content: Mozilla's main income is not secured, a possible Yahoo buyer could drop their deal https://techpinions.com/is-firefox-search-worth-375myear-to-a-yahoo-buyer/45144 http://www.itworld.com/article/3060108/internet/yahoos-firefox-deal-risks-dropping-into-the-red.html#tk.rss_all?utm_source=twitterfeed&utm_medium=twitter If  a possible Yahoo buyer would say no to the Mozilla deal, it would be a damn big hit towards their cash source.