diff --git a/lighthouse-viewer/app/src/main.js b/lighthouse-viewer/app/src/main.js
index 04148f74e680..e7346b60412b 100644
--- a/lighthouse-viewer/app/src/main.js
+++ b/lighthouse-viewer/app/src/main.js
@@ -45,8 +45,5 @@ Promise.all(loadPolyfillPromises).then(_ => {
 });
 
 if ('serviceWorker' in navigator) {
-  navigator.serviceWorker.register('sw.js').catch(e => {
-    // eslint-disable-next-line no-console
-    console.error('Error during service worker registration:', e);
-  });
+  navigator.serviceWorker.register('sw.js');
 }
diff --git a/lighthouse-viewer/app/sw.js b/lighthouse-viewer/app/sw.js
index b4212d9d03d3..d2b526f3ca0d 100644
--- a/lighthouse-viewer/app/sw.js
+++ b/lighthouse-viewer/app/sw.js
@@ -1 +1,18 @@
+/**
+ * @license
+ * Copyright 2017 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 // Intentionally empty for now.