Skip to main content

Website evidence · pilot dataset

Does stackoverflow.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 9 source records are included in the JSON. 2 older runs have no recorded timestamp; missing provenance stays unknown. 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

Not observed

0 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Not observed
Measurement
Measured · Partial load
Page context
Page document
Scan time
2026-10-22T16:37:56.774186Z
Browser / scanner
156.0.8078.4 / 0.4

Captured titleNewest Questions - Stack Overflow

CanvasDraws text and reads canvas output.1 API entries

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

canvas.getContext1 calls

Frame: https://stackoverflow.com/questions

  • 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.2 API entries

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

navigator.platform1 calls

Frame: https://stackoverflow.com/questions

  • https://stackoverflow.com/Content/Js/stub.en.js
navigator.userAgent3 calls

Frame: https://stackoverflow.com/questions

  • https://stackoverflow.com/Content/Js/webpack-chunks/svelte.en.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 Tag Managerwww.googletagmanager.com
Network and worker observations 69 requests
Captured scripts
25
Instrumented frames
1
Google Ads observed
No
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

  • accounts.google.com
  • ajax.googleapis.com
  • cdn.cookielaw.org
  • graph.facebook.com
  • i.sstatic.net
  • lh3.googleusercontent.com
  • platform-lookaside.fbsbx.com
  • www.googletagmanager.com
  • www.gravatar.com
Source record and integrity
Original source
results/headful/stackoverflow-com-20261022T163756.json
Original file SHA-256
1f5bb83f52bda5240aaa250e6aea1c0bbd6d401e42130f6f833d57cac0749e4c

Run ID: headful-1f5bb83f52bd. The JSON contains sanitized observations, not the original private scan payload.

Other scan attempts (3)

Visitor setup

Signals observed

1 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Observed
Measurement
Measured
Page context
Page document
Scan time
Not recorded
Browser / scanner
Unknown browser / Unversioned

Captured titleNewest Questions - Stack Overflow

CanvasDraws text and reads canvas output.1 API entries

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

canvas.getContext1 calls
  • 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.7 API entries

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

navigator.doNotTrack2 calls
  • https://cdn.cookielaw.org/scripttemplates/202604.2.0/otBannerSdk.jsline 7 · col 504481
  • https://cdn.cookielaw.org/scripttemplates/202604.2.0/otBannerSdk.jsline 7 · col 504509
navigator.language2 calls
  • https://www.googletagmanager.com/gtag/js
navigator.platform1 calls
  • https://stackoverflow.com/Content/Js/stub.en.js
navigator.userAgent130 calls
  • https://accounts.google.com/gsi/clientline 59 · col 308
  • https://accounts.google.com/gsi/clientline 94 · col 291
  • https://stackoverflow.com/Content/Js/full-anon.en.js
  • https://stackoverflow.com/Content/Js/webpack-chunks/svelte.en.js
  • https://www.googletagmanager.com/gtag/js
screen.height2 calls
  • https://www.googletagmanager.com/gtag/js
screen.width2 calls
  • https://www.googletagmanager.com/gtag/js
window.devicePixelRatio1 calls
  • https://stackoverflow.com/Content/Js/full-anon.en.js
Providers, script signatures, and DNS 2 provider labels

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

  • Google Analyticswww.google-analytics.com
  • Google Tag Managerwww.googletagmanager.com
Network and worker observations 74 requests
Captured scripts
25
Instrumented frames
Not recorded
Google Ads observed
No
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

  • accounts.google.com
  • ajax.googleapis.com
  • cdn.cookielaw.org
  • geolocation.onetrust.com
  • google.com
  • i.sstatic.net
  • www.google-analytics.com
  • www.googletagmanager.com
  • www.gravatar.com
Other recorded API calls 2
  • document.cookie.read82 calls
  • document.cookie.write20 calls
Source record and integrity
Original source
results/headful/stackoverflow-com.json
Original file SHA-256
1a45504e41de98b7750a47b54d1c5f9e48281c55b223a3f4a7d6e29110a8fcc8

Run ID: headful-1a45504e41de. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Signals observed

1 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Observed
Measurement
Measured
Page context
Page document
Scan time
2026-10-19T06:13:22.663268Z
Browser / scanner
156.0.8078.4 / 0.3

Captured titleNewest Questions - Stack Overflow

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://cdn.cookielaw.org/scripttemplates/gpp.stub.jsline 85 · col 28398
canvas.getContext1 calls

Frame: https://stackoverflow.com/questions

  • 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.6 API entries

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

navigator.language2 calls

Frame: https://stackoverflow.com/questions

  • https://www.googletagmanager.com/gtag/js
navigator.platform1 calls

Frame: https://stackoverflow.com/questions

  • https://stackoverflow.com/Content/Js/stub.en.js
navigator.userAgent125 calls

Frame: https://stackoverflow.com/questions

  • https://accounts.google.com/gsi/clientline 59 · col 308
  • https://accounts.google.com/gsi/clientline 94 · col 291
  • https://stackoverflow.com/Content/Js/full-anon.en.js
  • https://stackoverflow.com/Content/Js/webpack-chunks/svelte.en.js
  • https://www.googletagmanager.com/gtag/js
screen.height2 calls

