Apple Releases Safari Technology Preview 63 With Bug Fixes and Feature Improvements - MacRumors
Skip to Content

Apple Releases Safari Technology Preview 63 With Bug Fixes and Feature Improvements

by

safaripreviewiconApple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced over two years ago 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 63 includes bug fixes and feature improvements for Dark Mode, Custom Elements, Media, Web Animations, Web API, Accessibility, Web Inspector, Internationalization API, WebGL 2, and SVG.

The new Safari Technology Preview update is available for both macOS High Sierra and macOS Mojave, the newest version of the Mac operating system that’s currently being beta tested by developers. Apple notes that Adobe Flash content does not load on macOS Mojave in Release 63.

The Safari Technology Preview update is available through the Software Update mechanism in the Mac App Store (or in System Preferences in Mojave) 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.

Top Rated Comments

107 months ago
I'd been using it for a bit as my primary browser (love those new tab icons), but the last version was crashing a ton. Hopefully this fixes that...
Agreed. I've been using the Tech Preview for a long time, and the last version was easily the worst I have seen.
Score: 4 Votes (Like | Disagree)
107 months ago
I'd been using it for a bit as my primary browser (love those new tab icons), but the last version was crashing a ton. Hopefully this fixes that...
Score: 2 Votes (Like | Disagree)
atikalz Avatar
107 months ago

Apple today released a new update ('https://developer.apple.com/safari/download/') for Safari Technology Preview, the experimental browser Apple first introduced ('https://www.geekwebguides.com/2016/03/30/apple-safari-technology-preview-browser/') over two years ago 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 63 includes bug fixes and feature improvements for Dark Mode, Custom Elements, Media, Web Animations, Web API, Accessibility, Web Inspector, Internationalization API, WebGL 2, and SVG.

The new Safari Technology Preview update is available for both macOS High Sierra and macOS Mojave, the newest version of the Mac operating system that's currently being beta tested by developers. Apple notes that Adobe Flash content does not load on macOS Mojave in Release 63.

The Safari Technology Preview update is available through the Software Update mechanism in the Mac App Store (or in System Preferences in Mojave) to anyone who has downloaded the browser ('https://developer.apple.com/safari/download/'). Full release notes for the update are available on the Safari Technology Preview website ('https://developer.apple.com/safari/technology-preview/release-notes/').

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 63 With Bug Fixes and Feature Improvements ('https://www.geekwebguides.com/2018/08/15/apple-releases-safari-technology-preview-63/')
Now that they finally implemented favicons, they killed my must have plug-ins by their forced but empty App Store. Why are they making it so hard to switch to Safari on macOS?
So I have to stick to chrome...
Score: 1 Votes (Like | Disagree)
107 months ago
Still doesn't work properly with Youtube.
Score: 1 Votes (Like | Disagree)

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....
Latest Stories
Apple Ordered to Open iPhone to Rival App Stores in Australia
Apple Ordered to Open iPhone to Rival App Stores in Australia
11 minutes ago
Apple Suppliers Face Hurdles Cutting Circuit Board Emissions
Apple Suppliers Face Hurdles Cutting Circuit Board Emissions
37 minutes ago
Things Updated for iPhone Duo With Adaptive Layout
Things Updated for iPhone Duo With Adaptive Layout
1 hour ago
Simplicity and Siri AI Are HomeView's Killer Features, Apple Says
Simplicity and Siri AI Are HomeView's Killer Features, Apple Says
1 hour ago
iPhone Duo Reviewers Really Miss Face ID
iPhone Duo Reviewers Really Miss Face ID
6 hours ago
Does the iPhone Duo Run Hot? Here's What Reviews Found
Does the iPhone Duo Run Hot? Here's What Reviews Found
8 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
8 hours ago
Anthropic Launches Claude Duet, a Proactive AI Agent
Anthropic Launches Claude Duet, a Proactive AI Agent
9 hours ago
What 32,000 Folds Did to the iPhone Duo's Hinge
What 32,000 Folds Did to the iPhone Duo's Hinge
10 hours ago
iPhone Duo's Hidden FaceTime Camera Takes 'Trash' Photos
iPhone Duo's Hidden FaceTime Camera Takes 'Trash' Photos
11 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
12 hours ago
Apple Support App Updated for iPhone Duo's Larger Display
Apple Support App Updated for iPhone Duo's Larger Display
12 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
12 hours ago
iPhone Duo Tips Over on MagSafe Stands When Unfolded
iPhone Duo Tips Over on MagSafe Stands When Unfolded
12 hours ago
Apple Music's New Look Officially Announced
Apple Music's New Look Officially Announced
14 hours ago
iPhone Duo Supports Apple Pencil Starting With iOS 27.2
iPhone Duo Supports Apple Pencil Starting With iOS 27.2
15 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
15 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
16 hours ago
iPhone Duo Reviews Explain Why Device is Both 'Fun' and 'Frustrating'
iPhone Duo Reviews Explain Why Device is Both 'Fun' and 'Frustrating'
16 hours ago
Apple Says 'Reachability' Feature Coming to iPhone Duo Later This Year
Apple Says 'Reachability' Feature Coming to iPhone Duo Later This Year
17 hours ago
Loop Capital Cuts Apple Rating Over iPhone Sales Outlook
Loop Capital Cuts Apple Rating Over iPhone Sales Outlook
21 hours ago
Apple Stores in Bordeaux and Lille Looted During French Protests
Apple Stores in Bordeaux and Lille Looted During French Protests
21 hours ago
Bluesound Adds Native Apple Music Support
Bluesound Adds Native Apple Music Support
22 hours ago
Apple CEO John Ternus Explains What Makes Good Product Design
Apple CEO John Ternus Explains What Makes Good Product Design
23 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