of their devices, view location, text messages and contacts, steal users’ login credentials, and make changes to users’ phones.12,13,14 Others have been use...

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

or more trackers from different companies on a single page. 
 Safari Privacy Overview | November 2019 3 Key Safari Privacy Features Intelligent Tracking Pre...

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