FBS Voice Loader is a Chrome add-on designed specifically for the board simulator of "Sakura Furu Yoni Kettou wo," allowing users to insert custom voice lines into their gameplay experience. This tool is developed under the permission of Baka Fire Party, although it remains unofficial. Users should note that the voices played are non-official and provided by unofficial voice actors, enhancing the immersive quality of the game.

The add-on enables voice playback during key actions, such as basic moves and when specific cards are revealed. Users can customize their audio experience through a dedicated settings menu accessed via the extension icon, with all sounds initially turned off by default. Recent updates have progressively added support for various character voices and improved sound settings, ensuring a more tailored and engaging experience for players.