CF Round Filter is a free Chrome add-on designed to enhance the user experience on Codeforces by allowing users to easily filter programming contests by division. Users can sort rounds into categories such as Div 1, Div 2, Educational, and Others, streamlining the process of finding relevant contests based on their skill level and preferences. This functionality is particularly beneficial for competitive programmers who wish to focus on specific types of problems and contests.

The add-on integrates seamlessly into the Codeforces problemset page, enabling quick access to filtering options without navigating away from the main interface. By simplifying the process of locating contests, CF Round Filter saves time and enhances productivity for users, making it a valuable tool for anyone involved in competitive programming.