Duplicate Tab Blocker is a free Chrome add-on designed to enhance browsing efficiency by preventing the opening of multiple tabs with the same URL. This tool helps users maintain a cleaner and more organized browsing experience by blocking duplicate tabs, which can often lead to confusion and clutter.

The primary feature of Duplicate Tab Blocker is its ability to automatically detect and stop the opening of duplicate URLs. This functionality is particularly useful for users who frequently navigate between various web pages and want to avoid the hassle of managing multiple instances of the same site. Overall, it serves as a practical solution for streamlining web browsing activities.