**Safari**is the default browser in iOS. It includes [privacy features](https://support.apple.com/guide/iphone/browse-the-web-privately-iphb01fc3c85/15.0/ios/15.0) such as tracking protection, isolated private tabs, iCloud Private Relay to hide your IP address from trackers, and automatic https upgrade.
The synchronization of data is [not](https://support.apple.com/en-us/HT202303) end-to-end encrypted. Safari only encrypts Safari Bookmarks in transit and stores in an encrypted format. As the service is not end-to-end encrypted Apple may be able to decrypt and access bookmarks.
We generally do not recommend installing [any extensions](https://www.sentinelone.com/blog/inside-safari-extensions-malware-golden-key-user-data/) as they increase your browser's [attack surface](https://en.wikipedia.org/wiki/Attack_surface); however, if you want content blocking, [AdGuard for Safari](/browsers/#additional-resources) might be useful to you.