Is it possible to create a default mimeTypes.rdf file for all the existing and new users ? So that whenever a user opens the firefox for the very first time, he will get the specified rdf file in his profile @ ~/.mozilla/firefox/*/mimeTypes.rdf


If you are creating users with useradd you can file directory /etc/skel to put files and directories in users home directories.

man useradd: The skeleton directory, which contains files and directories to be copied in the users home directory, when the home directory is created by useradd.

So you should create two files:

  • /etc/skel/.mozilla/firefox/PROFILE_NAME/mimeTypes.rdf with content that you need
  • /etc/skel/.mozilla/firefox/profiles.ini with:

    Name=Default User

It should do the work with new users.


I found occurrences of /usr/lib/firefox/defaults/profile/mimeTypes.rdf on the web, but I'm not sure it will be used by recent versions of firefox. Might be worth a try!

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