u to completely disable the extensions
described above.</p>
<p>To do so, simply set the <code>EmberENV.EXTEND_PROTOTYPES</code> flag to <code>false</code>:</p>
<div class="filename javascript"><div class="ribbon"></div><span>config/environment.js</span><pre class="language-javascript line-numbers"><code class="javascript language-javascript"><span class="token constant">ENV</span> <span class="token operator">=</span> <span class="token punctuation">{</span>
  <span class="token literal-property property">E