百度搜索拓展插件 SearchBD is a Chrome add-on developed by Guan Yongjie. It is a free tool that enhances the browsing experience by allowing users to easily search selected text using Baidu, a popular search engine in China.

With this add-on, users can simply right-click on any selected text on a webpage and choose the "Baidu Search" option to quickly look up the selected text on Baidu. This eliminates the need for copying and pasting the text into the search bar, saving users time and effort.

The add-on also provides one-click access to Baidu's homepage, making it convenient for users to directly visit the Baidu website. Currently, the add-on supports Baidu web search, image search, and video search.

Please note that this is an unofficial version of the add-on and some features may be limited. However, the developer plans to release future updates with more functionality.