I'm pretty sure you are disregarding the technical improvements that Firefox and Chrome made over IE, and the marketing prowess of Google putting the Chrome ins

I'm pretty sure you are disregarding the technical improvements that Firefox and Chrome made over IE, and the marketing prowess of Google putting the Chrome installer on their search page. Other browsers were perfectly legitimate to build and install before the antitrust case... Safari is a weird thing to bring up as its primary use case is outside the domain of IE.