All Tabs Helper is a Firefox addon designed for users who manage a large number of tabs. This tool offers a list-style interface for easy tab organization and navigation. Users can access the ATH UI from the toolbar button, sidebar, or a full view management window, which provides four distinct views: 'all', 'recent', 'dups', and 'search'. Each view allows for efficient tab management, including filtering by title or URL, listing recently accessed tabs, and identifying duplicate tabs based on identical URLs.

The addon includes multi-window functionality, although it is currently in an experimental phase. Users should be aware that duplicate tabs may not always represent the same content due to variations in page generation. All Tabs Helper requires specific permissions to access browser data and settings, ensuring it can effectively manage and search through open tabs without compromising user privacy.