diff --git a/Userland/Applets/ClipboardHistory/ClipboardHistoryModel.cpp b/Userland/Applets/ClipboardHistory/ClipboardHistoryModel.cpp
index 157b8add28..5b6725d007 100644
--- a/Userland/Applets/ClipboardHistory/ClipboardHistoryModel.cpp
+++ b/Userland/Applets/ClipboardHistory/ClipboardHistoryModel.cpp
@@ -155,7 +155,7 @@ void ClipboardHistoryModel::clear()
     invalidate_model_and_file(true).release_value_but_fixme_should_propagate_errors();
 }
 
-void ClipboardHistoryModel::config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value_string)
+void ClipboardHistoryModel::config_string_did_change(StringView domain, StringView group, StringView key, StringView value_string)
 {
     if (domain != "ClipboardHistory" || group != "ClipboardHistory")
         return;
diff --git a/Userland/Applets/ClipboardHistory/ClipboardHistoryModel.h b/Userland/Applets/ClipboardHistory/ClipboardHistoryModel.h
index 246d0e2bdc..029f624aeb 100644
--- a/Userland/Applets/ClipboardHistory/ClipboardHistoryModel.h
+++ b/Userland/Applets/ClipboardHistory/ClipboardHistoryModel.h
@@ -53,7 +53,7 @@ public:
     virtual GUI::Variant data(const GUI::ModelIndex&, GUI::ModelRole) const override;
 
     // ^Config::Listener
-    virtual void config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value) override;
+    virtual void config_string_did_change(StringView domain, StringView group, StringView key, StringView value) override;
 
 private:
     ClipboardHistoryModel();
diff --git a/Userland/Applications/Browser/BrowserWindow.cpp b/Userland/Applications/Browser/BrowserWindow.cpp
index 778557f445..40518f5fd5 100644
--- a/Userland/Applications/Browser/BrowserWindow.cpp
+++ b/Userland/Applications/Browser/BrowserWindow.cpp
@@ -681,7 +681,7 @@ void BrowserWindow::proxy_mappings_changed()
     });
 }
 
-void BrowserWindow::config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value)
+void BrowserWindow::config_string_did_change(StringView domain, StringView group, StringView key, StringView value)
 {
     if (domain != "Browser")
         return;
@@ -707,7 +707,7 @@ void BrowserWindow::config_string_did_change(DeprecatedString const& domain, Dep
     // TODO: ColorScheme
 }
 
-void BrowserWindow::config_bool_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, bool value)
+void BrowserWindow::config_bool_did_change(StringView domain, StringView group, StringView key, bool value)
 {
     dbgln("{} {} {} {}", domain, group, key, value);
     if (domain != "Browser" || group != "Preferences")
diff --git a/Userland/Applications/Browser/BrowserWindow.h b/Userland/Applications/Browser/BrowserWindow.h
index ba94bdeb23..fc6d39cf2e 100644
--- a/Userland/Applications/Browser/BrowserWindow.h
+++ b/Userland/Applications/Browser/BrowserWindow.h
@@ -56,8 +56,8 @@ private:
     ErrorOr<void> load_search_engines(GUI::Menu& settings_menu);
     void set_window_title_for_tab(Tab const&);
 
-    virtual void config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value) override;
-    virtual void config_bool_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, bool value) override;
+    virtual void config_string_did_change(StringView domain, StringView group, StringView key, StringView value) override;
+    virtual void config_bool_did_change(StringView domain, StringView group, StringView key, bool value) override;
 
     virtual void event(Core::Event&) override;
 
diff --git a/Userland/Applications/FileManager/DirectoryView.cpp b/Userland/Applications/FileManager/DirectoryView.cpp
index 1c410802a2..17f6b2999f 100644
--- a/Userland/Applications/FileManager/DirectoryView.cpp
+++ b/Userland/Applications/FileManager/DirectoryView.cpp
@@ -357,7 +357,7 @@ void DirectoryView::set_view_mode_from_string(DeprecatedString const& mode)
     }
 }
 
