Override the Notification API constructor to create silent notifications when the webContents is muted

lib/renderer/override.js

@@ -248,3 +248,14 @@ Object.defineProperty(document, 'visibilityState', {
     return cachedVisibilityState
   }
 })
+
+// Make notifications silent if the the current webContents is muted
+const NativeNotification = window.Notification
+class Notification extends NativeNotification {
+  constructor (title, opts) {
+    super(title, Object.assign({
+      silent: remote.getCurrentWebContents().isAudioMuted()
+    }, opts))
+  }
+}
+window.Notification = Notification