Firefox users around the world will still be able to use alternate, built-in search options in the browserin the U.S., for example, Google, Bing, DuckDuckGo, eBay, Amazon, Twitter, and Wikipedia will continue to be supported, the company said.

In addition to Yahoo in the U.S., Mozilla is tapping Yandex Search for Russian Firefox users and is continuing to use Baidu in China. Mozilla has used Google as its default global search provider in Firefox for a decade, but is now opting for 'a more local and flexible approach to increase choice and innovation on the Web, with new and expanded search partnerships by country,' the company said. The financial terms of the deal were not disclosed. The partnership will bring Yahoo search to Mozilla's desktop and mobile Web browsers in the United States, beginning in December. Mozilla will make Yahoo the default search engine in the Firefox browser as part of a five-year deal, the two companies announced Wednesday.

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