Android has a smartphone operating system market share of around 70 percent in Russia. Get Data Sheet, Fortune's technology newsletter. Yandex has long been challenging Google's market dominance in the mobile arena, and is a main beneficiary of the Russian antitrust authority's crackdown on the U.S. firm. The Federal Anti-Monopoly Service (FAS) ordered Google to allow Android phone manufacturers to preinstall rival companies' core apps – such as those for mapping or email – and to let them make other search engines the default. "In line with the agreement with Yandex and the settlement with FAS, we have instituted a new opportunity for search providers to promote their search services within the Chrome app on Android devices," Google spokesperson Meghan Casserly said. It has always been possible for users to change their search engine by diving into menus, but few people change default settings.