I get only a blank page when I click on a pdf file on a website. (I am able to open in Safari with a right click.)
I downloaded the PDF Viewer, but it didn't help.
I went to TOOLS to disable blocking extensions, but none were listed.
Go to Solution.
Disable the Adobe Reader plugin in Firefox (Tools > Add-ons > Plugins) and use the external Adobe Reader application or Preview application instead.
PDF files may be found under entries like Portable document or Adobe PDF document.