diff --git a/Libraries/LibWeb/DOM/Node.h b/Libraries/LibWeb/DOM/Node.h
index 8e4cae9fbfa..fb1eb12dae2 100644
--- a/Libraries/LibWeb/DOM/Node.h
+++ b/Libraries/LibWeb/DOM/Node.h
@@ -171,6 +171,7 @@ public:
     virtual bool is_html_object_element() const { return false; }
     virtual bool is_html_form_element() const { return false; }
     virtual bool is_html_image_element() const { return false; }
+    virtual bool is_html_iframe_element() const { return false; }
     virtual bool is_navigable_container() const { return false; }
     virtual bool is_lazy_loading() const { return false; }
 
diff --git a/Libraries/LibWeb/HTML/HTMLIFrameElement.h b/Libraries/LibWeb/HTML/HTMLIFrameElement.h
index cefa15e8e88..2df8ac4ffdf 100644
--- a/Libraries/LibWeb/HTML/HTMLIFrameElement.h
+++ b/Libraries/LibWeb/HTML/HTMLIFrameElement.h
@@ -40,6 +40,9 @@ private:
 
     virtual void initialize(JS::Realm&) override;
 
+    // ^DOM::Node
+    virtual bool is_html_iframe_element() const override { return true; }
+
     // ^DOM::Element
     virtual void post_connection() override;
     virtual void removed_from(Node*) override;
diff --git a/Libraries/LibWeb/HTML/Navigable.cpp b/Libraries/LibWeb/HTML/Navigable.cpp
index b4566640d06..446573d2a7d 100644
--- a/Libraries/LibWeb/HTML/Navigable.cpp
+++ b/Libraries/LibWeb/HTML/Navigable.cpp
@@ -1325,11 +1325,18 @@ WebIDL::ExceptionOr<void> Navigable::navigate(NavigateParams params)
         return {};
     }
 
-    // FIXME: 9. Let container be navigable's container.
-    // 10. If container is an iframe element and will lazy load element steps given container returns true,
+    // 9. Let container be navigable's container.
+    auto& container = m_container;
 
-    // FIXME: 10. If container is an iframe element and will lazy load element steps given container returns true,
+    // 10. If container is an iframe element and will lazy load element steps given container returns true,
     //     then stop intersection-observing a lazy loading element container and set container's lazy load resumption steps to null.
+    if (container && container->is_html_iframe_element()) {
+        auto& iframe_element = static_cast<HTMLIFrameElement&>(*container);
+        if (iframe_element.will_lazy_load_element()) {
+            iframe_element.document().stop_intersection_observing_a_lazy_loading_element(iframe_element);
+            iframe_element.set_lazy_load_resumption_steps(nullptr);
+        }
+    }
 
     // 11. If historyHandling is "auto", then:
     if (history_handling == Bindings::NavigationHistoryBehavior::Auto) {