This should detect whether KDE is running via the DESKTOP_SESSION variable (seeing if it says "kde") and if so, it should use "kfmclient exec" to open the containing folder, making it use KDE's default file manager. But apparently Mozilla only cares about GNOME.
This should detect whether KDE is running via the DESKTOP_SESSION variable (seeing if it says "kde") and if so, it should use "kfmclient exec" to open the containing folder, making it use KDE's default file manager. But apparently Mozilla only cares about GNOME.