<p><pre><code>  &gt; where is the built-in Facebook plugin?
</code></pre>
Years ago Facebook Messenger was actually built into Firefox. I remember using it myself, but have no idea what&#x27;s become of that effort since then. See <a href="https:&#x2F;&#x2F;www.facebook.com&#x2F;notes&#x2F;facebook-engineering&#x2F;under-the-hood-facebook-messenger-for-firefox&#x2F;10151175913223920&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.facebook.com&#x2F;notes&#x2F;facebook-engineering&#x2F;under-th...</a><p><pre><code>  &gt; Where&#x27;s the built-in Netflix extension?
</code></pre>
Users demanding Netflix support is literally the reason why Mozilla was strongarmed into adding support for EME, despite trying to hold out against it for so long.<p><pre><code>  &gt; Amazon shopping support?
</code></pre>
Click in the search box, type a query, and at the bottom of the suggestions dropdown you&#x27;ll see that Amazon is one of the search engines supported out-of-the-box. I actually use this fairly regularly.<p><pre><code>  &gt; What if Microsoft cuts a deal to build in Bing support?
</code></pre>
Just like Amazon, Bing is already supported out-of-the-box, as is Google, Yahoo, DuckDuckGo, eBay, Twitter, and Wikipedia. Mozilla has regional partnerships where they get paid to install such search engines, so you&#x27;ll get Baidu as your default in China and Yandex as your default in Russia. These even vary per platform: in the US, Google is the default on Ubuntu, and Yahoo is the default on Windows. If Yahoo collapses within the next few years, I fully expect Microsoft to begin paying Mozilla to make Bing the default on Windows.<p>These default search engines are how Mozilla makes 95% of its income (donations are basically a drop in the bucket, and because of tax laws they aren&#x27;t allowed to use donation funds to finance Firefox development anyway). Mozilla sees this as a problem and has been actively looking for ways to diversify its revenue streams in the past years (go read any of their past financial statements to see them explicitly categorize their over-reliance on search engine revenue as a potential threat to the company), which has led to things like FirefoxOS (in the hope that telecoms would toss some cash Mozilla&#x27;s way) and the &quot;suggested sites&quot; on the New Tab page. This why I find it extremely unlikely that someone &quot;cut a deal&quot;, because Mozilla would <i>want</i> people to know that they&#x27;re succeeding at the task of finding alternate revenue streams.