Contester is a Chrome extension designed to enhance the experience of competitive programmers using the Codeforces platform. It provides several features that streamline the process of solving and submitting problems. Key functionalities include quick code submission via keyboard shortcuts, a problem viewer for easy navigation between tasks, and a ranking display that allows users to track their performance without needing to access the results table.

Additional features of Contester include a profile colorizer that visually indicates user rankings and an auto-update function for offline pages. The extension is customizable through a pop-up menu, enabling users to tailor the tool to their preferences. Currently, Contester is under active development, with opportunities for community feedback to improve and expand its capabilities.