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

www.bestbuy.com

https://www.bestbuy.com/

Jul 27, 2026, 9:55 AM UTC

complete; derived from status and warnings

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

Scan report ready for www.bestbuy.com: 475 recorded request rows.

Comparison Reportv1 schema · facts legacy-derived · descriptive report

Brave-list blocking off/on comparison

https://www.bestbuy.com/ (opens in a new tab)
ShareDownloads the No blocking visit's request CSV, source report and correction context in a ZIP. Follows the evidence switcher below.PDF + evidence (opens in a new tab)Downloads a ZIP containing the PDF for every recorded visit, exact source JSON, correction context and file hashes. The scanner renders it on request.

What this actually means

bestbuy.com recorded 203 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.

9tracking-service entities
252cross-site requests
26third-party cookie records
3fingerprint-like patterns

Plain-Language Findings

What this visit means

Unfamiliar terms are defined in the glossary
playwright-chromium

Review-worthy

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.

475 requests observed in one controlled visit.

Worth checking

183 requests matched Brave Shields filter lists

183 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 122 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 203 fewer third-party requests, 25 fewer third-party cookies and 122 fewer tracking-related service requests.

Services only seen in the unblocked visit: Google, Adobe and OpenX, plus 6 others. The blocking visit's engine directly blocked 43 requests; 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

Review-worthy

Catalogued service domains recorded responses during this visit

Google, Adobe and OpenX, plus 6 others appeared in the request log.

A catalog match identifies a maintainer-reviewed service/domain mapping; it does not establish why an individual request occurred, what it carried, or whether profiling happened. Functional catalog labels include advertising, analytics / tag management and analytics / advertising. This scan could not identify 19 of the 38 third-party hosts recorded here, so it cannot say who operates them. That is a limit of identity coverage, not evidence about the site.

252 cross-site requests across 38 third-party hosts.Elevated distinct tracking-service entities count (at or above the 6 reference threshold).Show third-party requests

Context

Requests were dispatched to catalogued major-platform domains

This visit dispatched requests to catalogued domains for Google and Microsoft.

The domain matches identify services, not the requests' purpose, payload, or whether any profile linking occurred.

98 requests to these platforms.Show catalog-matched requests

Nothing observed

Google Analytics present, no remarketing signal

Google Analytics was observed, but no DoubleClick remarketing sync appeared in this visit.

Standard analytics collection was observed, without the stats.g.doubleclick.net advertising sync.

Google Analytics host observed; no stats.g.doubleclick.net request.Show catalog-matched requests

Review-worthy

Third-party cookies were present

26 third-party cookies 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.

53 cookies total in this report.High third-party cookies count (at or above the 12 reference threshold).

Context

Input-monitoring signal involving a third-party script

Listener coverage that could observe typing-related input events was registered through call chains that included a third-party script.

This is a behavioral instrumentation signal from listener registration, stack-attributed script origins, and known-vendor requests: it shows the page was instrumented to observe interaction, not that anything was transmitted. Stack attribution records the script origins present in the bounded registration call chain; a cross-site origin in that chain does not by itself establish that the cross-site script registered the listener, because first-party code can register its own listeners through a helper served from elsewhere. A different registrable domain is also not by itself a different operator: sites commonly serve their own scripts from a separate asset domain, so the card says third party only when the catalog or reviewed ownership attributes an origin to another organization. On scanners that run the active keystroke-capture probe, actual transmission is tested separately (a synthetic value is typed, never real input, and no typed values are collected); treat this card as a review prompt rather than proof.

10 interaction-listener registrations with https://*.*.doubleclick.net/, https://www.googletagmanager.com/ and https://www.gstatic.com/ in the registration call chain and 5 input-listener registrations with https://*.*.doubleclick.net/, https://www.googletagmanager.com/ and https://www.gstatic.com/ in the registration call chain

Worth checking

Behavioral fingerprinting heuristics matched

3 behavioral heuristics matched: Offline audio rendering heuristic, Canvas fingerprinting heuristic and Canvas font probing heuristic.

These heuristics look for behavior patterns such as canvas readback after drawing, repeated canvas font measurement, WebGL entropy reads, offline audio rendering, or WebRTC peer-connection setup. They are review prompts for this visit, not proof of cross-site identity tracking.

2 offline renders with audio.OfflineAudioContext.createAnalyser, audio.OfflineAudioContext.createDynamicsCompressor and audio.OfflineAudioContext.createOscillator, plus 2 others, 1 canvas matched; reads: canvas.toDataURL and 11 measureText calls across up to 11 fonts; measured text contents are not stored

Brave Shields Comparison

No blocking → Brave-list blocking delta

No blocking: 30,673msBrave-list blocking: 31,572ms
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-240No blocking: 475 · Brave-list blocking: 235
Third-party requests-203No blocking: 252 · Brave-list blocking: 49
Third-party domains-32No blocking: 38 · Brave-list blocking: 6
Cookies-32No blocking: 53 · Brave-list blocking: 21
Third-party cookies-25No blocking: 26 · Brave-list blocking: 1
Storage keys-11No blocking: 31 · Brave-list blocking: 20
Catalog-matched requests-122No blocking: 122 · 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

