"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

Hello, I have a few questions regarding the documentation here: Can this method described in the article be built with Xcode 26 and run on iOS 26? Or is it restricted to run only on iOS 26, since AppExtensionPoint appears to be available starting from iOS 26? Does this approach allow two apps under the same Team ID to communicate with each other? Does this approach also allow two apps under different Team IDs to communicate with each other? Is it mandatory to implement EXAppExtensionBrowserViewController and obtain user consent before using this method to exchange information? In our implementation, we followed the documentation. Inside EXAppExtensionBrowserViewController, we were able to see the Generic Extension from another app and enabled the permission. However, we still get the following error: Failed to connect: Error Domain=NABUExtensionConnector Code=1 "No matching extension found" UserInfo={NSLocalizedDescription=No matching extension found} Could someone clarify whether this is expected behavior, or if we are missing an additional configuration step? Thanks in advance!

My Xcode project has the following configuration: 1 iOS app target 1 Xcode framework target (mach-o-type "Dynamic Library") 5 static libraries Dependencies: All the static libraries are target dependencies of the framework. The framework is the only target dependency of the iOS app. For the iOS app target, within the General tab > Frameworks, Libraries & Embedded content, I've set the framework as "Do not embed" So now I have a dynamic framework which won't be copied to the .app bundle in the build output. As per my understanding, this should result in a runtime error, dyld should not be able to find the framework files as they were not embedded in the final .app bundle. But regardless, my app runs without any errors, using all the methods exposed by the framework. What is the correct understanding here? What exactly does Embed/Do not embed mean (apart from excluding the files from .app bundle) When both settings are specified, is there any priority or precedence of one setting over the other?

Question: In the sandbox environment, I attempted to perform an In-App Purchase within an IME (Input Method Extension) using a sandbox test account. The purchase flow completed successfully, and I received the success callback. However, I encountered an issue: no receipt file is generated. I tried checking with both the main app’s bundle and the IME’s bundle, but the receipt file was not found in either case. When I attempted to refresh the receipt using SKReceiptRefreshRequest, it failed with an exception (error code: 0). I would appreciate any guidance on how to resolve this issue.

Hi Apple team, We’re shipping a Live Caller ID Lookup extension on iOS 18 and have a question about the automatic refresh of configuration/PIR parameters. Questions 1. Is there any documented interval/TTL (min/max) for the system’s automatic refresh of /config and PIR parameters, or is it entirely opportunistic (battery/network/usage)? I can’t find a cadence in the IdentityLookup docs. 2. Does iOS honor server cache headers (e.g., Cache-Control/Expires) to influence when it re-fetches? 3. Which events also trigger a refresh (enable/disable in Settings, OS/app update, device reboot, token/epoch change)? 4. Are there rate limits or best-practice limits for calling refreshExtensionContext and refreshPIRParameters?

I’m testing .glassEffect() in a widget on the latest iOS 26 beta, but it seems to have no effect at all — the blur isn’t visible, and in some cases even white text disappears completely. Is this the expected behavior for widgets (i.e. glass effect is not supported), or could this be a bug in the beta? Would appreciate any clarification or pointers. Thanks!

I'm using the LockedCameraCaptureExtension to launch my Camera app from the camera button. Some of our users report our app crashing a few seconds after being launch from the camera button. The call stack is something inside BoardServices [BSServicesConfiguration activateXPCService] I'm not sure how to investigate or fix this, anyone else having the same issue? Basically in my LockedCameraCaptureExtension when it loads I just call openApplication on the LockedCameraCaptureSession to launch into my app. @main struct captureExtension: LockedCameraCaptureExtension { var body: some LockedCameraCaptureExtensionScene { LockedCameraCaptureUIScene { session in Button(action: { Task { await openCamera(session: session) } }, label: { Text("Open Camera") }) .buttonStyle(PlainButtonStyle()) .task { await openCamera(session: session) } } } private func openCamera(session: LockedCameraCaptureSession) async { try? await session.openApplication(for: NSUserActivity(activityType: "com.mycompany.camera")) } }

