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How to Fix “WebKit encountered an internal error” on iPhone

Are you getting the “WebKit encountered an internal error” on your iPhone?

This known bug prevents the Safari browser app on iPhone from loading webpages.

The WebKit error message can come from many issues with your iOS software. In this article, we’ll walk you through all the possible fixes.

Restart your iPhone or iPad

To solve this problem, there are a few things you can try. You can begin by restarting the iPhone or iPad.

• Press the power button and the volume up button until you see “slide to power off.”
• Drag slider to turn off your device.
• Wait about 20 seconds and press on the power button until you see the Apple logo.

Now that you have restarted your iPhone, try opening up Safari again and loading the website you were trying to access before this error occurred.

If everything works out well for you, great!

You may now continue using web apps without fear of encountering another “WebKit internal error” message!

Force quit Safari

You can force quit Safari from the App Switcher on your iPhone.

• Swipe up from the bottom of the screen. You should see a list of opened applications.
• Swipe right or left to find the Safari app.
• Swipe up on the app to fully close it.

Disable HTTP/3

Some iOS users have reported seeing this error only when the HTTP/3 protocol is enabled.

To disable this newly added feature, you can go to Parameters > Safari > Advanced > Experimental Features > HTTP/3.

Reset network settings

If nothing helped and you’re still seeing the Webkit error message, the last resort is resetting your iPhone’s network settings.

To do so, go to Settings > General > Reset and tap on Reset Network Settings. You have to enter the passcode of your device if prompted before you can continue with the reset process.

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How to Fix “Webkit Encountered an Internal Error” on Safari

Troubleshoot safari webkit errors: quick guide..

Table of Contents

Learn how to Fix “Webkit Encountered an Internal Error” on Safari in this guide. There are a lot of people like you who have tried to use Safari and got the annoying “WebKit encountered an internal error” message. This glitch can be a real pain because it keeps you from getting to your favourite websites or finishing online jobs. Don’t worry, though—we’re here to help you figure out what’s wrong and fix it so you can browse without any problems.

We have a number of easy fixes for you whether you’re using Safari on a Mac , an iPhone , or an iPad . We’ll go over simple fixes like restarting your device and checking to see if any apps are to blame. Our goal is to use simple steps to find and fix possible problems, like old software or apps that don’t work together.

Then let’s get our hands dirty and enter the digital world with a set of digital tools. You can get back to enjoying Safari and browsing the web without any problems if you know what to do. Remember that this is only the beginning. In the sections that follow, we’ll go into more depth and give you specific steps to take against each possible culprit. Get ready to feel comfortable navigating the modern world! Here are the ways how to Fix “Webkit Encountered an Internal Error” on Safari.

What is “Webkit Encountered an Internal Error” on Safari

If you see a message like “Webkit Encountered an Internal Error” in Safari, it means that WebKit, Safari’s engine, is having trouble. This glitch could be caused by a number of things, including incorrect saving of temporary data, the addition of items to Safari that don’t work well with others, or software that is incompatible with Safari. To fix it, clear out the cache (temporary storage) and disable any extras you added to Safari, such as plugins.

If the problem is still there, you could try restoring Safari to its original settings or getting help from Apple. A good way to make sure Safari works well while you’re browsing the web is to keep your computer and browser up to date and fix any conflicts or data issues that could lead to these mistakes. You want to be able to browse easily, and a little troubleshooting can help keep things running smoothly.

Causes for “Webkit Encountered an Internal Error” on Safari

• Bugs in the software: Because software is software, Safari may have bugs or problems in its code that cause mistakes inside the programme.
• Extensions That Don’t Work: Some browser add-ons or add-ons may not work with this version of Safari, which can lead to problems and issues.
• Broken Cache or Cookies: If the browser’s cache or cookies are broken, it could cause problems when it tries to load web material.
• Outdated Version of Safari: Some websites or services might not work properly if you use an old version of Safari.
• Malicious Content: Going to websites with harmful content or running into harmful scripts could cause problems inside the browser’s display engine.
• Hardware Acceleration Issues: If there are issues with Safari’s hardware acceleration features, they could cause problems inside the app.
• Operating System Compatibility: Safari may not work as well if there are problems with how it works with the operating system.

