Chrome ditto. I am baffled by this.
chrome.exe --headless --dissable-gpu --window-size=1920x5400 --screenshot="C:\\Users\Foo\\Desktop\\img.png" "https://somesite.com"
chrome.exe --headless --dissable-gpu --save-to-pdf="C:\\Users\Foo\\Desktop\\doc.pdf" "https://somesite.com"