Safari Privacy Overview 
 Safari Privacy Overview Learn how the Safari web browser protects your privacy. November 2019 Introduction 3。

https://www.apple.com/jp/safari/docs/Safari_White_Paper_Nov_2019.pdf

browser or an app running on another platform, Apple is not able to provide an equivalent to the local refresh API. Therefore, developers will need to make ...

https://www.apple.com/jp/privacy/docs/Sign_in_with_Apple_White_Paper_Nov_2019.pdf