Mozilla Firefox may no longer be the second-most popular web browser on the planet, but that hasn't stopped Google from making a new deal with Mozilla worth about $900 million. The deal was cut in order to make Google the default search engine in Firefox for the next three years.

The price tag Google, based in Mountain View, Calif., is paying to remain the default search engine on Firefox, owned by the Mozilla Founadtion, also based in Mountain View, Calif., is nearly three times as much as the previous deal made between the two companies. In 2010, 84 percent of Mozilla's $123 million revenue came from the Google search deal, according to ZDNet.

The deal comes a few months after Google Chrome became the second-most popular web browser. Chrome now has 25.7 percent of global web browser market share according Read Write Web. Of course, Google is also the default search engine in the company's own browser.