Cassiopesa Search is referred to as browser hijacker, which is absolutely correct way of describing its actions. It changes the home page of your browser to start with cassiopessa.com. It may easily infect Mozilla Firefox, Google Chrome and possibly some other browsers. Often it is spread together with Chromium open source installer, which in its turn is regularly bundled with many free programs. And when Chromium browser gets installed it will be set automatically as a default one using cassiopessa.com as a startup page.