Identify the Error Message

• Encountering a “Webkit Internal Error” is crucial.
• Note any extra information in the error message.
• This might involve error codes or specific details.
• These details can help identify the cause.

Update Safari to the Latest Version

• Open the App Store on your Mac .
• Navigate to the “ Updates ” tab.
• Look for Safari updates and click “ Update ” next to it.

Clear Browser Cache and Cookies

• Open Safari and navigate to the “Safari” menu.
• Choose “Preferences” and head to the “Privacy” tab.
• Click on “Manage Website Data” and select “Remove All.”
• Confirm the action.

Disable Extensions

• Go to the “ Safari ” menu and select “ Preferences .”
• Navigate to the “ Extensions ” tab.
• Uncheck the box next to each extension to disable them.

Reset Safari

• Choose “Reset Safari.”
• Mark the options you wish to reset.
• Click “Reset.”

Check for System Updates

• Click on the Apple logo in the top-left corner .
• Select “System Preferences” and go to “Software Update.”
• Install any available updates .

In conclusion, if you want to browse the web without any problems, you need to fix the “Webkit Encountered an Internal Error” problem in Safari. Users can fix the problem and get their computer back to normal by following the troubleshooting steps given. These steps include clearing browser caches, turning off extensions, and making sure the browser is up to date. They are all meant to find and fix possible error reasons.

Also, make sure you check for Safari updates to make sure it works with the newest web tools and security fixes. Being proactive about keeping and fixing browser problems not only fixes problems right away, but it also makes the whole online experience smoother and safer. By using these simple but effective fixes, users can get rid of the “Webkit Encountered an Internal Error” message and enjoy a more stable Safari viewing experience that is free of problems and interruptions.

Question and Answer

If you are experiencing difficulties with Safari, it is highly recommended that you immediately switch to an other web browser such as Chrome or Firefox. While you are figuring out what the issue is with Safari, you should make sure that the other browser is running the most recent version.

Yes, there are situations when Safari can be affected by problems caused by other programmes. It is recommended that you temporarily disable any antivirus or security software in order to determine whether or not this is the cause of the issue with the browser.

Seeking additional assistance with Safari on your Mac? You have the option of contacting Apple Support or searching for assistance on websites. Find assistance that is compatible with the version of Safari and macOS that you are using.

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Compsmag's Technology Editor, based in New York City, Carmelia Derby has been with the publication for a number of years. She discusses her thoughts on the most recent consumer electronics and offers pointers on how to get the most out of them. When Carmelia isn't obsessing over the next best thing, she's typically fuming about how the Los Angeles Lakers have failed to live up to her expectations.

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Clinton Harding is the Editor in Charge of Phones at Compsmag. In this role, he covers everything related to mobile devices, including the components that will be used to power your next phone. You can read his perspectives on the current situation of Android phones in his reviews, editorials, and other writings on this site. He has a lot to say on the subject.

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Apple emits emergency fix for exploited-in-the-wild WebKit vulnerability

Flaw imperils safari – and every ios browser because of cupertino's t&cs.

Apple on Thursday patched a zero-day security vulnerability in its WebKit browser engine, issuing updates for iOS, iPadOS, and macOS.

Its Safari browser, based on WebKit, received the security update separately for instances where it is being used with an older version of macOS, like Big Sur. Apple's tvOS was also refreshed, but without the security fix.

The updates – iOS 15.3.1, iPadOS 15.3.1 , and macOS Monterey 12.2.1 – address CVE-2022-22620, reported to Apple by an anonymous researcher.

"Processing maliciously crafted web content may lead to arbitrary code execution," the company's terse security advisory explains. "Apple is aware of a report that this issue may have been actively exploited."

Apple is aware of a report that this issue may have been actively exploited

CVE-2022-22620 is a use-after-free flaw that Apple says it fixed by implementing better memory management. No further details about the vulnerability or potential exploit code have been made available.

Zero-days in Apple software have been used to carry out sophisticated cyberattacks, such as those conducted by authoritarian regimes against members of civil society with the help of NSO Group's Pegasus software. In September, 2021, threat research group Citizen Lab documented a zero-day flaw called FORCEDENTRY (CVE-2021-30860) that had been used for at least eight months to compromise Apple iOS, macOS and watchOS devices.

