Block keys are an extension that blocks certain shortcuts necessary for a kiosk mode to function efficiently without any strange behavior. The extension offers two modes for blocking keys: keydown and commands.

In the keydown mode, the extension blocks a variety of shortcuts including simple keys like F1, F3, F5, and F7, as well as combinations with Ctrl, Alt, and Shift keys. These blocked shortcuts ensure that the kiosk mode remains uninterrupted and prevents users from accessing certain functions or actions.

In the commands mode, additional shortcuts can be blocked as agreed upon in the [chrome://extensions/shortcuts] panel. This allows for further customization and control over the shortcuts that are blocked.

By using Block keys to kiosk mode, users can ensure that their kiosk mode remains secure and protected from any unwanted interactions or disruptions caused by users trying to access restricted functions or actions.