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.

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

Este fío arquivouse. Faga unha nova pregunta se precisa axuda.

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 resposta
  • 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/