Mozilla Corp. has announced that Google is renewing its sponsorship of the default search window on Firefox browsers.

No financial terms were announced for the three-year deal, but it assumed that this will ease recent fears that nonprofit Mozilla wouldn’t have money to continue to update and support the free browser.

Google has provided almost all of the financing to support Mountain View-based Mozilla, reportedly amounting to 84 percent of its $123 million in revenue in 2010.

The previous sponsorship deal ended last month and prompted speculation about whether Google would continue to back Firefox.

Google’s own browser, Chrome, passed Firefox as the second most widely used browser last month with a 25.69 percent global market share, according to StatCounter. Firefox had 25.23 percent of the global market and No. 1 Microsoft had 40.63 percent.

Mozilla also partners with other search providers, including Microsoft, Yahoo, Yandex, Amazon.com and eBay.