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Apple Releases Safari Technology Preview 139 With Bug Fixes and Performance Improvements

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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.jpg

Safari Technology Preview release 139 includes bug fixes and performance improvements for Web Inspector, CSS, Web Animations, Rendering, SVG, WebAuthn, Web API, JavaScript, Content Security Policy, Media, Service Workers, Web Extensions, and more.

The current Safari Technology Preview release is built on the Safari 15.4 update and it includes Safari 15 features introduced in macOS Monterey.

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.


Article Link: Apple Releases Safari Technology Preview 139 With Bug Fixes and Performance Improvements
 
Article Link
https://www.macrumors.com/2022/01/26/apple-releases-safari-technology-preview-139/
Eric_WVGG said:
I noticed that Safari Preview finally has support for `scroll({ behavior: 'smooth' })`. Been waiting so long for this that I honestly thought Apple had some kind of technical/philosophical reason for not supporting it and we'd be using polyfills forever.
Click to expand...
How does this affect scrolling behaviour?
Do you think this will be already included on the just released macOS 12.2, or we'll have to wait until 12.3?

Thank you.
 
now i see it said:
Over a decade of iOS Safari and it still struggles to work properly with many websites. What are they working on?
Click to expand...
Been using Safari as my default browser for many years and I think I've only had one issue with a strict compatibility requirement (a bank website). What struggles are you experiencing?

I'm primarily a web developer so I'm genuinely curious about your experiences.
 
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JamieLannister said:
This version since the last does 120fps while macOS Monterey 12.2 (just released) still does 60fps.

Below: macOS Monterey 12.2 safari
View attachment 1949815
Safari Preview 139:
View attachment 1949816
Click to expand...
You should read the *important* notes in your screenshot. Creator of blurbusters has already stated Safari has never been compatible and it literally shows that in your screenshot.
 
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I have a fully functional top spec 2012 Mac mini that could support Monterey but I’m stuck on Catalina.

I think Apple needs to somewhat decouple Safari from the OS. Is there a reason that Safari can’t be treated like any other app? If it was, I’d have fully functional hide my email instead of a halfassed implementation.

I’m not looking for all the feature updates for my Catalina box but if I’m getting security updates I would think that safari updates could be accomplished as well.

Apple only strands devices like this to force hardware upgrades. If the cared about environment more than profit they would extend Mac support to 10y minimum.

Edit:

Just checked Update and macOS Catalina Security Update 2022-001 10.15.7 @1.5 GB and Safari 15.3 update @92.7 MB are available. Total 1.60 GB.
 
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It has an option to disable page rendering at 60hz and unlocked the full pro motion, I hope that comes with the final public version of safari .4 it’s annoying it’s not by default and you have to select the option in the devolop menu
 
Sheepish-Lord said:
You should read the *important* notes in your screenshot. Creator of blurbusters has already stated Safari has never been compatible and it literally shows that in your screenshot.
Click to expand...
and? one shows 60fps, one shows 120fps.

However, both safari versions (standard and preview) are smooth so I don't have an issue with any of these promotion problems others are seeing. Ghosting is a big issue, however.
 
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This STP update fixes "Search or ent" when audio is playing with the symbol on the address bar that causes text to be cut off on compact mode.. Still present on the stable Safari.

Screen Shot 2022-01-21 at 11.13.13 PM.png
Screen Shot 2022-01-21 at 11.13.27 PM.png
 
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telo123 said:
This STP update fixes "Search or ent" when audio is playing with the symbol on the address bar that causes text to be cut off on compact mode.. Still present on the stable Safari.

View attachment 1949841View attachment 1949843
Click to expand...

WFH really sucks for developers. I'm sure I enjoy waking up in my jammies and coding right away or staying up late coding and watching Netflix at the same time but seriously get your sht together!
 
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Updated my MacBook Pro to Mac OS 15.2 and upon restarting, lost Tech Preview completely. Had to download it again.
 
I have upgraded from 138 to 139 and loading any login page (Google or Microsoft) hangs. I deleted any folders containing SafariTechnologyPreview under ~/Library but it still hangs. Everything worked fine in 138. Basically I cannot login into my accounts. Using the usual Safari works
EDIT: after reinstalling SafariTechnologyPreview now even loading youtube hangs
 
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Populus said:
How does this affect scrolling behaviour?
Do you think this will be already included on the just released macOS 12.2, or we'll have to wait until 12.3?

Thank you.
Click to expand...
It is part of Safari 15.4, so should be available with Monterey 12.3.

The scroll-behaviour: smooth is for when there is a link on the page that scrolls to a specific section of the page. Currently, it would directly "jump" there, where as with the smooth behaviour it will animate the scrolling. It does not relate to the scrolls performed by the user. It's a nice addition to Safari, but it's not such a big deal either.
 
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excelsior.ink said:
I have upgraded from 138 to 139 and loading any login page (Google or Microsoft) hangs. I deleted any folders containing SafariTechnologyPreview under ~/Library but it still hangs. Everything worked fine in 138. Basically I cannot login into my accounts. Using the usual Safari works
EDIT: after reinstalling SafariTechnologyPreview now even loading youtube hangs
Click to expand...
I'm having the same issue with most websites.
 
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kdekorte said:
Anyone else having the issue where normal Safari loads pages fine, but the Tech Preview stalls when loading pages?
Click to expand...
138 was completely erased from my MBP when I updated it to MacOS 12.2. I downloaded Tech Preview 139 and have the same problem you're having.
 
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kdekorte said:
Anyone else having the issue where normal Safari loads pages fine, but the Tech Preview stalls when loading pages?
Click to expand...
Happens in stable also, maybe you were just lucky not to experience it.

now i see it said:
Over a decade of iOS Safari and it still struggles to work properly with many websites. What are they working on?
Click to expand...
Even Chuck Norris doesn't know the answer.
 
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