The browser war seems to be simmering down a bit, with Mozilla signing an agreement on Tuesday that keeps rival Google, which controls a quarter of the browser market, as the default search engine in the Firefox browser for at least another three years.

We're pleased to announce that we have negotiated a significant and mutually beneficial revenue agreement with Google, Mozilla announced in a company blog.

The financial terms of the deal were not disclosed with Mozilla saying, We're not at liberty to disclose them.

It's been a momentous year for Mozilla's Firefox, which was the world's popular browser a few years back. Though overshadowed by Google in November, Mozilla continues to seek improvements through rapid releases of the updated version this year. So far, the software developer released six new Firefox versions in 2011, beginning with Firefox 4 in the first quarter and ending with Firefox 9 this month.

November's StatCounter reports indicated Chrome secured 25.7 percent of the worldwide market compared with Firefox's 25.23 percent for the month. Mozilla's earning reports revealed Google raking in 84 percent of Mozilla's revenues as of 2010. And with the latest version of Chrome appearing to overtake Firefox on a weekly basis the same month, it makes sense for Mozilla to extend its agreement with Google to increase potential revenues as well as speed up Web applications.

The browsers' previous three-year contract ended in November with no word from either company on the terms of a renewal. At any rate an agreement has been reached, for no less than three years of partnership.

Mozilla has been a valuable partner to Google over the years and we look forward to continuing this great partnership in the years to come, said Alan Eustace, google's senior vice President of search.