Codeforces Rating-Based Heatmap is a Firefox extension that replaces the standard Codeforces activity heatmap with colors based on the highest-rated problem solved each day. It provides hover tooltips with problem details and links, and supports multi-year activity analysis for competitive programmers.
In the Browser DevTools & extensions space, Codeforces Rating-Based Heatmap takes a focused approach. It focuses on understanding competitive programming progress by problem difficulty and date. Codeforces Rating-Based Heatmap is a consumer product aimed at codeforces users and competitive programmers. Codeforces Rating-Based Heatmap costs nothing to use. Codeforces Rating-Based Heatmap is available on the web and embeddable surfaces.
It is developed by Gopikrishna, and it first shipped in 2025. Among its 5 catalogued features are rating heatmap, difficulty-based colors, and problem tooltips. The interface is available in 32 languages, including Czech, German, and Greek.
Summary written by a language model from the project’s public pages.
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