Navigator Fingerprinting

The navigator collector reads browser and device metadata exposed through the navigator object. While many of these values are commonly spoofed, they're useful for cross-referencing with other signals.

Collected signals

Signal	Example	Notes
userAgent	Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7)...	Full UA string
platform	MacIntel	OS platform
language	en-US	Primary language
languages	['en-US', 'en', 'pl']	All preferred languages
hardwareConcurrency	10	CPU logical cores
maxTouchPoints	0	Touch capability
cookieEnabled	true	Cookie support
doNotTrack	1 or null	DNT setting
deviceMemory	8	RAM in GB (Chrome only)
pdfViewerEnabled	true	Built-in PDF viewer
webdriver	false	Automation flag
vendor	Google Inc.	Browser vendor

Entropy and stability

Property	Value
Entropy	~8 bits
Stability	0.75
Typical duration	<1ms

Cross-browser considerations

hardwareConcurrency and deviceMemory are excluded from crossBrowserId:

• Safari caps hardwareConcurrency at 8 even on 10+ core machines
• Safari doesn't expose deviceMemory at all

languages is trimmed to 1 entry in Chrome incognito, making it a signal for incognito detection.

Role in spoofing detection

Navigator values are cross-referenced with other signals:

• platform says Mac but userAgent says Windows = spoofing
• webdriver: true = automation framework
• hardwareConcurrency: 16 with deviceMemory: 2 = inconsistent

Usage

const fp = await neoprint.get({ collectors: ['navigator'] })
const nav = fp.components.navigator.value

console.log(nav.platform)              // MacIntel
console.log(nav.hardwareConcurrency)   // 10
console.log(nav.languages)            // ['en-US', 'pl']