Providing a file URL is possible so the notes-template could link to it somehow, or use an exported function to open the PDF externally... but for what? You can simply add the "open manual" action to the tool-bar and use it. A "snapshot" of the first page would mean to render PDF which is troublesome in case of the browser-internal use.

A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]