I'm working on a Safari web extension that uses the nativeMessaging facility to communication with native code. When I want to notify the javascript extension from the embedding application, I use SFSafariApplication::dispatchMessage. As per the documentation, this call ... ensures that Safari is launched and that your extension is running before delivering the message. Everything works fine when the background script is running. However, after the background script gets unloaded at some point in time (non persistent background page, default behavior for a manifest V3 extension), the background script is not reloaded by the message from the native app (background script still appears unloaded in the developer menu of Safari, double-checked using a counter stored in browser.storage.local incremented on message reception). In this case, the completion handler of the application gets no error (error == nil) as if the message was correctly delivered. I was able to reproduce this behavior with the sample app delivered for WWDC20 (after upgrading the manifest from v2 to v3 to make it non-persistent). Is it supposed to work ? What I'm doing wrong ?

We use a direct link mechanism in our app that attempts to open the app if it's already installed; otherwise, it redirects the user to the App Store. However, when the app is not installed, Safari displays an alert saying: "Safari cannot open the page because the address is invalid." This popup appears to be caused by attempting to open a custom URL scheme that doesn't resolve. what is the recommendation from apple to have a smooth transition to our mobile App Here’s a sample link we’re using: https://new.oneclear.com/Asset/fe5f7fb6-205a-40f8-9efe-71678361aa2c?t=NTA0NQ==

Hello Apple Developer Community, I currently have a Safari Web Extension on iOS that blocks certain URLs for users. I would like to provide the same functionality for Chrome on iOS. I understand that Chrome on iOS uses WebKit under the hood, and Safari Web Extensions can run in Safari, but I am unsure whether there is any way to implement URL blocking in Chrome for iOS—either via an extension, API, or other supported mechanism. Specifically, I’m looking for guidance on: Whether any browser extension (Safari, Chrome, or otherwise) can intercept or block web requests in Chrome on iOS. If not, what Apple-supported alternatives exist for implementing URL-blocking functionality for users of Chrome on iOS. Any best practices for maintaining a cross-browser URL-blocking solution for iOS users. I want to make sure my approach is aligned with Apple’s policies and platform capabilities. Any guidance or official references would be greatly appreciated. Thank you!

(Error) When using Safari to access an internal website during development (using a self-signed certificate), may encounter issues where backend data fails to be retrieved.

After updating to Safari 26.0 (on macOS Sequoia or Tahoe), the Declarative Net Request (DNR) API rule with "type": "redirect" no longer works as expected. When the rule is applied, the browser initially shows a banner at the top of the page: "This webpage was reloaded because a problem occurred." After the reload, the page fails to load and displays an error page with the message: "A problem repeatedly occurred with https://extensionworkshop.com/?test=true " This behavior is new in Safari 26.0. The same rule was working correctly in earlier Safari versions (17.x / 18.x).

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?

WKWebView has set the option to disable selection ("document. documentElement. style. webkitUserSelect='none ';") and long press ("document. documentElement. style. webkitTouchCallout='none';"). If there is text on one of the images in WebView, simply tap the image twice and then long press the text. The program will crash with the following error message: 0 CoreFoundation 0x185e058c8 __exceptionPreprocess + 164 1 libobjc.A.dylib 0x182d797c4 objc_exception_throw + 88 2 CoreFoundation 0x185e908d4 -[NSException initWithCoder:] + 0 3 QuartzCore 0x18678a874 CA::Layer::set_position(CA::Vec2<double> const&, bool) + 160 4 QuartzCore 0x1869a7270 -[CALayer setPosition:] + 52 5 UIKitCore 0x18c4ac564 -[UIView _backing_setPosition:] + 176 6 UIKitCore 0x18cefdf0c -[UIView setCenter:] + 220 7 UIKitCore 0x18cd9f794 -[_UIEditMenuContentPresentation _displayPreparedMenu:titleView:reason:didDismissMenu:configuration:] + 936 8 UIKitCore 0x18cd9f3c0 __54-[_UIEditMenuContentPresentation _displayMenu:reason:]_block_invoke + 104 9 UIKitCore 0x18ced1060 -[UIEditMenuInteraction _editMenuPresentation:preparedMenuForDisplay:completion:] + 384 10 UIKitCore 0x18cd9f2e4 -[_UIEditMenuContentPresentation _displayMenu:reason:] + 304 11 UIKitCore 0x18cd9f0d8 -[_UIEditMenuContentPresentation displayMenu:configuration:] + 64 12 UIKitCore 0x18ced0344 __58-[UIEditMenuInteraction presentEditMenuWithConfiguration:]_block_invoke + 260 13 UIKitCore 0x18ced1f8c __80-[UIEditMenuInteraction _prepareMenuAtLocation:configuration:completionHandler:]_block_invoke + 80 14 UIKitCore 0x18cc8403c __109-[UITextContextMenuInteraction _editMenuInteraction:menuForConfiguration:suggestedActions:completionHandler:]_block_invoke + 180 15 UIKitCore 0x18cc84584 __107-[UITextContextMenuInteraction _querySelectionCommandsForConfiguration:suggestedActions:completionHandler:]_block_invoke + 148 16 WebKit 0x1a05ae5d4 WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>::operator()(WebKit::DocumentEditingContext&&) + 64 17 WebKit 0x1a05bb468 WTF::Detail::CallableWrapper<WTF::CompletionHandler<void (IPC::Connection*, IPC::Decoder*)> IPC::Connection::makeAsyncReplyCompletionHandler<Messages::WebPage::RequestDocumentEditingContext, WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>>(WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>&&, WTF::ThreadLikeAssertion)::'lambda'(IPC::Connection*, IPC::Decoder*), void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) + 196 18 WebKit 0x19fcf5db8 WTF::Detail::CallableWrapper<WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRef<IPC::Encoder>&&, WTF::OptionSet<IPC::SendOption>, std::__1::optional<IPC::ConnectionAsyncReplyHandler>, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) + 64 19 WebKit 0x19fce54f0 IPC::Connection::dispatchMessage(WTF::UniqueRef<IPC::Decoder>) + 340 20 WebKit 0x19fcf5aa0 IPC::Connection::dispatchIncomingMessages() + 536 Will the official version have this issue?