I'm seeking help troubleshooting a persistent com.apple.IdentityLookup.error.messagefilter Code=3 error when my Message Filter Extension tries to defer to network. I’ve exhausted Apple documentation and forum posts, and Apple Support has asked me to escalate this via the forums to reach engineering. ✅ My Setup: Xcode: 16.2 macOS: Sequoia 15.3.1 (Apple Silicon Mac mini) Device: iPhone 14 Pro iOS: 18.3.2 (Developer Mode enabled) Tested via: TestFlight install on real device 📦 App Structure: Main App Target (minimal "hello world" logic) Message Filter Extension Target Messages Extension Target Message Reporting Extension Target Notifications Extension Target ✅ Capabilities & Configurations Main App Capabilities: App Groups: group.com.example.shared Network Extensions: Content Filter Associated Domains: messagefilter:my-api.example.com applinks:my-api.example.com Message Filter Capabilities: App Groups: same as main app Network Extensions: Content Filter Associated Domains: same as above 📄 Info.plist Config Main App Info.plist: NSAppTransportSecurity with: NSAllowsArbitraryLoads = YES Exception domain my-api.example.com with: NSIncludesSubdomains = YES NSTemporaryExceptionAllowsInsecureHTTPLoads = YES NSTemporaryExceptionMinimumTLSVersion = TLSv1.2 MessageFilter Info.plist: Same ATS settings as above NSExtension block: <key>NSExtension</key> <dict> <key>NSExtensionAttributes</key> <dict> <key>ILMessageFilterExtensionNetworkURL</key> <string>https://my-api.example.com/api/sms-filter</string> <key>ILClassificationExtensionSMSReportDestination</key> <string>+10000000000</string> </dict> <key>NSExtensionPointIdentifier</key> <string>com.apple.identitylookup.message-filter</string> <key>NSExtensionPrincipalClass</key> <string>$(PRODUCT_MODULE_NAME).MessageFilterExtension</string> </dict> 📜 Entitlements Main App Entitlements <key>com.apple.developer.associated-domains</key> <array> <string>messagefilter:my-api.example.com</string> <string>applinks:my-api.example.com</string> </array> <key>com.apple.developer.networking.networkextension</key> <array> <string>content-filter-provider</string> </array> <key>com.apple.security.application-groups</key> <array> <string>group.com.example.shared</string> </array> Message Filter Extension Entitlements Identical to main app’s, scoped to the extension. 📄 AASA File (Hosted on https://my-api.example.com/.well-known/apple-app-site-association) Serves as application/json, returns 200 OK, and is reachable on device via Safari. Logs confirm AASA is downloaded and installed successfully during TestFlight install. { "applinks": { "apps": [], "details": [ { "appID": "TEAMID.com.example.app", "paths": ["*"] }, { "appID": "TEAMID.com.example.app.MessageFilter", "paths": ["*"] } ] }, "messagefilter": { "apps": [], "details": [ { "appID": "TEAMID.com.example.app", "filterType": "URL", "domains": ["my-api.example.com"] }, { "appID": "TEAMID.com.example.app.MessageFilter", "filterType": "URL", "domains": ["my-api.example.com"] } ] }, "classificationreport": { "apps": [], "details": [ { "appID": "TEAMID.com.example.app", "domains": ["my-api.example.com"] }, { "appID": "TEAMID.com.example.MessageReporting", "domains": ["my-api.example.com"] } ] } } ❌ The Problem When the extension launches and receives an SMS to classify, logs show: deferQueryRequestToNetwork failed: The operation couldn’t be completed. (com.apple.IdentityLookup.error.messagefilter error 3.) The extension loads, network URL is available, the AASA is installed, and yet the extension is not allowed to defer to network. This occurs every time. 🧪 Other Notes Tried rebuilding everything from scratch Archiving to TestFlight, not running via Xcode Clean entitlements verified using codesign -d --entitlements :- Console logs show no issues with AASA download or validation Any help or insights from Apple engineering or others in the community who have successfully deployed a working Message Filter Extension would be hugely appreciated. Thanks in advance 🙏

