I noticed when upgrading from FireFox version 32.0.3 → 33.0.2 that I can no longer print or view .pdf files.
When navigating Menu → Options → Applications & filtering by Portable Document Format (PDF) - regardless of which action I choose an error occurs.
When choosing the Save File or Use Adobe Reader actions:
The download staggers and upon retrying completes yet the file is corrupt & contains .html code instead.
When choosing the Preview in Firefox action: I get the following error in Firebug:
An error occurred while loading the PDF.
PDF.js v1.0.473 (build: 1694cd8)
Message: undefined
I've found the following resource which may be related to this:
How to fix broken "Print to AdobePDF" ?
I discovered this using Magento, here is my initial post:
PDF files printed via Magento damaged / failing to download?
I realized this isn't Magento specific once I saw it working perfectly in Google Chrome / Opera & IE. Any ideas?