How to change the search engine in Safari? To change the search engine in Safari was never so easy! As we know, Safari is limited when it comes to search engine and the options you have here are pretty limited. But, with the help of Custom Quest Safari extension, you can access other search engines as well. All you have to do is to define a new shortcut for your preferred search engine in Safari and then just type the shortcut followed by the searched terms in address bar.