Viewing PDF files in-browser with Firefox (17.0 as of this writing) on a Mac

Hello there,
since I don't remember when there has been a problem with the Adobe Reader NPAPI plug-in and Firefox. Previously, with earlier versions of Firefox and with Adobe Reader 10.x the problem was that the plug-in wasn't working properly and one got a blank page without any explanation. This led to Firefox black-listing the Adobe Reader NPAPI plug-in and having it disabled by default, if I remember correctly. Now it seems we've got the situation reversed, as if Adobe has black-listed Firefox as a browser, because when I try viewing a PDF file in-browser with the most up-to-date versions (17 and 11 for Firefox and Reader respectively), I'm getting the following error:
Adobe Reader cannot show documents in this browser.
We are sorry, but Adobe Reader is unable to show documents in this browser configuration.
Please use your browser to download this file and open it in Adobe Reader or Adobe Acrobat.
To avoid this message in the future, many browsers provide a way to turn off certain add-ons, and some are able to show this document natively.
Please contact your browser vendor for more details.
All's well that ends well, but unfortunately we haven't seen any solution so far. With Safari 6.x the plug-in is working fine. With Firefox it isn't. Let's see what can be done: in its last sentence the error message recommends that I contact my browser vendor for more details. The wording of the first two sentences however suggests otherwise: "Adobe Reader cannot show documents in this browser. Adobe reader is unable to show documents in this browser configuration." Thus, my question is
What is it in this browser and/or browser configuration that doesn't suit the Adobe Reader plug-in? Is it only this newest Firefox version (17) that isn't supported or is it the Firefox browser and why? Should I be able to spoof Firefox' identity and make it seem like Safari to the plug-in, what's going to happen?

Very frustrating, but I found the fix (on another site - can't believe with 360 views, no one here knew). In Firefox, PDFs are automatically set to open with the faulty Adobe plug-in. To change it to open with Adobe Reader, check out the instructions here:
https://support.mozilla.org/en-US/kb/pdf-files-are-blank-and-cant-be-downloaded-mac#os=mac &browser=fx16
Super easy!

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Viewing PDF files in-browser with Firefox (17.0 as of this writing) on a Mac

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