I'm experiencing a conflict between Xcode 16's build requirements and App Store validation for DeviceActivityReport extensions. The Issue: Created a DeviceActivityReport extension using Xcode 16's template Extension builds and runs perfectly locally TestFlight upload fails with Apple saying EXAppExtensionAttributes is incorrect for widget extensions When I remove EXAppExtensionAttributes from Info.plist, local builds fail with: "Appex bundle does not define an EXAppExtensionAttributes dictionary" Current Info.plist (works locally, rejected by App Store): EXAppExtensionAttributes EXExtensionPointIdentifier com.apple.deviceactivityui.report-extension NSExtension NSExtensionPointIdentifier com.apple.deviceactivityui.report-extension NSExtensionPrincipalClass $(PRODUCT_MODULE_NAME).ActivityReportExtension The Problem: Xcode 16's "Device Activity Report Extension" template uses fileSystemSynchronizedGroups which appears to require the EX configuration format. But App Store validation rejects this format. Has anyone successfully uploaded a DeviceActivityReport extension created in Xcode 16? Any workarounds for this conflict between local build requirements and App Store validation? Using: Xcode 16.4, Family Controls entitlement (approved), iOS 18.5 SDK Thanks for any insights!

I've made working Spotlight Import Extension with in macOS 15.5 (24F74). mdimport confirm it's installed, and working. The problem is related to accessing data inside document bundles (package directory) class ImportExtension: CSImportExtension { override func update(_ attributes: CSSearchableItemAttributeSet, forFileAt url: URL) throws { // ERROR: The file "QuickSort.notepad" couldn't be opened because you don't have permission to view it. let fileWrapper = try FileWrapper(url: url) } } forFileAt url points to a bundle. In order to read the metadata the extension needs to load the bundle from url and access its content, however in the sandbox environment,t the url allows only access to the bundle directory itself in particular NSFileWrapper(url: url) fails with error "The file "name.extension" couldn't be opened because you don't have permission to view it.", and effectively prevent from providing useful metadata. Is there a way to access the Document Bundle content in order to read the metadata for Spotlight?

I get an error when using Share Extension to share images in iOS 26. It works fine in iOS 18. The error message is: Error acquiring assertion: <Error Domain=RBSAssertionErrorDomain Code=2 "Could not find attribute name in domain plist" UserInfo={NSLocalizedFailureReason=Could not find attribute name in domain plist}>. What should I do? My plist file looks like this: NSExtension NSExtensionAttributes NSExtensionActivationRule NSExtensionActivationSupportsImageWithMaxCount 1 NSExtensionMainStoryboard MainInterface NSExtensionPointIdentifier com.apple.share-services

I get an error when using Share Extension to share images in iOS 26. It works fine in iOS 18. The error message is: Error acquiring assertion: <Error Domain=RBSAssertionErrorDomain Code=2 "Could not find attribute name in domain plist" UserInfo={NSLocalizedFailureReason=Could not find attribute name in domain plist}>. What should I do? My plist file looks like this: NSExtension NSExtensionAttributes NSExtensionActivationRule NSExtensionActivationSupportsImageWithMaxCount 1 NSExtensionMainStoryboard MainInterface NSExtensionPointIdentifier com.apple.share-services

