Handling pdf files has changed not long ago. You are on apparently on an old version (fx14) of Firefox. You are apparently using OS X 10.8 and that will run the current Release of Firefox (fx23.0.1 soon to be fx24).

Please first of all update Firefox then post back

• see Update Firefox to the latest release

Also see

• Use Adobe Reader to view PDF files in Firefox
• PDF files are blank or cause an error message on Mac

Could you try disabling the Adobe Acrobat Plugin on the following page:

Tools menu > Add-ons > Plugins category

Then in the following dialog, select a different viewer or application to handle PDFs:

Firefox menu > Preferences > Applications

Allow a few moments for the list to appear, then type pdf in the search box above the list to quickly access the setting.

Does that solve it?

Even before the answer came I somehow realized (but hitting different sites) that I need to upgrade. Since I've done that and figured out where the download button is (I hope I remember this) it works. Thanks for solutions so promptly.

Glad it is fixed, thanks for posting back.

Additional links that others may find of use are

• View PDF files in Firefox or choose another viewer
• Where to find and manage downloaded files in Firefox

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 or Adobe Acrobat Document.

• Firefox > Preferences > Applications > Adobe PDF document : Use Adobe Reader

• https://support.mozilla.org/kb/change-firefox-behavior-when-open-file