I try using the "search in private window" feature from Firefox, but that doesn't always seem too private either. I mean, I really don't have anything to hide, but that's not the point. It's my business what I'm looking at. I also share my computer with my kids. I hate when I've been searching for a gift, and then they use my computer, and know what I want to buy for them. It's annoying.
I just don't like the feeling of having every move I make watched, tracked, and analyzed. It does not create a "better user experience" as claimed.