The 서울대학교 도서관 학외접속 지원 플러그인 is a Chrome add-on developed by swz. It is a free tool that provides authentication and access features for the 서울대학교 도서관 학외접속 (Seoul National University Library Off-campus Access) service.

With this plugin, users can easily access the 서울대학교 도서관 학외접속 service through two methods. Firstly, they can click on the plugin icon located at the top of their browser. Alternatively, they can access the plugin menu from the context menu and select the 서울대학교 도서관 학외접속 option to connect to the current page through off-campus access.

It's worth noting that for the initial connection, users will need to authenticate themselves by logging into the Seoul National University Central Library website. This authentication process only needs to be completed once.