Our team has implemented a video player using the HTML5 tag, but we have identified an issue with loading media files. While Safari on iOS 18.0 downloads each TS file listed in the m3u8 playlist correctly, on iOS 18.4 and 18.5, a single TS file is downloaded repeatedly. Our statistics indicate that approximately six requests are made per second for the same TS file. Is this intended behavior? If not, are there any known workaround or solutions? If this issue is due to the OS or browser, are there any plans to address it in iOS 18.6 or a future release? Could you advise on the proper channel to submit a bug report for this issue? Similar issues have been reported in the past with WKWebView. The previous thread is here: https://developer.apple.com/forums/thread/784134

Hello Apple Developer Community, I'm experiencing an issue with PDF link interaction in WKWebView that appears to be specific to iOS 26. Problem Description: I'm loading a PDF in WKWebView.The links may vary widely and are not necessarily DPF, so I need to load them using WKWebView. On iOS versions prior to 26, links within the PDF are clickable and work correctly. On iOS 26, the same links are not clickable (no response when tapped). Expected Behavior: PDF links should remain clickable and functional across all iOS versions. What I've Tried: Tested opening the PDF directly in Safari on iOS 26 - links still not clickable This suggests the issue might be related to changes in the system's PDF rendering engine Reproduction Steps: Load the PDF URL in WKWebView Navigate to page 12 Attempt to tap the link Environment: Test Devices: iPhone 15(26.0 ) / iPhone 16 Pro Max(18.0.1 ) Xcode: 16.2 Questions: Is this an intentional change in iOS 26's PDF handling or WKWebView? If so, is there a new API or configuration to restore link interactivity? Any guidance or suggestions would be greatly appreciated!

I'm developing a web extension for Safari on iOS using MV3. The extension is working fine in Chrome, but in Safari I experience some seemingly random issues. I would like to debug it, but here is my problem. I have my iPhone connected via cable to Mac, and it works fine with XCode, so I assume this part is OK. I open Safari or Safari Tech Preview (doesn't matter) on my Mac, developers options are enabled, and in the Develop menu, under my iPhone section, there are things I can debug. There is an entry "[Ext name] - Extension Service Worker" but when I click it, it's empty. Web inspector pops up, but there are no network requests, no logs, nothing. I know the extension is working, because I can stream log to my HTTP server, but I don't see them here at all. I can use console to trigger commands like chrome.storage.local.get(null, console.log) and it shows my local store, so why I don't see any logs? Also, the background script is not visible in the Sources tab, just one weird request: navigator.serviceWorker.register('safari-web-extension://E3449EA7-EC25-4696-8E6C-[ID HERE]/background.js'); </script> Any ideas what went wrong? The entire team of 4 people has the same issue and we can't move forward because of that. Also, the Develop => Service workers or any other menu section doesn't show my service worker. Logs for websites running on my phone are visible and in general web inspector for them works fine.

Hey Guys My PWA video playback and even youtube videos stopped working after updating iOS to 26.0.1. The video thumnails appear fine and if i try to play the video, it remains stuck. If i restart the phone, the video plays for a second in the PWA and then stops again and entire app gets stuck. Request apple team to fix this issue at the earliest. This is hampering all my iOS users who install the PWA on their device homescreen and use it as app. FYI strangely EVERYTHING WORKS FINE ON iOS SAFARI browser including videos playback If i open it as a web app. so this seems like a specific PWA issue on latest ios 26.0.1

Enhancement in managing tabs in Safari It would really be awesome to bring the fascinating tab management feature of Arc Browser to Safari across iOS, iPadOS and macOS. Especially below listed features; Multitask Create Organize Rev Up Release Notes For further info , here is the official link of Arc Browser, https://resources.arc.net/hc/en-us/categories/16435255982103-Features.

This is my first time to post on this forum. If there are something we didn't notice, please tell me. Thanks. Background We're using canvas to provide a web component to marketing. https://demo.mescius.jp/spreadjs/BenchmarkSample/ Problem Recently we have met an issue from customer. He is using iPad 10th to access the web component but when he tries to scroll it and it's very slow on iPad 10th. His iPad OS version is 17.7 and this issue also can be reproduced on our iPad 10th with iPad OS 18.0.1. But if we use iPad 9th with iPad OS 17.7 and 18.0.1, things are fine and there isn't any performance issue. We developer took some time investigating and found it's because of iPad 10th's safari takes longer time to paint each frame. On iPad 9th, it needs nearly 10ms to paint each frame. But on iPad 10, it needs nearly 70ms to paint each frame. Also we can provide simple code for you to check the different. We tried to simulate the repaint when user is scrolling. You can see on iPad 9th, it will be 2~3ms but on iPad 10th, it will be more than 10ms for each frame. test-ipad10.html It has been happening on iPad 10th only with iPad OS 17.6/17.7/18.0. This will be a big problem for us because it means on the iPad 10th (the latest iPad, non Pro or Air), it can't be used. Question Is there anyone knowing similar issue with this one? And do you know how to solve it on iPad 10?

