Why can't I download Firefox?

[Mean Jean]

A couple of nights ago I was doing ? something and Google came on and was telling me things about myself that I didn't remember so now I want to get rid of google and get Firefox but I can't download it, There are a couple of games I like on facebook but I can't play them on I.E. so I played them on google but now I feel like I've been violated google knows so much about me so I want to delete google and use Firefox as my second browser. Can you help me out with this problem. Thank you.