Chrome extension (Manifest V3) that prevents websites from detecting tab switches, page visibility changes, and user inactivity — blocks Page Visibility API, blur/focus events, hasFocus(), rAF timing, IntersectionObserver, Web Audio API, and Idle Detection API.
Intercepts all JS-based tab-switch detection before the page loads. Page Visibility API, blur/focus events, hasFocus(), and more.
Developer tools for building multi-tab aware applications
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