May be you have changed the default application. You may need to change the settings of Application panel. The Applications panel allows you to choose how Firefox handles different types of files. See this article, Applications panel - Set how Firefox handles different types of files.

If necessary then you can rename (or delete) the mimeTypes.rdf file in the Firefox profile folder to reset all file actions.

• http://kb.mozillazine.org/mimeTypes.rdf
• http://kb.mozillazine.org/File_types_and_download_actions#Resetting_download_actions

You can use this button to go to the currently used Firefox profile folder:

• Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)
• http://kb.mozillazine.org/Profile_folder_-_Firefox

brewcrewgal said

Windows Media Player opens up and I can't find my pdf document. Where do I find my pdf document so I can download it and save it to my flash drive? It used to just open up the document. It never opened up to Windows Media player.

Turns out Adobe Acrobat had to be reinstalled and when I tried to download documents it wasn't finding Adobe. It works fine now.

Turns out Adobe Acrobat had to be reinstalled and when I tried to download documents it wasn't finding Adobe. It works fine now.