The icon (new file downloaded) inside the search bar on Safari does not display after downloading a file. To update the search bar and display the icon you have to open the search bar and then close it again to see that a new file was downloaded.

At present, it is not possible to use deep linking without suffering the Smart banner being injected by Safari on each affected web page. This makes the experience of users choosing to browse an associated website significantly poorer as they have to see a Smart banner at the top of each page. People know there is an app store and an app – they don't need constantly reminding like it is still 2010. Anyone know where a relevant plea can be made to Apple to provide an alternative mechanism here as it damages the ethos of being able to simply use a web browser

After updating to the new iOS, in Safari, my overlays and backdrops using 100dvh no longer cover the full screen there's now a gap at the bottom. Switching to 100vh fixes it, but that causes scrolling issues on older Safari versions since 100vh includes extra height. Has anyone else experienced this? What's the recommended fix that works across iOS versions?

I have a working answerer-only WebRTC client to view video from a remote device. This client, works in all common web browsers (Chrome, Edge, Firefox, etc.) except in Safari. After trying to debug the problem, I noticed that after calling await peerConnection.setLocalDescription(answer); RTCPeerConnection.iceGatheringState never changes to the "gathering" state and stays the default initial "new" state. This is a problem because the ICE candidates can never be gathered and thus the client in Safari does not work at all. What is surprising and weird is that by explicitly calling setLocalDescription(), ICE gathering should start as mentioned in the documentation: https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/icecandidate_event. However, in Safari, this never happens. I experienced this issue in both Safari 18.x and 21.x versions.

I'm developing a cross-platform application using Tauri, which uses WebView technology as the GUI renderer. On macOS, it should be using WKWebView. Based on my tests, all applications developed with Tauri can only run at 60fps on macOS and cannot take advantage of ProMotion displays to achieve a 120fps refresh rate, whereas the same application can run at 120fps on other platforms. I have submitted this issue to Tauri on GitHub, and it appears that this cannot be resolved through external settings, but only by modifying the WKWebView code to support higher frame rates. Is there any possible solution to this?

