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PDFs are going straight to save as


I wanted to get rid of the PDF.js viewer, so I followed the instructions on another thread that said:

     "You can disable the new viewer as follows: type or open the address about:config search for entry pdfjs double click on the entry pdfjs.disabled;false and it will toggle to true You can then set things up the way you had them before according to your choice and OS."

Now whenever I click on a PDF the save as box comes up straight away. My Acrobat plug-in is enabled, how can I get firefox to start using it again?

Modified by elestano9

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.6 r602
  • Next Generation Java Plug-in 10.15.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Google Update
  • DivX Plus Web Player version
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Unity Player 4.0.1f2
  • Adobe Shockwave for Director Netscape plug-in, version
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.4
  • 5.1.10411.0
  • GEPlugin
  • DivX VOD Helper Plug-in
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • Office Authorization plug-in for NPAPI browsers
  • npdivxplayerplugin
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers


  • User Agent: Mozilla/5.0 (Windows NT 6.0; rv:19.0) Gecko/20100101 Firefox/19.0

More Information

  • Top 25 Contributor
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622 solutions 8025 answers

Helpful Reply

You may also have to set the action correctly for your plugin see

  • Top 10 Contributor
  • Moderator
10756 solutions 96800 answers

You can change the action for Portable Document Format (PDF) from Preview in Firefox to use the Adobe Reader in "Firefox > Options > Applications".

See also: