This plugin implements DNS prefetching per the Mozilla specification for the Firefox browser. Hopefully, other browsers will eventually support DNS prefetching.
See https://developer.mozilla.org/en-US/docs/Controlling_DNS_prefetching for more detail.
Disclaimer: This plugin is not affiliated with or endorsed by Mozilla.
If you need help with this plugin
If this plugin breaks your site or just flat out does not work, create a thread in the Support forum with a description of the issue. Make sure you are using the latest version of WordPress and the plugin before reporting issues, to be sure that the issue is with the current version and not with an older version where the issue may have already been fixed.
Please do not use the Reviews section to report issues or request new features.
Screenshots
Plugin settings page (note the URLs entered)
HTML source of a webpage (the URLs above are added to the HTML source)