🚀 go-pugleaf

If you have Acrobat Reader 9 and Acrobat 8 installed on your computer, or previously had Reader 8, you might also have issue with older version of plugin in the Firefox folder.

Thank you to Gene Hutton, who posted link to

 <http://kb.adobe.com/selfservice/viewContent.do?externalId=333563>

This is what helped me (pay attention to the version of dll in the plugins folder):

The Acrobat PDF plug-in (Nppdf32.dll) installs to the following folders:

-- Acrobat: Adobe/Acrobat 8.0/Acrobat/Browser

-- Adobe Reader: Adobe/Acrobat 8.0/Reader/Browser

-- Acrobat and Adobe Reader: Program Files/Mozilla Firefox/plugins

If you select a PDF file after installing the plug-in, the PDF file will download to the browser's Temp folder, and the browser will open Acrobat or Adobe Reader to display the file within the browser window. The Acrobat toolbar at the top of the browser window is an indicator that the PDF plug-in installed correctly.

If a PDF file doesn't display properly, then you may need to manually move the Acrobat PDF plug-in to the browser's plug-ins folder, if the plug-in isn't installed there automatically.