AliExpress runs silent WebAudio fingerprinting that breaks Bluetooth multipoint

AliExpress’s homepage creates two hidden Web Audio API contexts via collina.js and fireyejs.js, each routing a silent sawtooth oscillator through an analyser and a zero-gain node to the system audio destination. This continuous processing keeps the Bluetooth audio path active, stopping multipoint headphones from switching to a phone until the tab is closed. The scripts are part of Alibaba’s anti-abuse system and serve as a fingerprinting method that bypasses standard media-element mute controls.