How to stop Firefox opening xml files and get gedit to open them instead

Change this way

  1. Right click on a xml file
  2. Choose "Properties"
  3. Click on the "Open With" tab
  4. Choose your new default editor

If you still face the issue Please have look on this page : http://linuxfud.wordpress.com/2006/09/03/ubuntu-linux-file-associations/

(or )

Change the default "Open with" program for a file type

  • In Nautilus, right click on the file and choose Properties from the menu that appears. The Properties dialog opens.

  • Click on the Open With tab. A list of applications appears.

  • Select the default application you want for the file type. If the application is not on the list, use the Add button to add the application to the list.