diff --git a/app/javascript/mastodon/service_worker/entry.js b/app/javascript/mastodon/service_worker/entry.js
index a4aebcd3a7..3381fb0a18 100644
--- a/app/javascript/mastodon/service_worker/entry.js
+++ b/app/javascript/mastodon/service_worker/entry.js
@@ -1,67 +1,5 @@
-import { ExpirationPlugin } from 'workbox-expiration';
-import { precacheAndRoute } from 'workbox-precaching';
-import { registerRoute } from 'workbox-routing';
-import { CacheFirst } from 'workbox-strategies';
-
 import { handleNotificationClick, handlePush } from './web_push_notifications';
 
-const CACHE_NAME_PREFIX = 'mastodon-';
-
-function openWebCache() {
-  return caches.open(`${CACHE_NAME_PREFIX}web`);
-}
-
-function fetchRoot() {
-  return fetch('/', { credentials: 'include', redirect: 'manual' });
-}
-
-precacheAndRoute(self.__WB_MANIFEST);
-
-registerRoute(
-  /locale_.*\.js$/,
-  new CacheFirst({
-    cacheName: `${CACHE_NAME_PREFIX}locales`,
-    plugins: [
-      new ExpirationPlugin({
-        maxAgeSeconds: 30 * 24 * 60 * 60, // 1 month
-        maxEntries: 5,
-      }),
-    ],
-  }),
-);
-
-registerRoute(
-  ({ request }) => request.destination === 'font',
-  new CacheFirst({
-    cacheName: `${CACHE_NAME_PREFIX}fonts`,
-    plugins: [
-      new ExpirationPlugin({
-        maxAgeSeconds: 30 * 24 * 60 * 60, // 1 month
-        maxEntries: 5,
-      }),
-    ],
-  }),
-);
-
-registerRoute(
-  ({ request }) => request.destination === 'image',
-  new CacheFirst({
-    cacheName: `m${CACHE_NAME_PREFIX}media`,
-    plugins: [
-      new ExpirationPlugin({
-        maxAgeSeconds: 7 * 24 * 60 * 60, // 1 week
-        maxEntries: 256,
-      }),
-    ],
-  }),
-);
-
-// Cause a new version of a registered Service Worker to replace an existing one
-// that is already installed, and replace the currently active worker on open pages.
-self.addEventListener('install', function(event) {
-  event.waitUntil(Promise.all([openWebCache(), fetchRoot()]).then(([cache, root]) => cache.put('/', root)));
-});
-
 self.addEventListener('activate', function(event) {
   event.waitUntil(self.clients.claim());
 });
@@ -71,14 +9,10 @@ self.addEventListener('fetch', function(event) {
 
   if (url.pathname === '/auth/sign_out') {
     const asyncResponse = fetch(event.request);
-    const asyncCache = openWebCache();
 
     event.respondWith(asyncResponse.then(response => {
       if (response.ok || response.type === 'opaqueredirect') {
-        return Promise.all([
-          asyncCache.then(cache => cache.delete('/')),
-          indexedDB.deleteDatabase('mastodon'),
-        ]).then(() => response);
+        return indexedDB.deleteDatabase('mastodon').then(() => response);
       }
 
       return response;