However, we should consider that this is about online privacy features, which is a fairly hot topic nowadays. And it kind of feels that we got drape curtains* instead of a lock - and I think it's not exactly what people would reasonably expect for a feature like this? Or do they clarify that it's a weak protection somewhere?

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*) I mean, it can be unlocked by literally opening JS console and typing one command. That's a gate latch at best.