Apple Releases Safari Technology Preview 20 With Bug Fixes and Feature Improvements - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Releases Safari Technology Preview 20 With Bug Fixes and Feature Improvements

by

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

Safari Technology Preview release 20 includes bug fixes and updates for Visual Viewport, Touch Bar, JavaScript, Web API, Security, CSS, Pointer Lock, Web Inspector, WebCrypto API, and more.

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

Apple's goal with Safari Technology Preview is to receive 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

mdriftmeyer Avatar
129 months ago
Wish Apple spent this much effort developing their operating systems.
This overhaul is several years in the making. The underlying WebKit2 improvements naturally gets extended within OS X/macOS Sierra which both benefit from it.

You also have to take into account that the entire platform has parallel teams working on moving the platform to Swift 4.x.
[doublepost=1482348735][/doublepost]
Looks like mainly peering (WebRTC etc) isn't passing the tests and that section is weighted quite heavily it seems.
It's worth noting that the tests aren't much more than feature detection, so early implementations of features that HTML5Test weights very heavily could cause the score to move drastically between versions, even if the progress of the feature implementation hasn't changed much.
Could also be a gnarly regression issue, but this is a preview/beta browser so not a big deal.
I'm mostly just guessing here though.
There were three changes to WebRTC but the code is there. I'm guessing those changes are what makes this cursory feature test matrix fail.
Score: 2 Votes (Like | Disagree)
JoshDoug Avatar
129 months ago
Uh, 419 out of 555 on html5test.

How have we gone down from 452 in version 19?
Looks like mainly peering (WebRTC etc) isn't passing the tests and that section is weighted quite heavily it seems.
It's worth noting that the tests aren't much more than feature detection, so early implementations of features that HTML5Test weights very heavily could cause the score to move drastically between versions, even if the progress of the feature implementation hasn't changed much.
Could also be a gnarly regression issue, but this is a preview/beta browser so not a big deal.
I'm mostly just guessing here though.
Score: 2 Votes (Like | Disagree)
129 months ago
Wish Apple spent this much effort developing their operating systems.
Score: 2 Votes (Like | Disagree)
129 months ago
Wish Apple spent this much effort developing their operating systems.
Their OS is pretty good. I think you mean their Mac Pro lineup.

But, Apple really needs to sort out their stupid "ecosystem" of Account ID logins for every new service they offer. Why can't we get a single sign-on for iTunes, App Store, iCloud, etc.?

There are permissions issues on iOS - like my wifes account has apps that she downloaded but are under my ownership (because iTunes screwed up backups). I've been talking with them for months about this...still nothing resolved. Permissions and ownership of apps having issues can not be tolerated...
Score: 1 Votes (Like | Disagree)
129 months ago
Any news on Safari support for WebRTC?
Score: 1 Votes (Like | Disagree)
129 months ago
Or any other Apple apps like Mail, iWorks, etc.
Or at least half this effort in building new iMacs and MacPro's....
Score: 1 Votes (Like | Disagree)

Popular Stories

Safari Technology Preview Updated Feature 1

Apple Releases Safari Technology Preview 256 With Bug Fixes and Performance Improvements

Wednesday November 4, 2026 4:21 pm PST by
Apple today released a new update for Safari Technology Preview, the experimental browser that was first introduced in March 2016. Apple designed Safari Technology Preview to allow users to test features that are planned for future release versions of the Safari browser. Safari Technology Preview 256 includes fixes and updates for Accessibility, Animations, CSS, Editing, Forms, HTML,...
duo aquarium

More Fun iPhone Duo Apps: 30 New Picks to Try

Friday November 6, 2026 3:27 pm PST by
When the iPhone Duo launched, we shared a list of some of the fun apps developers created for the new form factor. Two weeks out, developers are continuing to come up with fresh ideas, so we thought we'd share some of our favorites. Games Marbles Unhinged ($2.99) - Marbles Unhinged is a marble maze designed for the Duo. When you fold it, the floor turns into a ramp. If you stand the top...
apple pro tell logo

