diff --git a/App/CompactViewController.swift b/App/CompactViewController.swift
index 6af26499..d64003d5 100644
--- a/App/CompactViewController.swift
+++ b/App/CompactViewController.swift
@@ -37,7 +37,7 @@ final class CompactViewController: UIHostingController<AnyView>, UISearchControl
 
     init(navigation: NavigationViewModel) {
         self.navigation = navigation
-        searchViewModel = SearchViewModel()
+        searchViewModel = SearchViewModel.shared
         let searchResult = SearchResults().environmentObject(searchViewModel)
         searchController = UISearchController(searchResultsController: UIHostingController(rootView: searchResult))
         super.init(rootView: AnyView(CompactView()))
diff --git a/Model/Defaulting.swift b/Model/Defaulting.swift
index 795ef8df..ccdd4e31 100644
--- a/Model/Defaulting.swift
+++ b/Model/Defaulting.swift
@@ -21,7 +21,7 @@ public protocol Defaulting: NSObjectProtocol {
 }
 
 final class UDefaults: NSObject, Defaulting {
-    subscript<Value>(key: Defaults.Key<Value>) -> Value where Value: DefaultsSerializable {
+    subscript<Value>(key: Defaults.Key<Value>) -> Value {
         get {
             Defaults[key]
         }
diff --git a/SwiftUI/Model/DefaultKeys.swift b/SwiftUI/Model/DefaultKeys.swift
index 2b449b71..64040a14 100644
--- a/SwiftUI/Model/DefaultKeys.swift
+++ b/SwiftUI/Model/DefaultKeys.swift
@@ -52,38 +52,3 @@ extension Defaults.Keys {
     static let windowURLs = Key<[URL]>("windowURLs", default: [])
     #endif
 }
-
-extension Defaults.Serializable where Self: Codable {
-    public static var bridge: Defaults.TopLevelCodableBridge<Self> { Defaults.TopLevelCodableBridge() }
-}
-
-extension Defaults.Serializable where Self: Codable & NSSecureCoding {
-    public static var bridge: Defaults.CodableNSSecureCodingBridge<Self> { Defaults.CodableNSSecureCodingBridge() }
-}
-
-extension Defaults.Serializable where Self: Codable & NSSecureCoding & Defaults.PreferNSSecureCoding {
-    public static var bridge: Defaults.NSSecureCodingBridge<Self> { Defaults.NSSecureCodingBridge() }
-}
-
-extension Defaults.Serializable where Self: Codable & RawRepresentable {
-    public static var bridge: Defaults.RawRepresentableCodableBridge<Self> { Defaults.RawRepresentableCodableBridge() }
-}
-
-extension Defaults.Serializable where Self: Codable & RawRepresentable & Defaults.PreferRawRepresentable {
-    public static var bridge: Defaults.RawRepresentableBridge<Self> { Defaults.RawRepresentableBridge() }
-}
-
-extension Defaults.Serializable where Self: RawRepresentable {
-    public static var bridge: Defaults.RawRepresentableBridge<Self> { Defaults.RawRepresentableBridge() }
-}
-extension Defaults.Serializable where Self: NSSecureCoding {
-    public static var bridge: Defaults.NSSecureCodingBridge<Self> { Defaults.NSSecureCodingBridge() }
-}
-
-extension Defaults.CollectionSerializable where Element: Defaults.Serializable {
-    public static var bridge: Defaults.CollectionBridge<Self> { Defaults.CollectionBridge() }
-}
-
-extension Defaults.SetAlgebraSerializable where Element: Defaults.Serializable & Hashable {
-    public static var bridge: Defaults.SetAlgebraBridge<Self> { Defaults.SetAlgebraBridge() }
-}
diff --git a/Tests/TestDefaults.swift b/Tests/TestDefaults.swift
index c122614d..5cc3d8d6 100644
--- a/Tests/TestDefaults.swift
+++ b/Tests/TestDefaults.swift
@@ -19,7 +19,7 @@ import Defaults
 
 final class TestDefaults: NSObject, Defaulting {
     
-    var dict: [Defaults.AnyKey: any DefaultsSerializable] = [:]
+    var dict: [Defaults._AnyKey: AnyObject] = [:]
     
     func setup() {
         self[.categoriesToLanguages] = [:]
@@ -29,13 +29,13 @@ final class TestDefaults: NSObject, Defaulting {
         self[.libraryLanguageCodes] = Set<String>()
     }
     
-    subscript<Value>(key: Defaults.Key<Value>) -> Value where Value: DefaultsSerializable {
+    subscript<Value>(key: Defaults.Key<Value>) -> Value {
         get {
             // swiftlint:disable:next force_cast
             dict[key] as! Value
         }
         set {
-            dict[key] = newValue
+            dict[key] = newValue as AnyObject
         }
     }
 }
diff --git a/ViewModel/BrowserViewModel.swift b/ViewModel/BrowserViewModel.swift
index a584af8b..ab7c9e0e 100644
--- a/ViewModel/BrowserViewModel.swift
+++ b/ViewModel/BrowserViewModel.swift
@@ -259,17 +259,33 @@ final class BrowserViewModel: NSObject, ObservableObject,
 
     @MainActor
     func updateLastOpened() {
-        guard let tab = try? Database.shared.viewContext.existingObject(with: tabID) as? Tab else { return }
-        tab.lastOpened = Date()
+        let currentTabID = tabID
+        Task {
+            Database.shared.performBackgroundTask { context in
+                guard let tab = try? context.existingObject(with: currentTabID) as? Tab else {
+                    return
+                }
+                tab.lastOpened = Date()
+                try? context.save()
+            }
+        }
     }
 
