diff --git a/Tests/LibWeb/Text/expected/no-window-resize-on-load.txt b/Tests/LibWeb/Text/expected/no-window-resize-on-load.txt
new file mode 100644
index 00000000000..6e2c76e43db
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/no-window-resize-on-load.txt
@@ -0,0 +1 @@
+resize count: 0
diff --git a/Tests/LibWeb/Text/input/no-window-resize-on-load.html b/Tests/LibWeb/Text/input/no-window-resize-on-load.html
new file mode 100644
index 00000000000..f6f061b85b7
--- /dev/null
+++ b/Tests/LibWeb/Text/input/no-window-resize-on-load.html
@@ -0,0 +1,12 @@
+<script>
+    var resizeCount = 0;
+    onresize = function() {
+        ++resizeCount;
+    }
+</script>
+<script src="include.js"></script>
+<script>
+    test(() => {
+        println("resize count: " + resizeCount);
+    })
+</script>
diff --git a/Userland/Libraries/LibWeb/DOM/Document.cpp b/Userland/Libraries/LibWeb/DOM/Document.cpp
index 6eb875b2a4c..c650f048895 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Document.cpp
@@ -2553,11 +2553,14 @@ void Document::run_the_resize_steps()
     //    fire an event named resize at the Window object associated with doc.
 
     auto viewport_size = viewport_rect().size().to_type<int>();
+    bool is_initial_size = !m_last_viewport_size.has_value();
+
     if (m_last_viewport_size == viewport_size)
         return;
     m_last_viewport_size = viewport_size;
 
-    window()->dispatch_event(DOM::Event::create(realm(), UIEvents::EventNames::resize));
+    if (!is_initial_size)
+        window()->dispatch_event(DOM::Event::create(realm(), UIEvents::EventNames::resize));
 
     schedule_layout_update();
 }
diff --git a/Userland/Libraries/LibWeb/DOM/Document.h b/Userland/Libraries/LibWeb/DOM/Document.h
index e6e2b0d2c11..1ea000d879f 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.h
+++ b/Userland/Libraries/LibWeb/DOM/Document.h
@@ -786,7 +786,7 @@ class Document
     bool m_page_showing { false };
 
     // Used by run_the_resize_steps().
-    Gfx::IntSize m_last_viewport_size;
+    Optional<Gfx::IntSize> m_last_viewport_size;
 
     HashTable<ViewportClient*> m_viewport_clients;