---
title: Safari Technology Preview 32 Release Notes
framework: safari-technology-preview-release-notes
role: article
role_heading: Article
path: safari-technology-preview-release-notes/stp-release-32
---

# Safari Technology Preview 32 Release Notes

Preview the latest Safari and web technology updates including: Auto-Play improvements, WebAssembly, WebRTC, and Media Capture.

## Overview

Overview Safari Technology Preview Release 32 is now available for download for macOS Sierra. With this release, Safari Technology Preview is now available for betas of macOS High Sierra. If you already have Safari Technology Preview installed, you can update from the Mac App Store’s Updates tab. This release covers the same revisions of WebKit from Safari Technology Preview 31 , but includes new Safari and WebKit features that will be present in Safari 11. The following web-facing Safari 11 features are new to Safari Technology Preview 32: WebRTC and Media Capture Safari now supports peer-to-peer video conferencing through webRTC. For more information, take a look at “Announcing WebRTC and Media Capture”. WebAssembly WebAssembly is a low-level binary format for executable code on the web. It is a standards-based supplement to JavaScript. It is secure, portable, and designed to be fast and efficient. To learn more about what WebAssembly is, and what it isn’t, see “Assembling WebAssembly”. Auto-Play Improvements Safari prevents auto-play of media with sound on most websites. Users can control which websites are allowed to auto-play video and audio by opening the new “Websites” preferences pane, or through the “Settings for This Website…” option in the Safari Technology Preview menu. We recommended that web developers test their websites with these new behaviors, ensuring any custom media controls behave correctly when auto-play is disabled, either automatically or by the user. Many more WebKit features in Safari 11 are present in this release of Safari Technology Preview and have been in past releases. You can learn more about what’s new in Safari 11 from the Apple Developer website.

## See Also

### 2017

- [Safari Technology Preview 46 Release Notes](safari-technology-preview-release-notes/stp-release-46.md)
- [Safari Technology Preview 45 Release Notes](safari-technology-preview-release-notes/stp-release-45.md)
- [Safari Technology Preview 44 Release Notes](safari-technology-preview-release-notes/stp-release-44.md)
- [Safari Technology Preview 43 Release Notes](safari-technology-preview-release-notes/stp-release-43.md)
- [Safari Technology Preview 42 Release Notes](safari-technology-preview-release-notes/stp-release-42.md)
- [Safari Technology Preview 41 Release Notes](safari-technology-preview-release-notes/stp-release-41.md)
- [Safari Technology Preview 40 Release Notes](safari-technology-preview-release-notes/stp-release-40.md)
- [Safari Technology Preview 39 Release Notes](safari-technology-preview-release-notes/stp-release-39.md)
- [Safari Technology Preview 38 Release Notes](safari-technology-preview-release-notes/stp-release-38.md)
- [Safari Technology Preview 37 Release Notes](safari-technology-preview-release-notes/stp-release-37.md)
- [Safari Technology Preview 36 Release Notes](safari-technology-preview-release-notes/stp-release-36.md)
- [Safari Technology Preview 35 Release Notes](safari-technology-preview-release-notes/stp-release-35.md)
- [Safari Technology Preview 34 Release Notes](safari-technology-preview-release-notes/stp-release-34.md)
- [Safari Technology Preview 33 Release Notes](safari-technology-preview-release-notes/stp-release-33.md)
- [Safari Technology Preview 31 Release Notes](safari-technology-preview-release-notes/stp-release-31.md)