We are using WebKit in our app and recently started noticing a crash occurring on iOS 17 and earlier versions. The crash log shows the following error: Thread 0 Crashed: 0 WebKit 0x00000001a38593cc WebKit::WebPageProxy::updateActivityState(WTF::OptionSet<WebCore::ActivityState>) + 220 (WebPageProxy.cpp:2544) 1 WebKit 0x00000001a39cb1e0 WebKit::WebPageProxy::dispatchActivityStateChange() + 132 (WebPageProxy.cpp:2653) 2 WebKit 0x00000001a3f541f8 WTF::Detail::CallableWrapper<WebKit::WebPageProxy::scheduleActivityStateUpdate()::$_5::operator()() const::'lambda'(), void>::call() + 52 (Function.h:53) 3 JavaScriptCore 0x00000001a48317ec void WTF::dispatchWorkItem<WTF::(anonymous namespace)::DispatchWorkItem>(void*) + 60 (WorkQueueCocoa.cpp:48) 4 libdispatch.dylib 0x00000001964f5dd4 _dispatch_client_callout + 20 (object.m:576) 5 libdispatch.dylib 0x00000001965045a4 _dispatch_main_queue_drain + 988 (queue.c:7898) 6 libdispatch.dylib 0x00000001965041b8 _dispatch_main_queue_callback_4CF + 44 (queue.c:8058) 7 CoreFoundation 0x000000018e623710 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 16 (CFRunLoop.c:1780) 8 CoreFoundation 0x000000018e620914 __CFRunLoopRun + 1996 (CFRunLoop.c:3149) 9 CoreFoundation 0x000000018e61fcd8 CFRunLoopRunSpecific + 608 (CFRunLoop.c:3420) 10 GraphicsServices 0x00000001d34d01a8 GSEventRunModal + 164 (GSEvent.c:2196) 11 UIKitCore 0x0000000190c5890c -[UIApplication _run] + 888 (UIApplication.m:3713) 12 UIKitCore 0x0000000190d0c9d0 UIApplicationMain + 340 (UIApplication.m:5303) After investigating, we found that this crash was addressed in this https://github.com/WebKit/WebKit/pull/24778 WebKit PR. However, our app is still crashing for users on older iOS versions where this fix is not available. Is there a known workaround to prevent this crash on affected iOS versions? Any guidance would be greatly appreciated.

Is ServiceWorker supported on WKWebView? As per Mozilla Developer Network(MDN Web) docs[1] its not supported, but our research shows that ServiceWorker becomes available for a domain in WKWebView 1) if the domain is allowlisted in app-bound domains[2] or 2) if app is registered as default browser(this can not be considered for our app as its not a browser). How to enable ServiceWorker on WKWebView? Is adding domain as app-bound domain the right/only way to enable ServiceWorker on WKWebView? We didn't find any official documentation about this. Can WebView get ServiceWorker support by default without enabling app bound domains since that is not an option for our app? Our app needs to support more than 10 domains. Powerful APIs such as JavaScript injection, cookie manipulation, event handlers are by default available to all domains/WebView instances even if App doesn't enable app-bound domains. Is it possible to do same for ServiceWorker? If ServiceWorker can not be supported by default then can Apple provide a feature by which ServiceWorker will be enabled in App for all the domains? Apple enforces maximum of 10 app-bound domains. Is it possible to remove this limit and provide a way to dynamically add to this list at the time of a request? [1] https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker#browser_compatibility [2] https://webkit.org/blog/10882/app-bound-domains/

hi Testing on OS26 Public Beta 6. In Safari, if you enter x homepage and scroll, the tab bar sticks to the bottom and moves. Make the keyboard appear in the search window When scrolling down on the Safari homepage again, the issue of not being able to stick to the bottom appears. Is it because the liquid glass UI was applied this time? and safari bug? Please let me know if I'm missing anything

