So, I might be wrong on this, too… But I don’t think it’s too ambiguous.

Something that hasn’t been made clear: Firefox will have an option to completely disable all AI features.

We’ve been calling it the AI kill switch internally. I’m sure it’ll ship with a less murderous name, but that’s how seriously and absolutely we’re taking this.

They have a button that turns stuff off. Not on. So for me, it’s kind of clear that they’re building an opt-out solution.