Apple Releases Safari Technology Preview 149 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 149 includes bug fixes and performance improvements for Web Inspector, Media, CSS, CSS Container Queries, Rendering, JavaScript, Screen Sharing, Web Animations, WebAuthn, Navigation Preload, Web API, and Security.

The current ‌Safari Technology Preview‌ release is built on the Safari 16 update and it includes support for feature coming in macOS Ventura such as Live Text, Passkeys, Web Extension improvements, and more.

The new build of ‌Safari Technology Preview‌ is compatible with machines running macOS 13 Ventura, unlike prior versions of ‌Safari Technology Preview‌, but it no longer works with macOS Big Sur.

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

iOS 18

iOS 18.4 Coming Next Week With These New Features for Your iPhone

Friday February 14, 2025 6:18 am PST by
The first iOS 18.4 beta for iPhones should be just around the corner, and the update is expected to include many new features and changes. Bloomberg's Mark Gurman expects the iOS 18.4 beta to be released by next week. Below, we outline what to expect from iOS 18.4 so far. Apple Intelligence for Siri Siri is expected to get several enhancements powered by Apple Intelligence on iOS...
iPhone 17 Roundup Feature 2

iPhone Design to Change 'Significantly' This Year

Monday February 17, 2025 7:09 am PST by
Apple is set to "significantly change" the iPhone's design language later this year, according to a Weibo leaker. In a new post, the user known "Digital Chat Station" said that the iPhone's design is "starting to change significantly" this year. The "iPhone 17 Air" reportedly features a "horizontal, bar-shaped" design on the rear, likely referring to an elongated camera bump. On the other...
apple launch feb 2025 alt

What to Expect From the 'Apple Launch' Next Week

Thursday February 13, 2025 11:48 am PST by
Apple has yet to announce any new devices this year, but that could change starting next week. Apple CEO Tim Cook today said to "get ready" for a "launch" on Wednesday, February 19. "Get ready to meet the newest member of the family," said Cook, in a social media post. The post includes an #AppleLaunch hashtag, along with a short video featuring an animated Apple logo inside of a circle....
Apple Maps 2024

Apple Maps Might Start Showing Ads

Sunday February 16, 2025 7:22 am PST by
Apple is "exploring" the idea of showing search ads in the Apple Maps app, according to Bloomberg's Mark Gurman. Back in 2022, Gurman said software engineering was "already underway" to display ads in the Apple Maps app, but Apple did not move forward with the idea at the time. Today, he said Apple is "giving this notion more thought" again. This time around, he said Apple has yet to...
Tim Cook Apple Park

10+ Announcements Apple Could Have Rolled Into a February Event

Saturday February 15, 2025 8:00 am PST by
Apple appears to have enough upcoming product announcements to justify a full event this month, yet all signs indicate these reveals will be handled through a series of press releases instead. There are a multitude of rumors from reliable sources about specific announcements in the coming weeks, so here's everything that Apple could have feasibly included in a hypothetical February event: ...
iPhone 17 Pro Render Front Page Tech

iPhone 17 Pro With All-New Camera Bar Design Allegedly Revealed

Thursday February 13, 2025 5:49 pm PST by
Apple's next-generation iPhone 17 Pro will feature three rear cameras arranged in a familiar triangular layout, but the cameras will be housed in an all-new rectangular camera bar with rounded corners, according to YouTube channel Front Page Tech. iPhone 17 Pro camera design render created by Asher for Front Page Tech In a video uploaded today, Front Page Tech host Jon Prosser said the camera ...
m2 pro mac mini

Apple is Now Selling a Refurbished Mac Mini for Just $319 (!)

Saturday February 15, 2025 9:58 am PST by
A few days ago, we reported that Apple's refurbished Mac mini pricing had a problem, and it appears that Apple has taken note. Apple was offering a refurbished Mac mini with the M2 chip, 16GB of RAM, and 256GB of storage for $559, which was $50 more than a refurbished Mac mini with the M4 chip, 16GB of RAM, and 256GB of storage. All other key specifications were equal. That's no longer...
maxresdefault

The MacRumors Show: Apple Teases Its Next Major Product Launch

Friday February 14, 2025 9:38 am PST by
On this week's episode of The MacRumors Show, we discuss the imminent Apple product "launch" that is widely expected to be the fourth-generation iPhone SE. Subscribe to The MacRumors Show YouTube channel for more videos In a social media post on Thursday, Apple CEO Tim Cook teased an upcoming "launch" of some kind scheduled for Wednesday, February 19. "Get ready to meet the newest member of...

Top Rated Comments

nvmls Avatar
34 months ago

Why would anyone want to install Safari Technology Preview on a Mac running macOS 13 beta? You already running Safari 16.0 beta build, so why add the risk of additional Safari issues cause by this preview install?
The Apple consumer carries extreme masochistic levels, you'd be surprised.
Score: 3 Votes (Like | Disagree)
MauiPa Avatar
34 months ago

Why would anyone want to install Safari Technology Preview on a Mac running macOS 13 updated beta 3? You already running Safari 16.0 beta build, so why add the risk of additional Safari issues cause by this preview install?
No issues here pal. I always run STP. It didn't run on Ventura beta 1 or 2, but working now. For the record, the STP page says version 148 not 149 and is working fine. Maybe 149 got pulled?and what risk? If it doesn't work, you don't use it.

Another interesting fact, remember when Google was bragging about being faster than Safari? Nope, not even close. Maybe they ran a special edition or maybe they ran under windows or something. On my M1 MBP, Safari and STP blow away all other browsers. Firefox totally sucks, must not have been updated or something, maybe it is using Rosetta. Chrome and Brave are at lease respectable (albeit way slower than safari)
Score: 2 Votes (Like | Disagree)
nortonandreev Avatar
34 months ago
Release 149 (Safari 16.0, WebKit 18614.1.19.1.5)

Seems to be the same build as the one delivered with Ventura Beta 3.
Score: 2 Votes (Like | Disagree)
sorgo † Avatar
34 months ago
I’m gonna say this potentially points to Monday for a fourth round of dev beta releases… :)
Score: 1 Votes (Like | Disagree)
nortonandreev Avatar
34 months ago

Safari on B3 is seemingly ahead of TP?

Safari 16.0, WebKit 18614.1.19.1.5
Safari TP 16.0, WebKit 18614.1.17.3

EDIT: Oh, that's Release 148. 149 isn't showing up for me.
Seems they have pulled the release.
Score: 1 Votes (Like | Disagree)