Brave Blocks AliExpress Audio Fingerprinting Script
A major browser blocking a script by default shows a concrete response to covert device tracking, while the silence from AliExpress leaves the claim unanswered.
Reporting from 1 source: ASCII.jp.
On August 23, Brave's official X account claimed AliExpress embedded a script that plays an inaudible audio file to measure device differences, building a fingerprint without cookies. Brave said it would block the script by default. As of August 25, AliExpress has not made an official statement.
The discovery began when a user noticed that opening AliExpress on a PC caused Bluetooth headphone audio to stop. The cause traced to a silent audio file the site played, exploiting the way PCs prioritize active audio sources.
Brave said the script measured slight processing differences across CPUs and browsers to identify individual devices, a technique that works without cookies. The browser announced it would block the script with protection enabled by default and no user settings changes required.
As of August 25, AliExpress and its parent Alibaba have not issued an official response to the claims.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.
Sources
- ASCII.jp AliExpress、デジタル“指紋”でユーザー追跡か