Sorry, did you read Mozilla's blog post or aware of what IDFA is and it's history?
Apple released IDFA to improve consumer privacy, to avoid advertisers being able to fingerprint iOS devices using Unique Device ID (UDID).
Access to UDID was deprecated in iOS 5 (that's 2011).
It has also given control to consumers since then to opt-out of providing IDFA by default.
In 2019, Mozilla asked Apple to take rotate the IDFA every month.
But Apple has taken it even further, which Mozilla publicly applauded https://foundation.mozilla.org/en/blog/applause-for-apples-i...
Apple is now making IDFA disabled by default and requiring users to enable it if they want to.
> Apple went even further than what Mozilla supporters had asked for when it announced that it will give consumers the option to opt-out of tracking in each app, essentially turning off IDFA and giving millions of consumers more privacy online.