We are in the process of updating our legacy Spotlight MDImporter to the new macOS Spotlight App Extension. The transition works well for standard attributes such as title, textContent, and keywords. However, we encounter an issue when adding custom attributes to the CSSearchableItemAttributeSet. These custom attributes are not being persisted, which means they cannot be queried using a Spotlight NSMetadataQuery. Has anyone an idea on how to append custom attributes so that they are included in the indexed file status, as displayed by the shell command mdimport -t -d3 <path> A sample project illustrating the problem is available here: https://www.dropbox.com/scl/fi/t8qg51cr1rpwouxdl900b/2024-09-04-Spotlight-extAttr.zip?rlkey=lg6n9060snw7mrz6jsxfdlnfa&dl=1

This concerns file provider framework on macOS. Some users of our application (Egnyte.app) report that they have problems downloading dataless files. When a file reaches invalid state, trying to open or download it through Finder results in "Invalid argument" alert (see example-recording.mp4). At the same time our FileProvider extension receives no fetchContents or fetchPartialContents calls. A step-by-step set of instructions to reproduce the problem (if possible) So far we don't have clear reproduction steps. The issue is easily reproducible, for multiple files, for some of our customers. See attached sysdiagnose and recording. What results you expected Our extension receives a request to download the file. File downloads and opens successfully. What results you actually saw No download request made to our File Provider extension. File doesn't open, Finder alert instead. PLEASE NOTE: Before recording and collecting sysdiagnose we installed FileProvider.mobileconfig, slightly modified official profile that we attach. Example reproduction happens 8:33 into full-recording.mp4, around 17:01:18 / 17:01:19 machine’s time. Shared sysdiagnose and recordings come from one of our customers, they permitted us to share the data. In the recording they try to open files with multiple 3rd party applications (Vectorworx, Office PowerPoint) and those opens fail with alerts from those applications. We have similar reports from customers using Adobe apps. More info in FB19462434

This concerns file provider framework on macOS. Some users of our application (Egnyte.app) report that they have problems downloading dataless files. When a file reaches invalid state, trying to open or download it through Finder results in "Invalid argument" alert (see example-recording.mp4). At the same time our FileProvider extension receives no fetchContents or fetchPartialContents calls. A step-by-step set of instructions to reproduce the problem (if possible) So far we don't have clear reproduction steps. The issue is easily reproducible, for multiple files, for some of our customers. See attached sysdiagnose and recording. What results you expected Our extension receives a request to download the file. File downloads and opens successfully. What results you actually saw No download request made to our File Provider extension. File doesn't open, Finder alert instead. PLEASE NOTE: Before recording and collecting sysdiagnose we installed FileProvider.mobileconfig, slightly modified official profile that we attach. Example reproduction happens 8:33 into full-recording.mp4, around 17:01:18 / 17:01:19 machine’s time. Shared sysdiagnose and recordings come from one of our customers, they permitted us to share the data. In the recording they try to open files with multiple 3rd party applications (Vectorworx, Office PowerPoint) and those opens fail with alerts from those applications. We have similar reports from customers using Adobe apps.

