AI Overlay for Mercer Mettl Secure Browser on Mac

Mercer | Mettl is the standalone assessment platform Pearson acquired in 2018. It powers a large share of corporate hiring tests and L&D certifications, especially across India, the Middle East, and Southeast Asia, delivered through the Mercer Mettl Secure Browser plus the Mettl Auto Proctor AI layer.

Mercer | Mettl ships two stacked products: the Mercer Mettl Secure Browser, a Chromium-based lockdown wrapper that disables tab switching, copy/paste, screen-sharing tools, external ports, and printing; and the Mettl Auto Proctor, an AI layer that adds webcam-based facial recognition, audio analysis, and continuous window-violation detection. Neither product runs at kernel level on macOS; the Secure Browser is a notarized user-space Chromium fork, and Auto Proctor is a WebRTC pipeline that captures via getDisplayMedia. Both surfaces are bound by the same compositor rule: macOS will not include a window in screen-capture output if that window has been flagged with kCGSWindowSharingNone. Fracture sets that flag at window creation, so even when the Secure Browser kills Cmd-Tab and the Auto Proctor live-streams to a reviewer, the overlay window is simply not in the frames either of them get.

No. Mettl lockdown blocks tab-switching, copy/paste, and screen-sharing apps it can name. Fracture uses a randomized innocuous bundle ID per build and never tries to share screen content.

No. The detector listens for focus loss in the browser tab. Fracture overlay does not take focus when toggled, so the Mettl tab keeps focus.

Mettl checks for VMs through browser fingerprinting and timing heuristics. Fracture runs on bare-metal macOS and does not introduce any VM signal.

Yes, almost certainly. Mettl is used for high-stakes hiring decisions and AI assistance is treated as fraud by virtually every employer that runs Mettl tests.

Yes. The Brightspace integration is just an LTI handoff; the actual exam delivery still runs through Mettl Secure Browser or Auto Proctor on Mac.