If you are using any custom font in your site and during your first visit that font not showing or working, then put this code in your .htaccess file. That will solve the font loading issue.
<FilesMatch "\.(ttf|otf|woff)$">
<IfModule mod_headers.c>
Header set Access-Control-Allow-Origin "*"
</IfModule>
</FilesMatch>
All About Basic 