1 files changed, 43 insertions, 0 deletions
diff --git a/browser/components/firefoxview/tests/browser/browser_tab_close_last_tab.js b/browser/components/firefoxview/tests/browser/browser_tab_close_last_tab.js
new file mode 100644
index 0000000000..021fd01bc2
--- /dev/null
+++ b/browser/components/firefoxview/tests/browser/browser_tab_close_last_tab.js
@@ -0,0 +1,43 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const URL = "https://example.com/";
+
+add_task(async function closing_last_tab_should_not_switch_to_fx_view() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.tabs.closeWindowWithLastTab", false]],
+  });
+  info("Opening window...");
+  const win = await BrowserTestUtils.openNewBrowserWindow({
+    waitForTabURL: "about:newtab",
+  });
+  const firstTab = win.gBrowser.selectedTab;
+  info("Opening Firefox View tab...");
+  await openFirefoxViewTab(win);
+  info("Switch back to new tab...");
+  await BrowserTestUtils.switchTab(win.gBrowser, firstTab);
+  info("Load web page in new tab...");
+  const loaded = BrowserTestUtils.browserLoaded(
+    win.gBrowser.selectedBrowser,
+    false,
+    URL
+  );
+  BrowserTestUtils.loadURIString(win.gBrowser.selectedBrowser, URL);
+  await loaded;
+  info("Opening new browser tab...");
+  const secondTab = await BrowserTestUtils.openNewForegroundTab(
+    win.gBrowser,
+    URL
+  );
+  info("Close all broswer tabs...");
+  await BrowserTestUtils.removeTab(firstTab);
+  await BrowserTestUtils.removeTab(secondTab);
+  isnot(
+    win.gBrowser.selectedTab,
+    win.FirefoxViewHandler.tab,
+    "The selected tab should not be the Firefox View tab"
+  );
+  await BrowserTestUtils.closeWindow(win);
+});