Show ServiceWorkers in chrome://inspect.

chrome/browser/resources/inspect/inspect.css

 /*
  * Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 body {
   color: rgb(48, 57, 66);
   font-family: Arial, sans-serif;
   font-size: 13px;
@@ skipping 24 matching lines @@
   -webkit-flex: 1;
 }
 
 #caption {
   color: rgb(92, 97, 102);
   font-size: 150%;
   padding-bottom: 10px;
   padding-left: 20px;
 }
 
+#serviceworker-internals {
+  visibility: hidden;
+}
+
 .tab-header {
   -webkit-border-start: 6px solid transparent;
   padding-left: 15px;
 }
 
 .tab-header.selected {
   -webkit-border-start-color: rgb(78, 87, 100);
 }
 
 .tab-header > button {
@@ skipping 328 matching lines @@
 }
 
 #port-forwarding-config-buttons {
   align-items: center;
   display: flex;
 }
 
 #port-forwarding-config-buttons > label {
   flex-grow: 1
 }