Apple Releases Safari Technology Preview 110 With Bug Fixes and Performance Improvements - MacRumors
Skip to Content

Apple Releases Safari Technology Preview 110 With Bug Fixes and Performance Improvements

safaripreviewiconApple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced four years ago 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 110 includes bug fixes and performance improvements for WebRTC, Web Authentication, Web Animations, Web API, Media, CSS, Layout, Rendering, Accessibility, JavaScript, Storage Access API, Text Manipulation, Security, and Web Inspector.

The current ‌Safari Technology Preview‌ release is the built on the new Safari 14 update included in macOS Big Sur with support for Safari Web Extensions imported from other browsers, tab previews, password breach notifications, web authentication with Touch ID, and more.

The new ‌Safari Technology Preview‌ update is available for macOS Catalina and macOS Big Sur, the newest version of the Mac operating system that's set to be released 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

M5 MacBook Pro

RIP, MacBook Ultra

Monday October 19, 2026 9:37 am PDT by
Apple today sent out invites for an experience in Los Angeles on Wednesday, October 28, and the "Pro and tell" tagline on the invitation likely means that the rumored MacBook models with touch-enabled OLED displays will stick with MacBook Pro branding instead of the once-rumored "MacBook Ultra" name. The long-rumored "iPhone Ultra" ended up being named iPhone Duo, so speculation that Apple...
iPhone Duo Trio

Here's What Apple's Apps Look Like on the iPhone Duo

Tuesday October 20, 2026 11:12 am PDT by
With just three days to go until the iPhone Duo is released, Apple is getting ready for the launch. Behind the scenes, the App Store now has screenshots of Apple's built-in apps running on the Duo. We've seen some apps in marketing materials, but images of the ones we haven't seen give us an idea of what it will be like using the iPhone Duo day to day. Many apps are shown in landscape...
apple pro tell logo

Apple Announcing New Products Next Week: 'Pro and Tell'

Monday October 19, 2026 9:05 am PDT by
Apple's Greg Joswiak today hinted at new product announcements coming next week, sharing a social media post that says "Can't wait to pro and tell next week." Rumors suggest Apple is planning to debut the new MacBook Pro with an OLED touchscreen display, an M6 entry-level MacBook Pro, an M6 iMac, an iPad mini with an OLED display. Can't wait to pro and tell next week....

Top Rated Comments

82 months ago

They have fixed that annoying bug that caused it to crash whenever you opened a new window. Even though I knew about it I still did it 10 times a day out of habit.
That NEVER happens to me. I’ve been using Safari Technology Preview as my primary browser for over a year now and it very stable.
Score: 5 Votes (Like | Disagree)
82 months ago
I use the regular Safari and the Tech Preview side-by-side for different sites and barely notice a difference. Overall, Safari remains my favourite browser.


They have fixed that annoying bug that caused it to crash whenever you opened a new window. Even though I knew about it I still did it 10 times a day out of habit.
Zero crashes here. Maybe something related to your settings? Do you have it open a particular page? Do you have it remember opened tabs? I don't have any of that... just opens to a blank page, not a site.
Score: 5 Votes (Like | Disagree)
82 months ago
So I tested VP9 support using a website that checks media mime support ('https://cconcolato.github.io/media-mime-support/') and STP release 110 indeed supports VP9 on the browser side. However, YouTube did not load any VP9 video in my limited testing so far. The nice thing is VP9 decoding is provided by VideoToolbox (VT) which can be used by any macOS app (video player, transcoder etc) going forward which is great. Hopefully, they will also expose VP9 encoding functionality in VT as well.




PS: Upon further inspection, they only seem to support VP9 codec inside MP4 container for now, unless I missed something. Most if not all VP9 videos in YouTube seem to use Webm container instead of MP4. However, they seem to support Webm/VP9 on iOS so it might be coming to the macOS in the upcoming STP releases.

Attachment Image

Attachment Image
Score: 4 Votes (Like | Disagree)
82 months ago

They have fixed that annoying bug that caused it to crash whenever you opened a new window. Even though I knew about it I still did it 10 times a day out of habit.
literally, that never happened to me. I am always updated to latest (actually on Big Sur t the moment)


Only Apple would sell 5k iMacs that only support 1080p on YouTube on their native browser. Come on, Apple, it’s 2020!
hmm, YouTube is google, they couldn't possibly be doing anything nefarious, now could they? Don't know technically why this is the case, but chances are google is using proprietary tech
Score: 3 Votes (Like | Disagree)
82 months ago

No kidding, and you even tried on all browsers.
I did. I tried lynx, WorldWideWeb, Netscape 1.0, Omniweb, IE6 etc. All with the express aim of proving you can manage the basic task of pasting a url. Alas, my efforts were in vain. I await another "impressive" and "stable" effort.
Score: 2 Votes (Like | Disagree)
82 months ago

We use every single platform OS.

The bugs are there, it's not a subjective thing.

Have had good words on macOS & Apple several times when credit is due, many examples below.

Good words 1 ('http://%E2%80%8Bhttps%3A//forums.macrumors.com/threads/developers-visual-comparison-of-macos-catalina-and-big-sur-offers-closer-look-at-apples-ui-redesign-for-macs.2244714/post-28648527%E2%80%8B%E2%80%8B%E2%80%8B')
Good words 2 ('http://%E2%80%8Bhttps%3A//forums.macrumors.com/threads/first-look-macos-big-sur-with-redesign-safari-updates-new-messages-app-and-more.2242809/post-28604223%E2%80%8B%E2%80%8B%E2%80%8B')
Good words 3 ('http://%E2%80%8Bhttps%3A//forums.macrumors.com/threads/apples-craig-federighi-highlights-ios-14-and-macos-big-sur-privacy-updates-in-new-interview.2242271/post-28590469%E2%80%8B%E2%80%8B%E2%80%8B')
Good words 4 ('http://%E2%80%8Bhttps%3A//forums.macrumors.com/threads/this-app-is-no-longer-shared-ios-bug-preventing-some-apps-from-opening.2237790/post-28497409%E2%80%8B%E2%80%8B%E2%80%8B')
Good words 5 ('http://%E2%80%8Bhttps%3A//forums.macrumors.com/threads/logic-pro-x-10-5-released-with-live-loops-new-beat-making-tools-and-more.2235476/post-28460460%E2%80%8B%E2%80%8B%E2%80%8B')

We want Apple & Safari to succeed tremendously, otherwise we wouldn't waste our time reporting bugs.

