That's... Not really a switch. If somebody has to go to a secret place, get past a warning sign, and type in a half dozen secret commands... it sounds more like an espionage movie than the flipping of a switch.

And people have already complained that some of those flags don't affect newer ones, which Mozilla keeps adding. We might as well say Microsoft has a setting to turn off telemetry, never mind it's also hidden and it also keeps getting switched back on.