No build process: the submitted zip contains the plain, unminified source (no bundler, no transpiler, no third-party libraries).

Permissions:
- storage: saves the password hash (PBKDF2) and settings locally
- tabs: redirects open tabs to the lock screen while locked and restores them on unlock
- idle: optional auto-lock after inactivity

To test: install, set a master password on the settings page that opens automatically, then press Alt+L (or click the toolbar icon). Tabs switch to the lock screen; entering the password restores them. The extension makes no network requests and collects no data.