Someone who reviewed Nobara a while back said it best: Arch is bleeding edge while Fedora is cutting edge. Both embrace new things in the Linux world like systemd, Btrfs and PipeWire, but Fedora tries to keep things stable.
I might hop back onto it if my Arch install cakes it.
Bypass Paywalls was removed by Mozilla IIRC. It is on GitHub though so you can just install the .xpi just fine.