Dear Apple Developer Experts, We're experiencing an intermittent issue with WKWebView in our macOS application where local HTML file access is occasionally denied by the sandbox, despite proper implementation and permissions. We seek your guidance in understanding and resolving this issue. Issue Description: The WKWebView occasionally fails to load local HTML files stored in the app's Contents/Resources directory Error occurs in WebKit Networking Process with sandbox denial Issue is intermittent and can be resolved by app restart or WebKit Networking Process restart Affects all local HTML files in the same directory once the issue occurs Technical Details: Error from Kernel Log: 2025-02-07 14:57:17.179821 +0800 kernel Sandbox: com.apple.WebKit.Networking(58661) deny(1) file-read-data /Applications/DingTalk.app/Contents/Resources/webcontent/contact-2024.html WKWebView Delegate Error (captured in WKNavigationDelegate method): (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation withError:(NSError *)error Error Details: Domain: NSPOSIXErrorDomain Code: 1 Description: "Operation not permitted" UserInfo: { networkTaskMetricsPrivacyStance: Unknown, _NSURLErrorFailingURLSessionTaskErrorKey: LocalDataTask &lt;3694CA1E-481B-4E06-975D-E3A56AD56C0F&gt;.&lt;1&gt;, _kCFStreamErrorDomainKey: 1, _kCFStreamErrorCodeKey: 1 } Key Observations: Error is captured in WKNavigationDelegate's didFailProvisionalNavigation method The issue affects all local HTML files in the same directory once it occurs Temporary workarounds we've discovered: Restarting the application completely resolves the issue Without restarting the application, terminating the "WebKit Networking Process" via Activity Monitor causes the process to automatically restart, and this resolves the issue and load works again Additional Information: We've collected complete system diagnostics (system_logs.logarchive) at the time of failure The issue appears similar to discussions in Apple Developer Forums (https://developer.apple.com/forums/thread/110072), though we're uncertain if it's the same root cause We've prepared a minimal demo project demonstrating: Our release version app can be downloaded from: https://dtapp-pub.dingtalk.com/dingtalk-desktop/mac_dmg/Release/M1-Beta/DingTalk_v7.6.45_43521682_universal.dmg?spm=0.0.0.0.UuwovG&amp;file=DingTalk_v7.6.45_43521682_universal.dmg for examining our app's codesign, sandbox, and entitlements configurations if needed Important Investigation Finding: We attempted to simulate the issue by using chmod 000 /path/to/test.html, but this produces a different error: CopyError Domain=NSURLErrorDomain Code=-1102 Description="You do not have permission to access the requested resource." UserInfo={ NSLocalizedDescription=You do not have permission to access the requested resource., NSErrorFailingURLStringKey=file:///Users/sunus/Library/Developer/Xcode/DerivedData/WKWebViewLocalDemo-eumardnlfbmwgnhkaadglsrrhzhs/Build/Products/Debug/WKWebViewLocalDemo.app/Contents/Resources/test.html, NSUnderlyingError=0x600003aedc50 {Error Domain=kCFErrorDomainCFNetwork Code=-1102 "(null)"} } This error is distinctly different from our original issue's "Operation not permitted" error, suggesting that the sandbox denial we're experiencing is not a simple file permission issue. Questions: Is this a known issue with the WebKit sandbox in recent macOS versions? Are there recommended best practices or workarounds to prevent this sandbox denial? Could this be related to the WebKit Networking Process's sandbox configuration? Are there additional diagnostics or logs we should collect to help investigate this issue? We appreciate your assistance in investigating this issue. Please let us know if you need any additional information or clarification. STEPS TO REPRODUCE Open App Then loads the local file in /WKWebViewLocalDemo.app/Contents/Resources/test.html PS, We also submit a DTS &amp; Feedback DTS:Case-ID: 11876957 Feedback-ID: FB16493282 sysdiagnose is in the Feedback-ID: FB16493282 is uploaded

Hi all, Chrome has it already - animation-timeline aka scroll-animations. I can nowhere find any informations on what's the status in Safari/Webkit. Seems like they do not have it on the agenda at all? Does anyone know anything - I wanted to push a feature request for that - but also seem there is no feature request list anymore for webkit. See: https://www.w3.org/TR/scroll-animations/ Cheers and kind regards!

