The Library Multi-Account Login is a Chrome extension developed by Jeff Lai. It is a free add-on tool that allows users with multiple library cards from major cities in Taiwan to conveniently access all their accounts and view their borrowing status in one place.

With this extension, users can log in to multiple library accounts simultaneously and see all their borrowed or reserved books. It eliminates the need to switch between different library websites or apps, saving time and effort.

Recent version updates include support for the new official website of Kaohsiung City Library and the upgrade of the Chrome extension to Manifest V3. There is also support for the new official website of Tainan City Library, although only reservation books can be displayed currently.

Overall, the Library Multi-Account Login extension provides a convenient solution for users with multiple library cards to manage their borrowing and reservation activities across different libraries in Taiwan.