Easy for who? 99% of people are not going/able to setup firefox policies.
Even if we ignore things like "they're chasing AI fads instead of better things" and "they're adding attack surface" and so forth, and just focus on the disabling feature toggles thing...
... Mozilla has re-enabled AI-related toggles that people have disabled. (I've heard this from others and observed it myself.) They also keep adding new ones that aren't controlled by a master switch. They're getting pretty user-hostile.
Is it really in all 4 of those places? Just need to change it in the first two, right? I hate the new AI tab feature and wish they had a non-AI option.
This is like when people defend Windows 11's nonsense by saying "you can disable or remove that stuff". Yes, you can. But you shouldn't have to, and I personally prefer to use tools which don't shove useless things into the tool because it's trendy.