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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Error msg when I click on a PDF file link I ".pdf could not be opened, because an unknown error occurred. Try saving to disk first and then opening the file."

  • 1 reply
  • 4 have this problem
  • 1 view
  • Last reply by Andrew

riabroi
riabroi
more options

When I click on a link to view a PDF file, I receive the error msg: ".pdf could not be opened, because an unknown error occurred. Try saving to disk first and then opening the file."

Firefox vsn 19.0.2 Adobe PDF Plug-In for Firefox and Netscape 11.0.2.0 Tools/Options/Applications/Content Type = PDF File/Action = Adobe Reader

Am able to download/view the file, but want to view in a Firefox window

When I click on a link to view a PDF file, I receive the error msg: ".pdf could not be opened, because an unknown error occurred. Try saving to disk first and then opening the file." Firefox vsn 19.0.2 Adobe PDF Plug-In for Firefox and Netscape 11.0.2.0 Tools/Options/Applications/Content Type = PDF File/Action = Adobe Reader Am able to download/view the file, but want to view in a Firefox window

All Replies (1)

Andrew
Andrew
  • Moderator
more options

Please install the following add-on to see if it helps. 

https://addons.mozilla.org/en-US/firefox/addon/pdfjs/