Adding Css Font Awesome icon?

[youtuber]

How can I add a Home Button icon to css

https://youtubertr.blogspot.com

.top-nav .PageList li a:before {
font-family: FontAwesome;
content: "\f015";
margin-right: 5px;
font-size: 26px;
text-shadow: 1px 1px 1px #000;
}

I added it, but I guess I added it wrong