Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

When trying to save a PDF file I have it set to use my PDF viewer but once I use it, it switches back to "Save PDF" for the next time? How do I stop this?

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by cor-el

more options

>Options>Applications>Use PDF Viewer Plus

>Options>Applications>Use PDF Viewer Plus
Attached screenshots

Modified by mrsatbow

All Replies (1)

more options

The action that you see in "Tools > Options > Applications" are tied to a specific MIME (content) type.

Firefox only support the built-in PDF Viewer for the application/pdf MIME type (likely the second entry: Portable Document Format (PDF)), so if the server sends such a file with a different MIME type then you may have created another entry like the first entry Portable Document Format.

Modified by cor-el