Enable web views and services in your apps.

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Safari Extension Not Appearing or Disappearing Intermittently on iPad (iOS 18.3)
I’m encountering an issue with a Safari extension bundled with our main application (F-Secure). The extension is not appearing consistently in Safari settings on a customer’s iPad running iOS 18.3. Below are the details of the issue: Issue Description The Safari extension is bundled with the main app (F-Secure). After installing the app, the extension should automatically appear in Settings > Safari > Extensions, where the user can enable it. On the customer’s iPad, the extension is missing from the Safari settings. It briefly appeared once but then disappeared again.
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349
Mar ’25
Safari Web Extensions & NSXPCConnection
I have a basic setup following WWDC 2020 on Safari Web Extensions and another one on XPC. The video even mentions that one can use UserDefaults or XPC to communicate with the host app. Here is my setup. macOS 15.2, Xcode 16.2 A macOS app (all targets sandboxed, with an app group) with 3 targets: SwiftUI Hello World web extension XPC Service The web extension itself works and can update UserDefaults, which can then be read by SwiftUI app - everything works by the book. The app can communicate to the XPC service via NSXPCConnection - again, everything works fine. The problem is that the web extension does not communicate with XPC, and this is what I need so that I can avoid using UserDefaults for larger and more complex payloads. Web Ext handler code: class SafariWebExtensionHandler: NSObject, NSExtensionRequestHandling { func beginRequest(with context: NSExtensionContext) { // Unpack the message from Safari Web Extension. let item = context.inputItems[0] as? NSExtensionItem let message = item?.userInfo?[SFExtensionMessageKey] // Update the value in UserDefaults. let defaults = UserDefaults(suiteName: "com.***.AppName.group") let messageDictionary = message as? [String: String] if messageDictionary?["message"] == "Word highlighted" { var currentValue = defaults?.integer(forKey: "WordHighlightedCount") ?? 0 currentValue += 1 defaults?.set(currentValue, forKey: "WordHighlightedCount") } let response = NSExtensionItem() response.userInfo = [ SFExtensionMessageKey: [ "Response to": message ] ] os_log(.default, "setting up XPC connection") let xpcConnection = NSXPCConnection(serviceName: "com.***.AppName.AppName-XPC-Service") xpcConnection.remoteObjectInterface = NSXPCInterface(with: AppName_XPC_ServiceProtocol.self) xpcConnection.resume() let service = xpcConnection.remoteObjectProxyWithErrorHandler { error in os_log(.default, "Received error: %{public}@", error as CVarArg) } as? AppName_XPC_ServiceProtocol service?.performCalculation(firstNumber: 23, secondNumber: 19) { result in NSLog("Result of calculation XPC is: \(result)") os_log(.default, "Result of calculation XPC is: \(result)") context.completeRequest(returningItems: [response], completionHandler: nil) } } } The error I'm getting: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.***.AppName.AppName-XPC-Service was invalidated: failed at lookup with error 3 - No such process." What am I missing?
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217
Mar ’25
WebView permission
Hi, I'm using a webview in Swift, where I load an html file locally. Basically I have an angular project built and loaded directly into my app bundle. The webview requires the use of the camera. I request permissions via and javascript, the pop-up appears, I accept the permissions and the app works correctly. Only that after a certain number of seconds, the permissions are requested again. It's as if the webview doesn't cache the accepted permissions. Is this normal behavior?
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100
May ’25
Apple Script to Automate Web Page Plot Data
Can someone please help me: I do not have the brain space (85yo) to figure out an Apple Script or Java Script app to do this simple task. I have spent a few hours each day, over several days, and have made zero progress on such an apparently simple task. I wish to create an Automator App for the macOS Safari browser that will schedule (via a Calendar Event) the download of the 48hr data behind the hourly Fuel Mix Plot Data from the AEMO Web Site, every Monday, Wednesday, Friday and Sunday. Here is the link to the AEMO web site: AEMO, Energy Systems, Electricity, National Electricity Market (NEM), Data (NEM),Data Dashboard https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/data-nem/data-dashboard-nem The 48 hour hourly Fuel Mix data is found by selecting the "Fuel Mix" button (which by default will display the NEM Current Trend). The 48 hour trend is displayed by tapping on the small "Current" pulldown menu, and selecting "48 hrs". The 48hr Data is down loaded by selecting the small circular button just to the right of the pulldown menu. a) AEMO Web Site: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/data-nem/data-dashboard-nem b) Main Menu, and underlying html, c) Fuel Mix menu, Pulldown list, DownLoad button, and underlying html, I am familiar with C++ and have built Xcode Apps, and used Excel Macros extensively in the past. Thank you. Robert.
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98
Jun ’25
WebAuthenticationSession under a carrier-provided satellite network?
