Faced a problem - using icons in CSS using pseudo-elements - instead of the icon itself, just a square appears. If you specify in HTML through the tag <i> , then everything works. I tried to connect links of different versions, at the moment there is the last one:
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.9/css/all.css" integrity="sha384-VY3F8aCQDLImi4L+tPX4XjtiJwXDwwyXNbkH7SHts0Jlo85t1R15MlXVBKLNx+dj" crossorigin="anonymous"> Here is an example of how I connected:
.breadcrumbs ul li a { position: relative; font-size: 15px; font-weight: normal; line-height: 6px; color: #454647; padding-right: 35px; } .breadcrumbs ul li a:before { position: absolute; font-family: FontAwesome; top: 0; right: 0; content: "\f30b"; }