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Notify web extension native process of user default changes
My Mac app and its Safari web extension share an app group, and I want to notify the web extension native process when the app makes a change to the app group NSUserDefaults, but I can't find a good way to do this. According to the documentation, "You can use key-value observing to register observers for specific keys of interest in order to be notified of all updates, regardless of whether changes are made within or outside the current process." In my testing, however, this doesn't work in the web extension process. I'm using NSUserDefaults addObserver forKeyPath, but observeValueForKeyPath never gets called. I've also tried NSDistributedNotificationCenter, but the web extension process doesn't receive the notifications sent by the main app. Are either of these supposed to work? If not, are there any alternatives?
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78
Apr ’25
Referer Header is not included for requests in WKWebView
"The Referer header allows a server to identify referring pages that people are visiting from or where requested resources are being used. " This header is never forwarded to server when the user is browsing the website in a WebView. This is properly maintained by other browsers but not in-app. How do I include it?
Topic: Safari & Web SubTopic: General
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Apr ’25
New WebView in iOS 26 Pull To refresh support
The new WebView implementation in *OS 26 versions is a very valuable addition to the SwiftUI toolset. I was experimenting with it and was wondering how to implement a Pull To Refresh. While this was easily achievable with the "old" WKWebView I was not able to find an API to implement, for example, a page reload when the user uses a pull to refresh gesture. I tried to attach to a .refreshable(_:) modifier to the WebView but without success. Is there an official API for that or should maybe .refreshable(_:) already work and it's just a bug or is it simply not yet supported? Here is a minimal example I was trying but didn't succeed: struct ContentView: View { @State private var page = WebPage() var body: some View { NavigationStack { WebView(page) .refreshable { page.reload() } } } } Any help is much appreciated. Thank you!
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228
Jul ’25
Issue with External Browser on Sign In (Privy SDK limitation)
Hello Apple App Review Team, We are using Privy to enable sign in with Farcaster in our app. Privy is a 3rd party authentication SDK, and it currently opens the authentication URL using the system browser. Unfortunately, this behavior is handled internally by Privy and we do not have access or control to override it in order to present the sign-in flow in-app using SFSafariViewController. We understand the importance of maintaining a seamless and secure user experience, and we fully support the use of SFSafariViewController or ASWebAuthenticationSession. However, since Privy does not expose an option to change this behavior at the moment, we are limited by their current implementation. We have reached out to the Privy team requesting a change or improvement that would allow us to use SFSafariViewController instead of the external browser. In the meantime, we would appreciate your guidance on how to proceed, or whether an exception could be granted due to this 3rd party SDK limitation. Thank you for your understanding and support.
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212
Jul ’25
After iOS 18.4, files are called multiple times in WKWebView
Since the transition to iOS 18.4, we have been having an issue where when loading an m3u8 file specified in the src attribute of a video tag in WKWebView, the ts file is loaded repeatedly. Are there any good ideas for this? Also, if there have been any changes to the specifications of WKWebView, we would appreciate it if you could let us know.
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360
May ’25
How do I add a UI to a Safari Web Extension?
