diff --git a/ZShare/ViewModels/ExtensionViewModel.swift b/ZShare/ViewModels/ExtensionViewModel.swift
index 40b07f7ab..1ffec8186 100644
--- a/ZShare/ViewModels/ExtensionViewModel.swift
+++ b/ZShare/ViewModels/ExtensionViewModel.swift
@@ -1457,7 +1457,13 @@ final class ExtensionViewModel {
 
                 recents = recentCollections
                 library = _library
-                collection = _collection
+                switch self.state.selectedCollectionId {
+                case .collection:
+                    collection = _collection
+                    
+                default:
+                    break
+                }
             })
 
             guard let library = library else { return }
diff --git a/Zotero/Controllers/Database/Requests/ReadCollectionAndLibraryDbRequest.swift b/Zotero/Controllers/Database/Requests/ReadCollectionAndLibraryDbRequest.swift
index 1af670342..a1d0f5209 100644
--- a/Zotero/Controllers/Database/Requests/ReadCollectionAndLibraryDbRequest.swift
+++ b/Zotero/Controllers/Database/Requests/ReadCollectionAndLibraryDbRequest.swift
@@ -26,7 +26,11 @@ struct ReadCollectionAndLibraryDbRequest: DbResponseRequest {
             let rCollection = try ReadCollectionDbRequest(libraryId: self.libraryId, key: key).process(in: database)
             let collection = Collection(object: rCollection, itemCount: 0)
             return (collection, library)
-            
+
+        case .custom(let type):
+            let collection = Collection(custom: type)
+            return (collection, library)
+
         default:
             return (nil, library)
         }
diff --git a/Zotero/Extensions/NSUserActivity+Activities.swift b/Zotero/Extensions/NSUserActivity+Activities.swift
index d1e56648b..a60cea150 100644
--- a/Zotero/Extensions/NSUserActivity+Activities.swift
+++ b/Zotero/Extensions/NSUserActivity+Activities.swift
@@ -11,6 +11,7 @@ import Foundation
 struct RestoredStateData {
     let key: String
     let libraryId: LibraryIdentifier
+    let collectionId: CollectionIdentifier
 }
 
 extension NSUserActivity {
@@ -21,9 +22,13 @@ extension NSUserActivity {
         return NSUserActivity(activityType: self.mainId)
     }
 
-    static func pdfActivity(for key: String, libraryId: LibraryIdentifier) -> NSUserActivity {
+    static func pdfActivity(for key: String, libraryId: LibraryIdentifier, collectionId: CollectionIdentifier) -> NSUserActivity {
         let activity = NSUserActivity(activityType: self.pdfId)
-        activity.addUserInfoEntries(from: ["key": key, "libraryId": self.libraryIdToString(libraryId)])
+        var pdfUserInfo: [AnyHashable: Any] = ["key": key, "libraryId": libraryIdToString(libraryId)]
+        if let collectionIdData = try? JSONEncoder().encode(collectionId) {
+            pdfUserInfo["collectionId"] = collectionIdData
+        }
+        activity.addUserInfoEntries(from: pdfUserInfo)
         return activity
     }
 
@@ -54,7 +59,18 @@ extension NSUserActivity {
 
     var restoredStateData: RestoredStateData? {
         guard self.activityType == NSUserActivity.pdfId,
-              let key = self.userInfo?["key"] as? String, let libraryString = self.userInfo?["libraryId"] as? String, let libraryId = self.stringToLibraryId(libraryString) else { return nil }
-        return RestoredStateData(key: key, libraryId: libraryId)
+              let userInfo,
+              let key = userInfo["key"] as? String,
+              let libraryString = userInfo["libraryId"] as? String,
+              let libraryId = stringToLibraryId(libraryString)
+        else { return nil }
+        var collectionId: CollectionIdentifier
+        if let collectionIdData = userInfo["collectionId"] as? Data,
+           let decodedCollectionId = try? JSONDecoder().decode(CollectionIdentifier.self, from: collectionIdData) {
+            collectionId = decodedCollectionId
+        } else {
+            collectionId = Defaults.shared.selectedCollectionId
+        }
+        return RestoredStateData(key: key, libraryId: libraryId, collectionId: collectionId)
     }
 }
diff --git a/Zotero/Scenes/AppCoordinator.swift b/Zotero/Scenes/AppCoordinator.swift
index b7cba1fc4..e7c0f8cf6 100644
--- a/Zotero/Scenes/AppCoordinator.swift
+++ b/Zotero/Scenes/AppCoordinator.swift
@@ -98,6 +98,8 @@ final class AppCoordinator: NSObject {
         guard let window = self.window else { return }
 