-void DirectoryView::config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value)
+void DirectoryView::config_string_did_change(StringView domain, StringView group, StringView key, StringView value)
 {
     if (domain != "FileManager" || group != "DirectoryView")
         return;
diff --git a/Userland/Applications/FileManager/DirectoryView.h b/Userland/Applications/FileManager/DirectoryView.h
index 258ed959eb..281c678f76 100644
--- a/Userland/Applications/FileManager/DirectoryView.h
+++ b/Userland/Applications/FileManager/DirectoryView.h
@@ -133,7 +133,7 @@ public:
     GUI::Action& view_as_columns_action() { return *m_view_as_columns_action; }
 
     // ^Config::Listener
-    virtual void config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value) override;
+    virtual void config_string_did_change(StringView domain, StringView group, StringView key, StringView value) override;
 
 private:
     explicit DirectoryView(Mode);
diff --git a/Userland/Applications/FileManager/main.cpp b/Userland/Applications/FileManager/main.cpp
index 3ed43c1e2e..8913462c8e 100644
--- a/Userland/Applications/FileManager/main.cpp
+++ b/Userland/Applications/FileManager/main.cpp
@@ -574,7 +574,7 @@ ErrorOr<int> run_in_desktop_mode()
     };
 
     struct BackgroundWallpaperListener : Config::Listener {
-        virtual void config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value) override
+        virtual void config_string_did_change(StringView domain, StringView group, StringView key, StringView value) override
         {
             if (domain == "WindowManager" && group == "Background" && key == "Wallpaper") {
                 if (value.is_empty()) {
diff --git a/Userland/Applications/Terminal/main.cpp b/Userland/Applications/Terminal/main.cpp
index 877d31f401..435b3fb37e 100644
--- a/Userland/Applications/Terminal/main.cpp
+++ b/Userland/Applications/Terminal/main.cpp
@@ -54,7 +54,7 @@ public:
     {
     }
 
-    virtual void config_bool_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, bool value) override
+    virtual void config_bool_did_change(StringView domain, StringView group, StringView key, bool value) override
     {
         VERIFY(domain == "Terminal");
 
@@ -68,7 +68,7 @@ public:
         }
     }
 
-    virtual void config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value) override
+    virtual void config_string_did_change(StringView domain, StringView group, StringView key, StringView value) override
     {
         VERIFY(domain == "Terminal");
 
@@ -94,7 +94,7 @@ public:
         }
     }
 
-    virtual void config_i32_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, i32 value) override
+    virtual void config_i32_did_change(StringView domain, StringView group, StringView key, i32 value) override
     {
         VERIFY(domain == "Terminal");
 
diff --git a/Userland/Games/Chess/ChessWidget.cpp b/Userland/Games/Chess/ChessWidget.cpp
index 5c5b977d37..3609e6c60d 100644
--- a/Userland/Games/Chess/ChessWidget.cpp
+++ b/Userland/Games/Chess/ChessWidget.cpp
@@ -744,7 +744,7 @@ bool ChessWidget::check_game_over(ClaimDrawBehavior claim_draw_behavior)
     return true;
 }
 
-void ChessWidget::config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value)
+void ChessWidget::config_string_did_change(StringView domain, StringView group, StringView key, StringView value)
 {
     if (domain != "Games"sv && group != "Chess"sv)
         return;
@@ -758,7 +758,7 @@ void ChessWidget::config_string_did_change(DeprecatedString const& domain, Depre
     }
 }
 
-void ChessWidget::config_bool_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, bool value)
+void ChessWidget::config_bool_did_change(StringView domain, StringView group, StringView key, bool value)
 {
     if (domain != "Games"sv && group != "Chess"sv)
         return;
diff --git a/Userland/Games/Chess/ChessWidget.h b/Userland/Games/Chess/ChessWidget.h
index 95731c5adb..effd928e2b 100644
--- a/Userland/Games/Chess/ChessWidget.h
+++ b/Userland/Games/Chess/ChessWidget.h
@@ -122,8 +122,8 @@ private:
 
     ChessWidget() = default;
 
