I’ve been using version 1.0 of this for quite some time and love it. PDF Browser 2.0 turns pdfs into integrated parts of the web:
PDF Browser Plugin turns your web browser into the best PDF viewer available. With the help of PDF Browser Plugin you can view PDF documents directly in your web browser, print them, and save them to disk if you’d like to keep them.
It’s free (for individuals). It’s cool. Get it.