(related post: How to optimize my app for for a carrier-provided satellite network? ) I am trying to implement an app so that it works under a carrier-provided satellite network. The app uses (AS)WebAuthenticationSession for signing in. If the app is entitled to access a satellite network, will (AS)WebAuthenticationSession work as well? How about WKWebView and SFSafariViewController? Is there a way to test(simulate) a ultra-constrained network on a device or a simulator to see the expected behavior? Thanks,
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299
Jul ’25
WebPage doesn't seem to update view when changed in SwiftUi
I tried the new WebView api in swiftui and tried to pass webPage for this view to be able to control the navigation of the user by giving him the option to go back or forward using nav buttons but the view doesn't get's updated when the webPage.backForwardList.backList so the buttons remains disabled. code snippet: @available(iOS 26, *) struct LinkWebViewFor26: View { let url: URL @State var webPage = WebPage() @Environment(\.dismiss) private var dismiss var body: some View { WebView(webPage) .webViewBackForwardNavigationGestures(.disabled) .task { webPage.load(url) } .toolbar { ToolbarItem(placement: .topBarTrailing) { Button { dismiss() } label: { Image(systemName: "checkmark") } .buttonStyle(.glassProminent) } ToolbarItemGroup(placement: .topBarLeading) { BackForwardMenu( list: webPage.backForwardList.backList, label: .init(text: "Backward", systemImage: "chevron.backward") ) { item in webPage.load(item) } BackForwardMenu( list: webPage.backForwardList.forwardList.reversed(), label: .init(text: "Forward", systemImage: "chevron.forward") ) { item in webPage.load(item) } } } .onChange(of: webPage.backForwardList) { _, _ in print(webPage.backForwardList.backList) } } }
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Safari Web Extensions: storage.local.get unexpectedly returns undefined
I have noticed that storage.local.get API works differently in Safari 18 compare to other browsers and Safari 17. browser.storage.local.set({abc: 123}) browser.storage.local.get(console.log) // {abc: 123} browser.storage.local.get({abc: null}, console.log) // expect {abc: 123} but got undefined instead. According to MDN, storage.local.get should work with an object with object names as keys and the default value as value. According to Safari 18 Release notes, this may be related to a fix: 'Fixed getting an empty key from storage. (99440265) (FB11427769)'.
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800
Oct ’24
WKWebView: Fullscreen API very unreliable on iPadOS 18.x
Since iPadOS 18.x WKWebView seems to have a bug within its Fullscreen API (which can be enabled via WKPreferences.isElementFullscreenEnabled). This bug has the effect that websites trying to make an element (for example a video player) fullscreen fail to do so. This does not always happen, most of the time the fullscreen mode does work fine, but sometimes (far too often to be ignored) it does not. If an instance of WKWebView shows this issue, it can not be "fixed" by reloading the page or loading other pages, this issue exists in this instance forever. My App is a web browser App so I can create and remove WKWebView instance easily (by opening or closing Tabs). And there are times where I never see this bug, and times where ever other tab shows this bug. It's totally unreliable. The App does not show any issues at all when running under iPadOS 17 or older. The issue is only present under iPadOS 18.x. After some testing I've found out that when the bug has affected an instance of WKWebView, the JavaScript call element.requestFullscreen() will work if the element is a video element, but does no longer work if it is another element (like a DIV). If an instance of WKWebView is not affected by this bug, element.requestFullscreen() will work for all HTML elements. Does anyone has experienced this bug as well? And maybe found a workaround? Or maybe found a pattern which helps to find out what exactly is triggering this bug?
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1.1k
Jan ’25
Links in web apps in Safari 18.0 always open in the web app itself
This is problematic when opening links to other websites that require separate authentication. A typical example would be a Gmail web app, and then trying to open a link to a GitHub PR. In the 18.0 release notes, this is mentioned as Added support for opening links directly in web apps on macOS. (113034778 It'd be great if this could be customizable so that one could choose the old behavior.
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406
Oct ’24
Mobile safari uri scheme not working intermittently
I am working Web to App flow for my product. Tolink to my app from web service, I define uri scheme from app and use it from my web site. But, when I try to use this scheme from mobile safari web, It sometimes failed with message that uri is invalid. That is weird It failed SOMETIMES not always Even I tried with same url. In my device, there is current version app. Why this happen? How can I resolve this issue?
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396
Oct ’24
iOS Simulator Safari JS PushManager.subscribe(...) empty keys
When I run the following code in XCode iOS Simulator on Safari (connecting via Safari DevTools): navigator.serviceWorker.ready.then((reg) => reg.pushManager.subscribe({ userVisibleOnly: true, applicationServiceKey: "..." }).then((sub) => console.log(sub.toJSON()))) I get the response: { keys: { p256dh: "", auth: "" } } But I'm expecting p256dh and auth (and endpoint) to be filled out. Why is it not?
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549
Nov ’24
Is the Apple aware that Safari does not follow the Gamepad API spec?
