CSS: Add Icon to Links
You can add a little icon to links to indicate what type of link it is.
For example, suppose you have links to Twitter like this:
<a href="https://x.com/xah_lee">Xah Lee</a>
And you want browser to show a icon, like this

Instead of using a img tag for each link, you should use CSS to add them, by matching the URL.
Code
a[href*="x.com/"] { background: url("i/x.com_favicon.ico") no-repeat left center; padding-left: 38px; }