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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=292789
+-->
+<head>
+  <title>Test for Bug 292789</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=292789">Mozilla Bug 292789</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  <script src="chrome://global/content/treeUtils.js"></script>
+  <script type="application/javascript" src="chrome://mozapps/content/update/history.js"></script>
+  <script id="resjs" type="application/javascript"></script>
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+/** Test for Bug 292789
+ *
+ * Selectively allow access to allowlisted chrome packages
+ * even for ALLOW_CHROME mechanisms (<script>, <img> etc)
+ */
+
+/* import-globals-from ../../../toolkit/content/treeUtils.js */
+/* import-globals-from ../../../toolkit/mozapps/update/content/history.js */
+
+SimpleTest.waitForExplicitFinish();
+
+let ChromeUtils = {
+  import() { return {}; },
+};
+
+/** <script src=""> test */
+function testScriptSrc(aCallback) {
+    is(typeof gTreeUtils.sort, "function",
+       "content can still load <script> from chrome://global");
+
+    /** Try to find an export from history.js.  We will find it if it is
+     *  improperly not blocked, otherwise it will be "undefined".
+     */
+    is(typeof gUpdateHistory, "undefined",
+       "content should not be able to load <script> from chrome://mozapps");
+
+    /** make sure the last one didn't pass because someone
+     *  moved history.js
+     */
+    var resjs = document.getElementById("resjs");
+    resjs.onload = scriptOnload;
+    resjs.src = "resource://gre/chrome/toolkit/content/mozapps/update/history.js";
+    document.getElementById("content").appendChild(resjs);
+
+    function scriptOnload() {
+      is(typeof gUpdateHistory.onLoad, "function",
+         "history.js has not moved unexpectedly");
+
+      // trigger the callback
+      if (aCallback)
+        aCallback();
+    }
+}
+
+/** <img src=""> tests */
+var img_global = "chrome://global/skin/media/error.png";
+var img_mozapps = "chrome://mozapps/skin/extensions/extensionGeneric.svg";
+var res_mozapps = "resource://gre/chrome/toolkit/skin/classic/mozapps/extensions/extensionGeneric.svg";
+
+var imgTests = [[img_global, "success"],
+                [img_mozapps, "fail"],
+                [res_mozapps, "success"]];
+
+var curImgTest = 0;
+
+function runImgTest() {
+    var test = imgTests[curImgTest++];
+    var callback = curImgTest == imgTests.length ? finishTest : runImgTest;
+    loadImage(test[0], test[1], callback);
+}
+
+function finishTest() {
+  SimpleTest.finish();
+}
+
+function fail(event) {
+    is("fail", event.target.expected,
+       "content should not be allowed to load " + event.target.src);
+    if (event.target.callback)
+      event.target.callback();
+}
+
+function success(event) {
+    is("success", event.target.expected,
+       "content should be able to load " + event.target.src);
+    if (event.target.callback)
+      event.target.callback();
+}
+
+function loadImage(uri, expect, callback) {
+    var img = document.createElement("img");
+    img.onerror = fail;
+    img.onload = success;
+    img.expected = expect;
+    img.callback = callback;
+    img.src = uri;
+    // document.getElementById("content").appendChild(img);
+}
+
+// Start off the script src test, and have it start the img tests when complete.
+// Temporarily allow content to access all resource:// URIs.
+SpecialPowers.pushPrefEnv({
+  set: [
+    ["security.all_resource_uri_content_accessible", true],
+  ],
+}, () => testScriptSrc(runImgTest));
+</script>
+</pre>
+</body>
+</html>