Currently Being ModeratedMay 12, 2013 12:18 AM (in response to miguel53)
This discussion addresses your question:
Maybe something in there will do the trick for you.
Currently Being ModeratedMay 12, 2013 12:23 AM (in response to miguel53)
I had the same problem but I had been able to resolve it. I you want to permanent delete this plug-in you got to browse through the file system of the hard drive (Macintosh HD) in your Mac. Go to the Finder app and click on you computer icon. Then go through the following path: Macintosh HD//Library/Internet Plug-Ins... There you will see the "AdobePDFViewerNPAPI.plugin", and when you move it to the Trash app, Safari will automaticly use the Preview app plug-in to open pdf on the web.