The Cursor Trap
Modern web browsers support an advanced API called “Pointer Lock.” This feature allows a specific webpage to hide your mouse cursor and capture all physical mouse movements directly, essentially locking your cursor inside the browser window. While this is an incredible feature for browser-based first-person shooter games or 3D modeling web apps, it can be terrifying if you stumble onto a malicious website. Suddenly, your cursor disappears, you cannot click on other tabs, and you cannot move your mouse to the standard close button. You are effectively trapped within that single webpage.
How to Escape a Mouse Trap
If you currently find yourself on a webpage that has captured your mouse without your permission, do not panic. The browser has a built-in hardware override.
Simply press the Esc (Escape) key on your keyboard. This is a hard-coded shortcut in Google Chrome that instantly revokes the Pointer Lock API permission for the active tab, freeing your cursor and allowing you to close the offending website.
How to Disable Pointer Lock Globally
If you don’t play browser games and never want any website to have the ability to lock your mouse cursor, you can permanently disable this permission in Chrome’s site settings.
1. Open Google Chrome and click the three vertical dots in the top-right corner.
2. Select Settings.
3. In the left-hand navigation sidebar, click on Privacy and security.
4. In the main pane, click on Site settings.
5. Scroll down to the bottom and click on Additional permissions to expand the list.
6. Look for the setting labelled Pointer lock (or “Mouse cursor lock”).
7. Click the radio button next to Don’t allow sites to lock your pointer.
With this setting applied, Chrome will automatically reject all requests from websites attempting to capture your mouse movements. You will never have to worry about losing control of your cursor again.