Persistent memory refers to a technology or feature that allows data to be stored and retained even after a device is powered off or a session ends. In software applications, such as AI browsers, persistent memory enables the system to remember user preferences, history, or instructions across multiple sessions, improving convenience and user experience. However, this capability can also pose security risks, as it may preserve malicious code or unauthorized instructions that persist beyond a single use. Understanding persistent memory is important for both optimizing usability and maintaining cybersecurity.