Skip to main content

Website evidence · pilot dataset

Does webmd.com fingerprint you?

Browser signals observed; fingerprinting is unconfirmed.

Browser API activity met a monitored signal threshold in the latest measured scans. The activity alone does not establish a tracking purpose.

Open evidence JSON ↗

All 6 source records are included in the JSON. Scan timestamps and versions are shown as recorded. The tabs show the latest usable homepage measurement for each setup. Later failed attempts remain in the history. Scan scope and methodology ↗

Inside the scan

← All websites

Visitor setup

Signals observed

1 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Observed
Measurement
Measured · Partial load
Page context
Page document
Scan time
2026-10-22T17:07:17.016536Z
Browser / scanner
156.0.8078.4 / 0.4

Captured titleWebMD - Better information. Better health.

CanvasDraws text and reads canvas output.2 API entries

Observed requires a text-drawing API and a canvas readback API. Guide ↗

canvas.getContext1 calls
  • https://img.lb.wbmdstatic.com/webmd_static_vue/file-explorer/webmd/consumer_assets/site_images/webmd-ccm/otCCPAiab.min.jsline 2 · col 286
canvas.getContext1 calls

Frame: https://www.webmd.com/

  • Inline caller recorded
WebGLQueries the graphics environment.0 API entries

Observed requires at least three distinct WebGL probing APIs. Guide ↗

No matching API call was captured.

AudioRenders or reads audio samples.0 API entries

Observed requires offline rendering, buffer reads, or analyser reads. Guide ↗

No matching API call was captured.

FontsMeasures text repeatedly.0 API entries

Observed requires at least ten text-measurement calls. Guide ↗

No matching API call was captured.

DeviceReads browser and display properties.4 API entries

Observed requires at least three distinct browser, screen, or window properties. Guide ↗

navigator.maxTouchPoints2 calls

Frame: https://www.webmd.com/

  • https://img.lb.wbmdstatic.com/webmd_static_vue/file-explorer/webmd/consumer_assets/site_images/webmd-ads-framework/js/webmd-ads-framework-consumer.min.jsline 2 · col 2440
navigator.userAgent85 calls

Frame: https://www.webmd.com/

  • https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202610190101/pubads_impl.jsline 19 · col 3706
  • https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202610190101/pubads_impl.jsline 19 · col 152954
  • https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202610190101/pubads_impl.jsline 19 · col 153662
  • https://securepubads.g.doubleclick.net/tag/js/gpt.jsline 6 · col 1336
  • https://securepubads.g.doubleclick.net/tag/js/gpt.jsline 11 · col 33529
screen.height2 calls

Frame: https://www.webmd.com/

  • https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202610190101/pubads_impl.jsline 19 · col 152889
screen.width2 calls

Frame: https://www.webmd.com/

  • https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202610190101/pubads_impl.jsline 19 · col 152871
Providers, script signatures, and DNS 1 provider labels

Provider labels and static signatures are scanner observations. A library-name match does not establish that its code executed.

  • Google Adssecurepubads.g.doubleclick.net

Static script signatures

  • https://img.lb.wbmdstatic.com/webmd_v1_static_vue/[redacted-id]/client/js/app-core.160df7b9.jsreCAPTCHA · 0 API patterns
  • https://www.google.com/recaptcha/enterprise.jsreCAPTCHA · 0 API patterns
Network and worker observations 144 requests
Captured scripts
9
Instrumented frames
2
Google Ads observed
Yes
Transmission evidence
Not validated

Legacy transmission hints are excluded. A request after an API call does not establish that the extracted value was sent.

Third-party hosts

  • assets.adobedtm.com
  • c.amazon-adsystem.com
  • cdn.cookielaw.org
  • cdn.id5-sync.com
  • dyv1bugovvq1g.cloudfront.net
  • fid.agkn.com
  • geolocation.onetrust.com
  • img-embody.lb.wbmdstatic.com
  • img.lb.wbmdstatic.com
  • img.wbmdstatic.com
  • pub.doubleverify.com
  • securepubads.g.doubleclick.net
  • warp.media.net
  • www.google.com
  • www.gstatic.com
Other recorded API calls 2
  • document.cookie.read48 calls
  • document.cookie.write2 calls
Source record and integrity
Original source
results/headful/webmd-com-20261022T170717.json
Original file SHA-256
9acfb5484c034efa7508da2a06364be3f1a34dc191bf6351773728cfdfcc9410

Run ID: headful-9acfb5484c03. The JSON contains sanitized observations, not the original private scan payload.

Other scan attempts (3)

Visitor setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-21T22:52:32.461876Z
Browser / scanner
156.0.8078.4 / 0.3
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headful/webmd-com-20261021T225232.json
Original file SHA-256
bc6e8fca4295dc7d05e6ab18e330c3f6498a65da7cda1a5d1ba0868c0567e5de

Run ID: headful-bc6e8fca4295. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Scanner error

Scanner error

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Scanner error
Page context
Page not measured
Scan time
2026-10-22T17:05:42.531382Z
Browser / scanner
156.0.8078.4 / 0.4
Scanner error — no usable scan result

The scanner crashed while collecting this page. No usable API results were saved for this setup. A fresh scan is needed; this is not a site-blocking verdict.