*.*.doubleclick.netGoogle · advertisingNo blocking: 44 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-44
www.google.comunlabeled third partyNo blocking: 42 · Brave-list blocking: 5Show No blocking requests · Show Brave-list blocking requests-37
www.bestbuy.comfirst partyNo blocking: 217 · Brave-list blocking: 182Show No blocking requests · Show Brave-list blocking requests-35
www.googleadservices.comGoogle · advertisingNo blocking: 32 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-32
*.googlesyndication.comGoogle · advertisingNo blocking: 13 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-13
*.adsafeprotected.comunlabeled third partyNo blocking: 11 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-11
*.demdex.netAdobe · analytics / advertisingNo blocking: 8 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-8
*.openx.netOpenX · advertising / exchangeNo blocking: 7 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-7
*.*.dynatrace.comunlabeled third partyNo blocking: 5 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-5
*.adtrafficquality.googleunlabeled third partyNo blocking: 5 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-5
*.speedcurve.comunlabeled third partyNo blocking: 4 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-4
pixel.adsafeprotected.comunlabeled third partyNo blocking: 4 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-4
*.bestbuy.comfirst partyNo blocking: 5 · Brave-list blocking: 2Show No blocking requests · Show Brave-list blocking requests-3
*.*.ensighten.comunlabeled third partyNo blocking: 3 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-3
*.analytics.yahoo.comunlabeled third partyNo blocking: 3 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-3
ad.doubleclick.netGoogle · advertisingNo blocking: 3 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-3
*.adsrvr.orgThe Trade Desk · advertising / demand-side platformNo blocking: 2 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-2
*.crwdcntrl.netLotame · advertising / data managementNo blocking: 2 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-2
*.google.comGoogle · advertisingNo blocking: 2 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-2
*.rlcdn.comLiveRamp · identity / advertisingNo blocking: 2 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-2
www.googletagmanager.comGoogle · analytics / tag managementNo blocking: 2 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-2
*.*.*.bestbuy.comfirst partyNo blocking: 1 · Brave-list blocking: 2Show No blocking requests · Show Brave-list blocking requests+1
*.*.googlesyndication.comGoogle · advertisingNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
*.acuityplatform.comunlabeled third partyNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
*.agkn.comunlabeled third partyNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
*.bing.comMicrosoft · advertising / analyticsNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
*.creativecdn.comunlabeled third partyNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
*.criteo.comCriteo · advertisingNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
*.nc0.counlabeled third partyNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
*.openxcdn.netunlabeled third partyNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
*.pro-market.netunlabeled third partyNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
*.rubiconproject.comMagnite · advertising / supply-side platformNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
ad.turn.comunlabeled third partyNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
cdn.adsafeprotected.comunlabeled third partyNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
static.adsafeprotected.comunlabeled third partyNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
static.criteo.netCriteo · advertisingNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1

Domains only with Brave-list blocking

No domain changes observed.

Domains only with No blocking

*.*.doubleclick.netGoogle · advertising · Show No blocking requests44
www.googleadservices.comGoogle · advertising · Show No blocking requests32
*.googlesyndication.comGoogle · advertising · Show No blocking requests13
*.adsafeprotected.comunlabeled · Show No blocking requests11
*.demdex.netAdobe · analytics / advertising · Show No blocking requests8
*.openx.netOpenX · advertising / exchange · Show No blocking requests7
*.*.dynatrace.comunlabeled · Show No blocking requests5
*.adtrafficquality.googleunlabeled · Show No blocking requests5
*.speedcurve.comunlabeled · Show No blocking requests4
pixel.adsafeprotected.comunlabeled · Show No blocking requests4
*.*.ensighten.comunlabeled · Show No blocking requests3
*.analytics.yahoo.comunlabeled · Show No blocking requests3
ad.doubleclick.netGoogle · advertising · Show No blocking requests3
*.adsrvr.orgThe Trade Desk · advertising / demand-side platform · Show No blocking requests2
*.crwdcntrl.netLotame · advertising / data management · Show No blocking requests2
*.google.comGoogle · advertising · Show No blocking requests2
*.rlcdn.comLiveRamp · identity / advertising · Show No blocking requests2
www.googletagmanager.comGoogle · analytics / tag management · Show No blocking requests2
*.*.googlesyndication.comGoogle · advertising · Show No blocking requests1
*.acuityplatform.comunlabeled · Show No blocking requests1
*.agkn.comunlabeled · Show No blocking requests1
*.bing.comMicrosoft · advertising / analytics · Show No blocking requests1
*.creativecdn.comunlabeled · Show No blocking requests1
*.criteo.comCriteo · advertising · Show No blocking requests1
*.nc0.counlabeled · Show No blocking requests1
*.openxcdn.netunlabeled · Show No blocking requests1
*.pro-market.netunlabeled · Show No blocking requests1
*.rubiconproject.comMagnite · advertising / supply-side platform · Show No blocking requests1
ad.turn.comunlabeled · Show No blocking requests1
cdn.adsafeprotected.comunlabeled · Show No blocking requests1
static.adsafeprotected.comunlabeled · Show No blocking requests1
static.criteo.netCriteo · advertising · Show No blocking requests1

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

MUID.bing.comthird-party
IDE.doubleclick.netthird-party
_gcl_au.bestbuy.comfirst-party

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

Google7 domains97
Adobe1 domain8
OpenX1 domain7
Criteo2 domains2
LiveRamp1 domain2
Lotame1 domain2
The Trade Desk1 domain2
Magnite1 domain1
Microsoft1 domain1

Measurement limits

9 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.
  • The page did not reach network idle before the scan window ended.
  • This scan typed a synthetic test value into 2 form fields (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.

No blocking visit only

  • Blocked a request that could not be verified as public: https://{label}.{label}.addthis.com/{seg}/{seg}
  • Blocked a request that could not be verified as public: https://{label}.owneriq.net/{seg}/{seg}/{seg}

Brave-list blocking visit only

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

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.

Report ID
20260727-57ca2b2010e081545a52b26690c77b98
Site
www.bestbuy.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
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.

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 .