Firefox Inspector DOM test

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Firefox DOM updates'
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

my-messages.service.js

import Ember from 'ember';

export default Ember.Service.extend({
  messages: [],
  add(contents) {
    this.messages.pushObject(messages);
  }
});

twiddle.json

{
  "version": "0.5.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}

update-dom.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  myMessages: Ember.inject.service(),
  messages: Ember.computed.alias('myMessages.messages')
});

update-dom.template.hbs

{{#each messages as |message|}}
  {{message.content}}
{{/each}}