FilezillaDefaults.xml

<FileZilla3>
  <Settings>
    <Setting name="Config Location">/Users/[Username]/Dropbox/Config/Preferences/filezilla/</Setting>
    <Setting name="Kiosk mode">0</Setting>
    <Setting name="Disable update check">0</Setting>
  </Settings>
  <Servers>
  </Servers>
</FileZilla3>

FilezillaDefaultsUsage.txt

  Usage:

    - Windows:

      Put the file fzdefaults.xml into the same directory as filezilla.exe

    - OS X:

      Modify the app bundle, put fzdefaults.xml into the
      Contents/SharedSupport/ subdirectory

    - Other:

      Put fzdefaults.xml into one of the following directories (in order of precedence):

      - ~/.filezilla
      - /etc/filezilla
      - share/filezilla subdirectory of the install prefix.