Getting Started with Headless Chrome - Chrome Developers
ps://developer.chrome.com/blog/headless-chrome/
Chrome’s Headless mode gets an upgrade: introducing `--headless=new` - Chrome Developers
ps://developer.chrome.com/articles/new-headless/#-virtual-time-budget

"C:\Program Files\Google\Chrome\Application\chrome.exe" --headless --disable-gpu --virtual-time-budget=10000 --window-size=1920,2100 --screenshot=c:\Pictures\screenshot-21.png "スクリーンショットを撮りたいページのURL"