How to determine if the user's browser can view PDF files

Question

What\'s the best way for determining whether the user\'s browser can view PDF files?

Ideally, it shouldn\'t matter on the browser or the operating system.

I

Answer 1

Neither, none, don't try.

Re dawnerd: Plug-in detection is not the right answer. I do not have a PDF plugin installed in my browser (Firefox on Ubuntu), yet I am able to view PDF files using the operating system's document viewer (which is not Acrobat Reader).

Today, any operating system that can run a web browser can view PDF files out of the box.

If a specific system does not have a PDF viewer installed and the browser configured to use it, that likely means that either it's a hand-made install of Windows, a very trimmed down alternate operating system, or something really retro.

It is reasonable to assume that in any of those situation the user will know what a PDF file is and either deliberately choose not to be able to view them or know how to install the required software.

If I am deluding myself, I would love to have it explained to me in which way I am wrong.