     <h1>
        Disabling Prototype Extensions
      </h1>

        <a href="https://github.com/ember-learn/guides-source/edit/master/guides/v2.1.0/configuring-ember/disabling-prototype-extensions.md" target="_blank" class="edit-page" rel="noopener">
          <img class="edit-icon" src="/images/pen.svg" alt="Edit pencil">
        </a>
    </div>
    <hr>

    <div id="ember50550" class="ember-view"><p>By default, Ember.js will extend the prototypes of native JavaScript
objects in the following ways:</p>
