[oh_boy]

IE is mostly used here because it works best with the screenreaders, not because it's preinstalled or other common reasons. When I test with IE, and then with Firefox, I notice subtle things with big impact working better in IE e.g. I found that screenreaders are particular better with multilingual content on IE. I can't recall the exact screenreader/browser combo, but on IE, I got proper support for different voices for different languages when an element other than the HTML element had a lang attribute.