I'm testing web extension to safari on iOS. I've built and added extension application to simulator, but on safari settings shows no extensions. I'm using Xcode 16.3 beta 2 with Simulator iOS 18.4 (22E5216h), tested on iPhone 16. https://app.screencast.com/oUq4EMonmfT7u https://app.screencast.com/MCquvHzmZi8QS

I am creating a Safari Web Extension. There are two calls let say, call1 and call2 which gets executed in sequence by browser, call1 gives a 302 type response and redirects to call2. When creating DNR rule for adding "Cookie" in the request header of call1, the same cookie gets added to the request header of call2 as well(Same is the case for other headers/custom headers as-well). Because of this the set-cookie present in response header of call1 is not sent in the request header of call2, and returns 400 response. The same setting is working fine for other browsers chrome & firefox. Is this a bug or DNR works differently for safari ? currently "webRequestBlocking" works in safari for manifest v3, is there any development of it getting removed just like it's removed in chrome in mv3.

Hi, I'm encountering an issue with the Clipboard API's writeText() method in Safari. It throws a NotAllowedError even when triggered by a user action (selecting an option from a <select> element). Is this expected? This issue seems specific to Safari, as the same code works perfectly in Firefox and Chrome. Perhaps I should send feedback to Apple, but I'd like to post it here first in case I misunderstand something. Problem In Safari, when I try to copy text to the clipboard using navigator.clipboard.writeText() within an input event listener attached to a <select> element, it fails with the following error: NotAllowedError: The request is not allowed by the user agent or the platform in the current context, possibly because the user denied permission. Environment Safari 18.2 (20620.1.16.11.8) Technology Preview 210 macOS Sequoia 15.2 (24C101) Example I've created a minimal reproducible example on CodePen: https://codepen.io/mshibanami/pen/LEPdxXZ Here's the relevant JavaScript code from the example: selectElement.addEventListener('input', async (event) => { const selectedText = event.target.options[event.target.selectedIndex].text; try { await navigator.clipboard.writeText(selectedText); alert(`Text copied to clipboard: ${selectedText}`); } catch (err) { alert('Failed to copy text to clipboard: ' + err); } }); Firefox and Chrome handle this code without any issues, successfully copying the text to the clipboard, but not Safari. Possible Cause I suspect this issue might be related to WebKit's User Activation API. It seems like Safari is not correctly recognizing the input or change event on a <select> element as a valid user activation for the Clipboard API, even though it is initiated by a user gesture. Questions Is this behavior unexpected? Should Safari allow the Clipboard API to work in this context? (Technically, this might be expected as of now, as such events are not explicitly described in https://webkit.org/blog/13862/the-user-activation-api/.) Any insights or suggestions would be greatly appreciated. Thanks!

Adding Stack Trace for your reference: thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BREAKPOINT (code=1, subcode=0x1a6efe5b8) frame #0: 0x00000001a6efe5b8 WebCoreWebCore::BaseAudioSharedUnit::BaseAudioSharedUnit() + 668 frame #1: 0x00000001a6efe044 WebCoreWebCore::CoreAudioSharedUnit::singleton() + 80 frame #2: 0x00000001a9521fe4 WebCoreWebCore::CoreAudioCaptureSource::create(WebCore::CaptureDevice const&, WebCore::MediaDeviceHashSalts&&, WebCore::MediaConstraints const*, std::__1::optional<WTF::ObjectIdentifierGeneric<WebCore::PageIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>>) + 360 frame #3: 0x00000001a94f180c WebCoreWebCore::RealtimeMediaSourceCenter::getUserMediaDevices(WebCore::MediaStreamRequest const&, WebCore::MediaDeviceHashSalts&&, WTF::Vector<WebCore::RealtimeMediaSourceCenter::DeviceInfo, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&, WTF::Vector<WebCore::RealtimeMediaSourceCenter::DeviceInfo, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&, WebCore::MediaConstraintType&) + 356 frame #4: 0x00000001a94f22cc WebCoreWebCore::RealtimeMediaSourceCenter::validateRequestConstraintsAfterEnumeration(WTF::Function<void (WTF::Vector<WebCore::CaptureDevice, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&&, WTF::Vector<WebCore::CaptureDevice, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&&)>&&, WTF::Function<void (WebCore::MediaConstraintType)>&&, WebCore::MediaStreamRequest const&, WebCore::MediaDeviceHashSalts&&) + 356 frame #5: 0x00000001a94fb394 WebCoreWTF::Detail::CallableWrapper<WebCore::RealtimeMediaSourceCenter::enumerateDevices(bool, bool, bool, bool, WTF::CompletionHandler<void ()>&&)::$_0, void>::~CallableWrapper() + 164 frame #6: 0x00000001a814bbe8 WebCoreWTF::Detail::CallableWrapper<WebCore::AVCaptureDeviceManager::refreshCaptureDevicesInternal(WTF::CompletionHandler<void ()>&&, WebCore::AVCaptureDeviceManager::ShouldSetUserPreferredCamera)::$_0::operator()()::'lambda'(), void>::call() + 520 frame #7: 0x00000001ab7f1aac JavaScriptCoreWTF::RunLoop::performWork() + 524 frame #8: 0x00000001ab7f1880 JavaScriptCoreWTF::RunLoop::performWork(void*) + 36 frame #9: 0x00000001935e7d0c CoreFoundationCFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 28 frame #10: 0x00000001935e7ca0 CoreFoundation__CFRunLoopDoSource0 + 172 frame #11: 0x00000001935e6a24 CoreFoundation__CFRunLoopDoSources0 + 232 frame #12: 0x00000001935e5c64 CoreFoundation__CFRunLoopRun + 840 frame #13: 0x000000019360a730 CoreFoundationCFRunLoopRunSpecific + 572 frame #14: 0x00000001e0fb5190 GraphicsServicesGSEventRunModal + 168 frame #15: 0x0000000196239f34 UIKitCore-[UIApplication _run] + 816 frame #16: 0x0000000196238164 UIKitCore`UIApplicationMain + 336 frame #17: 0x000000010811bec4 AppName.debug.dylibmain at AppDelegate.swift:25:13 frame #18: 0x00000001bae06a58 dyldstart + 5964