Has anyone encountered a situation like mine below? I’ve submitted feedback, but it seems like I’ll have to wait for a while. ContactProviderManager Fails with Custom domainIdentifier, Works Only with "defaultDomain" Category: Developer Tools / Frameworks Subcategory: ContactProvider Framework Reproducibility: Always iOS Version: iOS 18.0 (and later) Xcode Version: Xcode 16.0 (or later)  Description: When initializing a ContactProviderManager with a custom ContactProviderDomain using any identifier other than "defaultDomain", the initializer throws a ContactProviderError.domainNotRegistered error. The documentation for ContactProviderDomain (https://developer.apple.com/documentation/contactprovider/contactproviderdomain) does not provide any method to register custom identifiers, making it impossible to use ContactProviderManager with a desired custom identifier. The only successful case is when the identifier is "defaultDomain". print("Error: (error)") // No error, initialization succeeds Steps to Reproduce: Create a Contact Provider Extension in an iOS app targeting iOS 18.0. In host app, Attempt to initialize a ContactProviderManager with a custom ContactProviderDomain identifier: ​import ContactProvider func enableExtensionExample() async {    do {        // The app creates a contact provider manager with custom domain.        let manager =  try ContactProviderManager(domainIdentifier: "com.mycompany.customdomain")               // May prompt the person to enable the custom domain.        try await manager.enable()    } catch {       print("Error: \(error)") // Prints ContactProviderError.domainNotRegistered    } } Try the same with the default identifier: ​import ContactProvider func enableExtensionExample() async {    do {        // The app creates a contact provider manager with a default domain.        let manager =  try ContactProviderManager(domainIdentifier: "defaultDomain")               // May prompt the person to enable the default domain.        try await manager.enable()    } catch {       print("Error: \(error)") // No error, initialization succeeds    } } Build and run the app on a device or simulator running iOS 18.0 or later. Observe that the initializer fails with domainNotRegistered for any identifier other than "defaultDomain". Expected Behavior: The ContactProviderManager should initialize successfully with any valid ContactProviderDomain identifier, provided the domain is properly configured or registered, allowing developers to use custom identifiers for organizing contacts (e.g., for different categories or sources). Actual Behavior: The ContactProviderManager initializer throws ContactProviderError.domainNotRegistered for any ContactProviderDomain identifier other than "defaultDomain". Only the "defaultDomain" identifier succeeds, limiting the ability to use custom domains. Impact: Developers cannot use custom identifiers to categorize or manage contacts in separate domains, restricting the ContactProvider framework’s flexibility. This forces reliance on the "defaultDomain" identifier, which may not suit use cases requiring distinct contact groups (e.g., personal vs. business contacts). Suggested Fix: Provide an API to register custom ContactProviderDomain identifiers, such as a ContactProviderManager.register(domain:) method. Update the ContactProviderDomain and ContactProviderManager documentation to clarify how to use custom identifiers or explicitly state if only "defaultDomain" is supported. If custom identifiers are not intended to be supported, document this limitation clearly to avoid developer confusion. Feedback : FB20104001 (ContactProviderManager Fails with Custom domainIdentifier, Works Only with "defaultDomain")

I'm trying to use DNR to force safe search with Qwant search engine. Under certain circumstances (scenario described below) the search is performed with an API which contains the safe search level in a URL parameter. A typical query URL is https://api.qwant.com/v3/search/web?q=test&count=10&locale=fr_FR&offset=0&device=desktop&tgp=1&safesearch=0&displayed=true&llm=true. I want a DNR rule to force safesearch to be 2 (= strict) (from some javascript code) : { id: 1, priority: 1, action: { type: 'redirect', "redirect": { "transform": { "queryTransform": { "addOrReplaceParams": [{ "key": "safesearch", "value": "2" }] } } } }, condition: { "urlFilter": "api.qwant.com/v3/search", "resourceTypes": ["xmlhttprequest"] }, } When this rule is activated, I end up with a URL with the original safesearch parameter AND the forced one : https://api.qwant.com/v3/search/web?q=test&count=10&locale=fr_FR&offset=0&device=desktop&tgp=1&safesearch=0&displayed=true&llm=true&safesearch=2. To reproduce this request (with the previous DNR rule in place) : navigate to https://www.qwant.com search for some string (test in my case). This displays the list of results ; click the engine button at the top right to display the settings pane ; inspect network request performed by this page ; change the Adult filter in the list -> the results are automatically updated with the new settings. The web request shows URL with the 2 safesearch parameters. I already used addOrReplaceParams in 'standard' contexts (main_frame) and it works just fine. Any hint on what goes on ? Thank you.

