AnchorTab: Focus Assist by Ferdinand B. Alexander

AnchorTab (formerly SpotMe) is a productivity extension that helps you stay focused while browsing. Set a countdown timer for your current tab or tab group, and AnchorTab will gently guide you back if you try to leave before your session ends. With a modern, easy-to-use interface and automatic reminders, AnchorTab is perfect for deep work, study sessions, or anyone who wants to minimize distractions and maintain concentration online.