.dotfiles/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-notifyd.xml

<?xml version="1.0" encoding="UTF-8"?>

<channel name="xfce4-notifyd" version="1.0">
  <property name="log-max-size-enabled" type="bool" value="true"/>
  <property name="applications" type="empty">
    <property name="known_applications" type="array">
      <value type="string" value="electrum"/>
      <value type="string" value="FileZilla"/>
      <value type="string" value="flameshot"/>
      <value type="string" value="Gnac"/>
      <value type="string" value="IceCat"/>
      <value type="string" value="notify-send"/>
      <value type="string" value="org.xfce.Thunar"/>
      <value type="string" value="Strawberry"/>
      <value type="string" value="Xfce volume control"/>
      <value type="string" value="xfce4-settings-helper"/>
    </property>
  </property>
</channel>