I'm trying to sync authentication data from my iOS app to a Safari Web Extension using App Groups, but the extension isn't consistently receiving the data. Setup: App Group: group.com.airaai.AiraApp (configured in both app and extension) iOS app writes auth data using UserDefaults(suiteName: "group.com.airaai.AiraApp") Extension's Swift SafariWebExtensionHandler reads from App Groups in beginRequest() Extension's JavaScript reads from browser.storage.local Problem: Extension popup always shows "logged out" even when: User is logged into main iOS app Auth data exists in App Groups (verified via native module logs) Handler successfully writes test values to extension storage Current Behavior: Handler CAN read from App Groups ✅ Handler CAN write test values to extension storage ✅ But auth data doesn't appear in browser.storage.local when popup checks ❌ Popup reads empty keys even though handler logged writing them Code: // Handler reads from App Groups guard let sharedDefaults = UserDefaults(suiteName: "groupName") else { return } let authData = sharedDefaults.string(forKey: "auth_data") // Handler writes to extension storage (tried multiple suite names) let extensionDefaults = UserDefaults(suiteName: Bundle.main.bundleIdentifier ?? "") extensionDefaults?.set(authData, forKey: "oauth_token") extensionDefaults?.synchronize() // Popup reads from storage browser.storage.local.get(['oauth_token']).then(data => { console.log(data); // Always empty {} }); What I've tried: ✅ App Groups properly configured in both targets ✅ Extension has App Groups capability enabled ✅ Multiple UserDefaults suite names (bundle ID, bundle ID + suffix) ✅ Delayed sync attempts in handler ✅ Comprehensive logging Questions: What is the correct UserDefaults suite name for Safari extension storage on iOS? When does beginRequest() get called? Can it be triggered manually? Is App Groups the right approach, or should I use a different pattern? Alternatives I've considered: Deep link/redirect method (app opens Safari with token in URL) Content script intercepts URL and sends to background script Is this a supported approach for iOS Safari extensions? Any guidance or examples would be greatly appreciated!

Hi, I am developing an OpenType font with the following cursive feature. feature curs { lookup cursivejoinrtl; # RIGHT_TO_LEFT flag set between Hah, Meem, Yeh and final Meem lookup rehwawcursive; # RIGHT_TO_LEFT flag clear between Waw and Hah } curs; Here is the rendering of the word وحميم in TextEdit. Using HarfBuzz I got the following result. The same rendering problem occurs when using Safari. It seems that is related to Core Text. I reported the issue to Feedback Assistant over a year ago but haven't had a response yet. So I'm posting the problem on this forum. Any support on this matter would be greatly appreciated.

version:26.0-23A5308g Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [nan 103.667]. Layer: <CALayer:0x15793f720; position = CGPoint (0 0); bounds = CGRect (0 0; 0 48); delegate = <_UIEditMenuListView: 0x10f962f80; frame = (nan 0; 0 48); anchorPoint = (inf, 0); alpha = 0; layer = <CALayer: 0x15793f720>>; sublayers = (<CALayer: 0x155964e70>, <CALayer: 0x15793eaf0>); opaque = YES; allowsGroupOpacity = YES; anchorPoint = CGPoint (inf 0); opacity = 0>'

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?

This post is an effort to draw attention to a regression in Tahoe that has a large impact on our app. This bug was filed during seed 3 but remains open: FB18869578: Regression: WebView fails to render fonts registered with CTFontManagerRegisterFontURLs or ATSApplicationFontsPath The gist of it is that WKWebView fails to render text that is styled with a “font-family” that references a font that has been loaded into the app using either the ATSApplicationFontsPath Info.plist key or loaded dynamically with CTFontManagerRegisterFontURLs. The area where the text should be is just blank. There is more detail and a reproducer in the bug referenced above. We really hope this bug can get fixed before GA. If anyone else would like to try and reproduce it, you can download a test case from here: https://e3supportuploads.s3-accelerate.amazonaws.com/8739959ce24de40fa462798a532aaa99fbfc9affba4f2a3e71d397f9e30d2604

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!

I’m developing a Safari App Extension and I want to debug the background.js script. However, I can’t find any tool or option to do this. When I run the extension from Xcode using the ProjectName Extension (macOS) scheme, I expect to see a “ProjectName” item under the Develop → Web Extension Background Content menu. But there’s nothing there. Has anyone encountered the same issue? How did you fix it? Environment: Manifest Version: V3 Safari: 26.0.1 (21622.1.22.11.15) Xcode: 26.0.1 (17A400)

Hi guys, I'm trying to use sign in with apple in javascript, I followed the guider in the website, and almost find everything I can find in Google, but nothing help, here is my situation: I create a new App: com.yuhan.test.app I create a new service ID: com.yuhan.test.service configure a domain and return url domain: tts.perterpon.com returnURL: https://tts.perterpon.com/login create a new key for Sign In with Apple. my html code is here, it's easy, but it always told me invalid_client, I think I have done anything I need to do, can somebody help me? Thank you so much. you can test my online web site: https://tts.perterpon.com/login.html ` const buttonElementNew = document.getElementById('appleid-signin'); buttonElementNew.addEventListener('click', async () => { try { const data = await AppleID.auth.signIn() console.log('Try/Catch Data', data.authorization.id_token); const formData = new FormData(); formData.append("token", data.authorization.id_token); await fetch("", { method: "POST", body: formData, }); // Handle successful response. } catch (error) { // Handle error. } }); </script>