Single point of failure

The Apple patch is relevant not just to users of Safari, which relies on WebKit, but to users of any iOS browser, because Apple requires that all iOS browsers use WebKit – a situation currently being considered by antitrust regulators in the US and UK.

Alex Russell, a program manager for Microsoft's Edge browser who formerly worked at Google and has long evangelized web technology, echoed past frustration with Apple's insistence that only WebKit is fit for iOS.

"Imagine, if you can, a world where installing an alternative browser as your default actually had a chance of protecting you from Apple's shocking underinvestment in security," he lamented via Twitter .

In defense of its practices, Apple claims "that as a result of its requirement that all browsers on iOS be based on its own browser engine, WebKit, it is more readily able to fix any privacy and security concerns that arise in a timely manner, and reduce risks for users," as the the UK's Competition and Market Authority recounted in its January 26, 2022 interim report .

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Based on past data gathered by Google's Project Zero, "in a timely manner" means "not all that quickly."

In Project Zero's recent analysis of zero-day remediation, Apple's average repair time for iOS bugs is more or less the same and Google's average repair time for Android – 70 and 72 days respectively.

But when browser repairs are compared, Apple fares less well.

"WebKit is the outlier in this analysis, with the longest number of days to release a patch at 73 days," wrote Project Zero researcher Ryan Schoen. "Their time to land the fix publicly is in the middle between Chrome and Firefox, but unfortunately this leaves a very long amount of time for opportunistic attackers to find the patch and exploit it prior to the fix being made available to users."

Time to shut the stable door

The Register understands from speaking to web developers opposed to Apple's WebKit policies that a few months ago Apple started showing signs that it intends to invest in WebKit.

Since Apple's Worldwide Developer Conference last year, developers participating in Apple's ecosystem have been scolding the company for underinvesting in the web. And they have expressed concern that Safari could become the new Internet Explorer – a reference to the time Microsoft's disinterest in its once-dominant browser frustrated web developers and ultimately led to the emergence of Mozilla's Firefox, and then Google's Chrome.

"Apple Legal often uses Web Apps as a defense against AppStore anti-trust/monopoly investigations but this defense is only realistic if there's a significant investment in Apple's web platform and is seen to at least be trying to keep it competitive with native apps," wrote a developer posting under the name Niskraw. "This alone should be a good enough reason for the higher ups to give the team the budget they need."

Since September 2021, Apple has posted 35 positions with its WebKit team in the US and leaders of that group on Twitter have repeatedly solicited technical talent .

But given Apple's less-than-eager response to comply with a recent Dutch ruling requiring the company to permit third-party payment processors in local data apps, it appears to be unlikely Apple will relax its WebKit requirement in iOS unless regulators force a change. ®

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What Is Webkit Encountered An Internal Error On Safari And How To Fix It

The Webkit encountered an internal error message is often fixed by disabling the Private Relay feature found on Apple devices. If you’ve encountered this problem on your iPhone or iPad, open up the settings app and tap on your Apple ID . Tap on iCloud , then scroll down and tap on Private Relay. Toggle the switch off to disable this feature.

Reasons For Webkit Encountered An Internal Error On Your iPhone, iPad, or Mac

• Your device’s operating system may be out of date – If your device is running an older version of the operating system, it may not be compatible with other modules, resulting in websites not being able to load properly and causing a WebKit internal error.
• The Safari browser has a corrupt history of website data – If you come across a WebKit internal error, it might be because the browser’s history or website data is corrupt. This communication breakdown can cause funny business and, ultimately, the error message you’re seeing.
• A problem with iCloud’s Private Relay Feature – The iCloud’s Private Relay feature uses a double relay system to mask your IP from ISPs and websites. However, if data packets sent between the Safari browser and website become corrupted during this relaying process, it could result in the WebKit error.
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Restart / Reset Safari

For iphone and ipad.

• Open up the app switcher. You can do this by swiping up from the bottom of the screen. Or, if you have an older phone, press the Home button twice.
• Remove the Safari card from your screen by swiping it away.

• Go to your home screen and open Safari again.
• Use the shortcut Command + Option + Escape to open the Force-Quit dialog.
• In the list that pops up, choose Safari , then click on Force Quit.

• Wait a few seconds and re-open the web browser via Launchpad or Dock.

Clear the Safari Browser Web Cache

For iphone & ipad.

• Open up the Settings app.
• Scroll down toward the middle of the screen and tap Safari .

