Comment 1 for bug 1455207

There is currently no easy way to do that (i.e. no UI to add/remove search engines). There might be a UI for it in the future. In the meantime, XML files contains OpenSearch descriptions of search engines can be dropped in ~/.local/share/webbrowser-app/searchengines/, where they will be found by the browser’s settings UI. If two or more descriptions are found, the settings UI allows switching between the various available search engines.

Unfortunately we don’t ship any additional description by default, so this piece of UI is hidden until the user manually adds files. But this is being addressed by https://code.launchpad.net/~osomon/webbrowser-app/systemwide-search-engines/+merge/257830 which ships a number of default search engine descriptions, installed system-wide. This will hopefully land soon, and would then become part of OTA-4, planned for the end of the month.