Should I install Discord through the GNOME Software app as a Flatpak, or should I install it by downloading the .deb file through the Discord website?
Whenever possible, choose packaging formats native to your OS to install programs. For ZorinOS, that's
Flatpak can be useful when there's no other option available as it's meant as a cross-platform package format. In my experience it works okay most of the time but there are a few caveats that can lead to issues ranging from little annoyances to breaking parts of the program, which is why I try to go with the native option whenever possible.
I using a Discord webside with .deb package
I using any original webside with .deb package software.
If you want ti extend Discord functionality, use
It only works with the native app.