The "select box search" Chrome extension, developed by Takashi Sugimoto (tksugimoto), is a free add-on that enhances the functionality of select boxes within web pages. With this extension, users can now search within select boxes, making it easier to find specific options.

Once installed, the extension adds a new option to the right-click menu called "ページ内のセレクトボックスを検索可能にする" (Make Select Boxes Searchable on This Page). When selected, a search box will appear at the top of the select box, allowing users to type in keywords and instantly filter the options.

One notable feature of this extension is that the currently selected option is always displayed, making it easier to keep track of the selected item while searching. This is especially useful when dealing with long lists of options.

Overall, "select box search" is a handy Chrome extension for anyone who frequently uses select boxes on web pages. It provides a simple and convenient way to search within select boxes, saving users time and effort.