Founded and published a Chrome Web Store extension (Manifest V3) that strips YouTube distractions using zero-lag, pure CSS injection — shipped through versioned releases (v1.0.4) with CWS compliance and a privacy policy. Produced a state-driven Productivity Dashboard featuring a custom Pomodoro timer and contextual task manager. Forged a robust MutationObserver engine for surgical, zero-reload DOM manipulation across SPA navigations.