• Scroll all the way down and tap Clear History and Website Data .

• Open up Safari from the Dock or Launchpad.
• At the top left corner of your screen, select Safari , then click on Clear History .

• When the options window pops up, open the drop-down menu and select All History .

• Click on Clear History .

Disable the Private Wi-Fi Address of the Device

• Open up the Settings App.
• Tap on Wi-Fi .

• Scroll down toward the middle of the screen to find Private Wi-Fi Address . Toggle the switch off to disable the feature.

• Relaunch your Safari browser and see if the error has disappeared.

Disable All Safari Extensions

• Open the Settings app.
• Find and tap on Safari .

• Scroll down until you find Extensions. Tap on it.

• You will now be presented with a list of extensions. Uncheck each one of them.
• Open up Safari, either from the Dock or from Launchpad.
• At the top left corner of the screen, click on Safari and then click on Settings .

• At the top of the window, select the Extensions tab.

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Disable the Private Relay Feature

• At the top of our screen, tap on your Apple ID to open up your account information.

• Toward the bottom of the screen, tap on Private Relay .

• You will be presented with a Private Relay switch . Toggle it off to disable this feature.

• Click on the Apple Logo, then click on System Settings.

• Tap on your Apple ID to open up your account information.
• Click on iCloud .

• Scroll down until you find Private Relay . Click it.

• In the top right corner, click Turn off . To confirm your action, click Done .

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A Guide to iOS Safari’s Experimental WebKit Features

Experimental WebKit features in iOS are a key part of Apple’s commitment to providing developers with the tools they need to create cutting-edge web experiences within their apps. These features are constantly changing and evolving with each new release of iOS and updates to the Safari app. While they may not be relevant to the average user, they offer valuable debugging capabilities and insights for web developers.

These experimental features can be accessed through the Safari WebKit Experimental Features settings page. However, it’s important to note that these settings are advanced and could impact various aspects of Safari’s configuration. Unless you have a deep understanding of these features and their implications, it’s generally best to stick with the default settings.

For developers, these experimental WebKit features can be incredibly useful. They allow for testing and debugging of upcoming web technologies, ensuring that apps are ready to take advantage of the latest advancements. By toggling these features on or off, developers can fine-tune their web experiences and ensure optimal performance.

It’s worth mentioning that these experimental features are subject to change and may not be supported in future versions of iOS. Therefore, it’s important for developers to stay up to date with the latest documentation and announcements from Apple to ensure compatibility with upcoming releases.

While the average user may not need to tinker with these experimental features, they play a crucial role in pushing the boundaries of web development and enhancing the overall user experience. By providing developers with the tools they need to test and experiment with new technologies, Apple is encouraging innovation and ensuring that iOS remains at the forefront of web development.

Experimental WebKit features in iOS are a powerful resource for developers, allowing them to debug and optimize web experiences within their apps. While they may not be relevant to the average user, they demonstrate Apple’s commitment to supporting and advancing web development on iOS devices.

What Does Experimental WebKit Features Mean on iPhone?

Experimental WebKit features on iPhone refer to the additional functionalities and capabilities that are being tested and developed by Apple for the Safari browser. These features are not fully stable or officially released yet, but are made available for developers to experiment with and provide feedback.

Here are some key points to understand about experimental WebKit features on iPhone:

1. Testing and development: Apple continuously works on improving the Safari browser by introducing new features and enhancements. Experimental WebKit features are a part of this ongoing development process. They are not yet fully implemented or guaranteed to work flawlessly, but they provide developers with a glimpse of what is being worked on and allow them to test and provide feedback.

2. Accessibility to developers: Apple offers these experimental features to developers so they can integrate and test them within their own apps. This allows developers to explore the potential benefits and drawbacks, identify any issues, and provide valuable feedback to Apple. It also helps developers understand how these features can enhance their web experiences within their apps.

3. Debugging and optimization: Experimental WebKit features enable developers to debug and optimize web experiences within their apps. By accessing these features, developers can identify and fix any issues or bugs that may arise when implementing web content in their apps. This ensures a smoother and more efficient browsing experience for users.

4. Commitment to improvement: Apple’s provision of experimental WebKit features showcases their commitment to continuously improving the Safari browser and enhancing the overall web experience on iPhone. By encouraging developers to test and provide feedback on these features, Apple can gather valuable insights and make necessary improvements before officially releasing them.