import UIKit class KeyboardViewController: UIInputViewController { // MARK: - Properties private var keyboardView: KeyboardView! private var heightConstraint: NSLayoutConstraint! private var hasInitialLayout = false // 存储系统键盘高度和动画参数 private var systemKeyboardHeight: CGFloat = 300 private var keyboardAnimationDuration: Double = 0.25 private var keyboardAnimationCurve: UIView.AnimationOptions = .curveEaseInOut // MARK: - Lifecycle override func viewDidLoad() { super.viewDidLoad() setupKeyboard() } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) // 在视图显示前更新键盘高度，避免闪动 if !hasInitialLayout { hasInitialLayout = true } } override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) } // MARK: - Setup private func setupKeyboard() { // 创建键盘视图 keyboardView = KeyboardView() keyboardView.translatesAutoresizingMaskIntoConstraints = false view.addSubview(keyboardView) // 设置约束 - 确保键盘贴紧屏幕底部 NSLayoutConstraint.activate([ keyboardView.leftAnchor.constraint(equalTo: view.leftAnchor), keyboardView.rightAnchor.constraint(equalTo: view.rightAnchor), keyboardView.bottomAnchor.constraint(equalTo: view.bottomAnchor) ]) // 设置初始高度约束（使用系统键盘高度或默认值） let initialHeight = systemKeyboardHeight heightConstraint = keyboardView.heightAnchor.constraint(equalToConstant: initialHeight) heightConstraint.isActive = true } // MARK: - Layout Events override func viewDidLayoutSubviews() { super.viewDidLayoutSubviews() } override func viewSafeAreaInsetsDidChange() { super.viewSafeAreaInsetsDidChange() } // MARK: - 键盘高度请求 // 这个方法可以确保键盘扩展报告正确的高度给系统 override func updateViewConstraints() { super.updateViewConstraints() // 确保我们的高度约束是最新的 if heightConstraint == nil { let height = systemKeyboardHeight > 0 ? systemKeyboardHeight : 216 heightConstraint = NSLayoutConstraint( item: self.view!, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 0.0, constant: height ) heightConstraint.priority = UILayoutPriority(999) view.addConstraint(heightConstraint) } else { let height = systemKeyboardHeight > 0 ? systemKeyboardHeight : 216 heightConstraint.constant = height } } } // MARK: - Keyboard View Implementation class KeyboardView: UIView { private var keysContainer: UIStackView! override init(frame: CGRect) { super.init(frame: frame) setupView() } required init?(coder: NSCoder) { super.init(coder: coder) setupView() } private func setupView() { backgroundColor = UIColor(red: 0.82, green: 0.84, blue: 0.86, alpha: 1.0) // 创建按键容器 keysContainer = UIStackView() keysContainer.axis = .vertical keysContainer.distribution = .fillEqually keysContainer.spacing = 8 keysContainer.translatesAutoresizingMaskIntoConstraints = false addSubview(keysContainer) // 添加约束 - 确保内容在安全区域内 NSLayoutConstraint.activate([ keysContainer.topAnchor.constraint(equalTo: safeAreaLayoutGuide.topAnchor, constant: 8), keysContainer.leftAnchor.constraint(equalTo: safeAreaLayoutGuide.leftAnchor, constant: 8), keysContainer.rightAnchor.constraint(equalTo: safeAreaLayoutGuide.rightAnchor, constant: -8), keysContainer.bottomAnchor.constraint(equalTo: safeAreaLayoutGuide.bottomAnchor, constant: -8) ]) // 添加键盘行 } }

I created 2 iOS projects in Xcode: Project 1: 4 targets (main app + 3 app extensions) 4 static libraries the main app's target dependencies include - 3 app extensions and the 4 libs. the main app's binary is linked to all 4 libs similarly, each extension is linked to all 4 libs Project 2: 5 targets (main app + 3 app extensions + 1 framework) 4 static libraries the main app's target dependencies include - 3 app extensions and the framework each extension is dependent only on the framework the framework's target dependencies include all the 4 static libs As per my understanding, the app bundle size for Project 2 should be less than that of Project 1, since we eliminate duplicating the static libs for each target by using a framework instead. However, I have found that the bundle size is more for Project 2 as compared to the bundle size of project 1. I do not understand, why?

