Too many browsers!

Google Chrome, Safari, Mozilla Firefox and Internet Explorer -- which browser is best? The web page you're working on will look and work differently depending on which browser you are using. This is one situation where I think we have too many choices. Why can't one download of Media Player or Flash work for all the various browsers? I try to remember the KISS theory -- Keep It Simple... We're trapped behind the lines in a marketing war. Technology is supposed to improve our lives and simplify our tasks. We've got a long way to go!