According to this: https://code.google.com/p/chromium/issues/detail?id=45580 and http://trac.webkit.org/browser/trunk/Source/WebCore/page/Crypto.cpp Chrome implements cryptographically secure random values.

I know Opera also does that and they have Firefox running its own window.crypto.random method.

I guess you are right EmperorBob however it is not a practical approach though in my case.