Geometry Delta

Detection approach

Window geometry mismatch: outerWidth minus innerWidth is exactly 0, indicating a headless browser window lacking physical frame/chrome (toolbar, address bar, scrollbar margins).

How this helps detect bots

This signal is assessed with other independent session, browser, and network evidence. A single anomaly is a lead, not a verdict; corroborating anomalies make automated traffic more likely.

Legitimate traffic to consider

Legitimate users running custom borderless screen extensions or custom browser configurations.