Fastmail Enhanced is a free Chrome extension designed to improve the usability and visual appeal of the Fastmail email platform. It introduces several features that significantly enhance the email management experience. Users can benefit from visual indicators like avatars in the email list, a date grouping feature, and improved separation of reply cards, making it easier to navigate through emails.

The extension also addresses aesthetic issues by fixing improper margins in plain text emails and allowing users to customize their experience with accent colors for unread messages. Recent updates have introduced support for beta domains, customizable avatar sizes, and an improved options button for easier settings management. Overall, Fastmail Enhanced aims to create a more comfortable and organized email environment.