Release Notes for Safari Technology Preview 198

Safari Technology Preview Release 198 is now available for download for macOS Sequoia beta 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 ... more

Release Notes for Safari Technology Preview 197

Safari Technology Preview Release 197 is now available for download for macOS Sequoia beta 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 ... more

News from WWDC24: WebKit in Safari 18 beta

The last year has been a great one for WebKit. After unveiling Safari 17 beta at WWDC23, we’ve shipped six releases of Safari 17.x with a total of 200 new web technologies. And we’ve been hard at work on multiple architectural improvement projects that ... more

Improving Web Accessibility with Web Platform Tests

Last year, a colleague introduced me to the Interop Accessibility project. I immediately resonated with its charge to “improve the state of accessibility across the entire web, regardless of which platform, browser, or assistive technology.” The project’s ... more

Safari Technology Preview 196 Release Notes

Safari Technology Preview Release 196 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

WebKit Features in Safari 17.5

Happy May! It’s time for another release of Safari — our third significant update of 2024. With just a month until WWDC24 and the unveiling of what’s coming later this year, we are happy to get these 7 features and 22 bug fixes into the hands of your ... more

WebKit Features in Safari 17.5

Happy May! It’s time for another release of Safari — our third significant update of 2024. With just a month until WWDC24 and the unveiling of what’s coming later this year, we are happy to get these 7 features and 22 bug fixes into the hands of your ... more

Release Notes for Safari Technology Preview 194

Safari Technology Preview Release 194 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

Release Notes for Safari Technology Preview 194

Safari Technology Preview Release 194 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

JetStream 2.2

JetStream 2 is a suite of JavaScript and WebAssembly performance benchmarks that runs 64 subtests. We recently fixed several minor issues we discovered that impact running the benchmark. One issue happened when running JetStream on fast hardware where ... more

JetStream 2.2

JetStream 2 is a suite of JavaScript and WebAssembly performance benchmarks that runs 64 subtests. We recently fixed several minor issues we discovered that impact running the benchmark. One issue happened when running JetStream on fast hardware where ... more

Release Notes for Safari Technology Preview 193

Safari Technology Preview Release 193 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

Release Notes for Safari Technology Preview 193

Safari Technology Preview Release 193 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

Help us invent CSS Grid Level 3, aka “Masonry” layout

If you’ve been making websites for years, you know how frustrating it was to lay out a web page with CSS floats. Managing sizes and placement was tedious and time consuming. Being creative was often impossible. CSS Grid greatly eased that pain with Grid ... more

Help us invent CSS Grid Level 3, aka “Masonry” layout

If you’ve been making websites for years, you know how frustrating it was to lay out a web page with CSS floats. Managing sizes and placement was tedious and time consuming. Being creative was often impossible. CSS Grid greatly eased that pain with Grid ... more

Release Notes for Safari Technology Preview 192

Safari Technology Preview Release 192 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

Release Notes for Safari Technology Preview 192

Safari Technology Preview Release 192 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

Optimizing WebKit & Safari for Speedometer 3.0

The introduction of Speedometer 3.0 is a major step forward in making the web faster for all, and allowing Web developers to make websites and web apps that were not previously possible. In this article, we explore ways the WebKit team made performance ... more

Optimizing WebKit & Safari for Speedometer 3.0

The introduction of Speedometer 3.0 is a major step forward in making the web faster for all, and allowing Web developers to make websites and web apps that were not previously possible. In this article, we explore ways the WebKit team made performance ... more

Release Notes for Safari Technology Preview 191

Safari Technology Preview Release 191 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

Release Notes for Safari Technology Preview 191

Safari Technology Preview Release 191 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

Speedometer 3.0: The Best Way Yet to Measure Browser Performance

As announced on browserbench.org today, in collaboration with other browser engine developers, Apple’s WebKit team is excited to introduce Speedometer 3.0, a major update that better reflects the Web of today. It’s built together by the developers of ... more

Speedometer 3.0: The Best Way Yet to Measure Browser Performance

As announced on browserbench.org today, in collaboration with other browser engine developers, Apple’s WebKit team is excited to introduce Speedometer 3.0, a major update that better reflects the Web of today. It’s built together by the developers of ... more

Release Notes for Safari Technology Preview 190

Safari Technology Preview Release 190 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

Release Notes for Safari Technology Preview 190

Safari Technology Preview Release 190 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

WebKit Features in Safari 17.4

Just like Safari 15.4 and Safari 16.4, this March’s release of Safari 17.4 is a significant one for web developers. We’re proud to announce another 46 features and 146 bug fixes. You can experience Safari 17.4 on iOS 17.4, iPadOS 17.4, macOS Sonoma 14.4 ... more

WebKit Features in Safari 17.4

Just like Safari 15.4 and Safari 16.4, this March’s release of Safari 17.4 is a significant one for web developers. We’re proud to announce another 46 features and 146 bug fixes. You can experience Safari 17.4 on iOS 17.4, iPadOS 17.4, macOS Sonoma 14.4, ... more

Release Notes for Safari Technology Preview 189

Safari Technology Preview Release 189 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

Release Notes for Safari Technology Preview 189

Safari Technology Preview Release 189 is now available for download for macOS Sonoma and macOS Ventura. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes ... more

How to use Media Source Extensions with AirPlay

Media Source Extensions (MSE) is a popular way to provide streaming video on the web. It gives JavaScript control of the way bytes are sent to the browser for playback. At the 2023 Worldwide Developer conference, Apple announced a new Managed Media Source ... more