Select box filter

select boxをCtrl+Click（Command+Click）するとフィルタモードになり、隣に入力欄が出現します。出現した入力欄にフィルタしたいキーワードを入力すると選択肢がフィルタされます。

Select Box Filter is a Chrome extension that transforms your select boxes into filterable fields. Simply use Ctrl+Click (or Command+Click) to activate the filter mode. A separate input field appears next to the select box for easy filtering. The extension only alters the layout minimally and even works on pages utilizing 'selectedIndex', ensuring no dramatic changes to your browsing. It also disregards distinctions in capitalization, Kana type, and SBC/DBC.