1 files changed, 95 insertions, 0 deletions
diff --git a/browser/extensions/webcompat/shims/firebase.js b/browser/extensions/webcompat/shims/firebase.js
new file mode 100644
index 0000000000..8c2508efb8
--- /dev/null
+++ b/browser/extensions/webcompat/shims/firebase.js
@@ -0,0 +1,95 @@
+/* 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/. */
+
+"use strict";
+
+/**
+ * Bug 1767407 - Shim Firebase
+ *
+ * Sites relying on firebase-messaging.js will break in Private
+ * browsing mode because it assumes that they require service
+ * workers and indexedDB, when they generally do not.
+ */
+
+/* globals cloneInto */
+
+(function() {
+  const win = window.wrappedJSObject;
+  const emptyObj = new win.Object();
+  const emptyArr = new win.Array();
+  const emptyMsg = cloneInto({ message: "" }, window);
+  const noOpFn = cloneInto(function() {}, window, { cloneFunctions: true });
+
+  if (!win.indexedDB) {
+    const idb = {
+      open: () => win.Promise.reject(emptyMsg),
+    };
+
+    Object.defineProperty(win, "indexedDB", {
+      value: cloneInto(idb, window, { cloneFunctions: true }),
+    });
+  }
+
+  // bug 1778993
+  for (const name of [
+    "IDBCursor",
+    "IDBDatabase",
+    "IDBIndex",
+    "IDBOpenDBRequest",
+    "IDBRequest",
+    "IDBTransaction",
+  ]) {
+    if (!win[name]) {
+      Object.defineProperty(win, name, { value: emptyObj });
+    }
+  }
+
+  if (!win.serviceWorker) {
+    const sw = {
+      addEventListener() {},
+      getRegistrations: () => win.Promise.resolve(emptyArr),
+      register: () => win.Promise.reject(emptyMsg),
+    };
+
+    Object.defineProperty(navigator.wrappedJSObject, "serviceWorker", {
+      value: cloneInto(sw, window, { cloneFunctions: true }),
+    });
+
+    // bug 1779536
+    Object.defineProperty(navigator.wrappedJSObject.serviceWorker, "ready", {
+      value: new win.Promise(noOpFn),
+    });
+  }
+
+  // bug 1750699
+  if (!win.PushManager) {
+    Object.defineProperty(win, "PushManager", { value: emptyObj });
+  }
+
+  // bug 1750699
+  if (!win.PushSubscription) {
+    const ps = {
+      prototype: {
+        getKey() {},
+      },
+    };
+
+    Object.defineProperty(win, "PushSubscription", {
+      value: cloneInto(ps, window, { cloneFunctions: true }),
+    });
+  }
+
+  // bug 1750699
+  if (!win.ServiceWorkerRegistration) {
+    const swr = {
+      prototype: {
+        showNotification() {},
+      },
+    };
+
+    Object.defineProperty(win, "ServiceWorkerRegistration", {
+      value: cloneInto(swr, window, { cloneFunctions: true }),
+    });
+  }
+})();