There ya go. I don't want to be opted in to sending ANYTHING to Mozilla, especially advertisement effectiveness detail. I'm certain that's going to include non-anonymized data or it's mostly useless, I can't see what's being sent, but it may not be secured. I get it, I'm not the majority, with ublock and a pi-hole there's not much to even go on before I made the config change. I guess it's about time to move away from core firefox branch.... but that comes with it's own concerns.