Library Extension is a Firefox add-on designed to enhance your browsing experience by providing instant availability information for books, music, and audiobooks from public libraries. This subscription-based tool connects users to over 5,000 libraries worldwide, allowing for seamless integration of library resources into online shopping and browsing activities. Users can easily check if items are available at their local library without having to leave the site they are currently on.

The extension is particularly useful for avid readers and library patrons, as it brings library services directly to the user’s fingertips. By simply browsing various retail or information sites, users receive real-time updates on the availability of their desired media, making it easier than ever to access public library offerings. The tool supports a wide range of libraries and aims to continually expand its network to include more locations.