PDF viewer for Drupal I'm searching for a PDF viewer for Drupal 7 which doesn't renders as a Mozilla Firefox PDF or a google's PDF. 

Does someone know anything that I could use?
Seems you're looking for the PDF module

Uses HTML5 to display PDF files if users don't have pdf plugin for their browsers.
With this module you can use pdf.js to display PDF file all the time or only use pdf.js when visitors don't have pdf reader plugin.