We are encountering an issue where the Safari extension we are developing stops working while in use on relatively new iOS versions (confirmed on 17.5.1, 17.6.1, and 18). Upon checking the Safari console, the content script is displayed in the extension script, so the background script or Service Worker must be stopping. The time until it stops is about 1 minute on 17.5.1 and about one day on 17.6.1 or 18. When it stops, we would like to find a way to restart the Service Worker from the extension side, but we have not found a method to do so yet. To restart the extension, the user needs to turn off the corresponding extension in the iPhone settings and then turn it back on. As mentioned in the following thread, it is written that the above bug was fixed in 17.6, but we recognize that it has not been fixed. https://forums.developer.apple.com/forums/thread/758346 On 17.5.1, adding the following process to the background script prevents it from stopping for about the same time as on 17.6 and above. // Will be passed into runtime.onConnect for processes that are listening for the connection event const INTERNAL_STAYALIVE_PORT = "port.connect"; // Try wake up every 9S const INTERVAL_WAKE_UP = 9000; // Alive port var alivePort = null; // Call the function at SW(service worker) start StayAlive(); async function StayAlive() { var wakeup = setInterval(() => { if (alivePort == null) { alivePort = browser.runtime.connect({ name: INTERNAL_STAYALIVE_PORT }); alivePort.onDisconnect.addListener((p) => { alivePort = null; }); } if (alivePort) { alivePort.postMessage({ content: "ping" }); } }, INTERVAL_WAKE_UP); } Additionally, we considered methods to revive the Service Worker when it stops, which are listed below. None of the methods listed below resolved the issue. ① Implemented a process to create a connection again if the return value of sendMessage is null. The determination of whether the Service Worker has stopped is made by sending a message from the content script to the background script and checking whether the message return value is null as follows. sendMessageToBackground.js let infoFromBackground = await browser.runtime.sendMessage(sendParam); if (!infoFromBackground) { // If infoFromBackground is null, Service Worker should have stopped. browser.runtime.connect({name: 'reconnect'}); // ← reconnection process // Sending message again infoFromBackground = await browser.runtime.sendMessage(sendParam); } return infoFromBackground.message; Background script browser.runtime.onConnect.addListener((port) => { if (port.name !== 'reconnect') return; port.onMessage.addListener(async (request, sender, sendResponse) => { sendResponse({ response: "response form background", message: "reconnect.", }); }); ② Verified whether the service worker could be restarted by regenerating Background.js and content.js. sendMessageToBackground.js export async function sendMessageToBackground(sendParam) { let infoFromBackground = await browser.runtime.sendMessage(sendParam); if (!infoFromBackground) { executeContentScript(); // ← executeScript infoFromBackground = await browser.runtime.sendMessage(sendParam); } return infoFromBackground.message; } async function executeContentScript() { browser.webNavigation.onDOMContentLoaded.addListener((details) => { browser.scripting.executeScript({ target: { tabId: details.tabId }, files: ["./content.js"] }); }); } However, browser.webNavigation.onDOMContentLoaded.addListener was not executed due to the following error. @webkit-masked-url://hidden/:2:58295 @webkit-masked-url://hidden/:2:58539 @webkit-masked-url://hidden/:2:58539 ③ Verify that ServiceWorker restarts by updating ContentScripts async function updateContentScripts() { try { const scripts = await browser.scripting.getRegisteredContentScripts(); const scriptIds = scripts.map(script => script.id); await browser.scripting.updateContentScripts(scriptIds);//update content } catch (e) { await errorLogger(e.stack); } } However, scripting.getRegisteredContentScripts was not executed due to the same error as in 2. @webkit-masked-url://hidden/:2:58359 @webkit-masked-url://hidden/:2:58456 @webkit-masked-url://hidden/:2:58456 @webkit-masked-url://hidden/:2:58549 @webkit-masked-url://hidden/:2:58549 These are the methods we have considered. If anyone knows a solution, please let us know.