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0023`	1,150ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0024`	1,150ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0025`	1,150ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0026`	1,219ms	204	ping	analytics.ietf.org	Not attributed	https://analytics.ietf.org/…?…
`B:R0027`	1,373ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0028`	1,374ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`B:R0029`	2,020ms	204	ping	analytics.ietf.org	Not attributed	https://analytics.ietf.org/…?…
`B:R0030`	2,070ms	204	ping	analytics.ietf.org	Not attributed	https://analytics.ietf.org/…?…
`B:R0031`	2,123ms	200	fetch	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…

Brave-list blocking — evidence

2026-08-03T11:00:07.942Z · complete; derived from status and warnings

Retained observations from this visit. Missing measurements do not establish absence of activity.

Request attribution map

Attributed requests: 0
Not attributable: 2
Third-party requests: 2

No unique actor could be assigned to 2 of these requests. That includes requests for which the browser reported no usable initiator, and repeated URLs seen with conflicting initiators. This report does not distinguish those causes, so they are counted together rather than drawn.

2 third-party requests: 0 attributed to a single recorded actor, 2 not attributable.

No retained third-party request has one recorded actor to draw. This is not evidence that no actor was involved: the visit may have reported no actor or several actors for the same request.

By the numbers

Recorded counts and evidence availability from this one visit. The findings above interpret them.

Requests272 third-party

Blocked by Brave lists1engine blocks reported by this visit; no engine readback recorded

Third-party domains10 distinct catalogued service entities

Cookies21 third-party

Storage keys11 key privacy-filtered; values omitted

Fingerprint API calls00 API families

GPC signalConfigured offreadback not recorded

Duration5.1s11:00:07 AM UTC

Request composition & timeline

First-party requests 25

Other third-party requests 2

Catalog-matched third-party requests 0

27 requests were recorded from 39 ms to 1,795 ms. Open the request log for exact timing and request details.

0 ms1,795 ms

Top Third Parties

static.ietf.orgoperator unidentified

Advertising Pixels

This legacy report did not record pixel evidence; an empty display is not an absence finding.

Cookies

.ietf.org1

third-party · 1 persistent

__cf_bm

.rfc-editor.org1

first-party · 1 persistent

__cf_bm

Storage

localStorage1

1 key · 6 bytes recorded

1 storage key hidden because unreviewed keys can contain identifiers. Values are not stored; only byte counts are kept.

Browser Behavior Signals

No instrumented high-entropy API or interaction listener signals were observed.

Methodology

Schema: v1 schema · facts legacy-derived · descriptive report
Run quality: complete; derived from status and warnings
Scanner: playwright-chromium
Playwright: 1.62.0
Browser: 151.0.7922.34
Timezone: UTC
Headless: yes
Viewport: 1440×980
GPC: configured off · readback not recorded
Egress: github-actions-ubuntu
Catalog: Hand-curated service catalog
US-biased · hand-curated-2026.08
146 entries
Brave Shields lists: Brave default ad-block lists
31 lists · fetched 7/25/2026

Automated Chromium scan using Playwright 1.62.0 from github-actions-ubuntu with browser 151.0.7922.34, timezone UTC, locale en-US, the listed viewport, and Brave Shields block simulation. Brave-list matching uses each route-evaluated request's initiating document (the parent document for a subframe navigation), under methodology shields-request-context-v2-adblock-rust-0.13.2-request-method-v1-playwright-1.62.0+subject-validity-v2+detector-coverage-v2; main-frame navigations are not blocked or counted as matches, and redirect follow-up URLs that Playwright does not re-route are not independently evaluated. Treat results as reproducible evidence for this scan configuration, not a universal claim about all visitors.

Domain evidence

2 recorded domains

Every domain this visit recorded, with its role, request count and catalog match.
Domain	Role	Requests	Catalog match	Resource types
static.ietf.org	third-party	2	No catalog match	stylesheet, font
www.rfc-editor.org	first-party	25	No catalog match	document, stylesheet, script, image, fetch

Request log

27 recorded requests

In hosts and URLs, * and … mark details hidden for privacy.

Request references name this visit's retained JSON rows in order (B = baseline, V = variant, S = single). R0001 is the first request row.

Every request row this visit retained, with its time, status, resource type, domain and recorded provenance.
Ref	Time	Status	Type	Domain	Provenance	URL
`V:R0001`	39ms	200	document	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/
`V:R0002`	124ms	200	stylesheet	static.ietf.org	Not attributed	https://static.ietf.org/…
`V:R0003`	124ms	200	stylesheet	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0004`	125ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0005`	242ms	200	image	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0006`	245ms	200	image	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0007`	267ms	200	font	static.ietf.org	Not attributed	https://static.ietf.org/…
`V:R0008`	271ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0009`	271ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0010`	271ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0011`	272ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0012`	272ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0013`	272ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0014`	273ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0015`	467ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0016`	605ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0017`	606ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0018`	813ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0019`	814ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0020`	814ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0021`	815ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0022`	815ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0023`	815ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0024`	815ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0025`	1,027ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0026`	1,027ms	200	script	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…
`V:R0027`	1,795ms	200	fetch	www.rfc-editor.org	Not attributed	https://www.rfc-editor.org/…

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

Open report JSON Download corrections with this JSON Open provenance sidecar Printable version Download PDF + evidence Open PDF

Report ID: 20260803-ed8f0067ccb61fbca998ee4714f4b5d4
Site: www.rfc-editor.org
Latest visit: Aug 3, 2026, 11:00 AM UTC
Schema: v1 schema · facts legacy-derived · descriptive report

Verify recorded provenance

Baseline visit

Started: Aug 3, 2026, 11:00 AM UTC
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: Aug 3, 2026, 11:00 AM UTC
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.

This report covers what the scanner measures, not everything a site can do. 16 browser surfaces are not instrumented at all (Every page except the one that was scanned; Anything that only loads after scrolling or interaction; Why a request happened, as a causal chain; and 13 others), 3 capabilities are declined by policy, and 3 are outside what any single visit can see. Their absence from this report is not evidence that they did not occur. Read the published coverage boundary.

Detector accuracy is unmeasured. No calibration study currently publishes a precision or recall for the detectors on this page, so a detector match here is a recorded observation, not a calibrated classification. How detector accuracy is measured.

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 2026-08-02.