Data URI Alert is a free Chrome extension developed by Scott Pritchard. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This extension is designed to protect users from navigating to data URI addresses that can be exploited during phishing attempts.

Phishing attempts are a common method used by attackers to trick users into revealing sensitive information such as passwords or credit card details. Data URI addresses can be used as an attack vector in these phishing attempts. However, with Data URI Alert, users are alerted when they are directed to such URLs, giving them a chance to navigate away or close the tab.

With its simple and straightforward functionality, Data URI Alert provides an extra layer of security for Chrome users. By preventing unintentional navigation to potentially dangerous data URI addresses, this extension helps to safeguard against phishing attacks.