I cannot open pdfs in Safari. I can open them in Firefox. Right now I have pdfs on my desktop and they just say pdf on them instead of showing the contents. If i right click I can scroll down to "open with" and choose "preview" and that works. I need to fix this. If you have instructions for me include all of the steps because i am not that savvy. For instance, I have no idea how to locate "library" etc.