Display PDF within web browser
I use Google Docs embeddable PDF viewer. The docs don't have to be uploaded to Google Docs, but they do have to be available online.
<iframe src="http://docs.google.com/gview?url=http://path.com/to/your/pdf.pdf&embedded=true"
style="width:600px; height:500px;" frameborder="0"></iframe>
preffered using the object tag
<object data='http://website.com/nameoffolder/documentname.pdf#toolbar=1'
type='application/pdf'
width='100%'
height='700px'>
note that you can change the width and height to any value you please visit http://www.w3schools.com/tags/tag_object.asp
instead of using iframe and depending on the third party`think about using flexpaper, or pdf.js.
I used PDF.js, it works fine for me. Here is the demo.