An exciting development for this Linux app sandboxing and distribution tech. This would also help improve Google Chrome/Chromium support outside the likes of RPM and Debian based distributions with a cleaner packaging experience.
Thankfully Librewolf still uses AppImage as an option.
The only Flatpak I bother with is the Kodi one because my distro has incompatible (read stable) library version on several things for compiling it and I'm considering just jumping to jellyfin for that, as well.