ProtonDB for Steam is a Chrome add-on developed by Software Fusion that adds ProtonDB ratings to games in the Steam store. This allows users to have an idea of how well a game will run on their Linux system before making a purchase.

With ProtonDB for Steam, users can easily see the Proton rating for each game, if available. This rating provides valuable information about the game's compatibility with Linux. Additionally, the add-on also indicates if a game has a native Linux version, giving users more options to choose from.

One of the highlights of this add-on is its open-source nature. The project is available on GitHub and credits go to MostwantedRBX for founding it. The recent versionbrings improvements such as better visibility for colorblind users, badges in search bar results, and bug fixes.

In the near future, ProtonDB for Steam plans to introduce features like adjustable badge colors, the ability to enable or disable badges in specific locations, customizations, and badges on the front page. These additions will further enhance the user experience and provide even more information for informed game purchases.