I have a Safari Web Extension that successfully receives a message from a webpage and returns a response. I now want to add a user interface to the Safari Web Extension. How do I do this? I have modified the default template code as follow to add an NSAlert for testing. The modal runs, but no alert ever appears, and the code remains stuck at runModal. What is the correct way to add a UI to a webextension? - (void)beginRequestWithExtensionContext:(NSExtensionContext *)context {     id message = [context.inputItems.firstObject userInfo][SFExtensionMessageKey];     NSLog(@"Received message from browser.runtime.sendNativeMessage: %@", message);     NSAlert* alert = [[NSAlert alloc]init];     [alert setMessageText:message[@"request"]];     [alert setInformativeText:@"Hello"];     [alert runModal];     NSExtensionItem *response = [[NSExtensionItem alloc] init];     response.userInfo = @{ SFExtensionMessageKey: @{ @"id": message[@"id"], @"uuid": message[@"uuid"], @"contentType": message[@"contentType"], @"response": message[@"request"] } };     [context completeRequestReturningItems:@[ response ] completionHandler:nil]; } @end
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1.2k
Mar ’25
Safari Does Not Include topOrigin in WebAuthn clientDataJSON Despite crossOrigin: true
Hello, I’m working on a cross-origin WebAuthn implementation where a parent page embeds an iframe from a different origin to perform authentication. According to the WebAuthn Level 3 spec (Section 7.1.1), when crossOrigin is true, the clientDataJSON may include topOrigin—but Safari does not seem to populate this field. Observed Behavior: Chrome/Firefox: Include topOrigin in clientDataJSON when crossOrigin: true. Safari (macOS/iOS): Omits topOrigin even though crossOrigin is correctly set to true. Example clientDataJSON from Safari: { "type": "webauthn.get", "challenge": "...", "origin": "https://iframe-origin.example.com", "crossOrigin": true // Missing `topOrigin` (expected: parent origin) } Questions: Is this an intentional omission in Safari for privacy/security reasons? Are there specific requirements (e.g., HTTP headers, permissions policies) needed for Safari to expose topOrigin? Is there a known workaround to reliably obtain the top-level origin in cross-origin WebAuthn flows? System Info: Version 18.4 (20621.1.15.11.10) OS: Sequoia Version 18.4 (20621.1.15.11.10) Reproduction Steps: Parent page (https://parent.example.com) embeds an iframe (https://webauthn-rp.example.com). The iframe calls navigator.credentials.get() with a WebAuthn challenge. Safari returns clientDataJSON with crossOrigin: true but no topOrigin. Code Snippet (iframe): const credential = await navigator.credentials.get({ publicKey: { challenge: new Uint8Array(/* ... */), rpId: 'webauthn-rp.example.com', allowCredentials: [], hints: [], userVerification: "preferred", } }); console.log(JSON.parse(atob(credential.response.clientDataJSON))); Has anyone encountered this? Any insights would be greatly appreciated!
Topic: Safari & Web SubTopic: General
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110
May ’25
ios drop file wrong file name
ios drop file wrong file name I use the following simple JS code to drag file from the browser to the desktop. Works perfect on MacOS. onDragStart(event, ucpView) { let file = new BrowserFile([this.file.fileContent], this.file.displayName, { type: 'application/ucp-scenario' }); const fileURL = URL.createObjectURL(file); event.dataTransfer.setData("DownloadURL", `application/octet-stream:${file.name}:${fileURL}`); event.dataTransfer.setData("text/uri-list", fileURL); } but on iOS it keeps nameing the file Text1.txt Text2.txt ... and ignores the DownloadURL whats the best way to get it workng on both OS?
Topic: Safari & Web SubTopic: General
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66
Apr ’25
Details of SFExtensionProfileKey?
Hi, I’m working with the SFExtensionProfileKey in my Safari Web Extension. As I understand it, this key is to get the UUID of the profile currently in use. However, it seems to be missing (no key in userInfo) when the default profile is active. Also, I haven’t found any API to get a profile’s human-readable name or list all available profiles. Could someone clarify: If the value of SFExtensionProfileKey is absent, can I safely assume the default profile is in use? Is there a supported way to get a profile’s display name? Does Safari expose an API for getting all profiles? Thanks in advance for your insights!
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141
May ’25
Custom WkWebsiteDatastore
Hey team, I've integrated custom WkWebsiteDatastore to manage profiling for different sessions. upon testing the WkWebsiteDataStore as its mentioned to be persistent But The storage can be accessed via identifier, But the session data in storage is absent, such as cookies caches all are cleared when app is relaunched is it the default behavior to be expected or there is some property missing causing the session data to be removed from storage.