         let viewController: UIViewController
+        var urlContext: UIOpenURLContext?
+        var data: RestoredStateData?
         if !isLogged {
             let controller = OnboardingViewController(size: window.frame.size, htmlConverter: self.controllers.htmlAttributedStringConverter)
             controller.coordinatorDelegate = self
@@ -107,6 +109,7 @@ final class AppCoordinator: NSObject {
             self.conflictAlertQueueController = nil
             self.controllers.userControllers?.syncScheduler.syncController.set(coordinator: nil)
         } else {
+            (urlContext, data) = preprocess(connectionOptions: connectionOptions, session: session)
             let controller = MainViewController(controllers: self.controllers)
             viewController = controller
 
@@ -117,12 +120,24 @@ final class AppCoordinator: NSObject {
 
         DDLogInfo("AppCoordinator: show main screen logged \(isLogged ? "in" : "out"); animated=\(animated)")
         self.show(viewController: viewController, in: window, animated: animated)
-        guard let options = connectionOptions, let session = session else { return }
-        self.process(connectionOptions: options, session: session)
+        process(urlContext: urlContext, data: data)
     }
 
-    private func process(connectionOptions: UIScene.ConnectionOptions, session: UISceneSession) {
-        if let urlContext = connectionOptions.urlContexts.first, let urlController = self.controllers.userControllers?.customUrlController {
+    private func preprocess(connectionOptions: UIScene.ConnectionOptions?, session: UISceneSession?) -> (UIOpenURLContext?, RestoredStateData?) {
+        let urlContext = connectionOptions?.urlContexts.first
+        let userActivity = connectionOptions?.userActivities.first ?? session?.stateRestorationActivity
+        let data = userActivity?.restoredStateData
+        if let data {
+            // If scene had state stored, check if defaults need to be updated first
+            DDLogInfo("AppCoordinator: Preprocessing restored state - \(data)")
+            Defaults.shared.selectedLibrary = data.libraryId
+            Defaults.shared.selectedCollectionId = data.collectionId
+        }
+        return (urlContext, data)
+    }
+    
+    private func process(urlContext: UIOpenURLContext?, data: RestoredStateData?) {
+        if let urlContext, let urlController = self.controllers.userControllers?.customUrlController {
             // If scene was started from custom URL
             let sourceApp = urlContext.options.sourceApplication ?? "unknown"
             DDLogInfo("AppCoordinator: App launched by \(urlContext.url.absoluteString) from \(sourceApp)")
@@ -133,8 +148,8 @@ final class AppCoordinator: NSObject {
             }
         }
 
-        if let userActivity = connectionOptions.userActivities.first ?? session.stateRestorationActivity, let data = userActivity.restoredStateData {
-            DDLogInfo("AppCoordinator: Restored state - \(data)")
+        if let data {
+            DDLogInfo("AppCoordinator: Processing restored state - \(data)")
             // If scene had state stored, restore state
             self.showRestoredState(for: data)
         }
@@ -218,9 +233,17 @@ final class AppCoordinator: NSObject {
 
     private func showRestoredState(for data: RestoredStateData) {
         guard let mainController = self.window?.rootViewController as? MainViewController,
-              let (url, library) = self.loadRestoredStateData(forKey: data.key, libraryId: data.libraryId) else { return }
-        DDLogInfo("AppCoordinator: show restored state - \(data.key); \(data.libraryId); \(url.relativePath)")
-
+              let (url, library, collection) = self.loadRestoredStateData(forKey: data.key, libraryId: data.libraryId, collectionId: data.collectionId) else { return }
+        if let collection {
+            DDLogInfo("AppCoordinator: show restored state - \(data.key); \(data.libraryId); \(data.collectionId); \(url.relativePath)")
+            mainController.showItems(for: collection, in: library, saveCollectionToDefaults: true)
+        } else {
+            DDLogWarn("AppCoordinator: show restored state using all items collection - \(data.key); \(data.libraryId); \(url.relativePath)")
+            // Collection is missing, show all items instead
+            let collection = Collection(custom: .all)
+            mainController.showItems(for: collection, in: library, saveCollectionToDefaults: false)
+        }
+            
         mainController.getDetailCoordinator { [weak self] coordinator in
             guard let self = self, let window = self.window else { return }
             let controller = self.pdfController(key: data.key, library: library, url: url, page: nil, preselectedAnnotationKey: nil, detailCoordinator: coordinator)
@@ -240,11 +263,12 @@ final class AppCoordinator: NSObject {
         return navigationController
     }
 
