Para ello simplemente tendremos que añadir estas líneas a nuestro archivo .htaccess
#especificar caché de navegador ExpiresActive On ExpiresDefault "access plus 10 days" ExpiresByType text/css "access plus 1 week" ExpiresByType text/plain "access plus 1 week" ExpiresByType image/gif "access plus 1 month" ExpiresByType image/png "access plus 1 month" ExpiresByType image/jpeg "access plus 1 month" ExpiresByType image/x-icon "access plus 3 months" ExpiresByType application/x-javascript "access plus 1 month" ExpiresByType application/javascript "access plus 1 week" ExpiresByType text/javascript "access plus 1 week" ExpiresByType application/x-icon "access plus 3 months" # FIN especificar caché de navegador