One of Flatpak’s main goals is to increase the security of desktop systems by isolating applications from one another. This is achieved using sandboxing and means that, by default, applications that are run with Flatpak have extremely limited access to the host environment.
While application developers have control over the sandbox permissions they wish to configure, good practice is encouraged and can be enforced. For example, the Flathub hosting service places requirements on which permissions can be used, and software on the host may warn users if certain permissions are used.
The KCM allows changing what permissions have been granted to installed Flatpak applications.
This is free and open source software.
Website: invent.kde.org/plasma/flatpak-kcm
Support:
Developer: Ivan Tkachenk
License: GNU General Public License v2.0
Flatpak KCM is written in C++. Learn C++ with our recommended free books and free tutorials.
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This sound much like Flatseal.
Both apps let you review and modify permissions from Flatpak apps. But the way they are implemented is quite different. For example Flatpak KCM is nicely integrated with KDE Plasma.