If you are trying to provide OpenSearch to your users, you must include an OpenSearch Description Document (OSDD) in your site's header:
Most modern browsers will detect if a website supports OpenSearch automatically. : If you are trying to provide OpenSearch to
To install as a search engine in your browser (прегледач), you can either use its autodiscovery feature while visiting a website or manually add it to your browser's search settings. Adding OpenSearch via Autodiscovery : Open Settings > Search
In the URL field, enter the site’s search URL, replacing the search query with %s . : Open Settings > Search . Mozilla Firefox : Navigate to the website
Go to > Search engine > Manage search engines and site search .
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.