Viewing a PDF with Safari

[ReggieS]

When I open a PDF with Safari am I viewing it with Safari itself or does Safari run the OS X native PDF viewer Preview? How does Safari handle PDF viewing? I'm running OSX 10.5 Safari 4.0.5.

 

[spillproof]

When you open the PDF, the menu bar will tell you which app you are currently using, Safari or Preview, depending on your settings in Safari for handling PDFs.

 

[ReggieS]

I understand how to tell which program I am currently using. I am wondering more specifically if Safari and Preview use the same OSX native framework resources to display a PDF, or if there are two different frameworks for viewing a PDF in the system library.