Mozilla announced a change to their strategy for Firefox search partnerships. They are ending the practice of having a single global default search provider. Instead, the default search provider would be determined by location in the following ways:
Google - together with Bing, DuckDuckGo, and other (depending on location) will continue to be a pre-installed search option. While not a default search provider, Google is not fully out - they will continue to power the Safe Browsing and Geolocation features of Firefox.
(Score: 3, Informative) by doublerot13 on Saturday November 22 2014, @04:46PM
Google maintains a malicious website list that firefox uses[Safe Browsing] and firefox also sends your public IP to Google for it to return a location/region for that IP.
Google is involved because they provide these 'services' for free to Mozilla.