Apple Releases Safari Technology Preview 233 With Bug Fixes and Performance Improvements - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Releases Safari Technology Preview 233 With Bug Fixes and Performance Improvements

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 Updated Feature 1
‌Safari Technology Preview‌ 233 includes fixes and updates for Animations, HTML, MathML, Rendering, Web API, and Web Inspector.

The current ‌Safari Technology Preview‌ release is compatible with machines running macOS Sequoia and macOS Tahoe, the newest version of macOS.

The ‌Safari Technology Preview‌ update is available through the Software Update mechanism in System Preferences or System Settings to anyone who has downloaded the browser from Apple's website. Complete 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 it is designed for developers, it does not require a developer account to download and use.

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,...
iOS 28 AI

Apple Taking New Approach to Developing iOS 28 and macOS 28

Sunday November 8, 2026 7:42 am PST by
Apple has made a change to its development process for iOS 28, macOS 28, and corresponding software updates, according to Bloomberg's Mark Gurman. In his Power On newsletter today, he said Apple separates development of each year's new operating systems into three major stages. Typically, he said each stage consists of four weeks of coding followed by a four-week "convergence" period where...
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...

Top Rated Comments

12 months ago

Never really was since it’s not a good browser. Firefox is snappier
What do you do guys with your browsers? Browsing competitions? To me, speed is the least important factor in deciding which browser to use. Nowadays they're all pretty fast.
Score: 4 Votes (Like | Disagree)
12 months ago
I look forward to the day when macstories actually offers useful information related to these updates rather than a glorified update notification wrapped as a blog article.
Score: 2 Votes (Like | Disagree)
12 months ago

Never really was since it’s not a good browser. Firefox is snappier
What year is it where you are? In 2025 Firefox and all Gecko based browsers are the slowest and least compatible by far, it's well on its way to irrelevance at this point, and believe me that's not something I am happy to report. The Chromium monopoly is reminiscent of IE in the late 90s / early 00s, WebKit is the only real competitor and that's only because Apple doesn't allow other browser backends on iOS. Normally I'd be against that kind of thing, but since it's the only reason Chromium isn't completely dominant, I'm not sure.

Let's also remember Chromium is itself a fork of WebKit, if you really want to think of how incestuous the current browser landscape is.
Score: 2 Votes (Like | Disagree)
12 months ago

Is safari now snappier?
Never really was since it’s not a good browser. Firefox is snappier
Score: 2 Votes (Like | Disagree)
12 months ago
did this new version bring back compact tabs in macos tahoe? if not, yawn.
Score: 1 Votes (Like | Disagree)
SmOgER Avatar
12 months ago

What do you do guys with your browsers? Browsing competitions? To me, speed is the least important factor in deciding which browser to use. Nowadays they're all pretty fast.
Scrolling being smooth with low input latency changes the whole experience, makes it more efficient and more pleasant to use. Loading speed obviously matters as well and that depends not only on your internet speed.
That being said, in my experience Safari literally is the fastest/smoothest browser when comparing apples to apples (same ad blocking settings etc).

Can't comment about this specific TP version though. I've tried it a couple of releases back and found it to work worse than the current stable version.
Score: 1 Votes (Like | Disagree)
Latest Stories
MacBook Pro With PROLED XDR Display: Details You Might Have Missed
MacBook Pro With PROLED XDR Display: Details You Might Have Missed
11 minutes ago
Satechi Offers MacRumors Readers 30% Off Select Accessories in Early Black Friday Sale
Satechi Offers MacRumors Readers 30% Off Select Accessories in Early Black Friday Sale
33 minutes ago
Leaker Envisions a Shorter iPhone With a New iOS Layout
Leaker Envisions a Shorter iPhone With a New iOS Layout
1 hour ago
Apple to Give You More Control Over When Your Mac Passwords Lock
Apple to Give You More Control Over When Your Mac Passwords Lock
2 hours ago
Siri Is Getting a Better Memory
Siri Is Getting a Better Memory
2 hours ago
iPhone 18e Could Feature Bigger Display and Battery
iPhone 18e Could Feature Bigger Display and Battery
3 hours ago
Apple's Siri Boss May Leave - Here's Who Could Take Over
Apple's Siri Boss May Leave - Here's Who Could Take Over
3 hours ago
Apple Launching Two More New Products This Friday
Apple Launching Two More New Products This Friday
3 hours ago
Apple Store Subscription Sign-Up Controversy Exposed
Apple Store Subscription Sign-Up Controversy Exposed
12 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
22 hours ago
Apple Taking New Approach to Developing iOS 28 and macOS 28
Apple Taking New Approach to Developing iOS 28 and macOS 28
1 day 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
3 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
4 days ago