I would guess that this has to do with Mozilla taking Yahoo/Yandex/Baidu as the primary search engines in Firefox in relative countries[1]... But I'm no insider

I would guess that this has to do with Mozilla taking Yahoo/Yandex/Baidu as the primary search engines in Firefox in relative countries[1]... But I'm no insider so I can't tell you anything for certain. [1] https://blog.mozilla.org/blog/2014/11/19/promoting-choice-and-innovation-on-the-web/ https://blog.mozilla.org/blog/2014/11/19/promoting-choice-an...