I had a problem recently not being able to set Google as default search engine in Firefox of my Linux Mint installation. It is not that I like Google that much, it is actually opposite, but DuckDuckGo as default search engine doesn't give me the satisfying search so it seems it is not possible to skip Google tracking and keep your privacy, at least not at this moment.

If you had such problem, this is because Google search engine doesn't fund Linux Mint and this is why they are not on the list. In order to turn it on, check this out.