jp2112

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.
<h3>If you need help with this plugin</h3>
If this plugin breaks your site or just flat out does not work, create a thread in the <a href="https://wordpress.org/support/plugin/dns-prefetch" rel="ugc">Support</a> 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 <a href="https://wordpress.org/support/view/plugin-reviews/dns-prefetch" rel="ugc">Reviews</a> section to report issues or request new features.

DNS Prefetch

Adds dns prefetching meta tags to your site.

Infragistics

Widget-fixer works by recalculating the string lengths of the widget strings and updating 
the relevant numbers in the database so that your widgets will load again.
Disclaimer 
This plugin is provided “as is.” It is free software licensed under the terms of the [GNU General Public License 2.0 (GPL)] (http://www.gnu.org/licenses/gpl.html “GNU General Public License 2.0”). It is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Infragistics is not liable for any damages or losses.

Widget Fixer

Widget-fixer fixes your widgets after you change to a new siteurl.

DNS Prefetch vs Widget Fixer