The Slack Desktop Notifications Visibility Helper is a Chrome extension that allows users to configure the visibility mode for Slack Desktop Notifications on Windows. By default, these notifications are only visible for a short period of time and there is no visual indicator for unread messages. With this extension, users can choose to use sticky notifications that remain visible until closed or read, or they can stick with the default behavior. This extension is particularly useful since the Windows app released by Slack does not always trigger notifications properly and does not have sticky notifications.