Bug 1953179 - Fix enter key handling on toolbarbuttons in tab group menu. r=dwalker,tabbrowser-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D245220

browser/components/tabbrowser/content/tabgroup-menu.js

@@ -886,7 +886,11 @@
           this.close(false);
           break;
         case KeyEvent.DOM_VK_RETURN:
+          // When focus is on a toolbarbutton, we need to wait for the command
+          // event, which will ultimately close the panel as well.
+          if (event.target.nodeName != "toolbarbutton") {
             this.close();
+          }
           break;
       }
     }

browser/components/tabbrowser/test/browser/tabs/browser_tab_groups.js

@@ -1830,7 +1830,13 @@ add_task(async function test_tabGroupCreatePanel() {
   info("Removing group via delete button");
   panelHidden = BrowserTestUtils.waitForPopupEvent(tabgroupPanel, "hidden");
   let removePromise = BrowserTestUtils.waitForEvent(group, "TabGroupRemoved");
-  tabgroupPanel.querySelector("#tabGroupEditor_deleteGroup").click();
+  let deleteButton = tabgroupPanel.querySelector("#tabGroupEditor_deleteGroup");
+  if (AppConstants.platform == "macosx") {
+    deleteButton.click();
+  } else {
+    deleteButton.focus();
+    EventUtils.synthesizeKey("VK_RETURN");
+  }
   await Promise.all([panelHidden, removePromise]);
   tabGroupCreatedTrigger.uninit();
 });