Mozilla Monitor website will be down for 2 hours starting 5/20/2025 at 6 AM PT. Visit our status site for updates.

Avatar for Username

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.

How do I display file extensions?

  • 4 replies
  • 1 has this problem
  • 45 views
  • Last reply by hldevans

hldevans
hldevans

I want to change file extension from .qdt to .txt. How do I display the file extension so that I may change it? Thanks.

I want to change file extension from .qdt to .txt. How do I display the file extension so that I may change it? Thanks.

Chosen solution

That's not a Firefox preference, it's part of Windows.

File browser = Windows Explorer - not to be confused with Internet Explorer

Control Panel > Folder Options -> View --> Advanced Settings

Turn off Hide extensions for known file type

Read this answer in context 👍 0

All Replies (4)

FredMcD
FredMcD

You are talking about in the computers files, yes? Open the file browser. On the Menu bar, select Tools. Now select Folder Options. In the new window, select View. Look for Hide extensions for known file types and turn it off. Now press OK on the bottom of the window.

hldevans
hldevans Question owner

Firefox has been my browser for the past 20+ years. After selecting Tools in the Menu bar, there is no Folder Options choice in that menu. What am I missing? Thanks.

the-edmeister
the-edmeister
  • Moderator

Chosen Solution

That's not a Firefox preference, it's part of Windows.

File browser = Windows Explorer - not to be confused with Internet Explorer

Control Panel > Folder Options -> View --> Advanced Settings

Turn off Hide extensions for known file type

hldevans
hldevans Question owner

Second reply. I had been unable to find Folder Options until I entered it in the Search space above Start. I could then proceed from there as you instructed. Thanks.