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.

WPOrbit Support

Perfect Font Awesome Integration plugin seamlessly adds latest font awesome icons to your wordpress site.
How to use this plugin ?
Install the plugin. 
Go to Posts > Add New 
In the visual editor you will find [FA ICON] tab.
Following settings are available :
1) Fa Icon Code:(Eg: fa fa-pencil) 
List of all codes are available on : 
https://fontawesome.com/icons
2) Color:(Eg: #333333) leave blank for default
3) Size : Choose from 2x to 5x larger.
4) Alignment : If your icon is off from the text, use this option.
5) Border: Gives a border to the icon.
6) Float: Make the icon float left or right.
7) Animate: Give a spinning animation to font awesome icon. Useful in loading type icons.
8) Rotate/Flip: Rotate the icon 90 to 270 degrees, Flip vertically and Horizontally.
Press ok to insert the shortcode in post.

Perfect Font Awesome Integration

The plugin works great, but the average user will be difficult to deal with Font Awesome classes and CSS colors.

It would be nice to add a selection of icons as in plugin https://wordpress.org/plugins/better-font-awesome/ and color selection as in plugin https://wordpress.org/plugins/dco-shortcodes-menu/.

P.S. If you will properly prepare plugin for localization, I can help with translation to Russian language :).

Difficult for a casual user

Perfectly Integrates latest font awesome icons with your wordpress site as well as adds an Icon insert button in Tiny MCE wordpress editor.

Rundiz Font Awesome vs Perfect Font Awesome Integration