How can I view a PDF in Firefox when the server specifies the wrong content type?

Posted by Sam on Super User See other posts from Super User or by Sam
Published on 2012-10-31T05:41:17Z Indexed on 2012/10/31 11:04 UTC
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firefox

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pdf

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adobe

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mozilla

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mime-types

I am using Mozilla Firefox with a PDF viewer plug-in. The plug-in has been correctly associated with Adobe Reader files to view them in the browser in the settings.

I would like to be able to view PDF files in Firefox rather than downloading them. This already works correctly when a web server indicates that a file has the Content-Type of application/pdf. However, some web servers provide other Content-Types for PDFs, such as application/octet-stream. (See this example of a PDF served with a non-pdf Content-Type.)

I have looked at Firefox's MimeTypes.rdf file, and it appears to only support mapping applications based on file types for non-Internet-based files.

How can I have Firefox view all PDF documents in-browser rather than only the ones with the application/pdf Content-Type?

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