After creating a fresh installation of Ubuntu 24.04, I installed DEB Firefox from APT by following Mozilla’s instructions from here. But I noticed that it was secretly replaced with Snap Firefox. I was able to verify this by checking the About Firefox page. This is the third time I noticed this.
I’d suggest the KDE flavor of Debian, then. Its settings manager is divine, and its software management platform ties every other package management system in (apt/dpkg for Debian, yum for Redhat, pacman for Arch, plus flatpak, nixpkg, and even snaps if you absolutely must). By default starting in Plasma 6.0.
More to @fmstrat’s point, and to suggest a possible cause your friend had that impression: if you install the Minimal flavor of any distro, you’re going to get a minimal experience.
It was the KDE version.