Experimental WebKit features on iPhone are a way for Apple to test and improve the Safari browser by providing developers with early access to new functionalities. It allows developers to experiment, debug, and optimize web experiences within their apps, while also providing Apple with valuable feedback for further enhancements.

Should You Turn Off Experimental Features in Safari?

Turning off experimental features in Safari is not necessary for regular users who are primarily concerned about privacy and security. These experimental features are mainly designed for developers and may change frequently with different iOS releases and Safari updates. However, if you are a developer or have a specific need to use these experimental features, it is important to understand their implications and potential impact on your browsing experience.

Here are some points to consider when deciding whether to turn off experimental features in Safari:

1. Stability: Experimental features are in the testing phase and may not be as stable as the standard features. They may have bugs or compatibility issues with certain websites or apps. If you rely on Safari for your daily browsing needs, it is generally recommended to stick with the stable and fully supported features.

2. Compatibility: Some experimental features might not be compatible with all websites or web technologies. This could result in certain websites not loading properly or functional issues. If you frequently visit a wide variety of websites, it is advisable to disable experimental features to ensure a consistent browsing experience.

3. Security and Privacy: Experimental features may introduce potential security vulnerabilities or compromise your privacy. As they are still being tested, they may not have undergone the same level of scrutiny and security audits as the stable features. Disabling experimental features can help minimize the risk of encountering security vulnerabilities or privacy concerns.

Regular users who prioritize stability, compatibility, security, and privacy are generally better off disabling experimental features in Safari. However, if you are a developer or have specific needs that require the use of these features, it is crucial to understand their implications and proceed with caution.

What Experimental WebKit Features Should Be Off?

When it comes to experimental WebKit features, it is generally recommended to keep them turned off unless you have a specific need for them. Here are some of the experimental WebKit features that should be turned off:

1. CSS Regions: This experimental feature allows content to flow through multiple layout regions, but it is not well-supported across different browsers and may cause compatibility issues.

2. CSS Exclusions: This feature enables the creation of complex shapes for text wrapping and layout, but it is still in the experimental stage and may not work consistently across browsers.

3. CSS Filters: This feature allows you to apply various visual effects to elements using CSS, such as blurring or adjusting colors. However, it is still being developed and may not have consistent support across different browsers.

4. CSS Shapes: This experimental feature allows you to define the shape of an element’s content area, enabling text to flow around non-rectangular shapes. While it can be useful in certain scenarios, it is not widely supported and may cause compatibility issues.

5. WebRTC: This technology enables real-time communication between browsers, such as video calls or file sharing. While it has great potential, it is still considered experimental and may have security vulnerabilities or compatibility issues.

It’s important to note that experimental features are not fully tested and may not work as expected. They are intended for developers to explore and provide feedback, but should not be relied upon for production websites. Therefore, it is generally recommended to keep these experimental WebKit features turned off unless you have a specific need and are familiar with the potential risks and limitations they may bring.

Remember, always test and verify the compatibility and stability of any experimental feature before implementing it in a live environment.

What is Apple Experimental WebKit?

Apple’s experimental WebKit refers to a collection of advanced settings that can be customized to modify various configuration options within the WebKit framework. WebKit is a browser engine developed by Apple that powers the Safari web browser on Mac, iOS, and other Apple devices.

The experimental WebKit settings page provides access to a range of options that can be tweaked to alter the behavior and performance of WebKit. These settings are typically used by developers and advanced users who have a deep understanding of how the browser engine works and want to experiment with different configurations.

It’s important to note that these settings are not intended for casual users or those without technical expertise. Modifying these settings without proper knowledge can have unintended consequences and may negatively impact the browsing experience or even cause compatibility issues with websites.

By default, most users are advised to leave these experimental settings untouched, as they are already optimized for the best performance and compatibility. Only developers or experienced users who understand the implications of their changes should venture into modifying these settings.

Here are a few examples of the types of settings that can be found on the experimental WebKit settings page:

1. Performance-related settings: – Enable hardware acceleration: Utilizes the device’s hardware capabilities to render web content faster. – Enable fast scrolling: Improves the smoothness and responsiveness of scrolling within webpages. – Enable CSS animation smooth scrolling: Enhances the animation effects during scrolling.

