Building Zscaler Likejacking Prevention For Different Browsers

**Executive summary:** This document is a technical post about the 'Facebook Likejacking Prevention' browser extension (v1.0.8) and the cross‑platform challenges of implementing detection and mitigation of hidden Facebook iframes; it covers extension architecture, nested frame inspection, late-loaded widgets, inter-script messaging and storage differences, and UI constraints across Chrome, Safari and Firefox, concluding Safari posed the greatest implementation difficulty while Firefox offered the easiest DOM access and Chrome the best UI capabilities.