1 files changed, 25 insertions, 0 deletions
diff --git a/toolkit/mozapps/extensions/test/xpcshell/test_childprocess.js b/toolkit/mozapps/extensions/test/xpcshell/test_childprocess.js
new file mode 100644
index 0000000000..d7661d52ad
--- /dev/null
+++ b/toolkit/mozapps/extensions/test/xpcshell/test_childprocess.js
@@ -0,0 +1,25 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// This verifies that the AddonManager refuses to load in child processes.
+
+// NOTE: This test does NOT load head_addons.js, because that would indirectly
+// load AddonManager.sys.mjs. In this test, we want to be the first to load the
+// AddonManager module to verify that it cannot be loaded in child processes.
+
+const { updateAppInfo } = ChromeUtils.importESModule(
+  "resource://testing-common/AppInfo.sys.mjs"
+);
+
+function run_test() {
+  updateAppInfo();
+  Services.appinfo.processType = Ci.nsIXULRuntime.PROCESS_TYPE_CONTENT;
+  try {
+    ChromeUtils.importESModule("resource://gre/modules/AddonManager.sys.mjs");
+    do_throw("AddonManager should have refused to load");
+  } catch (ex) {
+    info(ex.message);
+    Assert.ok(!!ex.message);
+  }
+}