Firefox PDF viewer (plugin) corrupts files upon download

This is a bug report. We have found that PDF files opened in the Firefox built-in viewer (plug-in) can become corrupted when downloaded using the 'Download' icon on the upper right-hand corner of the screen. When we attempt to open one of these damaged files using Acrobat, this error message is displayed:
'There was an error opening this document. The file is damaged and could not be repaired.'
If we instead download the file by right-clicking in the viewer plug-in and select 'Save Page As...' the file is downloaded undamaged.
One example where this behavior occurred is with the the file labeled: Butterfish Fishery Information Document
on the page:
http://www.mafmc.org/ssc-meetings/2013/april-may

Someone should agitate for uplifting the fix to Firefox 25. I've probably saved dozens of PDFs this way, some of which may be dynamically generated during a transaction and now unrecoverable. !!
''Note: I'm aware of one such unrecoverable corrupted file so far, because I forwarded it to someone for uploading into a document management system and they send the error message back to me. How many were not reported back to me? Hmmm...''

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Firefox PDF viewer (plugin) corrupts files upon download

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