This is off course a legitimate question. I tried to really summarize it by saying: "loosing one level will cause the collapse of the others". The browser is f

This is off course a legitimate question. I tried to really summarize it by saying: "loosing one level will cause the collapse of the others". The browser is for the end user an important base because that is where they get directed to surf and target ad spending etc. By inserting functionality like a start page or search engine, the behavior is influenced a lot. You can also push own services and products directly. The current status of the browser is also that it can replace the OS. (See Google Chrome OS)