Brave Browser Claims Alibaba’s AliExpress Caught Tracking Users With Hidden Audio Fingerprinting
AI-summarised brief · reviewed before publication
Alibaba-owned AliExpress was discovered running hidden Web Audio API scripts on its homepage that emitted a silent tone to analyze how devices processed the sound, a technique used for browser fingerprinting. The method, part of the site’s anti‑fraud and security tools, created audio processing graphs that connected to the system audio output at zero volume, avoiding detection by mute controls. Brave browser reported the practice after a user noticed interference with Bluetooth headphones and stated its default protections block such tracking. The incident highlights a covert data‑collection method that bypasses traditional cookie‑based tracking.
💡 Why It Matters
- · The revelation exposes a subtle, hardware‑based tracking vector that can evade conventional privacy safeguards, underscoring the need for browsers to monitor and restrict low‑level audio APIs.