How to use firebase database in chrome extension : <p>I want to use it as part of my content script so that I can fetch data from my firebase database. However, I don't know how I can reference the script that's given in the firebase docs:</p>

<pre><code>&lt;script src="https://www.gstatic.com/firebasejs/5.3.0/firebase.js"&gt;&lt;/script&gt;
</code></pre>

<p>I know that if I was doing it all in the pop up html page, then I could load the script tag, but in the content script, there's no html page other than the content page, so I'm not sure if this is even possible.</p>
