Unless they're running ads for other companies without taking any money, they are indeed selling data: https://blog.mozilla.org/en/products/firefox/update-on-t

Unless they're running ads for other companies without taking any money, they are indeed selling data: https://blog.mozilla.org/en/products/firefox/update-on-terms-of-use/ https://blog.mozilla.org/en/products/firefox/update-on-terms... > In order to make Firefox commercially viable, there are a number of places where we collect and share some data with our partners, including our optional ads on New Tab and providing sponsored suggestions in the search bar. We set all of this out in our Privacy Notice.