It can run on full web browser, so why do you want it in web viewer?
I can't test it but may work on at least Windows FMP.
I would recommend you to create a table for Files where you have a Container field. Then show this field on your layout. You can not scroll through pages but it is much easier for you to handle Open/Close files that way natively from inside FileMaker.
WebViewer can not scroll pages in a WebViewer as far as I know