I know that this is a fairly common problem, but I've never had it before: if a pdf is displayed in a Safari window, clicking the download icon in the overlay in the bottom middle of the window doesn't do anything. I know that a common cause is the presence of an AdobePDFviewer plugin, but it isn't installed and Preview is my default app for reading PDFs. I know that I can do a "Save As," but I'd like to regain this functionality.
I've tried various other remedies, to no avail.