Source record and integrity
Original source
results/headful/webmd-com-20261022T170542.json
Original file SHA-256
8611889e57f88d1ea2e012c4b31412704cd8f0ed9be99a2d15513dd59932e786

Run ID: headful-8611889e57f8. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Scanner error

Scanner error

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Scanner error
Page context
Page not measured
Scan time
2026-10-22T17:07:15.955608Z
Browser / scanner
156.0.8078.4 / 0.4
Scanner error — no usable scan result

The scanner crashed while collecting this page. No usable API results were saved for this setup. A fresh scan is needed; this is not a site-blocking verdict.

Source record and integrity
Original source
results/headful/webmd-com-20261022T170715.json
Original file SHA-256
8fc0450d49dcc8c5e3c6a645ff6c5193134474090cac049634c03ac0cd01a9f1

Run ID: headful-8fc0450d49dc. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Signals observed

1 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Observed
Measurement
Measured · Partial load
Page context
Page document
Scan time
2026-10-22T19:24:55.538258Z
Browser / scanner
156.0.8078.4 / 0.4

Captured titleWebMD - Better information. Better health.

CanvasDraws text and reads canvas output.2 API entries

Observed requires a text-drawing API and a canvas readback API. Guide ↗

canvas.getContext1 calls

Frame: https://www.google.com/recaptcha/enterprise/anchor

  • Inline caller recorded
canvas.getContext1 calls

Frame: https://www.webmd.com/

  • Inline caller recorded
WebGLQueries the graphics environment.0 API entries

Observed requires at least three distinct WebGL probing APIs. Guide ↗

No matching API call was captured.

AudioRenders or reads audio samples.0 API entries

Observed requires offline rendering, buffer reads, or analyser reads. Guide ↗

No matching API call was captured.

FontsMeasures text repeatedly.0 API entries

Observed requires at least ten text-measurement calls. Guide ↗

No matching API call was captured.

DeviceReads browser and display properties.4 API entries

Observed requires at least three distinct browser, screen, or window properties. Guide ↗

navigator.userAgent25 calls

Frame: https://www.google.com/recaptcha/enterprise/anchor

  • https://www.gstatic.com/recaptcha/releases/[redacted-id]/recaptcha__en.jsline 535 · col 495
navigator.userAgent111 calls

Frame: https://www.webmd.com/

  • https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202610200101/pubads_impl.js
  • https://securepubads.g.doubleclick.net/tag/js/gpt.jsline 6 · col 1336
  • https://securepubads.g.doubleclick.net/tag/js/gpt.jsline 11 · col 33529
  • https://www.gstatic.com/recaptcha/releases/[redacted-id]/recaptcha__en.jsline 535 · col 495
screen.height2 calls

Frame: https://www.webmd.com/

  • https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202610200101/pubads_impl.js
screen.width2 calls

Frame: https://www.webmd.com/

  • https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202610200101/pubads_impl.js
Providers, script signatures, and DNS 1 provider labels

Provider labels and static signatures are scanner observations. A library-name match does not establish that its code executed.

  • Google Adssecurepubads.g.doubleclick.net

Static script signatures

  • https://www.google.com/recaptcha/enterprise.jsreCAPTCHA · 0 API patterns
  • https://www.gstatic.com/recaptcha/releases/[redacted-id]/recaptcha__en.jsreCAPTCHA · 0 API patterns
Network and worker observations 64 requests
Captured scripts
5
Instrumented frames
2
Google Ads observed
Yes
Transmission evidence
Not validated

Legacy transmission hints are excluded. A request after an API call does not establish that the extracted value was sent.

Third-party hosts

  • assets.adobedtm.com
  • fonts.gstatic.com
  • img-embody.lb.wbmdstatic.com
  • img.lb.wbmdstatic.com
  • img.wbmdstatic.com
  • securepubads.g.doubleclick.net
  • www.google.com
  • www.gstatic.com
Other recorded API calls 1
  • document.cookie.read3 calls
Source record and integrity
Original source
results/headless/webmd-com-20261022T192455.json
Original file SHA-256
a172c510938c6294b5b34e154334fd519d9e1fb4da1aea034b94c43d5ee76517

Run ID: research-a172c510938c. The JSON contains sanitized observations, not the original private scan payload.

Other scan attempts (1)

Research setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-21T21:11:27.534396Z
Browser / scanner
156.0.8078.4 / 0.3
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headless/webmd-com-20261021T211127.json
Original file SHA-256
535ad747c674bcccc900c4a6e6c0ee4a65c6eba702dde1e91e8f65e821187b96

Run ID: research-535ad747c674. The JSON contains sanitized observations, not the original private scan payload.

Queries, request bodies, cookies, extracted values, raw errors, and session payloads are excluded before publication. The source digest identifies the original private record.

Read the sanitized JSON →