Apple Releases Safari Technology Preview 133 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 133 includes bug fixes and performance improvements for CSS, CSS Cascade Layers, CSS Font Loading API, Accessibility, JavaScript, Web API, WebRTC, Media, WebGL, and Web and App Extensions.

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.

Popular Stories

Glowtime Live Coverage Article 1

Apple Event Live Blog: iPhone 16, Apple Watch 10, and New AirPods!

Monday September 9, 2024 9:21 am PDT by
Apple's "It's Glowtime" event kicks off today at 10:00 a.m. Pacific Time, where we're expecting to see the iPhone 16 lineup and some updated Apple Watch and AirPods models unveiled, and perhaps some other announcements. Apple is providing a live video stream on its website, on YouTube, and in the company's TV app across various platforms. We will also be updating this article with live blog...
16 pro

Apple Announces iPhone 16 Pro and iPhone 16 Pro Max with Larger Displays, New Camera Control, and More

Monday September 9, 2024 11:13 am PDT by
Apple today announced the iPhone 16 Pro and iPhone 16 Pro Max—its latest flagship smartphones—featuring larger displays, an all-new Camera Control button, and the A18 Pro chip. The iPhone 16 Pro has a 6.3-inch display, while the iPhone 16 Pro Max features a 6.9-inch display—the biggest iPhone display ever. The borders around the display are the thinnest of any Apple device. The...
sonny iphone 16 pro colors

New iPhone 16 and iPhone 16 Pro Colors Revealed Ahead of Apple Event

Friday September 6, 2024 5:01 am PDT by
Apple is "shaking up its color palette" for its iPhone 16 lineup this year, according to well-connected Bloomberg reporter Mark Gurman. Early iPhone 16 Pro dummy models via Sonny Dickson According to Gurman, the iPhone 16 Pro models will come in a Gold Titanium to replace Blue Titanium, while the Black, White, and Natural Titanium options that debuted with the iPhone 15 Pro will remain...
iPhone 16 Pro Mock Article

How Much Will the iPhone 16 Cost?

Friday September 6, 2024 5:43 am PDT by
Apple's next-generation iPhone 16 series is expected to launch on September 20 and will compete in a quickly evolving smartphone market, and with some notable upgrades rumored, the new models could see price changes compared to previous years. Successive iPhone models always come with new features and hardware upgrades, but Apple typically does not increase the retail prices as a result....
AirPods Max New Colors 2024

Apple Updates AirPods Max With USB-C Port and New Colors

Monday September 9, 2024 10:36 am PDT by
Apple today announced that the AirPods Max are being updated with a USB-C charging port and new color options, including Midnight, Blue, Purple, Orange, and Starlight. In addition, Apple said the AirPods Max are gaining support for Personalized Spatial Audio with the upcoming iOS 18 software update. The updated AirPods Max will be available to pre-order for $549 starting today, and the...
sequoia

macOS Sequoia Release Likely to Be the Earliest in Years

Sunday September 8, 2024 2:14 am PDT by
macOS Sequoia will be one of the earliest new macOS launches in over a decade, likely releasing within as little as just a week. Internal Apple documentation obtained by MacRumors suggests that macOS 15.0 Sequoia will be officially released to the public by mid-September. The release dates of major macOS updates in recent years are listed below: OS X 10.9 (Mavericks) – October 22,...
Screenshot 2024 09 09 at 6

Apple Announces Thinner Apple Watch Series 10 With Bigger Screen Than Ultra

Monday September 9, 2024 10:11 am PDT by
Apple at its event today announced the Apple Watch Series 10, featuring a wide-angle OLED display that is larger than the Apple Watch Ultra, with the company describing it as the "biggest display and thinnest design ever." The Series 10 is 9.7mm thick, which is nearly 10% thinner than Series 9, and it weighs 20% less than the Stainless Steel Series 9. The Aluminum cases also weigh up to 10%...

Top Rated Comments

nvmls Avatar
39 months ago

Of course it was intentional. That's how all side bars function these days.
Really? make it inferior to previous because "That's how all side bars function these days"? You should send your resume to Apple (unless you dev for them already)
Score: 2 Votes (Like | Disagree)
BWhaler Avatar
39 months ago
Does it remove the trainwreck new design?
Score: 1 Votes (Like | Disagree)
gank41 Avatar
39 months ago

Does it remove the trainwreck new design?
no it does not...
Score: 1 Votes (Like | Disagree)
Cheesehead Dave Avatar
39 months ago
Maybe I'm thinking of something else, but I swear I've been using this since long before 2016.
Score: 1 Votes (Like | Disagree)
elptdbi3lYI Avatar
38 months ago

Yes, that is what I'm referring to, and then that allows you to keep the SideBar open on the Start Page and have it NOT be there when you navigate away to any other page. And yes, the Start Page does show the most recent items from my Reading List, but I tend to go back further than the 12 listings it shows.

I honestly DO like everything else about Safari 15. I like the extensions and I love the new Start Page and all of the available content and how it syncs across everywhere. That's great! But the hate of now having to go thru many steps to scroll through my Reading List just makes it all a wash for me. ?
Not sure if you're aware but there's "Show More" button besides Reading List on start page, which I think shows all of the entries and stays that way.
I find it strange that you like everything else though, personally I can't stand how broken tabs are and that we don't have a fallback to old style.
Score: 1 Votes (Like | Disagree)
gank41 Avatar
38 months ago

Not sure if you're aware but there's "Show More" button besides Reading List on start page, which I think shows all of the entries and stays that way.
I find it strange that you like everything else though, personally I can't stand how broken tabs are and that we don't have a fallback to old style.
Yeah, the whole Tab situation is a mess, too. I use Nitefall ('https://apps.apple.com/us/app/nitefall-dark-mode-for-safari/id1575190591') on macOS and Noir ('https://apps.apple.com/us/app/noir-dark-mode-for-safari/id1581140954') on iOS/iPadOS. That seems to make the Tabs a little more palatable. Plus the whole Dark Mode dealio..

And yes, the Show More option is helpful. But even still, everything in Safari just stays in a small section in the middle instead of being dynamic and using up the rest of the space on the page. It's better than nothing, I guess. But that doesn't have the search feature like it does in the SideBar. Sometimes I need to reference something that's maybe 6-8 months old or older and searching for it is easy- er, was easy.
Score: 1 Votes (Like | Disagree)