diff --git a/dom/webidl/Cache.webidl b/dom/webidl/Cache.webidl
new file mode 100644
index 000000000000..099701d2bdcd
--- /dev/null
+++ b/dom/webidl/Cache.webidl
@@ -0,0 +1,45 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/.
+ *
+ * The origin of this IDL file is
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ *
+ */
+
+// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#cache
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::cache::Cache::PrefEnabled"]
+interface Cache {
+[Throws]
+Promise<Response> match(RequestInfo request, optional CacheQueryOptions options);
+[Throws]
+Promise<sequence<Response>> matchAll(optional RequestInfo request, optional CacheQueryOptions options);
+[Throws]
+Promise<void> add(RequestInfo request);
+[Throws]
+Promise<void> addAll(sequence<RequestInfo> requests);
+[Throws]
+Promise<void> put(RequestInfo request, Response response);
+[Throws]
+Promise<boolean> delete(RequestInfo request, optional CacheQueryOptions options);
+[Throws]
+Promise<sequence<Request>> keys(optional RequestInfo request, optional CacheQueryOptions options);
+};
+
+dictionary CacheQueryOptions {
+boolean ignoreSearch = false;
+boolean ignoreMethod = false;
+boolean ignoreVary = false;
+boolean prefixMatch = false;
+DOMString cacheName;
+};
+
+dictionary CacheBatchOperation {
+DOMString type;
+Request request;
+Response response;
+CacheQueryOptions options;
+};
diff --git a/dom/webidl/CacheStorage.webidl b/dom/webidl/CacheStorage.webidl
new file mode 100644
index 000000000000..ef845a64a1a5
--- /dev/null
+++ b/dom/webidl/CacheStorage.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/.
+ *
+ * The origin of this IDL file is
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ *
+ */
+
+// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#cache-storage
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::cache::CacheStorage::PrefEnabled"]
+interface CacheStorage {
+[Throws]
+Promise<Response> match(RequestInfo request, optional CacheQueryOptions options);
+[Throws]
+Promise<boolean> has(DOMString cacheName);
+[Throws]
+Promise<Cache> open(DOMString cacheName);
+[Throws]
+Promise<boolean> delete(DOMString cacheName);
+[Throws]
+Promise<sequence<DOMString>> keys();
+};
diff --git a/dom/webidl/moz.build b/dom/webidl/moz.build
index e94fb23a9373..be94266c8fa2 100644
--- a/dom/webidl/moz.build
+++ b/dom/webidl/moz.build
@@ -57,6 +57,8 @@ WEBIDL_FILES = [
     'BroadcastChannel.webidl',
     'BrowserElement.webidl',
     'BrowserElementDictionaries.webidl',
+    'Cache.webidl',
+    'CacheStorage.webidl',
     'CallsList.webidl',
     'CameraCapabilities.webidl',
     'CameraControl.webidl',