-    virtual void config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value) override;
-    virtual void config_bool_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, bool value) override;
+    virtual void config_string_did_change(StringView domain, StringView group, StringView key, StringView value) override;
+    virtual void config_bool_did_change(StringView domain, StringView group, StringView key, bool value) override;
 
     bool check_game_over(ClaimDrawBehavior);
 
diff --git a/Userland/Games/Snake/Game.cpp b/Userland/Games/Snake/Game.cpp
index 3645e59ca0..5a9673aa6c 100644
--- a/Userland/Games/Snake/Game.cpp
+++ b/Userland/Games/Snake/Game.cpp
@@ -325,7 +325,7 @@ Direction Game::direction_to_position(Snake::Coordinate const& from, Snake::Coor
     VERIFY_NOT_REACHED();
 }
 
-void Game::config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value)
+void Game::config_string_did_change(StringView domain, StringView group, StringView key, StringView value)
 {
     if (domain == "Snake"sv && group == "Snake"sv && key == "SnakeSkin"sv) {
         set_skin_name(value);
@@ -333,7 +333,7 @@ void Game::config_string_did_change(DeprecatedString const& domain, DeprecatedSt
     }
 }
 
-void Game::config_u32_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, u32 value)
+void Game::config_u32_did_change(StringView domain, StringView group, StringView key, u32 value)
 {
     if (domain == "Snake"sv && group == "Snake"sv && key == "BaseColor"sv) {
         set_skin_color(Color::from_argb(value));
diff --git a/Userland/Games/Snake/Game.h b/Userland/Games/Snake/Game.h
index 955c936f59..e625570658 100644
--- a/Userland/Games/Snake/Game.h
+++ b/Userland/Games/Snake/Game.h
@@ -44,8 +44,8 @@ private:
     virtual void keydown_event(GUI::KeyEvent&) override;
     virtual void timer_event(Core::TimerEvent&) override;
 
-    virtual void config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value) override;
-    void config_u32_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, u32 value) override;
+    virtual void config_string_did_change(StringView domain, StringView group, StringView key, StringView value) override;
+    void config_u32_did_change(StringView domain, StringView group, StringView key, u32 value) override;
 
     void game_over();
     void spawn_fruit();
diff --git a/Userland/Libraries/LibCards/CardGame.cpp b/Userland/Libraries/LibCards/CardGame.cpp
index d4b06d8d89..973bff36b1 100644
--- a/Userland/Libraries/LibCards/CardGame.cpp
+++ b/Userland/Libraries/LibCards/CardGame.cpp
@@ -112,7 +112,7 @@ void CardGame::dump_layout() const
         dbgln("{}", stack);
 }
 
-void CardGame::config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value)
+void CardGame::config_string_did_change(StringView domain, StringView group, StringView key, StringView value)
 {
     if (domain == "Games" && group == "Cards") {
         if (key == "BackgroundColor") {
diff --git a/Userland/Libraries/LibCards/CardGame.h b/Userland/Libraries/LibCards/CardGame.h
index 226e441e8f..ed59d18371 100644
--- a/Userland/Libraries/LibCards/CardGame.h
+++ b/Userland/Libraries/LibCards/CardGame.h
@@ -57,7 +57,7 @@ protected:
     CardGame();
 
 private:
-    virtual void config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value) override;
+    virtual void config_string_did_change(StringView domain, StringView group, StringView key, StringView value) override;
 
     Vector<NonnullRefPtr<CardStack>> m_stacks;
 
diff --git a/Userland/Libraries/LibConfig/Listener.cpp b/Userland/Libraries/LibConfig/Listener.cpp
index 1b89245452..170aa6c536 100644
--- a/Userland/Libraries/LibConfig/Listener.cpp
+++ b/Userland/Libraries/LibConfig/Listener.cpp
@@ -29,31 +29,31 @@ void Listener::for_each(Function<void(Listener&)> callback)
         callback(*listener);
 }
 
-void Listener::config_string_did_change(DeprecatedString const&, DeprecatedString const&, DeprecatedString const&, DeprecatedString const&)
+void Listener::config_string_did_change(StringView, StringView, StringView, StringView)
 {
 }
 
-void Listener::config_i32_did_change(DeprecatedString const&, DeprecatedString const&, DeprecatedString const&, i32)
+void Listener::config_i32_did_change(StringView, StringView, StringView, i32)
 {
 }
 
-void Listener::config_u32_did_change(DeprecatedString const&, DeprecatedString const&, DeprecatedString const&, u32)
+void Listener::config_u32_did_change(StringView, StringView, StringView, u32)
 {
 }
 
