diff --git a/widget/gtk/MozContainerWayland.cpp b/widget/gtk/MozContainerWayland.cpp
--- a/widget/gtk/MozContainerWayland.cpp
+++ b/widget/gtk/MozContainerWayland.cpp
@@ -702,10 +702,13 @@
 
 bool moz_container_wayland_egl_window_needs_size_update(MozContainer* container,
                                                         nsIntSize aSize,
                                                         int aScale) {
   MozContainerWayland* wl_container = &container->wl_container;
+  if (!wl_container->eglwindow) {
+    return false;
+  }
   if (wl_container->buffer_scale != aScale) {
     return true;
   }
   nsIntSize recentSize;
   wl_egl_window_get_attached_size(wl_container->eglwindow, &recentSize.width,