     @MainActor
     func persistState() {
-        guard let tab = try? Database.shared.viewContext.existingObject(with: tabID) as? Tab else {
-            return
+        let webData = webView.interactionState as? Data
+        let currentTabID = tabID
+        Task {
+            Database.shared.performBackgroundTask { context in
+                guard let tab = try? context.existingObject(with: currentTabID) as? Tab else {
+                    return
+                }
+                tab.interactionState = webData
+                if context.hasChanges {
+                    try? context.save()
+                }
+            }
         }
-        tab.interactionState = webView.interactionState as? Data
-        try? Database.shared.viewContext.save()
     }
 
     // MARK: - Content Loading
diff --git a/ViewModel/NavigationViewModel.swift b/ViewModel/NavigationViewModel.swift
index 322be8d2..37b88768 100644
--- a/ViewModel/NavigationViewModel.swift
+++ b/ViewModel/NavigationViewModel.swift
@@ -97,6 +97,7 @@ final class NavigationViewModel: ObservableObject {
     /// Delete a single tab, and select another tab
     /// - Parameter tabID: ID of the tab to delete
     func deleteTab(tabID: NSManagedObjectID) {
+        let currentItemValue = currentItem
         Database.shared.performBackgroundTask { context in
             let sortByCreation = [NSSortDescriptor(key: "created", ascending: false)]
             guard let tabs: [Tab] = try? context.fetch(Tab.fetchRequest(predicate: nil,
@@ -105,7 +106,7 @@ final class NavigationViewModel: ObservableObject {
                 return
             }
             let newlySelectedTab: Tab?
-            if case let .tab(selectedTabID) = self.currentItem, selectedTabID == tabID {
+            if case let .tab(selectedTabID) = currentItemValue, selectedTabID == tabID {
                 // select a closeBy tab if the currently selected tab is to be deleted
                 newlySelectedTab = tabs.closeBy(toWhere: { $0.objectID == tabID }) ?? Self.makeTab(context: context)
             } else if tabs.count == 1 {
diff --git a/ViewModel/SearchViewModel.swift b/ViewModel/SearchViewModel.swift
index 28bb1971..f0b50883 100644
--- a/ViewModel/SearchViewModel.swift
+++ b/ViewModel/SearchViewModel.swift
@@ -23,13 +23,15 @@ final class SearchViewModel: NSObject, ObservableObject, NSFetchedResultsControl
     @Published private(set) var zimFiles: [UUID: ZimFile]  // ID of zim files that are included in search
     @Published private(set) var inProgress = false
     @Published private(set) var results = [SearchResult]()
+    
+    static let shared = SearchViewModel()
 
     private let fetchedResultsController: NSFetchedResultsController<ZimFile>
     private var searchSubscriber: AnyCancellable?
     @ZimActor
     private let queue = OperationQueue()
 
-    override init() {
+    override private init() {
         // initialize fetched results controller
         let predicate = NSPredicate(format: "includedInSearch == true AND fileURLBookmark != nil")
         fetchedResultsController = NSFetchedResultsController(
@@ -39,7 +41,7 @@ final class SearchViewModel: NSObject, ObservableObject, NSFetchedResultsControl
             cacheName: nil
         )
 
-        // initilze zim file IDs
+        // initialize zim file IDs
         try? fetchedResultsController.performFetch()
         zimFiles = fetchedResultsController.fetchedObjects?.reduce(into: [:]) { result, zimFile in
             result?[zimFile.fileID] = zimFile
diff --git a/Views/Bookmarks.swift b/Views/Bookmarks.swift
index 1af813be..0f9abff6 100644
--- a/Views/Bookmarks.swift
+++ b/Views/Bookmarks.swift
@@ -29,7 +29,7 @@ struct Bookmarks: View {
 
     var body: some View {
         LazyVGrid(columns: ([gridItem]), spacing: 12) {
-            ForEach(bookmarks) { bookmark in
+            ForEach(bookmarks, id: \.self) { bookmark in
                 Button {
                     NotificationCenter.openURL(bookmark.articleURL)
                     if horizontalSizeClass == .compact {
@@ -54,8 +54,8 @@ struct Bookmarks: View {
                 Message(text: LocalString.bookmark_overlay_empty_title)
             }
         }
+#if os(iOS)
         .toolbar {
-            #if os(iOS)
             ToolbarItem(placement: .navigationBarLeading) {
                 if #unavailable(iOS 16), horizontalSizeClass == .regular {
                     Button {
@@ -65,8 +65,8 @@ struct Bookmarks: View {
                     }
                 }
             }
-            #endif
         }
+#endif
     }
 
     private var gridItem: GridItem {
diff --git a/Views/BrowserTab.swift b/Views/BrowserTab.swift
index 0ec4ef8a..a7763ff8 100644
--- a/Views/BrowserTab.swift
+++ b/Views/BrowserTab.swift
@@ -21,7 +21,7 @@ struct BrowserTab: View {
     @Environment(\.scenePhase) private var scenePhase
     @EnvironmentObject private var browser: BrowserViewModel
     @EnvironmentObject private var library: LibraryViewModel
-    @StateObject private var search = SearchViewModel()
+    @StateObject private var search = SearchViewModel.shared
 
     var body: some View {
         let model = if FeatureFlags.hasLibrary {
diff --git a/project.yml b/project.yml
index 1edfc49e..2ce20703 100644
--- a/project.yml
+++ b/project.yml
@@ -46,7 +46,7 @@ settings:
 packages:
   Defaults:
     url: https://github.com/sindresorhus/Defaults
-    majorVersion: 6.0.0
+    majorVersion: 8.2.0
   StripeApplePay:
     url: https://github.com/CodeLikeW/stripe-apple-pay
     majorVersion: 24.0.0