
Firefox OpenSearch plugins
Browsers can learn how to search a website if the site tells them. This plugin adds that information to your WordPress site, in the form of an OpenSearch description document.
Once activated, visitors can add your site as a search engine in their browser, or the browser picks it up on its own. Typing a keyword and a search term into the address bar then searches your site instead of the web.
There is nothing to configure. Install it, activate it, done.
Tab and search your site. Chrome calls this “Tab to Search”./wp-json/opensearch/1.1/document/wp-json/opensearch/1.1/suggestions?s=…