The specification states that the timestamp property is a DOMHighResTimeStamp which always represents a value in milliseconds. However, in my testing (on iOS as I don't have a mac) the timestamp is given as seconds. This could break compatibility if an app/library is not tested in Safari. Worse is that the deviation seems to be undocumented as every compatibility chart states full compatibility and defines the property as milliseconds. Any workaround would also be up to one frame incorrect. So a stutter can affect input accuracy. I know this might seem small but it could mean that an app or game is unplayable in Safari if it relies on this for input.
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567
Nov ’24
Safari Web Extensions: browser.webNavigation.getAllFrames by tabId return empty string url, when url is in blob protocol
Hello. Environment Safari version 18.1 (22B81). Problem In my Safari Web Extension i need to determine the url of the active tab. I do it this way: const onError = (error) => { console.error(error); }; const getFrameUrl = async (frames) => { console.info(frames) }; const getAllFrames = (frames) => { browser.webNavigation.getAllFrames({ tabId: frames[0].id }).then(getFrameUrl, onError); }; browser.tabs.onUpdated.addListener(() => { browser.tabs.query({ currentWindow: true, active: true }).then(getAllFrames, onError); }); The problem is that if the tab url is a link in the blob protocol, then the result function browser.webNavigation.getAllFrames({ tabId: tabs[0].id }) is as follows: {frameId: 0, parentFrameId: -1, url: "", errorOccurred: false} In Safari version 17 the correct URL value was returned: {frameId: 0, parentFrameId: -1, url: "blob://<some id>", errorOccurred: false} How can I fix the problem? Environment Safari version 18.1 (22B81).
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748
Nov ’24
Nested USDZs new behaviour with Quick Look
Hello there I have a nested USDZ file I had created a long time ago with some make-up products. Its behaviour was always the same in the past: nested usdz files allow you to control each object "nested" separately. So I used this as a way to allow people to play around with a "set of objects". Today I went to try it and since I'm on ios 18 it shows an "assets tab" on the bottom that allows me to see all the assets inside the tab but doesn't allow me to see or anchor them at all! What changes do I need to do in order for this to work and where can I check documentation on these new behaviours for USDZ files? And what will this allow for in the future? Thank you in advance
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489
Dec ’24
WKWebView 120hz Support
I'm developing an application that needs smooth framerates within a wkwebview that interacts with native code. However, requestAnimationFrame by default is still throttled to 60hz even if all my target devices (the iPad Pro for example) have supported 120hz for a long time already. I noticed that the latest Safari in 18.3 beta supports unlocked framerates, but that's only under Safari feature flags. To my knowledge, these flags do not apply to WKWebView. Is there a way to enable unlocked framerate in WKWebView via requestAnimationFrame? (Calling JS at a faster rate from the native code side will not work, almost definitely, since WKWebView will still render at its own rate.) This is an experimental application for internal use and I'm okay if there are temporary beta solutions available.
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655
Jan ’25
fetch() in safari extension does not include credentials (cookie) when using from non-default profile
It seems fetch() does not include credentials (cookie) even when credentials: include is used and Safari extension has host_permissions for that domain when using from a non-default Safari profile. It includes credentials (cookie) when using from the default profile (which has the default name Personal). Is there anyone who has this problem? I try to request in popup.js like this: const response = await fetch( url, { method: 'GET', mode: 'cors', credentials: 'include', referrerPolicy: 'no-referrer', } ); and it does not include the credentials (cookie) from host_permissions. I already posted https://developer.apple.com/forums/thread/764279, and opened feedback assistant (FB15307169). But it is still not fixed yet. (macOS 15.4 beta 3) I hope this is fixed soon.
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294
Mar ’25
Failing Network Requests in Safari due to DNS cache.
We are seeing network errors in Outlook mail on iOS and MacOS safari browsers. As per current investigation, we notice these network error when the user tries to use outlook after leaving it open on Safari for a while. Observations: Issue present in both MacOS and iOS safari. Issue is not present in other webkit browsers like brave and edge on iOS. Issue is reproable on both mini and big owa on safari browser. Issue is not related to post requests being sent in different packets on safari browser. Requests are only blocked for outlook.office/outlook.live domains What does not fix this issue? Reloading the application Clearing cookie, local storage or session storage Unregistering service workers Redirecting to a different page and coming back to outlook domain Re authenticating the users What fixes this issue? Reconnecting to wifi or mobile network Reconnecting vpn Removing safari from background and reopening Flushing the dns in setting
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110
Mar ’25
Disable Smart Punctuation from Webpage
I would like to know if there is a way to disable Smart Punctuation from the webpage rather than requiring the user to do so from the settings. Adding a "inputmode=verbatim" attribute to the input HTML tags for my webpage did that for all the web browsers I tested on Windows, Ubuntu, Android, and MacOS. I tested Chrome and Firefox on all platforms, as well as Edge on Windows and Safari on Mac and iOS. So far the only time it did not disable Smart Punctuation was on Safari on iOS, but it did on MacOS.
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75
Mar ’25