diff --git a/Userland/Libraries/LibWeb/HTML/Window.cpp b/Userland/Libraries/LibWeb/HTML/Window.cpp
index 9be67eb7e8..ab07a46022 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Window.cpp
@@ -56,11 +56,24 @@ private:
     u32 m_handle { 0 };
 };
 
+NonnullRefPtr<Window> Window::create()
+{
+    return adopt_ref(*new Window);
+}
+
 NonnullRefPtr<Window> Window::create_with_document(DOM::Document& document)
 {
     return adopt_ref(*new Window(document));
 }
 
+Window::Window()
+    : DOM::EventTarget()
+    , m_performance(make<HighResolutionTime::Performance>(*this))
+    , m_crypto(Crypto::Crypto::create())
+    , m_screen(CSS::Screen::create({}, *this))
+{
+}
+
 Window::Window(DOM::Document& document)
     : DOM::EventTarget()
     , m_associated_document(document)
@@ -670,4 +683,9 @@ void Window::cancel_idle_callback(u32 handle)
     });
 }
 
+void Window::set_associated_document(DOM::Document& document)
+{
+    m_associated_document = document;
+}
+
 }
diff --git a/Userland/Libraries/LibWeb/HTML/Window.h b/Userland/Libraries/LibWeb/HTML/Window.h
index 41766c024e..dcb711f506 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.h
+++ b/Userland/Libraries/LibWeb/HTML/Window.h
@@ -34,6 +34,7 @@ class Window final
     , public HTML::GlobalEventHandlers
     , public HTML::WindowEventHandlers {
 public:
+    static NonnullRefPtr<Window> create();
     static NonnullRefPtr<Window> create_with_document(DOM::Document&);
     ~Window();
 
@@ -51,6 +52,7 @@ public:
     // https://html.spec.whatwg.org/multipage/window-object.html#concept-document-window
     DOM::Document const& associated_document() const { return *m_associated_document; }
     DOM::Document& associated_document() { return *m_associated_document; }
+    void set_associated_document(DOM::Document&);
 
     // https://html.spec.whatwg.org/multipage/window-object.html#window-bc
     HTML::BrowsingContext const* browsing_context() const { return m_associated_document->browsing_context(); }
@@ -127,6 +129,7 @@ public:
     AnimationFrameCallbackDriver& animation_frame_callback_driver() { return m_animation_frame_callback_driver; }
 
 private:
+    Window();
     explicit Window(DOM::Document&);
 
     // ^HTML::GlobalEventHandlers