1 files changed, 55 insertions, 0 deletions
diff --git a/browser/base/content/test/fullscreen/browser_fullscreen_newtab.js b/browser/base/content/test/fullscreen/browser_fullscreen_newtab.js
new file mode 100644
index 0000000000..d5a74a0aa3
--- /dev/null
+++ b/browser/base/content/test/fullscreen/browser_fullscreen_newtab.js
@@ -0,0 +1,55 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// This test verifies that when in fullscreen mode, and a new tab is opened,
+// fullscreen mode is exited and the url bar is focused.
+add_task(async function test_fullscreen_display_none() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["full-screen-api.enabled", true],
+      ["full-screen-api.allow-trusted-requests-only", false],
+    ],
+  });
+
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "https://example.org/browser/browser/base/content/test/fullscreen/fullscreen.html"
+  );
+
+  let fullScreenEntered = BrowserTestUtils.waitForEvent(
+    document,
+    "fullscreenchange",
+    false,
+    () => document.fullscreenElement
+  );
+
+  await SpecialPowers.spawn(tab.linkedBrowser, [], async () => {
+    content.document.getElementById("request").click();
+  });
+
+  await fullScreenEntered;
+
+  let fullScreenExited = BrowserTestUtils.waitForEvent(
+    document,
+    "fullscreenchange",
+    false,
+    () => !document.fullscreenElement
+  );
+
+  let focusPromise = BrowserTestUtils.waitForEvent(window, "focus");
+  EventUtils.synthesizeKey("T", { accelKey: true });
+  await focusPromise;
+
+  is(
+    document.activeElement,
+    gURLBar.inputField,
+    "url bar is focused after new tab opened"
+  );
+
+  await fullScreenExited;
+
+  BrowserTestUtils.removeTab(gBrowser.selectedTab);
+  BrowserTestUtils.removeTab(tab);
+});