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diff --git a/dom/serviceworkers/test/test_navigationPreload_disable_crash.html b/dom/serviceworkers/test/test_navigationPreload_disable_crash.html
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+++ b/dom/serviceworkers/test/test_navigationPreload_disable_crash.html
@@ -0,0 +1,52 @@
+<!--
+  Any copyright is dedicated to the Public Domain.
+  http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Failure to create a Promise shouldn't crash</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<p id="display"></p>
+<div id="content" style="display: none">
+</div>
+<pre id="test"></pre>
+<script class="testbody" type="text/javascript">
+  async function runTest() {
+    const iframe = document.createElement('iframe');
+    document.getElementById("content").appendChild(iframe);
+
+    const serviceWorker = iframe.contentWindow.navigator.serviceWorker;
+    const worker = await iframe.contentWindow.navigator.serviceWorker.register("empty.js", {});
+
+    iframe.remove();
+
+    // We can't wait for this promise to settle, because the global's
+    // browsing context has been discarded when the iframe was removed.
+    // We're just checking if this call crashes, which would happen
+    // immediately, so ignoring the promise should be fine.
+    worker.navigationPreload.disable();
+    ok(true, "navigationPreload.disable() failed but didn't crash.");
+
+    SimpleTest.finish();
+  }
+
+  SimpleTest.waitForExplicitFinish();
+  // We can't call unregister on the worker after its browsing context has been
+  // discarded, so use SpecialPowers.removeAllServiceWorkerData.
+  SimpleTest.registerCleanupFunction(() => SpecialPowers.removeAllServiceWorkerData());
+  onload = function() {
+    SpecialPowers.pushPrefEnv({"set": [
+      ["dom.serviceWorkers.exemptFromPerDomainMax", true],
+      ["dom.serviceWorkers.enabled", true],
+      ["dom.serviceWorkers.navigationPreload.enabled", true],
+      ["dom.serviceWorkers.testing.enabled", true],
+    ]}, runTest);
+  };
+</script>
+</pre>
+</body>
+</html>