2. Privacy and security settings: – Enable experimental features: Allows the testing of new features that may enhance privacy and security. – Control website tracking: Provides options to limit or block cookies and other tracking mechanisms.

3. Developer-oriented settings: – Enable remote debugging: Enables remote debugging of web content for developers. – Enable experimental features in the Web Inspector: Allows testing and access to experimental features within the developer tools.

It’s worth reiterating that these settings should only be modified by individuals who are familiar with their implications and have a specific need or purpose in mind. Modifying these settings without proper knowledge can lead to unexpected results and potential issues.

The experimental webkit features in iOS offer developers the opportunity to enhance and debug their web experiences within their apps. These features are constantly evolving and are updated with each release of iOS and Safari app update. While these experimental features may seem enticing, it is important to note that they are primarily designed for developers and not necessary for regular users.

For the average user, there is no need to tamper with the experimental webkit features in order to configure Safari for better privacy or performance. Unless you have a specific need for a non-common web application that requires a specific experimental feature, it is advisable to leave these settings at their default values.

The “experimental webkit settings” page may be misleadingly named, as it contains advanced settings that can have a significant impact on various configuration items. Unless you are well-versed in these settings and know exactly what you are doing, it is recommended to avoid making changes to them.

The experimental webkit features demonstrate Apple’s commitment to supporting developers and improving the web experience on iOS. However, for the average user, it is best to leave these features untouched and trust in the default settings provided by Apple.

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Sanjeev Singh

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

How do I fix "WebKit encountered an internal error" (WebKitErrorDomain:300)?

I have a mac book pro. It will not let me open "about this Mac" and when I try to open safari I get an error message that reads "WebKit encountered an internal error" (WebKitErrorDomai:300). any fixes?

MacBook Pro (13-inch Mid 2012), iOS 9.1

Posted on Dec 8, 2015 8:00 AM

Posted on Dec 8, 2015 8:10 AM

Restart in safe Mode (hold down shift at startup). This spends five minutes running the equivalent of Disk Utility (Repair Disk) while showing a progress bar, then demands your userid and password to continue, even if you normally auto-login.

Screen re-draw will be slow because few kernel extensions (and NO third-party extensions) are loaded.

If it works fine in Safe Mode, but not in regular mode, you added too much junk and it is interfering with normal operation of Mac OS X.

If it does not work in Safe Mode either, you may need a Mac OS X Re-Install.

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Dec 8, 2015 8:10 AM in response to Jdfeger

Dec 8, 2015 8:31 AM in response to Grant Bennet-Alder

Thank you. I actually got the computer working right before you posted. I cleared all history and shut down twice. Not sure why but when I restarted second time everything seemed to work. Again thanks for your time

WebKit Features in Safari 17.1

Oct 25, 2023

by Jen Simmons

Today we are pleased to share what new in WebKit for Safari 17.1. It’s now available for iOS 17 , iPadOS 17 , macOS Sonoma , macOS Ventura and macOS Monterey.

Managed Media Source

Safari 17.1 now brings the new Managed Media Source API to iPhone. Originally shipped in Safari 17.0 for iPad and Mac, Managed Media Source is a power-efficient, low-level toolkit for streaming video.

Watching streaming video is an amazing thing we all do with our devices. But to get the highest-quality video without downloading any unnecessary data and without killing the battery, it takes a complicated stack of technology working under the hood every time you hit the play button. Adaptive bitrate streaming is a technique for switching between media data formats on the fly, depending on the speed of the internet connection and capabilities of the device, even as the conditions change.

For years, many websites have used Media Source Extensions (MSE) to handle adaptive bitrate streaming. It’s a low-level toolkit that gives the web page more control and more responsibility for managing buffering and resolution. But MSE isn’t particularly good at managing buffer levels, network access, and media variant selection. Plus, it uses a lot of power, which can be especially painful on mobile devices with smaller batteries.

Managed Media Source adds the capabilities of MSE, without any of the drawbacks. We were excited to propose ManagedMediaSource to the W3C’s Media Working Group for formal standardization.

Note that support for Managed Media Source is only available when an AirPlay source alternative is present, or remote playback is explicitly disabled.

Learn all about Managed Media Source API by watching Explore media formats for the web at WWDC23.