Topic: Safari & Web SubTopic: General Tags:
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77
Mar ’25
macOS 15.0.1: Any supported way to auto‑enable a Safari App Extension on unmanaged Macs (no MDM)?
Hi all, Question: Can Apple confirm that, on macOS 15 without MDM/supervision, there is no supported API, entitlement, auth right, or config file that can enable a Safari App Extension without some form of user interaction? Environment • OS / Safari: macOS 15.0.1 (Sequoia), Safari 18.x • Distribution: Signed, notarized, stapled PKG installs a host app that contains a Safari App Extension • Management: No MDM allowed (and thus no supervision) • Goal: Have the extension come up enabled immediately after install, without requiring the user to click the checkbox in Safari Settings ▸ Extensions What we already know / tried Normal install flow – After PKG install, the extension shows up disabled. User must check the box to enable. SFSafariApplication.showPreferencesForExtension(...) – We can deep‑link the user to our row, but they still need to click “Enable.” Accessibility/UI scripting – We can script the click if the user grants our helper Accessibility permission. That still involves user interaction. .mobileconfig with Safari Extensions Management (AlwaysOn) – From what I can tell, this requires a supervised device enrolled in MDM. Installing that profile manually on an unsupervised Mac does not enforce the “AlwaysOn” state. Auth rights / Developer mode – Looked at auth.db rights like com.apple.Safari.allow-unsigned-app-extensions, and the Develop menu “Allow Unsigned Extensions.” Neither appears to auto‑enable a signed extension, and we don’t want to use private/unsupported APIs anyway. Thanks in advance for any clarification.
Topic: Safari & Web SubTopic: General
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342
Jul ’25
App clips - Launch appclip safari in html page inside safari on a button click. I have the testflight app
Subject: Help Needed with App Clip Implementation Hi Team, I need some assistance with implementing App Clip behavior in safari and also experimenting using TestFlight app. Default App Clip URL: https://appclip.apple.com/id?p=com.jey.ppclient-prod.appclip Website for App Clip Integration: https://appclip-sand.vercel.app/customer Current Behavior: Default App Clip URL: When I embed the default App Clip URL in an HTML tag like below: Launch App Clip it does launch the App Clip. but it says the appclip not supported in your region I've already added this configuration under Local Experience in App Store Connect. Website Integration: I’ve registered the site using the Advanced App Clip Experience. The apple-app-site-association file is in place. When I visit the site, the App Clip does launch as expected. What I Need Help With: I want to launch the App Clip from a custom button click, using either: The default App Clip URL, or The website URL (e.g., https://appclip-sand.vercel.app/customer) with additional query parameters like userId or sessionId. Is there a supported way to achieve this—perhaps through JavaScript or a specific tag setup that works with either Local or Advanced Experience? Your guidance would be greatly appreciated. Thanks, Jey
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105
Jun ’25
Is this path within launchd legitimate?
Command: com.apple.WebKit.Networking Path: /private/preboot/Cryptexes/OS/System/Library/ExtensionKit/Extensions/NetworkingExtension.appex/com.apple.WebKit.Networking Identifier: com.apple.WebKit.Networking Version: ??? (8621.3.11.10.3) Resource Coalition: "com.apple.mobilesafari"(1005) Architecture: arm64e Parent: launchd [1] PID: 1708
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147
Sep ’25
Suggestions for OAuth2 in Swift
Hello! I have a few questions about integrating an OAuth2 API into my Swift application. I am using this API to access user data from the website (users will authenticate themselves within the app). I have seen other apps use this API in the way that I am describing it so I know that it is possible. However, I am not sure how to implement it. Are there any recommended ways to use an OAuth2 API in my application? The API that I am using does not specifically say that it supports PKCE. However, I have heard from some sources that it does. If it does not support PKCE, how do I still create a secure app infrastructure that will pass App Store Review? At a more basic level, what is the difference between OAuth2 and PKCE? What should I use in my app? Are there any resources to learn a little bit more about these protocols so that I understand them better? Thanks!
