People had to raise hell to get that, while being made fun of by their CMs on social media. Even the opt-out is full of silicon valley dark patterns. Whoever is calling shots about the product at Mozilla doesn't have your best interests at heart.

What are those dark patterns? It's an off button, it works, and it does not get back on. It's the polar opposite of the "maybe later, I'll ask again every week and reset the setting in your back" unfortunate norm that plagues a lot of major proprietary software/service.

"You can turn it off" is not in the same category of "would you like to turn this on?" or even "do you want this in the first place?"

Opt-out is not consent, nor is it respect.

Opt-out is a dark pattern, period. Opt-out is forcing something onto users and hoping they don't go out of their way to disable it. It is the same as "maybe later".