Focus Tab Locker
Stay focused by locking into one tab, with a safe countdown before returning.
Semi is a deterrent-focused testing environment where system-level kiosk mode is inaccessible or restricted.
Review user movement across collected snapshots.
View collected rating snapshots from the latest 7-day window to assess rating stability.
Compare 1-day, 7-day, and 30-day net growth and growth rate.
Review publication date, version, supported languages, and crawl timestamps.
Review the store description, core capabilities, and common use cases.
Semi is a lightweight, deterrent-focused testing environment designed for environments where system-level kiosk mode is inaccessible or restricted. It isolates a single testing tab into a dedicated, fullscreen popup window while programmatically terminating all other active browser distractions.
While it operates within the standard user-space (avoiding the instability of Incognito mode on managed devices), it provides a robust defense against common integrity breaches by disabling the context menu, blocking clipboard actions (Copy/Paste/Cut), and intercepting navigation shortcuts. It serves as a high-friction deterrent that creates a focused, single-purpose testing shell.
What it does:
Isolates: Closes all other tabs and windows to ensure the student is only on the assigned test.
Focuses: Launches the test in a fullscreen 'Popup' mode, removing the address bar and bookmarks.
Defends: Hard-blocks Right-Click and Ctrl+C/V to prevent the external sharing of test content.
Inspect the latest comments and rating distribution.
Store average score: --. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
Review related products from the Chrome Web Store detail page.
Stay focused by locking into one tab, with a safe countdown before returning.
Temporarily bypass CORS restrictions to streamline development and testing workflows.
Powerful extension designed to safeguard your browsing experience by blocking access to explicit or inappropriate content.
Temporarily unblock CORS for development and testing purposes
Highlights user-controlled reflections in DOM to help detect risky contexts. Run only on sites you own or may test.
Block distractions, set smart limits, and control impulsive browsing with focus tools designed to stop quick overrides and cheating.