Vellum — Quiet Privacy & Ad Shield

Calm browser privacy sanctuary. Masks unique hardware fingerprints and quietly blocks ads, trackers, and unsafe websites.

Vellum is a calm, human-first browser privacy sanctuary designed to keep your everyday web browsing quiet, clean, and untrackable. Modern websites and analytics networks go far beyond cookies: they silently inspect your graphics card (WebGL), 2D HTML5 Canvas rendering, WebAudio DSP signal buffers, system fonts, screen sub-pixels, and timezone offsets to construct a permanent hardware fingerprint that follows you across the web. Vellum combines deterministic, per-site fingerprint masking with a fast Manifest V3 ad, tracker, and badware shield—wrapped in a warm, distraction-free interface. ✦ SIMPLE BY DEFAULT FOR EVERYDAY BROWSING • Single-Toggle Protection ("Enhance Security and Block Ads"): Block intrusive ads, analytics beacons, tracking URL parameters (utm_*, fbclid, gclid), and known phishing/malware domains with one switch. • Active Browsing Disguise: Blends your browser into everyday crowd traffic using coherent desktop hardware personas and per-domain cryptographic isolation—shuffle your disguise with a single click. • Instant Per-Site Control: Pause or whitelist trusted websites in one click directly from the toolbar popup. • Compatibility First: Automatically preserves interactive security challenges (including Cloudflare Turnstile, Google reCAPTCHA, and hCaptcha) and video player controls without page-breaking overlays. ✦ ADVANCED & NERD CONTROLS (EXPANDABLE DRAWER) For developers, researchers, and privacy enthusiasts, expand the "Advanced & Nerd Controls" drawer to customize: • 5 Coherent Hardware Identity Profiles (Windows 11 Desktop, Windows Ultrabook, macOS Apple Silicon, macOS Air, Ubuntu Linux Workstation) • Deterministic Seed Isolation Modes (Per-Domain eTLD+1, Global Session, or Per-Load Aggressive) • Masking Noise Calibration (Subtle 1-ULP, Standard Edge-Only, or Aggressive) • Timezone & Solstice DST Alignment across 12 global regions • Granular toggles for all 14 Anti-Fingerprinting Vectors (2D Canvas, WebAudio DSP, WebGL 1/2, Timezone/Intl, Navigator/UA-CH, Screen/DPR, OS Fonts, DOMRect Sub-Pixel, WebRTC IP Scrub, MediaDevice IDs, SpeechSynthesis Voices, Math ULP, Iframe/Worker Parity, HTTP Client Hint Headers) • Built-in Privacy & Fingerprint Verification Lab: Inspect your live browser entropy hashes and run a 12-point prototype integrity and 8-point security shield self-test locally in your browser. ✦ 100% LOCAL & ZERO TELEMETRY • Zero servers, zero accounts, zero analytics, and zero data collection. • All fingerprint masking, rule matching, and preferences run 100% locally on your device using Chrome's native storage and DeclarativeNetRequest APIs. ⸻ DISCLAIMER & RESPONSIBLE USE Vellum is a defensive user-privacy and tracker-blocking tool designed to protect personal browsing privacy against cross-site tracking, malvertising, and phishing. Vellum does not collect, transmit, or sell any user data. Some websites that rely on strict hardware-bound authentication or third-party advertising scripts may behave differently when fingerprint masking is active; you can pause protection on any trusted site with one click using the "Protected / Whitelisted" button in the popup.