Navigation Confirmation is a free Chrome add-on developed by Daniel Herr. This add-on provides a simple and convenient way to confirm your actions when navigating to another page or reloading the current one. By clicking on the icon, a popup will appear, allowing you to choose whether you want to confirm the action or not. The check mark indicates that you will be asked for confirmation on the current tab, while the red x indicates that you will not be prompted to confirm leaving the page. Additionally, there is an option to enable confirmation when closing the window. With Navigation Confirmation, you can have better control over your browsing experience and avoid accidental actions.