Purj — Privacy Intelligence

Tracking since Apr 14, 2026.

Changelog

• May 4, 2026
  description

  Purj is a privacy intelligence extension that reveals hidden third-party tracking on every website you visit.
  
  FREE TIER — Privacy Intelligence:
  - Real-time tracker detection with confidence model (observed / likely / inferred)
  - Data broker identification (25+ brokers by name and category)
  - Cookie sync chain tracing between ad-tech companies
  - Live interactive network graph (zoom, pan, click to explore)
  - Fingerprinting detection (canvas, WebGL, audio, navigator)
  - CNAME cloaking detection (heuristic)
  - Simple letter-grade view and full detailed analysis
  - Privacy report export (Markdown) and event log export (CSV)
  - Fingerprint resistance (canvas noise, WebGL spoofing, audio randomization, navigator normalization, battery blocking, WebRTC IP leak prevention)
  - URL tracking parameter stripping (52+ params including fbclid, gclid, utm_*)
  - Google and Facebook click-tracking redirect unwrapping
  
  PRO TIER — Active Protection (beta, by invitation):
  - 150K blocking rules from 15 open-source lists (EasyPrivacy, AdGuard, HaGeZi, and others)
  - Learning algorithm — auto-classifies and blocks trackers seen on 3+ sites
  - Privacy Cleanup Wizard — draft deletion requests across 7 privacy-law jurisdictions (CCPA, GDPR, UK GDPR, LGPD, VCDPA, CPA, CTDPA)
  - Compliance tracker with deadlines and escalation emails
  - GPC (Sec-GPC: 1) and DNT opt-out headers on every request
  - Cookie and storage cleanup per site
  - Clean on Leave — auto-scrub tracking cookies on navigation
  - Consent auto-rejection
  - Protection modes: Quiet (observe), Balanced (block + learn), Aggressive (block + clean)
  - Site breakage recovery
  
  100% client-side. Zero analytics. Zero telemetry. Your data never leaves your browser.

  Every webpage you load contacts dozens of companies you've never heard of. They sell your activity, sync your IDs across browsers, fingerprint your hardware, and adjust prices based on what they know about you.
  
  Purj shows you exactly who's watching — in real time, on every page, with names, categories, and confidence ratings. Then helps you make them stop.
  
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  FREE — PRIVACY INTELLIGENCE
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  Real-time tracker detection with named confidence ratings (Observed / Likely / Inferred), so you know exactly how each finding was made.
  
  - Data broker identification — 30+ companies named by category (LiveRamp, Tapad, TransUnion, Lotame, The Trade Desk, and more)
  - Cookie sync chain tracing — see IDs pass between ad-tech companies in multi-hop chains
  - Live network topology graph — interactive zoom and pan to explore third-party connections
  - Fingerprinting detection across canvas, WebGL, audio, and navigator APIs
  - CNAME cloaking detection — catches first-party subdomains that secretly alias to third-party trackers
  - Server-to-server inference (Meta CAPI, server-side GTM, identity resolution)
  - Privacy report export to Markdown + event log export to CSV
  - Letter-grade simple view — toggle between forensic detail and "show me the headline"
  
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  PRO — ACTIVE PROTECTION
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  150,000 blocking rules from 15 open-source filter lists (EasyPrivacy, AdGuard, HaGeZi, and others), enforced via Chrome's modern declarativeNetRequest engine.
  
  - 7 fingerprint countermeasures — canvas noise, WebGL spoofing, audio randomization, navigator normalization, screen normalization, battery blocking, WebRTC IP leak prevention
  - Price Guard — auto-defends against surveillance pricing on 90+ travel, hotel, car-rental, e-commerce, and insurance sites. Strips competitor cookies, fuzzes geolocation to 50km, removes comparison-shopping URL params
  - Privacy Cleanup Wizard — drafts deletion requests across 7 jurisdictions (CCPA, GDPR, UK GDPR, LGPD, VCDPA, CPA, CTDPA) with built-in compliance deadline tracking
  - 55 URL tracking parameters stripped before pages load (fbclid, gclid, utm_*, msclkid, mc_cid, and more)
  - Google + Facebook redirect unwrapping — kills click-tracking interstitials
  - Auto consent rejection on 6 major CMP platforms (TCF, OneTrust, Cookiebot, Didomi, Usercentrics, Google Consent Mode)
  - Consent violation detection — monitors trackers that fire after you said "Reject All" and flags them
  - Supercookie deep clean across 7 storage vectors (cookies, localStorage, sessionStorage, IndexedDB, Cache, Service Workers, WebSQL)
  - GPC (Sec-GPC) and DNT opt-out headers sent on every request
  - Clean on Leave — auto-scrub tracking cookies as you navigate away
  - Three protection modes — Quiet (observe-only), Balanced (block + learn), Aggressive (block + clean)
  - Learning algorithm — auto-classifies and blocks trackers seen on 3+ sites
  - Per-site safelist for sites that need RUM/tag-manager scripts to render
  
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  PRIVACY POSTURE
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  100% client-side analysis. No telemetry. No analytics. Your browsing data never leaves your browser.
  
  The only thing Purj transmits externally is your license key, sent to api.purj.ai approximately once a day to confirm Pro is active. Nothing else. Not your URLs, not your trackers list, not your scan results, not which sites you visit.
  
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  Privacy intelligence for people who want to actually see what's happening — not just trust that something somewhere is blocking something.
  
  purj.ai

• May 4, 2026
  short_description

  See where your data goes. Tracker detection, data broker ID, cookie sync tracing, fingerprint resistance, and privacy remediation.

  See where your data goes — detect trackers, data brokers, cookie syncs, and fingerprinting. Block them with Pro.

Permissions & access

Permissions

webRequeststoragescriptingcookiesdeclarativeNetRequestwebNavigationtabs

Host access

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Screenshots