-    private func loadRestoredStateData(forKey key: String, libraryId: LibraryIdentifier) -> (URL, Library)? {
+    private func loadRestoredStateData(forKey key: String, libraryId: LibraryIdentifier, collectionId: CollectionIdentifier) -> (URL, Library, Collection?)? {
         guard let dbStorage = self.controllers.userControllers?.dbStorage else { return nil }
 
         var url: URL?
         var library: Library?
+        var collection: Collection?
 
         do {
             try dbStorage.perform(on: .main, with: { coordinator in
@@ -258,7 +282,9 @@ final class AppCoordinator: NSObject {
                     case .local, .localAndChangedRemotely:
                         let file = Files.attachmentFile(in: libraryId, key: key, filename: filename, contentType: contentType)
                         url = file.createUrl()
-                        library = try coordinator.perform(request: ReadLibraryDbRequest(libraryId: libraryId))
+                        let (_collection, _library) = try coordinator.perform(request: ReadCollectionAndLibraryDbRequest(collectionId: collectionId, libraryId: libraryId))
+                        collection = _collection
+                        library = _library
 
                     case .remote, .remoteMissing: break
                     }
@@ -272,7 +298,7 @@ final class AppCoordinator: NSObject {
         }
 
         if let url = url, let library = library {
-            return (url, library)
+            return (url, library, collection)
         }
         return nil
     }
diff --git a/Zotero/Scenes/Detail/PDF/Views/PDFReaderViewController.swift b/Zotero/Scenes/Detail/PDF/Views/PDFReaderViewController.swift
index 18678f906..c6e3d8deb 100644
--- a/Zotero/Scenes/Detail/PDF/Views/PDFReaderViewController.swift
+++ b/Zotero/Scenes/Detail/PDF/Views/PDFReaderViewController.swift
@@ -206,7 +206,7 @@ class PDFReaderViewController: UIViewController {
     override func viewDidLoad() {
         super.viewDidLoad()
 
-        self.set(userActivity: .pdfActivity(for: self.viewModel.state.key, libraryId: self.viewModel.state.library.identifier))
+        self.set(userActivity: .pdfActivity(for: self.viewModel.state.key, libraryId: self.viewModel.state.library.identifier, collectionId: Defaults.shared.selectedCollectionId))
 
         self.view.backgroundColor = .systemGray6
         self.setupViews()
diff --git a/Zotero/Scenes/Main/Views/MainViewController.swift b/Zotero/Scenes/Main/Views/MainViewController.swift
index 9ec704981..498e22d63 100644
--- a/Zotero/Scenes/Main/Views/MainViewController.swift
+++ b/Zotero/Scenes/Main/Views/MainViewController.swift
@@ -15,7 +15,7 @@ import CocoaLumberjackSwift
 import RxSwift
 
 protocol MainCoordinatorDelegate: SplitControllerDelegate {
-    func showItems(for collection: Collection, in library: Library, isInitial: Bool)
+    func showItems(for collection: Collection, in library: Library, saveCollectionToDefaults: Bool)
 }
 
 protocol SplitControllerDelegate: AnyObject {
@@ -27,14 +27,8 @@ protocol MainCoordinatorSyncToolbarDelegate: AnyObject {
 }
 
 final class MainViewController: UISplitViewController {
-    private struct InitialLoadData {
-        let collection: Collection
-        let library: Library
-    }
-
     // Constants
     private let controllers: Controllers
-    private let defaultCollection: Collection
     private let disposeBag: DisposeBag
     // Variables
     private var didAppear: Bool = false
@@ -54,7 +48,6 @@ final class MainViewController: UISplitViewController {
 
     init(controllers: Controllers) {
         self.controllers = controllers
-        self.defaultCollection = Collection(custom: .all)
         self.disposeBag = DisposeBag()
 
         super.init(nibName: nil, bundle: nil)
@@ -109,44 +102,6 @@ final class MainViewController: UISplitViewController {
         self.showDetailViewController(navigationController, sender: nil)
     }
 
