Do Not Distracted – Focus OS is a Chrome extension that helps you take control of your browsing environment. Create Focus Modes, allow only the websites you need, block distracting sites and keywords, schedule focus sessions, and use Focus Lock for uninterrupted work. Track your focus time, goals, sessions, streaks, and website usage to understand your productivity habits and stay focused on what matters.

It locks all the website only user selected website be unlock so user can focus on work. In today's time online study was started so you can use it for your children they only use the learning website any other distracting thing they can't open.