---
title: Safari 13.1 Release Notes
framework: safari-release-notes
role: article
role_heading: Article
path: safari-release-notes/safari-13_1-release_notes
---

# Safari 13.1 Release Notes

Released March 24, 2020 — Version 13.1 (15609.1.20)

## Overview

Overview Safari 13.1 ships with iOS 13.4 and macOS 10.15.4. It’s also available for macOS 10.14.6 and 10.13.6. General New Features Made significant improvements to the Web Platform Tests pass rate in several components, including CSS, Service Workers, SVG, and Fetch. Added Close Tabs to the Right. Added Duplicate Tab. Added support for bundled content blockers in Mac apps built with Mac Catalyst. Added support for importing passwords from Google Chrome. Performance New Features Improved the performance speed of IndexedDB operations. Improved back-forward responsiveness. Improved the speed of WebAssembly and JavaScript. Improved the speed of JavaScript Promises. Made media query updates more efficient. Reduced the startup time of Service Workers. Privacy New Features Prevented several potential approaches to circumventing Intelligent Tracking Prevention. Added cookie blocking for all cross-site resources by default. Security New Features Added the “Not Secure” warning for sites using TLS 1.1 and 1.0. Fixed many bugs identified by fuzz testing. JavaScript New Features Added support for the nullish coalescing operator ??. Added support for the String.prototype.replaceAll method. Web API New Features Added support for Web Animations. Added support for the Async Clipboard API. Added support for GenericCue. Added support for Resize Observer. Added support for HDR video using the Media Capabilities API. Added support for the Remote Playback API. Added support for the Picture-in-Picture API. WebRTC New Features Added support for DTMF codec and proxies. HTML New Features Added support for the enterkeyhint attribute. Web Components New Features Added support for CSS Shadow Parts. CSS New Features Added support for font keywords: ui-serif, ui-sans-serif, ui-monospace, ui-rounded. Added support for the line-break: anywhere; property value. Added support for the dynamic-range media query. Web Inspector New Features Added a new Sources tab that combines Resources and Debugger. Added a new Layers tab. Added support for bootstrap scripts and local resource overrides in the Sources tab. Added script black boxing in the Settings tab. Redesigned color choosing in the Styles sidebar with support for wide gamut colors. Added a new CSS Animation/Transition timeline in the Timelines tab.

## See Also

### Version 13

- [Safari 13 Release Notes](safari-release-notes/safari-13-release-notes.md)