diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/HTML/BUILD.gn b/Meta/gn/secondary/Userland/Libraries/LibWeb/HTML/BUILD.gn
index 7f27d50928f..5b8fb0c291e 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/HTML/BUILD.gn
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/HTML/BUILD.gn
@@ -165,6 +165,7 @@ source_set("HTML") {
     "ToggleEvent.cpp",
     "TrackEvent.cpp",
     "TraversableNavigable.cpp",
+    "UserActivation.cpp",
     "VideoTrack.cpp",
     "VideoTrackList.cpp",
     "WebViewHints.cpp",
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni b/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
index 2a3785ef86c..bf0391f6754 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
@@ -225,6 +225,7 @@ standard_idl_files = [
   "//Userland/Libraries/LibWeb/HTML/TimeRanges.idl",
   "//Userland/Libraries/LibWeb/HTML/ToggleEvent.idl",
   "//Userland/Libraries/LibWeb/HTML/TrackEvent.idl",
+  "//Userland/Libraries/LibWeb/HTML/UserActivation.idl",
   "//Userland/Libraries/LibWeb/HTML/VideoTrack.idl",
   "//Userland/Libraries/LibWeb/HTML/VideoTrackList.idl",
   "//Userland/Libraries/LibWeb/HTML/Worker.idl",
diff --git a/Userland/Libraries/LibWeb/CMakeLists.txt b/Userland/Libraries/LibWeb/CMakeLists.txt
index 3e6532ee084..23ae9847a08 100644
--- a/Userland/Libraries/LibWeb/CMakeLists.txt
+++ b/Userland/Libraries/LibWeb/CMakeLists.txt
@@ -432,6 +432,7 @@ set(SOURCES
     HTML/ToggleEvent.cpp
     HTML/TrackEvent.cpp
     HTML/TraversableNavigable.cpp
+    HTML/UserActivation.cpp
     HTML/VideoTrack.cpp
     HTML/VideoTrackList.cpp
     HTML/WebViewHints.cpp
diff --git a/Userland/Libraries/LibWeb/Forward.h b/Userland/Libraries/LibWeb/Forward.h
index ab0cc5f346d..ef86b907313 100644
--- a/Userland/Libraries/LibWeb/Forward.h
+++ b/Userland/Libraries/LibWeb/Forward.h
@@ -466,6 +466,7 @@ class ToggleEvent;
 class TrackEvent;
 struct TransferDataHolder;
 class TraversableNavigable;
+class UserActivation;
 class VideoTrack;
 class VideoTrackList;
 class Window;
diff --git a/Userland/Libraries/LibWeb/HTML/Navigator.cpp b/Userland/Libraries/LibWeb/HTML/Navigator.cpp
index 52aab8c4e7e..bbfcd70df0a 100644
--- a/Userland/Libraries/LibWeb/HTML/Navigator.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Navigator.cpp
@@ -62,6 +62,7 @@ void Navigator::visit_edges(Cell::Visitor& visitor)
     visitor.visit(m_mime_type_array);
     visitor.visit(m_plugin_array);
     visitor.visit(m_clipboard);
+    visitor.visit(m_user_activation);
 }
 
 JS::NonnullGCPtr<MimeTypeArray> Navigator::mime_types()
@@ -85,6 +86,13 @@ JS::NonnullGCPtr<Clipboard::Clipboard> Navigator::clipboard()
     return *m_clipboard;
 }
 
+JS::NonnullGCPtr<UserActivation> Navigator::user_activation()
+{
+    if (!m_user_activation)
+        m_user_activation = heap().allocate<UserActivation>(realm(), realm());
+    return *m_user_activation;
+}
+
 // https://w3c.github.io/pointerevents/#dom-navigator-maxtouchpoints
 WebIDL::Long Navigator::max_touch_points()
 {
diff --git a/Userland/Libraries/LibWeb/HTML/Navigator.h b/Userland/Libraries/LibWeb/HTML/Navigator.h
index 050ff216a06..d8a2eb03a26 100644
--- a/Userland/Libraries/LibWeb/HTML/Navigator.h
+++ b/Userland/Libraries/LibWeb/HTML/Navigator.h
@@ -14,6 +14,7 @@
 #include <LibWeb/HTML/NavigatorLanguage.h>
 #include <LibWeb/HTML/NavigatorOnLine.h>
 #include <LibWeb/HTML/PluginArray.h>
+#include <LibWeb/HTML/UserActivation.h>
 
 namespace Web::HTML {
 
@@ -47,6 +48,7 @@ public:
     [[nodiscard]] JS::NonnullGCPtr<MimeTypeArray> mime_types();
     [[nodiscard]] JS::NonnullGCPtr<PluginArray> plugins();
     [[nodiscard]] JS::NonnullGCPtr<Clipboard::Clipboard> clipboard();
+    [[nodiscard]] JS::NonnullGCPtr<UserActivation> user_activation();
 
     static WebIDL::Long max_touch_points();
 
@@ -65,6 +67,9 @@ private:
 
     // https://w3c.github.io/clipboard-apis/#dom-navigator-clipboard
     JS::GCPtr<Clipboard::Clipboard> m_clipboard;
+
+    // https://html.spec.whatwg.org/multipage/interaction.html#dom-navigator-useractivation
+    JS::GCPtr<UserActivation> m_user_activation;
 };
 
