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OK, so, probably an ignorant question, but here I go anyway: What, exactly, does "turning off IDFA" do? Does it send just a dummy IDFA? Or does it give you not

OK, so, probably an ignorant question, but here I go anyway: What, exactly, does "turning off IDFA" do? Does it send just a dummy IDFA? Or does it give you nothing at all? Why is rotating it periodically better? (I'm assuming rotation is better because that is what Mozilla is apparently recommending.)

saagarjha 7y ago
It sends a zeroed out identifier: https://developer.apple.com/documentation/adsupport/asidentifiermanager/1614151-advertisingidentifier https://developer.apple.com/documentation/adsupport/asidenti...
antsar 7y ago
> I'm assuming rotation is better because that is what Mozilla is apparently recommending. I'm (cynically) assuming something different. Was "monthly" chosen by accident, or is that just enough time for advertisers to connect/correlate activity from two different IDFAs? Mozilla has big-dollar deals with the ad industry (namely, Google). Perhaps they want to appear pro-privacy while really throwing a softball?
zie 7y ago
"When Limit Ad Tracking is enabled on iOS 10 or later, the Advertising Identifier is replaced with a non-unique value of all zeros to prevent the serving of targeted ads. It is automatically reset to a new random identifier if you disable Limit Ad Tracking." From: https://support.apple.com/en-us/HT205223 https://support.apple.com/en-us/HT205223