Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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

Wrong Download File Type

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

more options

When I try to open a file from a particular site, a .csv file, Firefox seems to think it's a txt file, as seen in the attached image. When I save the file it downloads fine as a .csv, as it should. Why is it that this .csv is seen as a .txt only when selecting "open" but not "save" and how can I fix this? Thank you.

When I try to open a file from a particular site, a .csv file, Firefox seems to think it's a txt file, as seen in the attached image. When I save the file it downloads fine as a .csv, as it should. Why is it that this .csv is seen as a .txt only when selecting "open" but not "save" and how can I fix this? Thank you.
Attached screenshots

All Replies (2)

more options

What's your computer system and Firefox version?

This might be a system issue. Open the computer's file browser and locate that file. Right-click on it and select Properties.

Select General. What does it say to the right of Opens With ?

more options

This usually happens if the server isn't configured properly and sends the file as a text file.

You can check the HTTP response headers in the Web Console or in the Browser Console.