Apple has released the fourth beta of iOS & iPadOS 13.3

Overview

The iOS & iPadOS 13.3 SDK provides support for developing apps for iPhone, iPad, and iPod touch devices running iOS & iPadOS 13.3. The SDK comes bundled with Xcode 11.2 available from the Mac App Store. For information on the compatibility requirements for Xcode 11.2, see  Xcode 11.2 Release Notes.

Networking

New Features

• Certain top-level domains (TLDs) such as .dev and .app are now in the Foundation  URLSession and  NSURLConnection HTTP Strict Transport Security (HSTS) preload list. An app which uses  URLSession to visit a matching URL will always navigate to the URL as https://, and never as cleartext http://. See the  HTTP Strict Transport Security (HSTS) Specification for more information about HSTS. (56247242)

Safari

New Features

• Now supports NFC, USB, and Lightning FIDO2-compliant security keys in Safari,  SFSafariViewController, and  ASWebAuthenticationSession using the WebAuthn standard, on devices with the necessary hardware capabilities.

iOS & iPadOS 13.3 Beta 4 Release Notes