Some others say it's "stable", and that's fine if it makes you happy, but we will disagree on its current state.
None of these links work btw. Tried on all browsers.
Impressive.

Attachment Image
Score: 2 Votes (Like | Disagree)
Latest Stories
Simplicity and Siri AI Are HomeView's Killer Features, Apple Says
Simplicity and Siri AI Are HomeView's Killer Features, Apple Says
6 minutes ago
iPhone Duo Reviewers Really Miss Face ID
iPhone Duo Reviewers Really Miss Face ID
5 hours ago
Does the iPhone Duo Run Hot? Here's What Reviews Found
Does the iPhone Duo Run Hot? Here's What Reviews Found
6 hours ago
Apple Music's New Look is Now Live on Apple's Website
Apple Music's New Look is Now Live on Apple's Website
7 hours ago
Anthropic Launches Claude Duet, a Proactive AI Agent
Anthropic Launches Claude Duet, a Proactive AI Agent
8 hours ago
What 32,000 Folds Did to the iPhone Duo's Hinge
What 32,000 Folds Did to the iPhone Duo's Hinge
8 hours ago
iPhone Duo's Hidden FaceTime Camera Takes 'Trash' Photos
iPhone Duo's Hidden FaceTime Camera Takes 'Trash' Photos
10 hours ago
iPhone Duo Has 'Edge Light' Feature That Debuted on Macs Last Year
iPhone Duo Has 'Edge Light' Feature That Debuted on Macs Last Year
11 hours ago
Apple Support App Updated for iPhone Duo's Larger Display
Apple Support App Updated for iPhone Duo's Larger Display
11 hours ago
Amazon Sweetens the Deal on Entry-Level 16-Inch MacBook Pro With $570 Off
Amazon Sweetens the Deal on Entry-Level 16-Inch MacBook Pro With $570 Off
11 hours ago
iPhone Duo Tips Over on MagSafe Stands When Unfolded
iPhone Duo Tips Over on MagSafe Stands When Unfolded
11 hours ago
Apple Music's New Look Officially Announced
Apple Music's New Look Officially Announced
12 hours ago
iPhone Duo Supports Apple Pencil Starting With iOS 27.2
iPhone Duo Supports Apple Pencil Starting With iOS 27.2
13 hours ago
iPhone Duo Accessories Roundup: Cases and Screen Protectors From OtterBox, ZAGG, and More
iPhone Duo Accessories Roundup: Cases and Screen Protectors From OtterBox, ZAGG, and More
14 hours ago
Apple Stores Will Have 'Limited' Availability of iPhone Duo for Walk-In Customers
Apple Stores Will Have 'Limited' Availability of iPhone Duo for Walk-In Customers
14 hours ago
iPhone Duo Reviews Explain Why Device is Both 'Fun' and 'Frustrating'
iPhone Duo Reviews Explain Why Device is Both 'Fun' and 'Frustrating'
15 hours ago
Apple Says 'Reachability' Feature Coming to iPhone Duo Later This Year
Apple Says 'Reachability' Feature Coming to iPhone Duo Later This Year
16 hours ago
Loop Capital Cuts Apple Rating Over iPhone Sales Outlook
Loop Capital Cuts Apple Rating Over iPhone Sales Outlook
20 hours ago
Apple Stores in Bordeaux and Lille Looted During French Protests
Apple Stores in Bordeaux and Lille Looted During French Protests
20 hours ago
Bluesound Adds Native Apple Music Support
Bluesound Adds Native Apple Music Support
20 hours ago
Apple CEO John Ternus Explains What Makes Good Product Design
Apple CEO John Ternus Explains What Makes Good Product Design
22 hours ago
UK Proposes New Ways to Help Apple Pay Rivals
UK Proposes New Ways to Help Apple Pay Rivals
1 day ago
WhatsApp Developing In-App Browser for All Chat Links on iPhone
WhatsApp Developing In-App Browser for All Chat Links on iPhone
1 day ago
Apple's App Store Chief Explains Its Push for Premium Games
Apple's App Store Chief Explains Its Push for Premium Games
1 day ago
Apple Could Owe Even More After $5.7 Billion Patent Verdict
Apple Could Owe Even More After $5.7 Billion Patent Verdict
1 day ago
Skyrim Comes to Apple Silicon Macs With New Unofficial Installer
Skyrim Comes to Apple Silicon Macs With New Unofficial Installer
1 day ago
Apple Highlights Mac and iPad Use in Paris Design Exhibition
Apple Highlights Mac and iPad Use in Paris Design Exhibition
1 day ago
Apple Seeks 6G Modem Engineers as It Plans for Post-5G iPhones
Apple Seeks 6G Modem Engineers as It Plans for Post-5G iPhones
1 day ago
First iPhone Duo Unboxing Video Appears Ahead of Friday Launch
First iPhone Duo Unboxing Video Appears Ahead of Friday Launch
1 day ago
Perplexity Computer Can Now Run Fully Locally on Mac
Perplexity Computer Can Now Run Fully Locally on Mac
1 day ago