Popup Blocker Bypass

Detection approach

A hidden iframe attempted an automatic window.open() without a human click. Normal browser pop-up blockers silently suppressed it. However, this session opened the pop-up and returned the challenge hash, confirming the browser is running with --disable-popup-blocking — a flag used almost exclusively by headless automation frameworks.

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

Users with popup blockers disabled globally or using developer extension configurations.