A retailer notices that the Account Addresses page is showing the wrong shopper’s address.

To diagnose an issue where the Account Addresses page is showing the wrong shopper's address, the best tool to start with is the C. Storefront Toolkit. This tool allows developers to inspect the storefront's behavior in real-time, providing insights into the rendered content, application state, and session data, which can help identify issues related to shopper context mismanagement or session data errors. It offers a direct view into how data is being presented to the user, making it a first-line tool for diagnosing user-facing issues.