Detection approach
Visited link timing check failed. The browser failed to show any visited history for extremely common domains (google.com, youtube.com, facebook.com). The timing of style computation around these common elements is perfectly uniform. Real consumer profiles have visited at least one of these.
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
Users on clean virtual devices or very strict privacy setups that completely clear visited links layout styles.
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