We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

How do I change the Adode version?

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by TonyE

more options

When I try to print a PDF file from a website I receive the following error: The Adobe Acrobat/Reader you are running cannot open PDF files in a web browser. Please exit Adobe and your browser and try again. When I look in Tools, Options, Applications, Adobe the version of the reader is 5(default). This is a writer to create PDF files. I also have a reader version 9. How do I change the default?

When I try to print a PDF file from a website I receive the following error: The Adobe Acrobat/Reader you are running cannot open PDF files in a web browser. Please exit Adobe and your browser and try again. When I look in Tools, Options, Applications, Adobe the version of the reader is 5(default). This is a writer to create PDF files. I also have a reader version 9. How do I change the default?

All Replies (1)

more options

For the settings to check see opening PDF files within Firefox. In the list of Applications, if Adobe Reader 9 is not listed, select the "Use other" option to find and select Adobe Reader.

You should also check to ensure there is not an old version of the PDF plugin in the Firefox plugins folder. Go to the plugins folder inside the Firefox installation directory, normal location will be C:\Program Files\Mozilla Firefox\plugins

If there is a file there named nppdf32.dll you can delete it.