Google isn't giving money to Mozilla just because they're nice and they like Firefox. Google often makes money when someone uses Firefox's search box to do a Go

Google isn't giving money to Mozilla just because they're nice and they like Firefox. Google often makes money when someone uses Firefox's search box to do a Google search: the search results page may have ads and if the searcher clicks on one of those ads, Google makes money, which they share with the referrer. The referrer in this case is Firefox but Google has a similar arrangement with tons of other referrers (through their "AdSense for Search" program). I suspect Google's deal with Mozilla hasn't been renewed simply because renewal time hasn't arrived yet.