User can download a image via "View only" link on mobile browser
User can download a image by pressing the image and selecting "Add Photo"/"Download Image" when opening the image via "View only" shared link on mobile devices's (iPhone or Android) web browser .
Even if user has "View only" permission, there is no way to prevent downloading a image file on mobile browser. We need a way to prevent downloading a image on mobile browser.
AdminMotoaki Nakashima (Support, Box) shared this idea