title: JavaScript Firebase Cloud Messaging Client App: not receiving notifications in Google Chrome
body: <p>I am experiencing the following behaviour: web notifications are received in firefox, however, not in google chrome.</p>
  
  <p>To reproduce the issue, I have downloaded the Firebase quickstart-js repo (<a href="https://github.com/firebase/quickstart-js.git" rel="nofollow noreferrer">https://github.com/firebase/quickstart-js.git</a>) and replaced the initialization config. Then started a local webserver with <code>python -m SimpleHTTPServer 8000</code>.</p>
  
  <p>Using the tokens displayed both in chrome and firefox, I sent a Downstream HTTP messages (JSON) to firebase:</p>
  
  <p><strong>With multiple registration ids:</strong></p>
  
  <pre><code>curl -X POST -H "Authorization: key=&lt;KEY&gt;" -H "Content-Type: application/json" -d '{
      "notification": {
      "title": "Background Message Title",
      "body": "Background message body",
      "click_action" : "https://dummypage.com"
    },
    "priority": "high",
    "registration_ids" : ["&lt;TOKEN-FIREFOX&gt;", "&lt;TOKEN-CHROME&gt;"]
  }' "https://fcm.googleapis.com/fcm/send"
  </code></pre>
  
  <p><strong>With a single id:</strong></p>
  
  <pre><code>curl -X POST -H "Authorization: key=&lt;KEY&gt;" -H "Content-Type: application/json" -d '{
      "notification": {
      "title": "Background Message Title",
      "body": "Background message body",
      "click_action" : "https://dummypage.com"
    },
    "priority": "high",
    "to" : "&lt;TOKEN-FIREFOX || TOKEN-CHROME&gt;"
  }' "https://fcm.googleapis.com/fcm/send"
  </code></pre>
  
  <p>The message arrived on the firefox client and is logged to the console, however, the chrome client did not receive any message. I have tried this with firebase versions 3.5.3 and 3.6.0.</p>