Other search engines would. It already happened that Yahoo paid to be the default search engine in Firefox, for certain regions of the world (Yahoo was for the

Other search engines would. It already happened that Yahoo paid to be the default search engine in Firefox, for certain regions of the world (Yahoo was for the US, they also had deals with Yandex and Baidu). And Google would probably still want to have its search engine available out of the box to millions of users, even through an other browser.