Evan Herman on "[Plugin: WordPress Icons - SVG] Icons not working in Firefox"

The one issue that I am seeing that MAY be causing the issue for you is the headers that are allowed to be sent via the .htaccess file.

Try opening your .htaccess file and adding the following the it:

<FilesMatch “.(ttf|otf|eot|woff)$”>
  <IfModule mod_headers.c>
    Header set Access-Control-Allow-Origin “*”
  </IfModule>
</FilesMatch>

This is my best guess as it seems to be working on your Hostgator server and not your Go Daddy server.

Another fix that I came across was removing the letters at the end of the url to pull in the icon font's. You can find that inside of /wp-content/uploads/wp-svg-icons/custom-pack/style.css?ver=3.9.1 and it's the first decleration at the to which looks like this:

@font-face {
	font-family: 'icomoon';
	src:url('http://surgeonseo.com/wp-content/uploads/wp-svg-icons/custom-pack/fonts/icomoon.eot?-fakoqm');
	src:url('http://surgeonseo.com/wp-content/uploads/wp-svg-icons/custom-pack/fonts/icomoon.eot?#iefix-fakoqm') format('embedded-opentype'),
		url('http://surgeonseo.com/wp-content/uploads/wp-svg-icons/custom-pack/fonts/icomoon.woff?-fakoqm') format('woff'),
		url('http://surgeonseo.com/wp-content/uploads/wp-svg-icons/custom-pack/fonts/icomoon.ttf?-fakoqm') format('truetype'),
		url('http://surgeonseo.com/wp-content/uploads/wp-svg-icons/custom-pack/fonts/icomoon.svg?-fakoqm#icomoon') format('svg');
	font-weight: normal;
	font-style: normal;
}

Try removing the ?-fakoqm at the end of the URL so it should just be:

@font-face {
	font-family: 'icomoon';
	src:url('http://surgeonseo.com/wp-content/uploads/wp-svg-icons/custom-pack/fonts/icomoon.eot?');
	src:url('http://surgeonseo.com/wp-content/uploads/wp-svg-icons/custom-pack/fonts/icomoon.eot?#iefix') format('embedded-opentype'),
		url('http://surgeonseo.com/wp-content/uploads/wp-svg-icons/custom-pack/fonts/icomoon.woff?') format('woff'),
		url('http://surgeonseo.com/wp-content/uploads/wp-svg-icons/custom-pack/fonts/icomoon.ttf?') format('truetype'),
		url('http://surgeonseo.com/wp-content/uploads/wp-svg-icons/custom-pack/fonts/icomoon.svg?#icomoon') format('svg');
	font-weight: normal;
	font-style: normal;
}

If that doesn't work just revert to how the URL was before changing it.

Let me know if either of those resolves the issue at all. I'll keep searching for fixes!

Evan