Icons not displaying in FireFox or Chrome

I am in the process of building a new website and am almost complete. While I was working on it I used icon for various counter and charts.

All of a sudden the default icon Font: entypo-fontello is not displaying correctly in Firefox or in Chrome on the mac. It was working fine last week. It shows fine on Safari. I have emptied my browser caches and restarted with no change.

What can I do? Also, can I change the icon font in the CSS to use the FontAwesome sets? How?

I need to go live with this website next week so hope you can tell me how to fix.

THANKS!