Historia is a Firefox extension designed to enhance user privacy by effectively managing browsing history. It offers features like filtering and deleting unwanted history items, as well as clearing host history and cookies, which contribute to a more streamlined browsing experience. The extension operates as a multi-process tool, ensuring that it does not compromise browser performance while maintaining a slimmer history database.

Key functionalities include the ability to use patterns and regular expressions for filtering, searching and deleting history items based on keywords or dates, and auto-deleting history older than a specified number of days. Users can manage host history and cookies directly from the toolbar, and the extension allows for importing and exporting preferences for easy customization. Future updates may include additional options for managing download history.