that manufacturers must disclose to customers if used in articles in their products above 0.1% by weight. Based on the current version of the candidate list...
https://www.apple.com/jp/environment/pdf/Apple_REACH_SVHC_Disclosure.pdf
a simplified version of the system configuration to trackers so more devices look identical, making it harder to single one out. And unlike some other brows...
https://www.apple.com/jp/safari/docs/Safari_White_Paper_Nov_2019.pdf