You posted this is the desktop Firefox section (on Windows, Linux, macOS) and you used Firefox on iPhone to post this thread. Mozilla Firefox on Firefox for short is a web browser. It comes with a number of default search engines with Google being the default in most language locales. To change search engines in desktop Firefox web browser see https://support.mozilla.org/en-US/kb/change-your-default-search-settings-firefox To change the search engine in Firefox on iPhone/iPad (iOS/iPadOS) then see https://support.mozilla.org/en-US/kb/change-your-default-search-engine-firefox-ios