KanColle Alert Dialog is a free Chrome add-on developed by dev.lycoris. This add-on provides a useful feature for players of the popular online game KanColle.

With KanColle Alert Dialog, players are prompted with a confirmation dialog when they attempt to close the game's page. This prevents accidental closure of the page, ensuring that players don't lose their progress or miss out on important in-game events. The dialog gives players the option to confirm or cancel the closure, allowing them to make a deliberate decision.

This add-on is a valuable tool for KanColle players who want to avoid the frustration of accidentally closing the game's page and losing their progress. It provides a simple yet effective solution to prevent such mishaps and ensures a smoother gaming experience.