Firefox will always save a PDF file to the temp folder if you open the file in am external PDF viewer. Even if you open the file in the builtin PDF viewer (Preview in Firefox) then the file needs to be downloaded in the disk cache or the memory cache.

• https://support.mozilla.org/en-US/kb/view-pdf-files-firefox
• https://support.mozilla.org/en-US/kb/disable-built-pdf-viewer-and-use-another-viewer

My problem is FireFox is making me save it in my Document Folder before it will let me view it.

What is the current action for PDF files ?

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

Think I found my problem. I went in FireFox options and saw that the "save file" was checked behind PDF files.

Pretty sure that was the problem and will know for sure next time I try to view a PDF. Thank for your help!

Solved my problem. I couldn't work out why things I could access in Chrome could not be accessed in Firefox. Now I know and it was, as usual, my fault! :-)

What is the current action for PDF files ?

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

I manage to set this option. But, some days after, Firefox always "forget" my options and start asking to file pdf files again.

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