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How reliable is the JavaScript property 'navigator.platform' and under what circumstances might it return a wrong operating system?

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    theres some tests made here http://stackoverflow.com/questions/1741933/detect-64-bit-or-32-bit-windows-from-user-agent-or-javascript you probably should tap into the user agent for more reliable results about the operating system. – mfreitas Nov 20 '12 at 23:02
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    Unless your code is privileged (chrome or at least has the UniversalBrowserRead privilege), it may get the value of the general.platform.override preference instead of the true platform. – Sully Nov 21 '12 at 16:23

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