1 files changed, 45 insertions, 0 deletions
diff --git a/browser/base/content/test/tabs/browser_tabswitch_contextmenu.js b/browser/base/content/test/tabs/browser_tabswitch_contextmenu.js
new file mode 100644
index 0000000000..bd671a86c6
--- /dev/null
+++ b/browser/base/content/test/tabs/browser_tabswitch_contextmenu.js
@@ -0,0 +1,45 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Don't switch tabs via the keyboard while the contextmenu is open.
+ */
+add_task(async function cant_tabswitch_mid_contextmenu() {
+  let tab1 = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "https://example.com/idontexist"
+  );
+  let tab2 = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "https://example.org/idontexist"
+  );
+
+  const contextMenu = document.getElementById("contentAreaContextMenu");
+  let promisePopupShown = BrowserTestUtils.waitForPopupEvent(
+    contextMenu,
+    "shown"
+  );
+  await BrowserTestUtils.synthesizeMouse(
+    "body",
+    0,
+    0,
+    {
+      type: "contextmenu",
+      button: 2,
+    },
+    tab2.linkedBrowser
+  );
+  await promisePopupShown;
+  EventUtils.synthesizeKey("VK_TAB", { accelKey: true });
+  ok(tab2.selected, "tab2 should stay selected");
+  BrowserTestUtils.removeTab(tab1);
+  BrowserTestUtils.removeTab(tab2);
+  let promisePopupHidden = BrowserTestUtils.waitForPopupEvent(
+    contextMenu,
+    "hidden"
+  );
+  contextMenu.hidePopup();
+  await promisePopupHidden;
+});