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.

When selecting "Open" Firefox is appending ".XSLX" to CSV files in Excel.

SamT
SamT
more options

Hi All,

I'm trying to export a CSV file from a website and when selecting "Open", Firefox is appending ".XSLX" to CSV files in Excel and I cannot open the file.

Saving the file works fine (saves in CSV) but it is a little annoying that I cannot open the file without having to save and then open it.

Any suggestions would be greatly appreciated.

Cheers Sam

Hi All, I'm trying to export a CSV file from a website and when selecting "Open", Firefox is appending ".XSLX" to CSV files in Excel and I cannot open the file. Saving the file works fine (saves in CSV) but it is a little annoying that I cannot open the file without having to save and then open it. Any suggestions would be greatly appreciated. Cheers Sam
Attached screenshots

All Replies (1)

user104147805413306348376805769878442569366
user104147805413306348376805769878442569366
more options

Hi SamT, It looks like you need to change what action Firefox takes for defined content types. This article should offer all of the information that you need: Change what Firefox does when you click on or download a file