Firefox is a web browser while Google in this case is a search engine. Mozilla the makers of the Firefox web browsers does not have a search engine of their own. A search engine for example is duckduckgo.com, google.com, bing.com You change to one of the other default search engines Firefox some with or install and use others. https://support.mozilla.org/en-US/kb/add-or-remove-search-engine-firefox https://support.mozilla.org/en-US/kb/change-your-default-search-settings-firefox And since you posted this thread with Firefox for Android in the Firefox section, here is the related KB article for Firefox on Android https://support.mozilla.org/en-US/kb/manage-my-default-search-engines-firefox-android