Works by starting a timer every time user navigates to watchlist site (can be configured with CONF button at top right corner). All watchlist sites are blocked when the timer is depleted. Details: •Timer recharges at a rate of approx. 1/10 real time when watchlist sites are not open e.g. 30min away from a watchlist site adds 3min to the timer •Timer caps at 45min •Staying away from watchlist sites for 4h resets the timer to 45min completely (saves about 3.5h of being watchlist-free to go from timer count of 0min to 45min) •CONF button at top right can be used to set watchlist sites NOTE: it is recommended that you include only the domain name in your watchlist. Setting "wikipedia.org/Cats" rather than "wikipedia.org" as a watchlist site will make Drill Sergeant ignore any other sites on Wikipedia that don't have "wikipedia.org/Cats" contained in their URL.