2 files changed, 7 insertions, 1 deletions
diff --git a/toolkit/content/widgets/moz-message-bar/moz-message-bar.mjs b/toolkit/content/widgets/moz-message-bar/moz-message-bar.mjs
index 58f41c28e4..d83de5d29f 100644
--- a/toolkit/content/widgets/moz-message-bar/moz-message-bar.mjs
+++ b/toolkit/content/widgets/moz-message-bar/moz-message-bar.mjs
@@ -69,7 +69,7 @@ export default class MozMessageBar extends MozLitElement {
     this.dismissable = false;
   }
 
-  onSlotchange(e) {
+  onSlotchange() {
     let actions = this.actionsSlotEl.assignedNodes();
     this.actionsEl.classList.toggle("active", actions.length);
   }
diff --git a/toolkit/content/widgets/moz-message-bar/moz-message-bar.stories.mjs b/toolkit/content/widgets/moz-message-bar/moz-message-bar.stories.mjs
index 65803eed9f..6f19c45aee 100644
--- a/toolkit/content/widgets/moz-message-bar/moz-message-bar.stories.mjs
+++ b/toolkit/content/widgets/moz-message-bar/moz-message-bar.stories.mjs
@@ -121,3 +121,9 @@ WithSupportLink.args = {
   hasSupportLink: true,
   hasActionButton: false,
 };
+
+export const WithHeading = Template.bind({});
+WithHeading.args = {
+  ...Default.args,
+  l10nId: "moz-message-bar-message-heading",
+};