Release Notes for Safari Technology Preview 139

Safari Technology Preview Release 139 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

Release Notes for Safari Technology Preview 137

Safari Technology Preview Release 137 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

New WebKit Features in Safari 15.2

The internet has always been about communication and collaboration. It started with asynchronous messages made of text. As it matured, the internet became real-time. Then the web came along, adding images, and later, video. Websites provided a means ... more

Release Notes for Safari Technology Preview 136

Safari Technology Preview Release 136 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

Release Notes for Safari Technology Preview 135

Safari Technology Preview Release 135 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

Release Notes for Safari Technology Preview 134

Safari Technology Preview Release 134 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

New WebKit Features in Safari 15

With the release of Safari 15 for macOS Monterey, iPadOS 15, iOS 15, and watchOS, as well as macOS Big Sur and macOS Catalina, WebKit brings significant advancements in privacy and security, improved interoperability, and a host of new features for web ... more

Release Notes for Safari Technology Preview 133

Safari Technology Preview Release 133 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

Release Notes for Safari Technology Preview 132

Safari Technology Preview Release 132 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

Release Notes for Safari Technology Preview 131

Safari Technology Preview Release 131 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

Release Notes for Safari Technology Preview 130

Safari Technology Preview Release 130 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

Release Notes for Safari Technology Preview 129

Safari Technology Preview Release 129 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

PCM: Click Fraud Prevention and Attribution Sent to Advertiser

Earlier this year, Safari was the first browser to ship a proposed web standard for measuring advertising in a privacy-preserving way – Private Click Measurement, or PCM. Today we’re happy to announce three major updates to PCM, available in our iOS/iPadOS ... more

Optimizing JavaScript Standard Library Functions in JSC

After three years working on JavaScriptCore (JSC), I recently had the opportunity to work on optimizing one of our standard library functions for the first time. I thought it’d be interesting to share what I learned about how they work in JSC and how ... more

Release Notes for Safari Technology Preview 128

Safari Technology Preview Release 128 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

Release Notes for Safari Technology Preview 127

Safari Technology Preview Release 127 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This ... more

Release Notes for Safari Technology Preview 126 with Safari 15 Features

Safari Technology Preview Release 126 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. Many ... more

WebKit Features in Safari at WWDC21

There’s a lot of news coming out of WWDC21 about WebKit and the web technology that’s shipping in Safari 15 on Apple’s platforms. Many of the new features were announced on Monday, at this year’s WWDC21 Keynote, and listed in the Safari 15 Beta Release ... more

Release Notes for Safari Technology Preview 124

Safari Technology Preview Release 124 is now available for download for macOS Big Sur and macOS Catalina. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This release ... more

New WebKit Features in Safari 14.1

Safari 14.1 for macOS Big Sur, iPadOS 14.5, and iOS 14.5 brings new WebKit features, APIs, performance improvements, and improved compatibility for web developers. Take a look. Flexbox Gap Support Safari 14.1 now supports the gap property inside Flexbox ... more

Release Notes for Safari Technology Preview 123

Note: The original end revision for this release was incorrect. These release notes have been updated for the set of changes included in the corrected revision range. Safari Technology Preview Release 123 is now available for download for macOS Big Sur ... more

Release Notes for Safari Technology Preview 122

Safari Technology Preview Release 122 is now available for download for macOS Big Sur and macOS Catalina. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This release ... more

Release Notes for Safari Technology Preview 121

Safari Technology Preview Release 121 is now available for download for macOS Big Sur and macOS Catalina. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This release ... more

Release Notes for Safari Technology Preview 120

Safari Technology Preview Release 120 is now available for download for macOS Big Sur and macOS Catalina. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This release ... more

Introducing Private Click Measurement, PCM

This blog post covers a new feature called Private Click Measurement, or PCM, for measuring ad clicks across websites and from iOS apps to websites. It is part of iOS and iPadOS 14.5 betas. Motivation and Goals Classic ad attribution on the web is done ... more

Release Notes for Safari Technology Preview 119

Safari Technology Preview Release 119 is now available for download for macOS Big Sur and macOS Catalina. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This release ... more

Release Notes for Safari Technology Preview 118

Safari Technology Preview Release 118 is now available for download for macOS Big Sur and macOS Catalina. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This release ... more

Release Notes for Safari Technology Preview 117

Safari Technology Preview Release 117 is now available for download for macOS Big Sur and macOS Catalina. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This release ... more

Release Notes for Safari Technology Preview 116

Safari Technology Preview Release 116 is now available for download for macOS Big Sur and macOS Catalina. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS. This release ... more

New WebKit Features in Safari 14

With the release of Safari 14 for macOS Big Sur, iPadOS 14, iOS 14, and watchOS 7, WebKit brings significant improvements to performance and privacy along with a host of new features for web developers. Take a look at all of the improvements WebKit is ... more