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

Firefox does not add file extension on files when saving

  • 2 replies
  • 5 have this problem
  • 12 views
  • Last reply by sunfish62

more options

When I ask to save a file, the save dialog box in Firefox deletes the file extension (e.g., "doc", "pdf", "ofx") from the filename, and I must manually add it back. Prior versions did not behave this way.

When I ask to save a file, the save dialog box in Firefox deletes the file extension (e.g., "doc", "pdf", "ofx") from the filename, and I must manually add it back. Prior versions did not behave this way.

Chosen solution

You can try to delete the mimeTypes.rdf file in the Firefox Profile Folder.

  • Help > Troubleshooting Information > Profile Directory: Open Containing Folder
Read this answer in context 👍 0

All Replies (2)

more options

Chosen Solution

You can try to delete the mimeTypes.rdf file in the Firefox Profile Folder.

  • Help > Troubleshooting Information > Profile Directory: Open Containing Folder
more options

Um.. No. Didn't work. Unfortunately. But thanks.