Safari Extensions updates

Safari 17.1 also adds support for storage.session.setAccessLevel and updated storage.session to be accessed only by TRUSTED_CONTEXTS by default.

WebKit for Safari 17.1 provides multiple bug fixes and feature polish.

Accessibility

• Fixed properly exposing the expanded state of <details> elements on iOS. (109684906)
• Fixed exposing column headers of cells within role="row" elements with display: contents to assistive technologies. (115190637)
• Fixed empty accessibility label for role="treeitem" elements with display: contents who have child text starting with a newline. (115226509)

Authentication

• Fixed a bug that could cause authentication through Extensible Enterprise Single Sign-On to hang if the authentication was canceled on the server side. (105809792)
• Fixed font-size-adjust toggling font sizes for system-ui font. (111709567)
• Fixed counter values to prevent them from overflowing or underflowing. (111743827)
• Fixed auto none support for contain-intrinsic-size . (112479718)
• Fixed a positive look-behind RegExp with alternatives of different minimum lengths. (112952197)
• Fixed an issue with a workaround to handle cases where websites serve Data URLs with malformed padding. This issue prevented some images in Word documents from failing to display when hosted by Box and Sharepoint. (114573089)
• Fixed fullscreen ready check to remove the hierarchy requirement. (110004138)
• Fixed an issue where HTTP Live Streaming (HLS) videos may be offset and clipped within their video element’s frame. (110467872)
• Fixed videos disappearing when switching from landscape to portrait. (112416568)
• Fixed vertical multiline WebVTT captions getting cut off. (112951878)
• Fixed an issue where AirPods spatial audio quality is degraded after loading sites that request user media in Safari. (113604970)
• Fixed an issue where media will play with sound but no video after pressing the back button in Safari. (113605284)
• Fixed an issue where media of type application/x-mpegURL; codecs="avc1.42E01E" does not play in Safari. (113608345)
• Fixed an issue where a media element backed by MediaSource may not receive the seeked event. (114594559)

Performance

• Fixed a bug that caused poor performance when resuming WebKit-based apps, including causing a black screen or a blurry snapshot of the app’s prior state to be temporarily visible to users. (114795818)
• Fixed an issue where scrollbars would sometimes show unexpectedly in fullscreen content. (113605155)
• Fixed a bug that could cause sites to layout improperly in Private Browsing mode. (113607432)
• Fixed handling iframes with display: none . (112494003)
• Fixed an issue that could trigger a crash when web content uses WebSockets. (75425816)
• Fixed intermittent removal of adoptedStyleSheet CSSStyleSheet instances when assigning an adoptedStyleSheet array. (107768559)
• Fixed: Improved the performance of IntersectionObserver operations during scrolling. (111120491)
• Fixed ElementInternals.setFormValue(<nullish value>) to clear the submission value. (111802198)
• Fixed keyboard scroll not stopping after pressing the down arrow if keyup is default prevented. (112396756) (FB12647732)
• Fixed window.postMessage with OffscreenCanvas with an isolated world message listener. (112618195)
• Fixed a bug that could cause a nested popover element within a shadow DOM to improperly dismiss its ancestor popover. (113604250)
• Fixed handling dismissed notifications on macOS. (113756668)

Web Inspector

• Fixed objects logged to the console with multiple private fields that use the same name. (109215331)
• Fixed: Stopped using Number.prototype.toLocaleString() for numeric console format specifiers. (112170843)
• Fixed an issue which would cause unnecessary “WebGL: context lost.” errors after Safari has been moved to the background on iPadOS. (115500744)

If you are running macOS Ventura or macOS Monterey, you can update Safari by going to Software Update, and clicking “More info”. On macOS Ventura, that’s  > System Settings > General > Software Update > More info. To get Safari 17.1 on your iPhone or iPad, go to Settings > General > Software Update, and tap to update.

Download the latest Safari Technology Preview to stay at the forefront of the web platform and to use the latest Web Inspector features.

We love hearing from you. To share your thoughts on Safari 17.1, find us on Mastodon at @[email protected] and @[email protected] . Or send a reply on X to @webkit . If you run into any issues, we welcome your feedback on Safari UI, or your WebKit bug report about web technologies or Web Inspector. Filing issues really does make a difference.

You can also find this information in the Safari 17.1 release notes .