Flatpak

Flatpak is Article description::a package management framework aiming to provide support for sandboxed, distro-agnostic binary packages for Linux desktop applications.

Files

 * - global flatpak state (system-wide installed apps and repos)
 * - per-user flatpak state (locally installed apps and repos)
 * - per application state (configuration files and cache)

Basic usage
To install an application, e.g. Thunderbird, run:

To run the application use created .desktop file or run:

To update installed applications and runtimes:

Theming
Flatpak documentiation offers a good guide about desktop integration and theming.

GTK
Flatpak applications don't follow the system's GTK theme by default. First find out what's the current GTK theme, e.g. Materia-dark-compact, and then install it for Flatpak applications to use.

Fixing jagged fonts on Wayland
Some users report jagged fonts on Wayland. The workaround is to install gnome-settings-daemon.