font awesome and firefox

.htaccess

# Apache config
<FilesMatch ".(eot|ttf|otf|woff)">
  Header set Access-Control-Allow-Origin "*"
</FilesMatch>

config.ru

# config.ru
# Allow font files to be loaded from anywhere (for loading webfonts in Firefox)
require 'rack/cors'
use Rack::Cors do
  allow do
    origins '*'
    resource '/fonts/*', :headers => :any, :methods => :get
  end
end

nginx.conf

# nginx config
if ($filename ~* ^.*?\.(eot)|(ttf)|(woff)$){
  add_header Access-Control-Allow-Origin *;
}