I’m observing an intermittent issue with a Safari Web Extension on macOS 15.7 (Safari 26.0.1). After installing the Safari extension from the App Store, it appears under Settings → Extensions, but the enable checkbox is often missing. Sometimes, after restarting Safari multiple times, the checkbox becomes visible. However, even when I manage to enable the extension, reopening Safari often hides the checkbox again. However, I don't see this issue in safari 26 with macOS 26 I’d like to know if this behavior is a known issue with Safari 26 or macOS 15.7? Any workaround available?

Hello, I've got Smart App Banner set up on my website. However, I want to be able to measure the traffic coming from this banner to the app store / app (i.e. measure impressions/downloads). Apple documentation (https://developer.apple.com/help/app-store-connect/view-app-analytics/manage-campaigns/) says you can set up a campaign link and use it in the Smart Banner to track those who download / open the app store page using your smart banner (so that we can get attribution). However, there is no documentation at all in terms of how this should be added to the tag when implementing a Smart App Banner. I've tried so many different variations and none have tracked downloads. This includes a structure based on an example taken from WWDC from a few years back which also did not work. I would appreciate any help!

We have a JavaScript api that queries our Secure Browser to get the network information – signal strength, network name, plugged in/wifi. Everything worked fine through the Tahoe betas, still does. Now we are getting on the network name and this is breaking our UI. Was this an intentional change or a bug? The other two properties still appear to be working. And it works in all lower MacOS versions. We are currently obtaining it through AppleScript try   set ssid to do shell script "system_profiler SPAirPortDataType | awk '/Current Network Information:/ {getline; sub(/^ +/, ""); sub(/:$/, ""); print}'"   if ssid is equal to "" then     return "Not connected to any Wi-Fi network."   else     return ssid   end if on error errMsg   return "Error: " & errMsg end try

"The Safari web extension packager enables you to package and distribute your Safari extensions using App Store Connect from any web browser, without requiring a Mac or access to Xcode." I upload the unzipped folder I'd test in Chrome://extensions to the Safari web extension packager in App store connect. I get error: Embedded binary's bundle identifier is not prefixed with the parent app's bundle identifier. The only solution i've seen to this error involves xcode/a mac, being without which doesn't help

I'm using the new iOS 26 WebPage/WebView for SwiftUI in a NavigationStack. The initial load works as expected, but when loading items from the back/forward lists, the content jumps beneath the navigation bar: struct WebPageTestView: View { var webPage = WebPage() var body: some View { NavigationStack { WebView(webPage) .toolbar { Button("Back") { if let backItem = webPage.backForwardList.backList.last { webPage.load(backItem) } } Button("Forward") { if let forwardItem = webPage.backForwardList.forwardList.first { webPage.load(forwardItem) } } } } .task { webPage.isInspectable = true webPage.load(URL(string: "https://domchristie.co.uk/")) } } } I have run this on the iOS 26.0 and 26.1 Simulators and get the same issue. The demo website does not use any JavaScript. I was able to replicate this behaviour using a wrapped WKWebView and calling the .ignoresSafeArea(.all) modifier.