webaudio

webaudio fingerprinting on alibabaritter.vg

Firefox made WebAudio output deterministic in v118, collapsing most variance to three CPU‑dependent buckets (x86 without FMA, x86/x64 with FMA, ARM NEON). Telemetry shows 99.24% of users fall into these buckets; a long tail of 23 distinct values affects <0.1% of users. Ongoing bugs aim to merge the remaining buckets. Alibaba’s fingerprint script was extracted (two SHA‑256 hashes) and shown to be…