Apple Releases Safari Technology Preview 129 With Bug Fixes and Performance Improvements

Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the ‌Safari Technology Preview‌ to test features that may be introduced into future release versions of Safari.

Safari Technology Preview Feature
‌Safari Technology Preview‌ release 129 includes bug fixes and performance improvements for Web Inspector, CSS, Scrolling, Rendering, WebAssembly, Web API, Platform Features, IndexedDB, Media, WebGL, and WebCrypto.

Apple says that on macOS Big Sur, this release requires enabling the GPU Process: Media option from the Experimental Features setting in the Develop menu. Turning on the option addresses issues with streaming services.

The current ‌Safari Technology Preview‌ release is built on the new Safari 15 update included in macOS Monterey, and as such, it includes several Safari 15 features. There's a new streamlined tab bar with support for Tab Groups to organize tabs, along with improved support for Safari Web Extensions.

Live Text allows users to select and interact with text in images on the web, but the ‌macOS Monterey‌ beta and an M1 Mac is required. There's also Quick Notes support for adding links and Safari highlights to remember important information and ideas.

Other updates include WebGL 2 and new HTML, CSS, and JavaScript features.

The new ‌Safari Technology Preview‌ update is available for both ‌macOS Big Sur‌ and ‌macOS Monterey‌, the newest version of the Mac operating system that's set to release this fall.

The ‌Safari Technology Preview‌ update is available through the Software Update mechanism in System Preferences to anyone who has downloaded the browser. Full release notes for the update are available on the Safari Technology Preview website.

Apple's aim with ‌Safari Technology Preview‌ is to gather feedback from developers and users on its browser development process. ‌Safari Technology Preview‌ can run side-by-side with the existing Safari browser and while designed for developers, it does not require a developer account to download.

Top Rated Comments

diamondsw Avatar
8 weeks ago
Am I the only one who uses the Favorites Bar? It looks really bizarre being under the tab bar now.

Attachment Image
Score: 6 Votes (Like | Disagree)
ericfroemling Avatar
8 weeks ago

Looks like they removed the option to use the new combined layout for tab bar. The tab bar is always separate in this release.
It looks like it's just been moved to Preferences -> Tabs instead of being under the View menu.
Score: 2 Votes (Like | Disagree)
jabbr Avatar
8 weeks ago

Weird thing is that my setting was reset after updating, since I was using the compact.
Yeah, makes we wonder if they will completely ditch the idea upon release. I hope not... I like the little bit of extra vertical space.
Score: 2 Votes (Like | Disagree)
chucker23n1 Avatar
8 weeks ago
The release notes no longer say that tab groups don’t sync.

But, it looks like tab groups don’t sync.
Score: 2 Votes (Like | Disagree)
abhibeckert Avatar
8 weeks ago

I really want to use Safari but no chromium engine kills it for me. I'm not saying you should use Chrome, just a chromium browser: Brave, Edge etc. Firefox is slow on some sites, while chromium browsers are fast.
And every test I've ever seen shows Safari browsers are faster. As someone who uses both, that's been my experience too. It's a noticeable difference.


Also Chrome is not the battery enemy it used to be. Lots of improvements the last couple of months
Forbes ran an article from earlier this year showing Chrome with an "Energy Impact" number 10x higher than Safari. It also mentioned the test device (M1 MacBook Pro) gets warm running Chrome but stays cold with Safari... which means Chrome is likely pushing the CPU hard enough that it will drop the clock speed to manage temperatures on some hardware. When that happens it will start getting *really* slow (I'm guessing this is why Chrome feels noticeably slower than Safari for me).

I'm sure Chrome has improved, they're working on it continuously, but I doubt it's improved that much.

And Safari isn't sitting still either. Safari 15 is even faster and uses less power than Safari 14.
Score: 2 Votes (Like | Disagree)
jabbr Avatar
8 weeks ago
it's still in the preferences under Tabs.

Attachment Image
Score: 1 Votes (Like | Disagree)

Top Stories

Safari Technology Preview Feature

Apple Releases Safari Technology Preview 130 With Bug Fixes and Performance Improvements

Wednesday August 18, 2021 11:03 am PDT by
Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari. Safari Technology Preview release 130 includes bug fixes and performance improvements for Web Inspector, CSS, JavaScript, Media, Web API, and ...
Safari Technology Preview Feature

Apple Releases Safari Technology Preview 132 With Bug Fixes and Performance Improvements

Thursday September 16, 2021 2:24 pm PDT by
Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari. Safari Technology Preview release 132 includes bug fixes and performance improvements for Web Inspector, CSS, JavaScript, Web API, WebRTC,...
Safari Technology Preview Feature

Apple Releases Safari Technology Preview 131 With Bug Fixes and Performance Improvements

Wednesday September 1, 2021 10:33 am PDT by
Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari. Safari Technology Preview release 131 includes bug fixes and performance improvements for Web Inspector, CSS, Web API, JavaScript, Platform...
Safari Technology Preview Feature

Apple Releases Safari Technology Preview 127 With Bug Fixes and Performance Improvements

Thursday July 1, 2021 6:47 pm PDT by
Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari. Safari Technology Preview release 127 includes bug fixes and performance improvements for CSS, Scrolling, JavaScript, Media, WebRTC, WebAPI,...
Safari Technology Preview Feature

Apple Releases Safari Technology Preview 128 With Bug Fixes and Performance Improvements

Wednesday July 21, 2021 4:36 pm PDT by
Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari. Safari Technology Preview release 128 includes bug fixes and performance improvements for Web Inspector, CSS, JavaScript, Live Text, Media,...
Safari Technology Preview Feature

Apple Releases Safari Technology Preview 126 With macOS Monterey Features

Thursday June 17, 2021 10:50 am PDT by
Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari. The current Safari Technology Preview release is built on the new Safari 15 update included in macOS Monterey, and as such, it includes...
Safari Technology Preview Feature

Apple Releases Safari Technology Preview 125 With Bug Fixes and Performance Improvements

Wednesday May 26, 2021 12:14 pm PDT by
Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari. Safari Technology Preview release 125 includes bug fixes and performance improvements for Web Inspector, CSS, Web Animations, WebAssembly,...
Safari Technology Preview Feature

Apple Releases Safari Technology Preview 124 With Bug Fixes and Performance Improvements

Friday May 7, 2021 1:38 pm PDT by
Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari. Safari Technology Preview release 124 includes bug fixes and performance improvements for Web Inspector, CSS, JavaScript, Web API, Rendering, ...
Safari Technology Preview Feature

Apple Releases Safari Technology Preview 123 With Bug Fixes and Performance Improvements

Wednesday March 31, 2021 10:56 am PDT by
Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari. Safari Technology Preview release 123 includes bug fixes and performance improvements for Web Inspector, CSS, and Web API. The current...
Safari Technology Preview Feature

Apple Releases Safari Technology Preview 121 With Bug Fixes and Performance Improvements

Thursday February 25, 2021 1:32 pm PST by
Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari. Safari Technology Preview release 121 includes bug fixes and performance improvements for Web Inspector, CSS, GPU Process, Media, Web API,...