yoink@tumblr ~ % fortune
"Of the big five, only two browsers currently use this protection on Windows; Internet Explorer (7 and 8), and Chrome. For this reason alone, I’d be hesitant to use Safari, Opera, or Firefox. Their security track record isn’t really any better than Microsoft’s, and the consequent exploitability of these browsers is much greater."
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Peter Bright, Arstechnica - On Mandatory Integrity Control enabled by Chrome and IE7/8/9 on Vista and Win7.
I wonder what the holdup is with WebKit and FF?