-    private func loadInitialDetailData(collectionId: CollectionIdentifier, libraryId: LibraryIdentifier) -> InitialLoadData? {
-        guard let dbStorage = self.controllers.userControllers?.dbStorage else { return nil }
-
-        DDLogInfo("MainViewController: load initial detail data collectionId=\(collectionId); libraryId=\(libraryId)")
-
-        var collection: Collection?
-        var library: Library?
-
-        do {
-            try dbStorage.perform(on: .main, with: { coordinator in
-                switch collectionId {
-                case .collection(let key):
-                    let rCollection = try coordinator.perform(request: ReadCollectionDbRequest(libraryId: libraryId, key: key))
-                    collection = Collection(object: rCollection, itemCount: 0)
-
-                case .search(let key):
-                    let rSearch = try coordinator.perform(request: ReadSearchDbRequest(libraryId: libraryId, key: key))
-                    collection = Collection(object: rSearch)
-
-                case .custom(let type):
-                    collection = Collection(custom: type)
-                }
-                library = try coordinator.perform(request: ReadLibraryDbRequest(libraryId: libraryId))
-            })
-        } catch let error {
-            DDLogError("MainViewController: can't load initial data - \(error)")
-            return nil
-        }
-
-        if let collection = collection, let library = library {
-            return InitialLoadData(collection: collection, library: library)
-        }
-
-        DDLogWarn("MainViewController: returning default library and collection")
-        return InitialLoadData(collection: Collection(custom: .all),
-                               library: Library(identifier: .custom(.myLibrary), name: "My Library", metadataEditable: true, filesEditable: true))
-    }
-
     // MARK: - Setups
 
     private func setupControllers() {
@@ -177,7 +132,10 @@ extension MainViewController: UISplitViewControllerDelegate {
 }
 
 extension MainViewController: MainCoordinatorDelegate {
-    func showItems(for collection: Collection, in library: Library, isInitial: Bool) {
+    func showItems(for collection: Collection, in library: Library, saveCollectionToDefaults: Bool) {
+        if saveCollectionToDefaults {
+            Defaults.shared.selectedCollectionId = collection.identifier
+        }
         guard !self.isSplit || self.detailCoordinator?.library != library || self.detailCoordinator?.collection.identifier != collection.identifier else { return }
         self.showItems(for: collection, in: library, searchItemKeys: nil)
     }
diff --git a/Zotero/Scenes/Master/Collections/Views/CollectionsViewController.swift b/Zotero/Scenes/Master/Collections/Views/CollectionsViewController.swift
index 3ac965587..dd6f68c55 100644
--- a/Zotero/Scenes/Master/Collections/Views/CollectionsViewController.swift
+++ b/Zotero/Scenes/Master/Collections/Views/CollectionsViewController.swift
@@ -44,7 +44,7 @@ final class CollectionsViewController: UICollectionViewController {
 
         if self.coordinatorDelegate?.isSplit == true {
             if let collection = self.viewModel.state.collectionTree.collection(for: self.viewModel.state.selectedCollectionId) {
-                self.coordinatorDelegate?.showItems(for: collection, in: self.viewModel.state.library, isInitial: true)
+                self.coordinatorDelegate?.showItems(for: collection, in: self.viewModel.state.library, saveCollectionToDefaults: false)
             } else {
                 self.viewModel.process(action: .select(.custom(.all)))
             }
@@ -86,7 +86,7 @@ final class CollectionsViewController: UICollectionViewController {
         }
 
         if state.changes.contains(.selection), let collection = state.collectionTree.collection(for: state.selectedCollectionId) {
-            self.coordinatorDelegate?.showItems(for: collection, in: state.library, isInitial: false)
+            self.coordinatorDelegate?.showItems(for: collection, in: state.library, saveCollectionToDefaults: true)
 
             if !requiresUpdate {
                 self.selectIfNeeded(collectionId: state.selectedCollectionId, tree: state.collectionTree, scrollToPosition: false)
diff --git a/Zotero/Scenes/Master/MasterTopCoordinator.swift b/Zotero/Scenes/Master/MasterTopCoordinator.swift
index f9d3ce0bd..fac39c87d 100644
--- a/Zotero/Scenes/Master/MasterTopCoordinator.swift
+++ b/Zotero/Scenes/Master/MasterTopCoordinator.swift
@@ -195,12 +195,9 @@ extension MasterTopCoordinator: MasterCollectionsCoordinatorDelegate {
         self.navigationController?.present(navigationController, animated: true, completion: nil)
     }
 
-    func showItems(for collection: Collection, in library: Library, isInitial: Bool) {
+    func showItems(for collection: Collection, in library: Library, saveCollectionToDefaults: Bool) {
         self.visibleLibraryId = library.identifier
-        if !isInitial {
-            Defaults.shared.selectedCollectionId = collection.identifier
-        }
-        self.mainCoordinatorDelegate.showItems(for: collection, in: library, isInitial: isInitial)
+        self.mainCoordinatorDelegate.showItems(for: collection, in: library, saveCollectionToDefaults: saveCollectionToDefaults)
     }
 
     var isSplit: Bool {