---
title: Safari 26.6 Release Notes
framework: Safari Release Notes
role: article
role_heading: Article
path: safari-release-notes/safari-26_6-release-notes
---

# Safari 26.6 Release Notes

Released July 27, 2026 — 26.6 (20624.4.5)

## Overview

Overview Safari 26.6 is available for iOS 26.6, iPadOS 26.6, visionOS 26.6, macOS 26.6, macOS Sequoia, and macOS Sonoma. CSS Resolved Issues Fixed an issue where the ic length unit scaled incorrectly with page zoom, causing it to no longer equal 1em as expected by the CSS specification. (174857144) Fixed an issue where fixed-positioned elements using position-area did not fall back properly when the body was scrollable. (175544079) Fixed an issue where CSS zoom interacted incorrectly with font-size, font-weight, font-variant, and font-style on iPad when requesting the desktop website. (176647969) Networking Resolved Issues Fixed an issue where partitioned cookies could not be deleted using WKHTTPCookieStore. (176097960) Service Workers Resolved Issues Fixed an issue where service worker registrations with missing main scripts were not automatically unregistered, preventing pages from re-registering new service workers. (175522651) Fixed an issue where service worker registrations with missing imported scripts were not automatically unregistered. (175522816) Web Extensions Resolved Issues Fixed an issue where web extension service worker registration database files accumulated on each Safari launch, causing performance degradation. (175810627) WebAssembly New Features Added compileOptions parameter to WebAssembly.compileStreaming and WebAssembly.instantiateStreaming for JS String Builtins support. (174858653) WebRTC Resolved Issues Fixed an issue where RTCPeerConnection configured with iceTransportPolicy: "relay" failed to gather any ICE candidates on macOS Sequoia. (175009190)

## See Also

### Version 26

- [Safari 26.5 Release Notes](safari-release-notes/safari-26_5-release-notes.md)
- [Safari 26.4 Release Notes](safari-release-notes/safari-26_4-release-notes.md)
- [Safari 26.3 Release Notes](safari-release-notes/safari-26_3-release-notes.md)
- [Safari 26.2 Release Notes](safari-release-notes/safari-26_2-release-notes.md)
- [Safari 26.1 Release Notes](safari-release-notes/safari-26_1-release-notes.md)
- [Safari 26.0 Release Notes](safari-release-notes/safari-26-release-notes.md)