Firefox doesn't allow cross-domain fonts
If you will open the TPro Admin Template directly i.e(file:///C:/Users/abc/TPro-admin) without local host or link url, you will find broken font-icons. It is due to browser doesn't allow cross-domain fonts.
Open the TPro Admin Template html files from the localhost i.e (http://localhost/TPro-admin/) or link url (http://example.com/TPro-admin/), it will work fine.