Detection approach
Empty Text-to-Speech voices array: speechSynthesis.getVoices() returned 0 voices on desktop, proving the absence of OS-level speech synthesis voice packages common on Linux/Docker scraping servers.
How this helps detect bots
Collect this signal alongside session context, request metadata, and other independent indicators. A single anomaly is a lead, not a verdict; corroborating anomalies make automated traffic more likely.
Legitimate traffic to consider
Legitimate users browsing on Linux platforms that lack any installed system text-to-speech voice packs.
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