Timekeeper for Minesweeper Online is a Chrome add-on developed by nagao. This free program provides audio updates for Arena and Endurance progress on Minesweeper Online. With this add-on, there is no need to visually check your progress, allowing you to fully focus on playing.

To use Timekeeper for Minesweeper Online, simply install the extension and reload the Minesweeper Online website if it is already open. Then, click the extension icon and select the game mode you want to play. Click "Start" to begin keeping track of your selected game mode.

For customization options, you can click the mark in the lower right corner to change voice settings. When you are finished playing, click the extension icon and click "Stop" to end the timekeeping.

Overall, Timekeeper for Minesweeper Online is a handy tool for players who want to keep track of their progress without the need for visual checks. It enhances the gaming experience by providing audio updates, allowing users to fully immerse themselves in the game.