discover 5.10 beta installs two different desktop files to /usr/share/applications: org.kde.discover.desktop and org.kde.discover-flatpak.desktop. They both show in the menu as "Discover", and they both (apparently) simply launch discover.
Correct, the second one is just to link the mime-type to the application. Just shouldn't be on the menu.
Git commit 13d96d15a177132b6d3607a7f389a60cb7d615af by Antonio Rojas. Committed on 14/05/2017 at 21:25. Pushed by arojas into branch 'Plasma/5.10'. Fix duplicate Discover entry on the Application Menu Differential Revision: https://phabricator.kde.org/D5850 FIXED-IN: 5.10 M +1 -0 libdiscover/backends/FlatpakBackend/org.kde.discover-flatpak.desktop https://commits.kde.org/discover/13d96d15a177132b6d3607a7f389a60cb7d615af