Apple Launching Five New Products Today

Thursday November 5, 2026 12:59 am PST by
Apple is launching five new products on Friday, November 6, following pre-orders that opened last week, including its first touchscreen MacBook Pro models. The following new products will be available from today: iPad mini with OLED display and A20 Pro chip iMac with M6 chip 14-inch MacBook Pro with M6 chip 14-inch MacBook Pro with OLED touchscreen 16-inch MacBook Pro with OLED...
Latest Stories
Apple Store Subscription Sign-Up Controversy Exposed
Apple Store Subscription Sign-Up Controversy Exposed
6 hours ago
Siri AI Rumored to Become 'More Like an Agent' as Early as Next Year
Siri AI Rumored to Become 'More Like an Agent' as Early as Next Year
16 hours ago
Apple Taking New Approach to Developing iOS 28 and macOS 28
Apple Taking New Approach to Developing iOS 28 and macOS 28
18 hours ago
Early Apple Black Friday Deals on Apple Watch, MacBook Air, and More
Early Apple Black Friday Deals on Apple Watch, MacBook Air, and More
2 days ago
'Backglow' Lets You Customize New MacBook Pro's Glowing Apple Logo
'Backglow' Lets You Customize New MacBook Pro's Glowing Apple Logo
2 days ago
Top Stories: Apple Product Launches, iOS 27.3 Beta, and More
Top Stories: Apple Product Launches, iOS 27.3 Beta, and More
2 days ago
More Fun iPhone Duo Apps: 30 New Picks to Try
More Fun iPhone Duo Apps: 30 New Picks to Try
2 days ago
Hands-On With Apple's New OLED Touchscreen MacBook Pro
Hands-On With Apple's New OLED Touchscreen MacBook Pro
3 days ago
Apple Store With All-New Design Opening Soon in Southern California
Apple Store With All-New Design Opening Soon in Southern California
3 days ago
Control the Glowing Apple Logo on Your New MacBook Pro
Control the Glowing Apple Logo on Your New MacBook Pro
3 days ago
Apple Shares New 'Apple Card: Apply and Use in Minutes' Ad
Apple Shares New 'Apple Card: Apply and Use in Minutes' Ad
3 days ago
Apple Says More Than 100,000 Apps Optimized for iPhone Duo, Here's What's Still Missing
Apple Says More Than 100,000 Apps Optimized for iPhone Duo, Here's What's Still Missing
3 days ago
Early Black Friday Deals Kickoff With Steep Discounts on Apple Watch Ultras and More
Early Black Friday Deals Kickoff With Steep Discounts on Apple Watch Ultras and More
3 days ago
The MacRumors Show: iOS 27.3 Looks Like a Huge Update
The MacRumors Show: iOS 27.3 Looks Like a Huge Update
3 days ago
Best Buy's Black Friday Event Begins With Sitewide Savings on Apple, TVs, More
Best Buy's Black Friday Event Begins With Sitewide Savings on Apple, TVs, More
3 days ago
Apple Releasing Yet Another Two New Products Next Week
Apple Releasing Yet Another Two New Products Next Week
3 days ago
MacBook Air Drops to Lowest Price in Months With Amazon's $250 Discount
MacBook Air Drops to Lowest Price in Months With Amazon's $250 Discount
3 days ago
Apple Rumored to Drop the iPhone's Action Button Next Year
Apple Rumored to Drop the iPhone's Action Button Next Year
3 days ago
Apple's Extended Return Policy Now in Effect for 2026 Holiday Season
Apple's Extended Return Policy Now in Effect for 2026 Holiday Season
3 days ago
Apple Music Classical Updated With New Icon and Refreshed Design
Apple Music Classical Updated With New Icon and Refreshed Design
3 days ago
OLED iPad Mini, M6 iMac, and New MacBook Pros Available From Today
OLED iPad Mini, M6 iMac, and New MacBook Pros Available From Today
3 days ago
Apple Surveys iPhone Duo Buyers About Crease and Camera
Apple Surveys iPhone Duo Buyers About Crease and Camera
3 days ago
Apple's First Touchscreen Mac is Now Arriving to Customers
Apple's First Touchscreen Mac is Now Arriving to Customers
3 days ago
Claude Gets Personal Finance Feature With Bank Account Linking
Claude Gets Personal Finance Feature With Bank Account Linking
3 days ago
Apple Arcade Adds Crossy Road Rush and NBA 2K27
Apple Arcade Adds Crossy Road Rush and NBA 2K27
4 days ago
Apple's New HomeView Smart Home Hub: Here's How Much RAM It Has
Apple's New HomeView Smart Home Hub: Here's How Much RAM It Has
4 days ago
iPad Mini vs. iPad Air Buyer's Guide: Now Just $50 Apart
iPad Mini vs. iPad Air Buyer's Guide: Now Just $50 Apart
4 days ago
First iOS 27.3 and macOS Golden Gate 27.3 Public Betas Now Available
First iOS 27.3 and macOS Golden Gate 27.3 Public Betas Now Available
4 days ago
Apple Announces a New Mac Sales Record
Apple Announces a New Mac Sales Record
4 days ago
Paid $200 for Logic Pro? Apple Says You Won't Get This New Feature
Paid $200 for Logic Pro? Apple Says You Won't Get This New Feature
4 days ago