The ProtonDB Community Extension is an innovative tool designed for Firefox users that significantly improves the gaming experience on Linux. By integrating ProtonDB's compatibility data directly into Steam's interface, it allows users to easily access vital information about game compatibility. The extension features a seamless integration with Steam, showcasing tier highlights and deck verification status, making it easier for users to decide which Windows games to play on their Linux systems.

In addition to its core features, the extension offers customizable line colors and dynamic line addition, enhancing the visual aspect of the Steam interface. Users can view compatibility tiers directly in search results and on app pages, streamlining the process of finding compatible games. This extension also maintains compatibility with other Steam extensions, making it a versatile addition to any Linux gamer's toolkit.