You can install Firefox from Mozilla's own repository. It is a luxury to have in Debian a Mozilla repository to install Firefox.

If you want full system control and a rolling distribution with a good security setup, stay with openSUSE Tumbleweed. Immutable distributions like SilverBlue, Aeon,...are not recommended for everyone, only for those who don't want to administer their system and who have good hardware and a good internet connection.

My experience with Arch+Gnome has been problematic with Gnome version changes. When I upgraded to Gnome 46, the system wouldn't boot. I have had several problems related to grub and aur, so a few months ago I decided to abandon Arch for good. I need a distro that works for me, not me for the distro.

Great news, but I would put more effort into making Anaconda a faster and more intuitive installer.

If you want to learn about Arch, I recommend you to use ArcoLinux, a distribution that uses the direct Arch repositories (unlike Manjaro) and serves to acquire knowledge about Arch.

The main difference between Arch and Tumbleweed, apart from the package type, is the update system. Tumbleweed does it through snapshots, which allows you to use the openQA automatic test to test the snapshot before sending it to the community. Arch upgrades on a package-by-package basis, regardless of the other packages that are part of the system.

I am 100% happy. I use a rolling distro, secure (firewall+apparmor), stable (snapshots tested through openQA) and easily revert to a previous snapshot (snapper). Yes, I am using openSUSE Tumbleweed and in my opinion there is no rolling distro that offers all these features.