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I am not able to open pdf files from any web through Firefox. Internet explorer opens those pdf files


I am not able to open pdf files from any web when I use FireFox. I am able to open pdf files when I use internet explorer.

Additional System Details

Sites Affected


Installed Plug-ins

  • Adobe PDF Plug-In For Firefox and Netscape
  • Shockwave Flash 10.0 r32
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Default Plug-in
  • LabVIEW 8.5 Netscape Plug-in for Win32
  • Next Generation Java Plug-in 1.6.0_21 for Mozilla browsers


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv: Gecko/20090824 Firefox/3.5.3

More Information

  • Moderator
1041 solutions 8840 answers

For the settings to check, see the View PDF files in Firefox without downloading them article.