AI 产品解读LockDown Browser for Chromebook - a custom browser extension that locks down the exam environment within learning and assessment systems to prevent cheating
Prevents academic dishonesty during online exams by restricting browser functionality (screenshots, tab switching, keyboard shortcuts, copy/paste, developer tools, secondary displays) and optionally monitoring students via webcam
1) Student installs extension. 2) Student navigates to exam URL in their LMS (Canvas, Moodle, Blackboard, etc.) while logged into the LMS. 3) Extension auto-detects the exam URL and reloads the page in lockdown mode. 4) Browser enters fullscreen, disables keyboard shortcuts, blocks non-exam URLs, manages extensions. 5) Student takes exam with restricted browser. 6) On exam completion or early exit, extension cleans up (restores cookies, history, normal state).
Automatic exam environment lockdown triggered by LMS exam URL detectionAnti-cheat protections: blocks screenshots, right-click, Ctrl+Shift/Alt, tab switching, copy/paste, developer toolsFullscreen enforcement and window focus managementURL blocking for non-exam linksExtension management (disables other extensions during exams)Secondary display detection
- 目标用户
- Students on Chromebook devices taking proctored online exams / Educational institutions using LMS platforms for assessments
- Source code is heavily minified (all JS files are single-line webpack bundles), making it difficult to trace exact logic flows
- The NOT_LICENSED license check and PayPal references in monitor.js could not be fully disambiguated due to minification - unclear if they gate core functionality or only webcam proctoring
- Cannot determine from source alone whether the extension is distributed free to all students or requires institutional licensing to function
