1 files changed, 31 insertions, 0 deletions
diff --git a/dom/xhr/tests/browser_xhr_onchange_leak.js b/dom/xhr/tests/browser_xhr_onchange_leak.js
new file mode 100644
index 0000000000..03e8fbdb67
--- /dev/null
+++ b/dom/xhr/tests/browser_xhr_onchange_leak.js
@@ -0,0 +1,31 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// Bug 1336811 - An XHR that has a .onreadystatechange waiting should
+// not leak forever once the tab is closed. CC optimizations need to be
+// turned off once it is closed.
+
+add_task(async function test() {
+  // We need to reuse the content process when we navigate so the entire process
+  // with the possible-leaking window doesn't get torn down.
+  await SpecialPowers.pushPrefEnv({
+    set: [["dom.ipc.keepProcessesAlive.webIsolated.perOrigin", 1]],
+  });
+
+  const url =
+    "http://mochi.test:8888/browser/dom/xhr/tests/browser_xhr_onchange_leak.html";
+  let newTab = await BrowserTestUtils.openNewForegroundTab(gBrowser, url);
+  let browser = gBrowser.selectedBrowser;
+  let pageShowPromise = BrowserTestUtils.waitForContentEvent(
+    browser,
+    "pageshow",
+    true
+  );
+  BrowserTestUtils.loadURIString(browser, "http://mochi.test:8888/");
+  await pageShowPromise;
+
+  ok(pageShowPromise, "need to check something");
+  BrowserTestUtils.removeTab(newTab);
+});