-void Listener::config_bool_did_change(DeprecatedString const&, DeprecatedString const&, DeprecatedString const&, bool)
+void Listener::config_bool_did_change(StringView, StringView, StringView, bool)
 {
 }
 
-void Listener::config_key_was_removed(DeprecatedString const&, DeprecatedString const&, DeprecatedString const&)
+void Listener::config_key_was_removed(StringView, StringView, StringView)
 {
 }
 
-void Listener::config_group_was_removed(DeprecatedString const&, DeprecatedString const&)
+void Listener::config_group_was_removed(StringView, StringView)
 {
 }
 
-void Listener::config_group_was_added(DeprecatedString const&, DeprecatedString const&)
+void Listener::config_group_was_added(StringView, StringView)
 {
 }
 
diff --git a/Userland/Libraries/LibConfig/Listener.h b/Userland/Libraries/LibConfig/Listener.h
index 024449429c..0d33e32288 100644
--- a/Userland/Libraries/LibConfig/Listener.h
+++ b/Userland/Libraries/LibConfig/Listener.h
@@ -16,13 +16,13 @@ public:
 
     static void for_each(Function<void(Listener&)>);
 
-    virtual void config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value);
-    virtual void config_i32_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, i32 value);
-    virtual void config_u32_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, u32 value);
-    virtual void config_bool_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, bool value);
-    virtual void config_key_was_removed(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key);
-    virtual void config_group_was_removed(DeprecatedString const& domain, DeprecatedString const& group);
-    virtual void config_group_was_added(DeprecatedString const& domain, DeprecatedString const& group);
+    virtual void config_string_did_change(StringView domain, StringView group, StringView key, StringView value);
+    virtual void config_i32_did_change(StringView domain, StringView group, StringView key, i32 value);
+    virtual void config_u32_did_change(StringView domain, StringView group, StringView key, u32 value);
+    virtual void config_bool_did_change(StringView domain, StringView group, StringView key, bool value);
+    virtual void config_key_was_removed(StringView domain, StringView group, StringView key);
+    virtual void config_group_was_removed(StringView domain, StringView group);
+    virtual void config_group_was_added(StringView domain, StringView group);
 
 protected:
     Listener();
diff --git a/Userland/Libraries/LibGUI/Calendar.cpp b/Userland/Libraries/LibGUI/Calendar.cpp
index 5d42dc2af9..160e100ec2 100644
--- a/Userland/Libraries/LibGUI/Calendar.cpp
+++ b/Userland/Libraries/LibGUI/Calendar.cpp
@@ -769,7 +769,7 @@ size_t Calendar::day_of_week_index(DeprecatedString const& day_name)
     return AK::find_index(day_names.begin(), day_names.end(), day_name);
 }
 
-void Calendar::config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value)
+void Calendar::config_string_did_change(StringView domain, StringView group, StringView key, StringView value)
 {
     if (domain == "Calendar" && group == "View" && key == "FirstDayOfWeek") {
         m_first_day_of_week = static_cast<DayOfWeek>(day_of_week_index(value));
@@ -780,7 +780,7 @@ void Calendar::config_string_did_change(DeprecatedString const& domain, Deprecat
     }
 }
 
-void Calendar::config_i32_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, i32 value)
+void Calendar::config_i32_did_change(StringView domain, StringView group, StringView key, i32 value)
 {
     if (domain == "Calendar" && group == "View" && key == "WeekendLength") {
         m_weekend_length = value;
diff --git a/Userland/Libraries/LibGUI/Calendar.h b/Userland/Libraries/LibGUI/Calendar.h
index ddbb188de6..d9afb32db6 100644
--- a/Userland/Libraries/LibGUI/Calendar.h
+++ b/Userland/Libraries/LibGUI/Calendar.h
@@ -71,8 +71,8 @@ public:
         m_unadjusted_tile_size.set_height(height);
     }
 
-    virtual void config_string_did_change(DeprecatedString const&, DeprecatedString const&, DeprecatedString const&, DeprecatedString const&) override;
-    virtual void config_i32_did_change(DeprecatedString const&, DeprecatedString const&, DeprecatedString const&, i32 value) override;
+    virtual void config_string_did_change(StringView, StringView, StringView, StringView) override;
+    virtual void config_i32_did_change(StringView, StringView, StringView, i32 value) override;
 