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82
Jun ’25
Can I use allowFileAccessFromFileURLs to access local html file in my Project and not get appStorereview
We are currently implementing the payment flow, and for handling payment details — including card entry and validation — we are utilizing a WKWebView. The webview securely loads the payment provider’s page, ensuring sensitive information such as card numbers are entered and validated directly within the web context. I’d like to clarify that this change has not yet been released to Production. As part of a feature enhancement to our existing payment flow, we are transitioning to a new payment vendor, SnapPay. While trying to load the SnapPay URL embedded within an iFrame in our iOS app, I observed the following error in the Xcode console. While this error may be generic, I wanted to highlight it: 825a18 - [pageProxyID=7, webPageID=8, PID=67346] WebPageProxy::didFailLoadForFrame: frameID=24, isMainFrame=0, domain=NSURLErrorDomain, code=-999 Upon investigating, we compared the headers from our existing payment URL and SnapPay's URL, and found that SnapPay includes the following Content-Security-Policy (CSP) header: Content-Security-Policy: frame-ancestors ... "Content-Security-Policy" value="default-src 'self'; script-src 'self' https://hcaptcha.com https://.hcaptcha.com https://code.jquery.com https://www.gstatic.com https://code.jquery.com/jquery-3.3.1.min.js https://test.lightbox.cardx.com/v1/lightbox.min.js https://www.ssa.gov/accessibility/andi/ https://c.evidon.com 'unsafe-inline' 'unsafe-eval'; style-src 'self' https://hcaptcha.com https://.hcaptcha.com https://fonts.googleapis.com/css https://stage.snappayglobal.com/Resource/ https://www.ssa.gov/accessibility/andi/andi.css 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' *.googleapis.com *.gstatic.com ; connect-src 'self' https://demo1.cditechnology.com https:; form-action https://hcaptcha.com https: 'self' *.ipg-online.com secure.bluepay.com https://test.api.lightbox.cardx.com https://3ds-acs.test.modirum.com/ https://demo1.cditechnology.com/; frame-ancestors https://snappaydirect-perf.fiserv.com 'self' file: https: http; frame-src .snappayglobal.com 'self' https://hcaptcha.com https://.hcaptcha.com https: https://www.google.com .ipg-online.com secure.bluepay.com https://.cardconnect.com https://test.api.lightbox.cardx.com/ https://test.lightbox.cardx.com https://paywithcardx.com/payment/auth.cgi securepayments.cardpointe.com *.cardpointe.com https://3ds-acs.test.modirum.com/ https://www.yokohamatire.com http://uat1-txt.ad.portal.texas.gov https://uat1-txt.ad.portal.texas.gov " After multiple working sessions with the SnapPay team, we were able to confirm that when they disable CSP or remove the frame-ancestors directive, the iFrame loads successfully within our app. However, SnapPay cannot change on their CSP. To enable the iFrame to load in the iOS app, we added the following line of code: webView.configuration.preferences.setValue(true, forKey: "allowFileAccessFromFileURLs"). This resolved the issue with loading the iFrame. Note: the file being loaded is a local .html file,. Before submitting this update to the App Store, I’d like to confirm whether this usage of allowFileAccessFromFileURLs is acceptable for App Store review. I wanted to confirm that with this change is there a security concern for WKWebview?
