Whenever I open up a pdf in firefox, I am given the option to either save the file or open it with safari. I usually open it with safari, but then the file is placed in my downloads folder anyway. There have been a lot of pdfs I have had to open lately, due to certain classes I am in. I was wondering though if there was a way I can open pdfs with firefox without them saving to my hard drive. I know I can do this in Windows, but can not figure out a way to do it with a Mac.