     Function<void()> on_tile_click;
     Function<void()> on_tile_doubleclick;
diff --git a/Userland/Services/Taskbar/QuickLaunchWidget.cpp b/Userland/Services/Taskbar/QuickLaunchWidget.cpp
index 090b39a81d..9a933245f4 100644
--- a/Userland/Services/Taskbar/QuickLaunchWidget.cpp
+++ b/Userland/Services/Taskbar/QuickLaunchWidget.cpp
@@ -208,7 +208,7 @@ ErrorOr<void> QuickLaunchWidget::add_or_adjust_button(DeprecatedString const& bu
     return {};
 }
 
-void QuickLaunchWidget::config_key_was_removed(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key)
+void QuickLaunchWidget::config_key_was_removed(StringView domain, StringView group, StringView key)
 {
     if (domain == "Taskbar" && group == quick_launch) {
         auto button = find_child_of_type_named<GUI::Button>(key);
@@ -217,7 +217,7 @@ void QuickLaunchWidget::config_key_was_removed(DeprecatedString const& domain, D
     }
 }
 
-void QuickLaunchWidget::config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value)
+void QuickLaunchWidget::config_string_did_change(StringView domain, StringView group, StringView key, StringView value)
 {
     if (domain == "Taskbar" && group == quick_launch) {
         auto entry = QuickLaunchEntry::create_from_config_value(value);
diff --git a/Userland/Services/Taskbar/QuickLaunchWidget.h b/Userland/Services/Taskbar/QuickLaunchWidget.h
index d5497c5c54..35228425a3 100644
--- a/Userland/Services/Taskbar/QuickLaunchWidget.h
+++ b/Userland/Services/Taskbar/QuickLaunchWidget.h
@@ -83,8 +83,8 @@ public:
     static ErrorOr<NonnullRefPtr<QuickLaunchWidget>> create();
     virtual ~QuickLaunchWidget() override = default;
 
-    virtual void config_key_was_removed(DeprecatedString const&, DeprecatedString const&, DeprecatedString const&) override;
-    virtual void config_string_did_change(DeprecatedString const&, DeprecatedString const&, DeprecatedString const&, DeprecatedString const&) override;
+    virtual void config_key_was_removed(StringView, StringView, StringView) override;
+    virtual void config_string_did_change(StringView, StringView, StringView, StringView) override;
 
     virtual void drag_enter_event(GUI::DragEvent&) override;
     virtual void drop_event(GUI::DropEvent&) override;
diff --git a/Userland/Services/Taskbar/TaskbarWindow.cpp b/Userland/Services/Taskbar/TaskbarWindow.cpp
index 01030ead02..8412c37eaa 100644
--- a/Userland/Services/Taskbar/TaskbarWindow.cpp
+++ b/Userland/Services/Taskbar/TaskbarWindow.cpp
@@ -121,7 +121,7 @@ void TaskbarWindow::add_system_menu(NonnullRefPtr<GUI::Menu> system_menu)
     main->insert_child_before(*m_start_button, *m_quick_launch);
 }
 
-void TaskbarWindow::config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value)
+void TaskbarWindow::config_string_did_change(StringView domain, StringView group, StringView key, StringView value)
 {
     if (domain == "Taskbar" && group == "Clock" && key == "TimeFormat") {
         m_clock_widget->update_format(value);
diff --git a/Userland/Services/Taskbar/TaskbarWindow.h b/Userland/Services/Taskbar/TaskbarWindow.h
index 14fd25b4cf..a331bc2b99 100644
--- a/Userland/Services/Taskbar/TaskbarWindow.h
+++ b/Userland/Services/Taskbar/TaskbarWindow.h
@@ -28,7 +28,7 @@ public:
     static int taskbar_height() { return 27; }
     static int taskbar_icon_size() { return 16; }
 
-    virtual void config_string_did_change(DeprecatedString const&, DeprecatedString const&, DeprecatedString const&, DeprecatedString const&) override;
+    virtual void config_string_did_change(StringView, StringView, StringView, StringView) override;
     virtual void add_system_menu(NonnullRefPtr<GUI::Menu> system_menu);
 
 private: