如何获取浏览器的内容，包括窗口的菜单栏，框架/边框和折叠下方的内容？

I remember in the early days of the web, there were books that included the whole browser window's title bar, menu bar, and even the border of the browser, and the content inside of it -- not just the current content in the window, but all the content even when scrolled down).I remember in the early days of the web, there