Meet Ubuntu Flatpak Remix, Ubuntu with Flatpak Support Preinstalled
That was fast! After Canonical’s announcement that future Ubuntu releases won’t include Flatpak support by default, someone already made an unofficial Ubuntu flavor that ships with support for Flatpak apps preinstalled and working out of the box, called Ubuntu Flatpak Remix.
Several key apps are preinstalled in the Flatpak format rather than as a Snap app, including the Mozilla Firefox web browser, Mozilla Thunderbird email client, and LibreOffice office suite. Support for the Flathub portal is installed as well, so you’ll be able to install more apps with just a few clicks.