How to open Fontello Icons in new tab or window?
The short answer would be to add a target="_blank" parameter into your anchor tag. Something like:

&lt;a href="example.com/url" target="_blank"&gt;&amp;fontello_icon_here;&lt;/a&gt;


The long answer depends on your context. I hope this helps! If it doesn't please update your question with specifics of what you're trying to accomplish.