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Safari bug
(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.
Topic: Safari & Web SubTopic: General
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Jun ’25
Preventing JavaScript from Stopping in Safari When It Goes into the Background
From a mail app or similar, when opening a webpage in Safari as an external browser, JavaScript on the webpage stops running if Safari goes into the background. Is there a way to prevent this from happening? Sample code for the counter: Behavior: Upon returning from the background, the counter continues for about 7-8 seconds but does not progress further. For example, if Safari is kept in the background for about 20 seconds and then brought back, the counter stops at around 7-8 seconds and only resumes counting after returning to the foreground. Expectation: The counter should continue running even if Safari goes into the background.
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216
Mar ’25
When using ProxyConfiguration, use different proxy for HTTP and HTTPS with WKWebView
I am currently developing an app using WKWebView. In iOS 17, Apple introduced ProxyConfiguration, and I have two questions regarding its usage: Is there a way to use ProxyConfiguration to distinguish between HTTP and HTTPS traffic? I have reviewed the documentation but couldn’t find a clear method for this. As an alternative approach, I am attempting to determine the request scheme within WKWebView and switch proxyConfigurations just before loading the request. My current implementation sends requests to hoge_a by default and switches to hoge_b only for HTTP traffic.   if #available(iOS 17.0, *) { if URLString.contains("http:") { webView.configuration.websiteDataStore.proxyConfigurations = [hoge_b] } } webView.load(request) if #available(iOS 17.0, *) { if URLString.contains("http:") { webView.configuration.websiteDataStore.proxyConfigurations = [hoge_a] } }   2. Since I modify proxyConfigurations every time webView.load(request) is called, are there any potential issues or concerns with this approach? I would appreciate any insights you may have on either of these questions.
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368
Feb ’25
Notification sound (Web or PWA)
Good morning fellow developers, For a while i am struggeling with providing sound to my users on IOS (Safari on Mac is no problem and every other device is not a problem) (we have an existing phone system and made a chat as well), the case is very simple: the notification sound is only for users who are logged in and online for chat. i have tried multiple things: Audio play with javascript (start with mute, play when user clicks a button so the sound is familiar, play when user clicks a button and directly pause it and continue when needed) PWA: the dashboard has been made available as pwa and notifications using google firebase. The popup does show for notifcations to be allowed (and receiving the notifications does work on any other device) But any IOS device cannot register. The information i find is that notifications were supported with 16.4 or higher but also have been deprecated around IOS 17, auto play is not allowed. We have an app in development for our product as well were we will have a notification which will handle this, but that is not the solution we can use now. Long story, short question: is it still somehow possible to push a notification to the user when using the PWA or play a sound in the browser (based on an ajax function). The app/website wont be in the background, so it will always be on the screen. Languages we use: html/javascript (mostly vanilla)/php
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111
Mar ’25
Parse error in WebAssembly code only in Safari
I have compiled some Java code to WebAssembly via TeaVM and wrapped it in a PWA. The resulting code runs nicely in Firefox and Chrome but throws an exception in Safari. CompileError: WebAssembly.Module doesn't parse at byte 1657: invalid extended GC op 24, in function at index 2251 Can anybody tell me what's wrong with that code? I mean it can't be so bad if Firefox and Chrome can parse and run it without problems. I am using the most recent versions of all browsers and the offending code can be found here: Run the demo via: https://mpmediasoft.de/demos/Emmentaler/Emmentaler-Demo-TeaVM-Wasm/index.html The offending wasm file is: https://mpmediasoft.de/demos/Emmentaler/Emmentaler-Demo-TeaVM-Wasm/tvw/ModelBridgeTeaVM.wasm With Safari the demo just shows some empty space instead of a complex polygon. You can see the error in the javascript console of Safari.
