If you are trying to provide OpenSearch to your users, you must include an OpenSearch Description Document (OSDD) in your site's header:
The site should appear under "Inactive shortcuts" or "Recent"; click to add it. Mozilla Firefox : Navigate to the website. Click the Address Bar or the three dots in the address bar. If you are trying to provide OpenSearch to
Go to > Search engine > Manage search engines and site search . If you are trying to provide OpenSearch to