Blurry PDF on responsive design using the Adobe API

Hello, I am using the Wordpress plugin "PDF embed" (https://wordpress.org/plugins/pdf-embed/) which uses the Adobe API. When I use embed mode “inline” the rendering on mobile view is blurry/fuzzy – is there a workaround for that? Desktop view is normal/sharp. Full window or Sized Container work on mobile view (text is also sharp). Already contacted the author of the plugin and he gave me the advise to ask here.

Looking forward to a respond. Thank you

Benjamin