 }
diff --git a/Userland/Libraries/LibWeb/HTML/Navigator.idl b/Userland/Libraries/LibWeb/HTML/Navigator.idl
index f0c1ff1fb00..b2d2f7faf15 100644
--- a/Userland/Libraries/LibWeb/HTML/Navigator.idl
+++ b/Userland/Libraries/LibWeb/HTML/Navigator.idl
@@ -6,6 +6,7 @@
 #import <HTML/NavigatorOnLine.idl>
 #import <HTML/NavigatorConcurrentHardware.idl>
 #import <HTML/PluginArray.idl>
+#import <HTML/UserActivation.idl>
 
 // https://html.spec.whatwg.org/multipage/system-state.html#navigator
 [Exposed=Window]
@@ -17,6 +18,9 @@ interface Navigator {
 
     // https://w3c.github.io/pointerevents/#extensions-to-the-navigator-interface
     readonly attribute long maxTouchPoints;
+
+    // https://html.spec.whatwg.org/multipage/interaction.html#useractivation
+    [SameObject] readonly attribute UserActivation userActivation;
 };
 
 // NOTE: As NavigatorContentUtils, NavigatorCookies, NavigatorPlugins, and NavigatorAutomationInformation
diff --git a/Userland/Libraries/LibWeb/HTML/UserActivation.cpp b/Userland/Libraries/LibWeb/HTML/UserActivation.cpp
new file mode 100644
index 00000000000..719e1f4d42e
--- /dev/null
+++ b/Userland/Libraries/LibWeb/HTML/UserActivation.cpp
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/Bindings/UserActivationPrototype.h>
+#include <LibWeb/HTML/UserActivation.h>
+#include <LibWeb/HTML/Window.h>
+
+namespace Web::HTML {
+
+JS_DEFINE_ALLOCATOR(UserActivation);
+
+WebIDL::ExceptionOr<JS::NonnullGCPtr<UserActivation>> UserActivation::construct_impl(JS::Realm& realm)
+{
+    return realm.heap().allocate<UserActivation>(realm, realm);
+}
+
+UserActivation::UserActivation(JS::Realm& realm)
+    : PlatformObject(realm)
+{
+}
+
+void UserActivation::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(UserActivation);
+}
+
+// https://html.spec.whatwg.org/multipage/interaction.html#dom-useractivation-hasbeenactive
+bool UserActivation::has_been_active() const
+{
+    // The hasBeenActive getter steps are to return true if this's relevant global object has sticky activation, and false otherwise.
+    return verify_cast<HTML::Window>(relevant_global_object(*this)).has_sticky_activation();
+}
+
+// https://html.spec.whatwg.org/multipage/interaction.html#dom-useractivation-isactive
+bool UserActivation::is_active() const
+{
+    // The isActive getter steps are to return true if this's relevant global object has transient activation, and false otherwise.
+    return verify_cast<HTML::Window>(relevant_global_object(*this)).has_transient_activation();
+}
+
+}
diff --git a/Userland/Libraries/LibWeb/HTML/UserActivation.h b/Userland/Libraries/LibWeb/HTML/UserActivation.h
new file mode 100644
index 00000000000..916d6e55ca2
--- /dev/null
+++ b/Userland/Libraries/LibWeb/HTML/UserActivation.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/Bindings/PlatformObject.h>
+
+namespace Web::HTML {
+
+class UserActivation final : public Bindings::PlatformObject {
+    WEB_PLATFORM_OBJECT(UserActivation, Bindings::PlatformObject);
+    JS_DECLARE_ALLOCATOR(UserActivation);
+
+public:
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<UserActivation>> construct_impl(JS::Realm&);
+    virtual ~UserActivation() override = default;
+
+    bool has_been_active() const;
+    bool is_active() const;
+
+private:
+    UserActivation(JS::Realm&);
+
+    virtual void initialize(JS::Realm&) override;
+};
+
+}
diff --git a/Userland/Libraries/LibWeb/HTML/UserActivation.idl b/Userland/Libraries/LibWeb/HTML/UserActivation.idl
new file mode 100644
index 00000000000..83b50796c5b
--- /dev/null
+++ b/Userland/Libraries/LibWeb/HTML/UserActivation.idl
@@ -0,0 +1,6 @@
+// https://html.spec.whatwg.org/multipage/interaction.html#useractivation
+[Exposed=Window]
+interface UserActivation {
+    readonly attribute boolean hasBeenActive;
+    readonly attribute boolean isActive;
+};
diff --git a/Userland/Libraries/LibWeb/idl_files.cmake b/Userland/Libraries/LibWeb/idl_files.cmake
index 7a9e9c32bc4..f88ba77e9b4 100644
--- a/Userland/Libraries/LibWeb/idl_files.cmake
+++ b/Userland/Libraries/LibWeb/idl_files.cmake
@@ -209,6 +209,7 @@ libweb_js_bindings(HTML/TextMetrics)
 libweb_js_bindings(HTML/TimeRanges)
 libweb_js_bindings(HTML/ToggleEvent)
 libweb_js_bindings(HTML/TrackEvent)
+libweb_js_bindings(HTML/UserActivation)
 libweb_js_bindings(HTML/VideoTrack)
 libweb_js_bindings(HTML/VideoTrackList)
 libweb_js_bindings(HTML/Window GLOBAL)