"dekai" is a Chrome browser extension developed by haruyuki_16278. This free tool aims to simplify logging your browsing activities. By using the shortcut ctrl(cmd) + shift + 1, users can easily log their activities. The extension also allows users to copy the log content in Markdown format via a copy button in the popup window.

Moreover, users can select text on a webpage and use a shortcut key to log the content, making it convenient to record relevant information. Whether it's tracking down the cause of a malfunctioning source code or saving useful references found on a page, "dekai" helps users efficiently document their browsing experiences.