Firefox, the world’s second largest Web browser will stop using Google as its default search engine in Russia and instead use Google’s rival and Russia’s leading search engine, Yandex.

Mozilla, the parent organization behind Firefox said that it concluded that Yandex was the better choice, according to a blog post by Mozilla General Counsel Harvey Anderson.

“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.”

“As a result, we’re planning on setting Yandex as the default search provider for the Firefox 3.1 Russian locale builds,” Anderson said.

There has been a falling out between Google and Mozilla ever since the release of the Google’s Chrome browser which competes with Firefox. In fact the Mozilla officials learned of the Chrome via the media like everybody else.

Mozilla gets the vast majority of its revenue from its partnership with Google, Mozilla is compensated for each download of Firefox and revenue from search ads. In 2007, $66 million of Mozilla’s $75 million total revenue resulted from that partnership.

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