Stop Browsers Prefetching DNS for Links on Your Pages
Sends the X-DNS-Prefetch-Control header to tell browsers not to look up the domains of every link on your pages in advance, so visitors' DNS providers do not learn which sites you link to before they click.
Opens WPIDE on
Code
add_action( 'send_headers', function () {
if ( ! headers_sent() ) {
header( 'X-DNS-Prefetch-Control: off' );
}
} );Notes
Explicit dns-prefetch and preconnect hints in your pages still work.
How to add this snippet
- Install WPIDE on your WordPress site (it is free) and open Code Snippets.
- Use snippet above adds it from the library in one click. Or copy the code into a new snippet with the same code type.
- It is added inactive: review the code and settings, then switch it on.