Bernhard Kau

Kau-Boy’s OpenSearch is deprecated and will be removed from the plugin directory on July 29, 2023, 13 years after its first release. If you still want to use OpenSearch on your site, I recommend switching to <a href="https://de.wordpress.org/plugins/open-search-document/" rel="nofollow ugc">Open Search Document</a> which is still actively supported.
Integrates an OpenSearchDescription so that users can add your blog as a search location to their browsers. Your favicon will also be visible next to the search option in the browser.
You don’t need to setup any information. Just install and activate the plugin!

Kau-Boy's Opensearch

Integrates an OpenSearchDescription so that users can add your blog as a search location to their browsers. Your favicon will also be visible next to  …

gfazioli

Add WordPress standard search address into the browser menu, follow OpenSearch.org standard. 
The OpenSearch standard is supported by all browsers, in different way…
<h3>Translations</h3>
Unnecessary

Add Browser Search

Add Wordpress standard search address into the browser menu, follow OpenSearch.org standard.

Kau-Boy's Opensearch vs Add Browser Search