"Over the past few months, we have listened to feedback, talked with our localizers, studied the trends of our Firefox Yandex builds, and reviewed the Yandex user experience. All this activity led us to the conclusion that our Russian users really wanted direct access to the Yandex search services in official Firefox RU builds," Anderson said.
Yeah, that was a bit of my thinking as well. I just noticed that the Google Pack software now features Chrome first and selected by default while FF is still offered it is no longer selected by default.
Perhaps we'll see this happen more in areas like Korea, China and Japan where Google is not the market leader either.