A plug-in will enable the browser to handle documents with specific mime types, so if the list of mime-types the browser sends to the server encloses also "application/pdf" it means that the user uses a plugin to display pdf-files and you can send this kind o file to the clients browser. But be aware that e.g. the Internet explorer sends only a "*/*" mime-type list if the reload button was hit.

Have a nice day
All decision is left to your taste

In reply to Re: Cross browser plugin detection by little
in thread Cross browser plugin detection by chorg

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