Topic: Safari & Web SubTopic: General
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417
Jul ’25
macOS customized shortcut for Safari with menu title "ReTab" doesn't trigger the extension
Hello! I've made a Safari extension that supports command "ReTab", and a couple of month ago, adding a customized macOS shortcut for Safari with menu title "ReTab" did trigger the extension. However, it's not working anymore and I'm not sure if it's from macOS/Safari update or because I changed manifest from v2 to v3 - could you help check if there's anything wrong with either the manifest.json or background.js? (the default Cmd+E still works) Thank you in advance! Xun manifest.json: { "manifest_version": 3, "default_locale": "en", "name": "ReTab", "description": "Go to the last active tab with Cmd+E!", "version": "1.4", "homepage_url": "https://LycheeIsle.com", "background": { "service_worker": "background.js" }, "action": { "default_icon": "images/toolbar-icon.svg" }, "permissions": [ "commands", "tabs", "storage" ], "commands": { "ReTab": { "suggested_key": { "default": "Command+E" }, "description": "Go to the last active tab" } }, "options_page": "options.html" } in background.js, I have this line which should listen to the command, and Cmd+E works but any customized shortcut for "ReTab" in Safari doesn't: browser.commands.onCommand.addListener(async (command) => { if (command === "ReTab" || command === "retab") { await retab() } });
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398
Feb ’25
Embedded Power BI reports crashes in mobile layout using iOS
We're embedding the Power BI reports into our portal by using JS library. While testing them, we found that mobile layout of the reports don't work as we expect on iOS devices (tested in Chrome and Safari). There are two principals issues: 1) the site is automatically refreshed when the users filter the data (we reduced them to lower expression) and 2) the site also crashes after a while using the dashboard by applying different filters.
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70
Mar ’25
WebKit https post return html use javascript send WebSocket Request
In my application, I use HTML pages to display the interface. Since it’s a cross-platform app, the pages and interactions work properly on other platforms. However, in WebKit, because HTTPS protocol is used, JS requests from the page cannot use the ws protocol but must use the wss protocol under HTTPS. Is there any way to allow a webpage under HTTPS to use ws requests normally? Google Chrome can do this.
Topic: Safari & Web SubTopic: General
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97
Jun ’25
iOS 18 navigator.language(s) not working in pwa
Within installed PWAs, the navigator.language / navigator.languages property return a value, that is not according to the Safari settings and defers from the navigator.language / navigator.languages in the browser itself. Example: Safari settings set to "German", returns "de-DE" in browser mode, but within the installed webApp it returns "en-GB". I thought this might be due to the overall phone language settings, but this is not the case. Even is the phone is completely set to German, the navigator returns "en-GB" within an installed PWA. My phone is also not English/British, there is no reason why "en-GB" should show up.
Topic: Safari & Web SubTopic: General
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373
Feb ’25
Issue: Webview does not respond when the biometric component is presented
Hi, We have a native application with a webview part. When we open the app, we load webview resources in a false foreground. The webview communicates with the native part to query local variables, among other things. We have noticed that for the past few weeks, when the biometric component is presented to enter the fingerprint or faceId, while the component is displayed, the webview does not respond. We do not see the calls made by the webview, nor can we respond to them. Even if you open the Safari debugger, the webview does not respond UNTIL you close the biometric component in the native part. This has created a big problem in our app, and we wanted to know if it is an issue you had on your radar. Thank you very much.
Topic: Safari & Web SubTopic: General Tags:
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244
Feb ’25
Safari Web Extension - ES6 Module Imports Not Working After Enabling "type": "module"
I'm trying to use ES6 module imports in a Safari Web Extension, but despite enabling "type": "module" in the manifest, imports are not functioning as expected. Specifically when working with a project structure that includes multiple directories. A root directory containing the manifest.json and main entry point scripts A scripts/ folder housing core functionality modules A common/ directory for shared utilities, constants, and helper functions A background.js file in the root that attempts to import from these various directories When trying to import modules from the scripts/ and common/ directories into my background.js, I'm encountering complete import failures. How can I correctly implement cross-directory module imports in Safari Web Extensions?
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149
Mar ’25
Detecting tabs change in Safari App Extension when switching windows inside validateToolbarItem.
