For every copy of Internet Explorer 8 downloaded from here, Microsoft donates $1.15 to Feeding America—but if you upgrade from IE6, they'll double their donation. Even if you switch to Firefox immediately, help give Microsoft's money away: [BrowserFortheBetter]
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I literally upgraded IE6 to IE8 a few days ago (though I've been using Firefox the whole time), but I didn't know about this. Sorry starving people!