You can manage your existing search engines at
If the search engine of your choice is not listed, click “Find more search engines” on the bottom.
Right-click the omnibox and select “Edit search engines…” — it will open in a new tab.
Then use the search box in the top right to search for the search engine of your choice. It should be listed if you’ve visited the search engine’s homepage at least once. Click on the three (3) dots next to it and then select “Make default”.
If you didn’t find the search engine, you can also click “ADD” to manually add the search engine.
%sis used to identify the query — for example, if the URL is
https://example.com/?q=%sand you search
puppiesyou will visit