Hi. I'm a developer of Tab Finder (https://apps.apple.com/us/app/tab-finder/id6741719894) My problem is that every time i switch from my first window to a second window, the tabs in the validateToolbarItem() are INcorrect on a first call, but when I switch back from the second window to my main window, the tabs are CORRECT even on a first call. To demonstrate it, i recorded a video: https://youtu.be/RwskzrSJ8u0 To run the same sample extension from the video, you can get the code from this GitHub repo: https://github.com/kopyl/test-tabs-change Its only purpose is to log URLs of an active page of all tabs. The SafariExtensionHandler's code of the sample app is very simple: import SafariServices func printOpenTabsHost(in window: SFSafariWindow) async { let tabs = await window.allTabs() log("Logging tabs for a new window: \(window.hashValue)") for tab in tabs { let page = await tab.activePage() let properties = await page?.properties() let url = properties?.url log(url?.absoluteString ?? "No URL") } } class SafariExtensionViewController: SFSafariExtensionViewController { static let shared = SafariExtensionViewController() } class SafariExtensionHandler: SFSafariExtensionHandler { override func validateToolbarItem(in window: SFSafariWindow, validationHandler: @escaping ((Bool, String) -> Void)) { Task { await printOpenTabsHost(in: window) } validationHandler(true, "") } override func popoverViewController() -> SFSafariExtensionViewController { return SafariExtensionViewController.shared } } Could you please tell if i'm missing something and how to see the actual tabs inside the overridden validateToolbarItem call of the SafariExtensionHandler (or in any other way, I'm okay with any implementation as long as it works).
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403
Mar ’25
Prevent collapsing every tab group when collapsing sidebar
I'm not sure if this is even the right place to ask this, or voice this complaint if there's no fix. If not, please direct me where to go. I'm trying to switch all my development over to Safari, but the tab sidebar is driving me absolutely insane. Let's say I have a bunch of tab groups expanded, and I collapse the sidebar to focus on the webapp I am building. When I toggle to show the sidebar again, every single tab group is collapsed. Why is it 2 clicks to see the tabs in the sidebar? Even with zero tab groups, and just tabs in the workspace, if you collapse the sidebar it'll collapse the list of tabs. Is there some hidden setting for this? Who do we have to complain to?
Topic: Safari & Web SubTopic: General
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204
Feb ’25
Apple Pay Merchant validation Url - ambiguous API documentation
Hello, I was going through the Apple Pay API documentation and noticed ambiguity on the exact process to complete merchant validation. One of the documentation mentions that the validation url will be Your server posts a request using mutual TLS (mTLS) by calling the Apple Pay server’s Payment Session endpoint. Endpoint (Global) POST https://apple-pay-gateway.apple.com/paymentservices/paymentSession Endpoint (China region) POST https://cn-apple-pay-gateway.apple.com/paymentservices/paymentSession Referencing the url: https://developer.apple.com/documentation/apple_pay_on_the_web/apple_pay_js_api/requesting_an_apple_pay_payment_session whereas the other references that the value should be used as provided by the onvalidatemerchant event object with the property validationURL. Refer: https://developer.apple.com/documentation/apple_pay_on_the_web/apple_pay_js_api/providing_merchant_validation Can someone confirm which is the correct approach to follow ?
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416
Feb ’25
httpd.conf syntax to include Homebrew extensions for php and mySQL
I have "http://localhost:8080" showing the index page I've created but php is not handled though an extension is running. Haven't even tried mySQL yet but since there is no reference to it in https.conf the same problem will exist. Homebrew extension running also. https.conf: #PHP was deprecated in macOS 11 and removed from macOS 12 #LoadModule php7_module libexec/apache2/libphp7.so There are no php.so files on my machine and again no mention of mysql What should I enter in http.conf to activate these functionalities? Thanks. PS could you reference a tutorial on using Safari and Web inspector
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138
Jun ’25
WKWebView audio/video codecs support
Actually this is a duplicate for https://developer.apple.com/forums/thread/106537 but in web-specific forums section. Is there any video/audio codec best practices, guides, recommendations for app/web developers for best performance (take advantage from HW acceleration), power consumption saving? What are officially supported media containers? What are video encoding profiles, video dimensions, frame rates? The only official source I have found is https://developer.apple.com/documentation/webkit/delivering-video-content-for-safari?language=objc. But h264 is pretty old. I experimentally found that the VP9 video format is also supported on iOS newer versions. But is this a requirement? Сan i be sure that the video will play on all devices? My goal is to provide web media content (which will be rendered in my application using WKWebView API) that will be supported by most devices (both iOS and MacOS), takes advantage of such features as hardware decode acceleration and be efficient. Any hints/info is highly appreciated. Best regards.
Topic: Safari & Web SubTopic: General Tags:
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116
May ’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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118
May ’25