RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

<filesMatch ".(ico|pdf|flv|jpg|jpeg|png|gif|svg|js|css|swf|woff2)$">
  Header set Cache-Control "max-age=8380800, public"
</filesMatch>

AddType application/manifest+json .webmanifest