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.

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

Mulongo oyo etiyamaki na archive. Tuna motuna mosusu soki osengeli na lisalisi

Firefox doesn't open file with .pdf extension

  • 2 biyano
  • 4 eza na bankokoso oyo
  • 1 view
  • Eyano yasuka ya qoom

qoom
qoom
more options

Hello. If downloaded file has ".pdf" extension firefox can't open it saying "file.pdf could not be opened, because the associated helper application does not exist. Change the association in your preferences." It opens pdfs only after removing ".pdf" from filename (it works for all of pdf documents). I have 2 pdf related options in Preferences->applications: Portable Document Format (PDF) - is set to preview in firefox; PDF Document - is set to Use (default) and it has not option preview in firefox. I'm using arch linux and xfce4. There is MIME Type settings in xfce4 & it is set to open in firefox: "application/pdf" - "Firefox". Thanks

Hello. If downloaded file has ".pdf" extension firefox can't open it saying "file.pdf could not be opened, because the associated helper application does not exist. Change the association in your preferences." It opens pdfs only after removing ".pdf" from filename (it works for all of pdf documents). I have 2 pdf related options in Preferences->applications: Portable Document Format (PDF) - is set to preview in firefox; PDF Document - is set to Use (default) and it has not option preview in firefox. I'm using arch linux and xfce4. There is MIME Type settings in xfce4 & it is set to open in firefox: "application/pdf" - "Firefox". Thanks

Solution eye eponami

Try to rename/remove the mimeTypes.rdf file in the Firefox profile folder to reset all file actions.

You can use this button to go to the current Firefox profile folder:

Tanga eyano oyo ndenge esengeli 👍 1

All Replies (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Solution eye oponami

Try to rename/remove the mimeTypes.rdf file in the Firefox profile folder to reset all file actions.

You can use this button to go to the current Firefox profile folder:

qoom
qoom Nkolo motuna
more options

thanks, it works now