Use Font Awesome icons from your own host/server. Update the latest releases from GitHub.
Choose the major version and install the latest minor version. For example: Choose major version 6, and install the latest of 6.x.xx. 
Currently supported for version 4, 5, 6, 7.
This plugin did not use CDN (content delivery network). If you want to use CDN, please use official Font Awesome plugin instead.
You can dequeue duplicated Font Awesome handles from other plugins or themes to prevent conflict.
You can disable enqueue from this plugin in case you would like to do it manually. 
To get asset files for manually enqueue, use this code.
<pre>
if (function_exists('rdfontawesome_get_enqueue_files')) {
 $result = rdfontawesome_get_enqueue_files();
 if (isset($result['css']) && is_array($result['css'])) {
 $faVersion = ($result['faVersion'] ?? false);
 foreach ($result['css'] as $css) {
 wp_enqueue_style('myplugin_fontawesome', $css, [], $faVersion);
 }
 unset($css, $faVersion);
 }
}
</pre>
To get URL base of the Font Awesome assets for use another files, use this code.
<pre>
if (function_exists('rdfontawesome_get_public_url_base')) {
 echo rdfontawesome_get_public_url_base();
}
</pre>
Font Awesome files are belong to https://fontawesome.com

Rundiz Font Awesome

Use Font Awesome from your host and update from GitHub.

Surbma

CherryPick Studios

With this plugin you can use the iconic font and CSS toolkit, the Font Awesome icons. It is loading the css and the font files from the MaxCDN network, which means super fast loading, wherever your visitors are on this planet.
You get also a very useful shortcode to use icons on your site: 
 [fa class=”fa-camera-retro”]
As you can see, you only need to add the icon name, that’s it. Isn’t it awesome? If you use the <code></code> code, the WordPress editor will remove it, because it is an empty code, which “should be removed”. So with this shortcode, you can use the Font Awesome icons wherever you want.
Font Awesome official site and all the icons: <a href="http://fortawesome.github.io/Font-Awesome/" rel="nofollow ugc">Font Awesome website »</a>

Surbma | Font Awesome

Font Awesome - The iconic font and CSS toolkit

Rundiz Font Awesome vs Surbma | Font Awesome