nautilus

grep -rl Name=org.freedesktop.FileManager1 /usr/share/dbus-1/services
sudo mv /usr/share/dbus-1/services/org.xfce.Thunar.FileManager1.service ./

abrir o firefox e o gestor de ficheiros nos downloads e depois:
sudo mv org.xfce.Thunar.FileManager1.service /usr/share/dbus-1/services/org.xfce.Thunar.FileManager1.service

https://unix.stackexchange.com/questions/744254/setting-default-file-ma…

https://bugzilla.gnome.org/show_bug.cgi?id=783090

nano ~/.local/share/applications/mimeapps.list

dentro adicionar o seguinte:
[Default Applications]
inode/directory=org.gnome.Nautilus.desktop;org.gnome.baobab.desktop;

https://orinanobworld.blogspot.pt/2013/12/updating-linux-mint-nemo-v-na…