diff -r 000000000000 -r 6474c204b198 browser/components/search/test/browser_483086.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/search/test/browser_483086.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,51 @@
+/* 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/. */
+let gSS = Services.search;
+
+function test() {
+  waitForExplicitFinish();
+
+  function observer(aSubject, aTopic, aData) {
+    switch (aData) {
+      case "engine-added":
+        let engine = gSS.getEngineByName("483086a");
+        ok(engine, "Test engine 1 installed");
+        isnot(engine.searchForm, "foo://example.com",
+              "Invalid SearchForm URL dropped");
+        gSS.removeEngine(engine);
+        break;
+      case "engine-removed":
+        Services.obs.removeObserver(observer, "browser-search-engine-modified");
+        test2();
+        break;
+    }
+  }
+
+  Services.obs.addObserver(observer, "browser-search-engine-modified", false);
+  gSS.addEngine("http://mochi.test:8888/browser/browser/components/search/test/483086-1.xml",
+                Ci.nsISearchEngine.DATA_XML, "data:image/x-icon;%00",
+                false);
+}
+
+function test2() {
+  function observer(aSubject, aTopic, aData) {
+    switch (aData) {
+      case "engine-added":
+        let engine = gSS.getEngineByName("483086b");
+        ok(engine, "Test engine 2 installed");
+        is(engine.searchForm, "http://example.com", "SearchForm is correct");
+        gSS.removeEngine(engine);
+        break;
+      case "engine-removed":  
+        Services.obs.removeObserver(observer, "browser-search-engine-modified");
+        finish();
+        break;
+    }
+  }
+
+  Services.obs.addObserver(observer, "browser-search-engine-modified", false);
+  gSS.addEngine("http://mochi.test:8888/browser/browser/components/search/test/483086-2.xml",
+                Ci.nsISearchEngine.DATA_XML, "data:image/x-icon;%00",
+                false);
+}