Is there a way to install a plugin for Firefox, but not Safari?
I just downloaded the PDF Browser plugin, and installed it by dragging it to ~/Library/Internet Plug-Ins. It works great with Firefox, for which it seems to be the only way of opening pdfs in the browser. However, in Safari two-finger trackpad scrolling doesn't work in pdf documents, so I would prefer to use the built-in pdf viewer (Safari 2.0, OS X 10.4).