k4dirstat declare it self has being able to open folders (this is in usr/share/applications/k4dirstat.desktop).
There is no way to specify a MIME priority in a .desktop file. Users are expected to configure this priority them self. To do so edit/create $HOME/.config/mimeapps.list (user specific) or /etc/xdg/mimeapps.list (system wide) and add: [Default Applications] inode/directory=thunar.desktop <-- enter your prefered file manager here xfce4-mime-settings provide a GUI for that. I guess that KDE and Gnome have similar tools. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1912190 Title: k4dirstat overriding default file manager in Firefox To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/k4dirstat/+bug/1912190/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs