Core Apps » ChatSecure:Android

I am really confused about certain issues with this system. I support the great Ideas that our privite searches , chats blogs, or whatever we may want to do should be ourinformation only and no one should be able too track us or wherevor what we do. My Question is; when I'm looking through the info on tor and actually when I downloaded the search app it was an extension of or could have been the actual Google Search page, this is really confusing for me considering Google is one of the largest tracking systems out there? So if I'm using a search parameter from a tracking website how am I sure that I am invisible to them or any one else! How am I sure I'm not being tracked by them. or another site. Th