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154
Apr ’25
iOS 26 WKWebView load url contain “#” will cancel when start load
0x158c2ce18 - [pageProxyID=33, webPageID=34, PID=883] WebPageProxy::didFailProvisionalLoadForFrame: frameID=4294967298, isMainFrame=1, domain=NSURLErrorDomain, code=-999, isMainFrame=1, willInternallyHandleFailure=0 Error Domain=NSURLErrorDomain Code=-999 "已取消" UserInfo={_NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <9A09D8F8-351D-4BE3-A1F7-0E2E325DC7BA>.<4>, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDataTask <9A09D8F8-351D-4BE3-A1F7-0E2E325DC7BA>.<4>" ), NSLocalizedDescription=已取消, _WKRecoveryAttempterErrorKey=<WKReloadFrameErrorRecoveryAttempter: 0x159acf6c0>, networkTaskDescription=LocalDataTask <9A09D8F8-351D-4BE3-A1F7-0E2E325DC7BA>.<4>, NSErrorFailingURLStringKey=https://oamobile.zmmc.com.cn:28385/pages/Reports/ZBReport.aspx?ShowInLegend=true&appid=69b487001fcc11bc30c7344e50768c3c&userid=9784299b-cced-4702-91b0-0476511ba8d2, NSErrorFailingURLKey=https://oamobile.zmmc.com.cn:28385/pages/Reports/ZBReport.aspx?ShowInLegend=true&appid=69b487001fcc11bc30c7344e50768c3c&userid=9784299b-cced-4702-91b0-0476511ba8d2, networkTaskMetricsPrivacyStance=Unknown} Failed to terminate process: Error Domain=com.apple.extensionKit.errorDomain Code=18 "(null)" UserInfo={NSUnderlyingError=0x159bd1830 {Error Domain=RBSRequestErrorDomain Code=3 "No such process found" UserInfo={NSLocalizedFailureReason=No such process found}}} After upgrade to ios 26, if WKWebView load url which did not contain "#" will always ok. but load url contain “#” will cancel when start load, then result in white screen
Topic: Safari & Web SubTopic: General Tags:
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284
Jun ’25
Issue sending web push notification to iOS
Hello all, I'm building a web application in ASP.NET MVC (.NET Framework 4.7.2), from this web app I need to send push notifications to users. For the ones who are logged in with windows/android, everything works as expected, but I can't manage to get it work on the apple side. If I use the same methods to subscribe to push notifications, it shows me the popup that asks the user to enable push notifications, and then I get an endpoint like this: https://web.push.apple.com/QKC1Muic0H7... It doesn't work using this (taking the part after https://web.push.apple.com/), I keep getting "Bad device token" (trying to send the notification via APNS). Then I found out that there is another method to register the device from the frontend, and this one should give me the real device token: window.safari.pushNotification.requestPermission But this one doesn't show me the popup, it gives me "denied" without a reason. I'm trying to a test application which is here https://pwa.vctplanner.it, the web push id is web.it.vctplanner, I created a push package downloadable from POST https://pwa.vctplanner.it/api/v2/PushPackages/web.it.vctplanner, and the code from the frontend is this: function registerSafariPush() { // Controlla se Safari Push Notifications è disponibile if (!('safari' in window) || !('pushNotification' in window.safari)) { console.log("Safari Push Notifications non supportate su questo browser."); return; } // Il tuo Website Push ID registrato su Apple Developer var websitePushId = "web.it.vctplanner"; // Controlla lo stato della permission var permissionData = window.safari.pushNotification.permission(websitePushId); switch (permissionData.permission) { case 'default': // L'utente non ha ancora deciso window.safari.pushNotification.requestPermission( 'https://pwa.vctplanner.it', // URL del server che serve il Push Package websitePushId, {}, // dati opzionali da inviare al server function (permission) { if (permission.permission === 'granted') { console.log("Notifiche push abilitate!"); sendSubscriptionToServer({ endpoint: permission.deviceToken }); } else { console.log("Notifiche push non abilitate dall'utente."); } } ); break; case 'denied': // L'utente ha negato console.log("Notifiche push negate."); break; case 'granted': // L'utente ha già autorizzato console.log("Notifiche push già autorizzate."); sendSubscriptionToServer({ endpoint: permissionData.deviceToken }); break; } } Any suggestions of what I'm missing? Is there a complete guide to how generate the push package? Thank you
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280
Sep ’25