---
title: Safari Technology Preview 219 Release Notes
framework: safari-technology-preview-release-notes
role: article
role_heading: Article
path: safari-technology-preview-release-notes/stp-release-219
---

# Safari Technology Preview 219 Release Notes

Learn about the latest web technology updates in Safari Technology Preview: Canvas, CSS, JavaScript, Media, Rendering, Web API, Web Extensions, and WebRTC.

## Overview

Overview Safari Technology Preview Release 219 is now available for download for macOS Sequoia and macOS Sonoma. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes WebKit changes between: 293899@main…294487@main Canvas Resolved Issues Fixed re-drawing a canvas with relative width when the parent element is resized. (294401@main)  (121996660) CSS New Features Added support for the margin-trim: block inline syntax for trimming in both directions. (294190@main)  (141784069) JavaScript Resolved Issues Fixed Array.prototype.pop to throw an exception when the array is frozen. (293907@main)  (141805240) Fixed f() = 1 behavior with other engines when not using strict mode. (293996@main)  (149831750) Media Resolved Issues Fixed SVG images with sub-resources to appear correctly when used in MediaSession. (294334@main)  (148089535) Rendering Resolved Issues Fixed an issue where feMerge incorrectly positioned HTML elements when merging the same feMergeNode multiple times. (294088@main)  (149431216) Fixed an issue in determining when a flex item should be used for percentage resolution during intrinsic width computation. (293901@main)  (149615295) Web API Resolved Issues Fixed an overly broad fullscreen exit trigger by restricting it to only text-entry elements gaining focus, preventing non-text input types from causing unexpected fullscreen exits. (294284@main)  (136726993) Web Extensions Resolved Issues Fixed 'allowAllRequests' for declarativeNetRequest. (294041@main)  (72203692) Fixed a non-fatal webRequest error for non-persistent background content. (294142@main)  (150051544) WebRTC New Features Added support for RTCEncodedAudioFrame and RTCEncodedVideoFrame constructors. (293951@main)  (149541424)

## See Also

### 2025

- [Safari Technology Preview 234 Release Notes](safari-technology-preview-release-notes/stp-release-234.md)
- [Safari Technology Preview 233 Release Notes](safari-technology-preview-release-notes/stp-release-233.md)
- [Safari Technology Preview 232 Release Notes](safari-technology-preview-release-notes/stp-release-232.md)
- [Safari Technology Preview 231 Release Notes](safari-technology-preview-release-notes/stp-release-231.md)
- [Safari Technology Preview 230 Release Notes](safari-technology-preview-release-notes/stp-release-230.md)
- [Safari Technology Preview 229 Release Notes](safari-technology-preview-release-notes/stp-release-229.md)
- [Safari Technology Preview 228 Release Notes](safari-technology-preview-release-notes/stp-release-228.md)
- [Safari Technology Preview 227 Release Notes](safari-technology-preview-release-notes/stp-release-227.md)
- [Safari Technology Preview 226 Release Notes](safari-technology-preview-release-notes/stp-release-226.md)
- [Safari Technology Preview 225 Release Notes](safari-technology-preview-release-notes/stp-release-225.md)
- [Safari Technology Preview 224 Release Notes](safari-technology-preview-release-notes/stp-release-224.md)
- [Safari Technology Preview 223 Release Notes](safari-technology-preview-release-notes/stp-release-223.md)
- [Safari Technology Preview 222 Release Notes](safari-technology-preview-release-notes/stp-release-222.md)
- [Safari Technology Preview 221 Release Notes](safari-technology-preview-release-notes/stp-release-221.md)
- [Safari Technology Preview 220 Release Notes](safari-technology-preview-release-notes/stp-release-220.md)