Title: Note for HTTPS sites using DNS prefetch
Last modified: June 19, 2017

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# Note for HTTPS sites using DNS prefetch

 *  Resolved [grantdb](https://wordpress.org/support/users/sixer/)
 * (@sixer)
 * [8 years, 11 months ago](https://wordpress.org/support/topic/note-for-https-sites-using-dns-prefetch/)
 * Just a quick heads up for those of you with HTTPS sites wanting to use the DNS
   prefetch option of this plugin.
 * Chrome browser by default does not do DNS prefetch on HTTPS sites, you need to
   add a header to turn it on if wanted.
 * [Chromium DNS prefetch](https://www.chromium.org/developers/design-documents/dns-prefetching)
 * > Chromium watches for an HTTP header of the form “X-DNS-Prefetch-Control” (case
   > insensitive) with a value of either “on” or “off.”
 * As well as FireFox browser also by default does not do prefetch on HTTPS.
    [Mozilla DNS prefetch](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control)
 * > Also, by default, prefetching of embedded link hostnames is not performed on
   > documents loaded over HTTPS. On Firefox, this can be changed by setting the
   > network.dns.disablePrefetchFromHTTPS preference to false.
 * Etc etc…
 * Cheers!
    -  This topic was modified 8 years, 11 months ago by [grantdb](https://wordpress.org/support/users/sixer/).
      Reason: context

Viewing 1 replies (of 1 total)

 *  Plugin Author [Sam Perrow](https://wordpress.org/support/users/samperrow/)
 * (@samperrow)
 * [8 years, 10 months ago](https://wordpress.org/support/topic/note-for-https-sites-using-dns-prefetch/#post-9299377)
 * Thanks for the info!

Viewing 1 replies (of 1 total)

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## Tags

 * [chrome](https://wordpress.org/support/topic-tag/chrome/)
 * [dns](https://wordpress.org/support/topic-tag/dns/)
 * [Firefox](https://wordpress.org/support/topic-tag/firefox/)
 * [prefetch](https://wordpress.org/support/topic-tag/prefetch/)

 * 1 reply
 * 2 participants
 * Last reply from: [Sam Perrow](https://wordpress.org/support/users/samperrow/)
 * Last activity: [8 years, 10 months ago](https://wordpress.org/support/topic/note-for-https-sites-using-dns-prefetch/#post-9299377)
 * Status: resolved