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by saetaes 5104 days ago
One thing that's interesting is that the Navigation Timing API available in modern browsers varies from being wildly incorrect to accurate, depending on the browser. In a quick test on my Mac, Firefox 13 showed an incorrect result (basically, the same issue as WPT and Gomez - almost immediate TTFB), while Chrome 20 correctly detected the 10s TTFB.
1 comments

One more data point: On Windows, both IE 9 and Chrome 20 measure TTFB correctly via NavTiming, while Firefox does not.