diff -r 000000000000 -r 6474c204b198 toolkit/mozapps/extensions/test/xpcshell/test_bug564030.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/mozapps/extensions/test/xpcshell/test_bug564030.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,63 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// Tests that upgrading an incompatible add-on to a compatible one forces an
+// EM restart
+
+const profileDir = gProfD.clone();
+profileDir.append("extensions");
+
+function run_test() {
+  do_test_pending();
+  createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "2", "1.9.2");
+
+  var dest = writeInstallRDFForExtension({
+    id: "addon1@tests.mozilla.org",
+    version: "1.0",
+    name: "Test",
+    targetApplications: [{
+      id: "xpcshell@tests.mozilla.org",
+      minVersion: "1",
+      maxVersion: "1"
+    }]
+  }, profileDir);
+  // Attempt to make this look like it was added some time in the past so
+  // the update makes the last modified time change.
+  setExtensionModifiedTime(dest, dest.lastModifiedTime - 5000);
+
+  startupManager();
+
+  AddonManager.getAddonByID("addon1@tests.mozilla.org", callback_soon(function(a) {
+    do_check_neq(a, null);
+    do_check_eq(a.version, "1.0");
+    do_check_false(a.userDisabled);
+    do_check_true(a.appDisabled);
+    do_check_false(a.isActive);
+    do_check_false(isExtensionInAddonsList(profileDir, a.id));
+
+    writeInstallRDFForExtension({
+      id: "addon1@tests.mozilla.org",
+      version: "2.0",
+      name: "Test",
+      targetApplications: [{
+        id: "xpcshell@tests.mozilla.org",
+        minVersion: "1",
+        maxVersion: "2"
+      }]
+    }, profileDir);
+
+    restartManager();
+
+    AddonManager.getAddonByID("addon1@tests.mozilla.org", function(a) {
+      do_check_neq(a, null);
+      do_check_eq(a.version, "2.0");
+      do_check_false(a.userDisabled);
+      do_check_false(a.appDisabled);
+      do_check_true(a.isActive);
+      do_check_true(isExtensionInAddonsList(profileDir, a.id));
+
+      do_execute_soon(do_test_finished);
+    });
+  }));
+}