FontAwesome 5 Supported

Bootstrap Blog was built-in with latest FontAwesome (5.0.13) which includes a lot of more icons and tools to play with them. One of main changes is new prefixes grouping icons in Solid, Regular and Brands (Light is only for Pro). By default in this theme Solid is selected by default, so you need to add far or fab to use FontAwesome Regular and Brands respectively.

Sizing

<i class="fas fa-camera-retro fa-xs"></i>
<i class="fas fa-camera-retro fa-sm"></i>
<i class="fas fa-camera-retro fa-lg"></i>
<i class="fas fa-camera-retro fa-2x"></i>
<i class="fas fa-camera-retro fa-3x"></i>
<i class="fas fa-camera-retro fa-5x"></i>
<i class="fas fa-camera-retro fa-7x"></i>
<i class="fas fa-camera-retro fa-10x"></i>

Animated Icons

<div class="fa-3x">
  <i class="fas fa-spinner fa-spin"></i>
  <i class="fas fa-circle-notch fa-spin"></i>
  <i class="fas fa-sync fa-spin"></i>
  <i class="fas fa-cog fa-spin"></i>
  <i class="fas fa-spinner fa-pulse"></i>
</div>

Stacked Icons

<span class="fa-stack fa-2x">
  <i class="fas fa-square fa-stack-2x"></i>
  <i class="fab fa-twitter fa-stack-1x fa-inverse"></i>
</span>
<span class="fa-stack fa-2x">
  <i class="fas fa-circle fa-stack-2x"></i>
  <i class="fas fa-flag fa-stack-1x fa-inverse"></i>
</span>
<span class="fa-stack fa-2x">
  <i class="fas fa-square fa-stack-2x"></i>
  <i class="fas fa-terminal fa-stack-1x fa-inverse"></i>
</span>
<span class="fa-stack fa-2x">
  <i class="fas fa-camera fa-stack-1x"></i>
  <i class="fas fa-ban fa-stack-2x" style="color:Tomato"></i>
</span>

Take a look to the official usage.