Frame: https://stackoverflow.com/questions

  • https://www.googletagmanager.com/gtag/js
screen.width2 calls

Frame: https://stackoverflow.com/questions

  • https://www.googletagmanager.com/gtag/js
window.devicePixelRatio1 calls

Frame: https://stackoverflow.com/questions

  • https://stackoverflow.com/Content/Js/full-anon.en.js
Providers, script signatures, and DNS 2 provider labels

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

  • Google Analyticswww.google-analytics.com
  • Google Tag Managerwww.googletagmanager.com
Network and worker observations 67 requests
Captured scripts
26
Instrumented frames
2
Google Ads observed
No
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

  • accounts.google.com
  • ajax.googleapis.com
  • cdn.cookielaw.org
  • geolocation.onetrust.com
  • google.com
  • i.sstatic.net
  • lh5.googleusercontent.com
  • www.google-analytics.com
  • www.googletagmanager.com
  • www.gravatar.com
Other recorded API calls 2
  • document.cookie.read33 calls
  • document.cookie.write2 calls
Source record and integrity
Original source
results/headful/stackoverflow-com-20261019T061322.json
Original file SHA-256
e93c523f44e382743a6c177cf5f9f2247e0c63ddc95577a2bcf4d3e1e0483d2b

Run ID: headful-e93c523f44e3. 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
2026-10-22T16:37:55.695718Z
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/stackoverflow-com-20261022T163755.json
Original file SHA-256
f461381659678e80b17ea6c86aacffe22a6d38c1922ea47c831d3b1d5237aee8

Run ID: headful-f46138165967. The JSON contains sanitized observations, not the original private scan payload.

Earlier measurement shown. Review the scan time and subsequent attempts below.

Research setup

Signals observed

1 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Observed
Measurement
Measured
Page context
Page document
Scan time
Not recorded
Browser / scanner
Unknown browser / Unversioned

Captured titleNewest Questions - Stack Overflow

CanvasDraws text and reads canvas output.1 API entries

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

canvas.getContext1 calls
  • 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.7 API entries

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

navigator.doNotTrack2 calls
  • https://cdn.cookielaw.org/scripttemplates/202604.2.0/otBannerSdk.jsline 7 · col 504481
  • https://cdn.cookielaw.org/scripttemplates/202604.2.0/otBannerSdk.jsline 7 · col 504509
navigator.language2 calls
  • https://www.googletagmanager.com/gtag/js
navigator.platform1 calls
  • https://stackoverflow.com/Content/Js/stub.en.js
navigator.userAgent129 calls
  • https://accounts.google.com/gsi/clientline 59 · col 308
  • https://accounts.google.com/gsi/clientline 94 · col 291
  • https://stackoverflow.com/Content/Js/full-anon.en.js
  • https://stackoverflow.com/Content/Js/webpack-chunks/svelte.en.js
  • https://www.googletagmanager.com/gtag/js
screen.height2 calls
  • https://www.googletagmanager.com/gtag/js
screen.width2 calls
  • https://www.googletagmanager.com/gtag/js
window.devicePixelRatio1 calls
  • https://stackoverflow.com/Content/Js/full-anon.en.js
Providers, script signatures, and DNS 2 provider labels

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

  • Google Analyticswww.google-analytics.com
  • Google Tag Managerwww.googletagmanager.com
Network and worker observations 72 requests
Captured scripts
0
Instrumented frames
Not recorded
Google Ads observed
No
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

  • accounts.google.com
  • ajax.googleapis.com
  • cdn.cookielaw.org
  • geolocation.onetrust.com
  • google.com
  • i.sstatic.net
  • lh3.googleusercontent.com
  • www.google-analytics.com
  • www.googletagmanager.com
  • www.gravatar.com
Other recorded API calls 2
  • document.cookie.read82 calls
  • document.cookie.write20 calls
Source record and integrity
Original source
results/headless/stackoverflow-com.json
Original file SHA-256
6418b20f5876afaf8f6a22f075300e64b8df00b95b7a81384c08e94d32aa031f

The research mode is inferred from the archive folder because this legacy record has no mode field.

Run ID: research-6418b20f5876. The JSON contains sanitized observations, not the original private scan payload.

Other scan attempts (4)

Research setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-19T05:56:28.872207Z
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/stackoverflow-com-20261019T055628.json
Original file SHA-256
d52bc6c00317690698795cdfd755f6f68f7fecd30d8ff20ef57bf12fed709177

Run ID: research-d52bc6c00317. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-22T19:01:28.157682Z
Browser / scanner
156.0.8078.4 / 0.4
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/stackoverflow-com-20261022T190128.json
Original file SHA-256
b35e6988a88b97a359d452ead638e3f34d280441b75f6d03f358f11531a07616

Run ID: research-b35e6988a88b. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Scanner error

Scanner error

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Scanner error
Page context
Page not measured
Scan time
2026-10-23T00:02:06.757328Z
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/headless/stackoverflow-com-20261023T000206.json
Original file SHA-256
ba3452fa26ffee746c596c39a44ce5beefd69eaf3026d56bb992a7292429937f

Run ID: research-ba3452fa26ff. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-23T00:02:07.052371Z
Browser / scanner
156.0.8078.4 / 0.4
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/stackoverflow-com-20261023T000207.json
Original file SHA-256
fe7622165e7f2c5c8e499bcd24e8e58643e6e55fe6a3eb5e77baf4d236103336

Run ID: research-fe7622165e7f. 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 →