Add additional URLs to preload

FlyingPress default fetches URLs from your sitemap file.

If you've URLs that are not in the sitemap but should be preloaded, you can use the filter " flyingpress_urls_to_preload" like below:

add_filter('flyingpress_urls_to_preload', function($urls){
   $urls[] = "https://example.com/your-page/";
   return $urls;
});