Can you make a non-cryptographically secure random number generator secure?

This is more of a fundamental question, but the context is specifically in terms of JavaScript. Given that Math.random is not cryptographically secure, can the results still be considered secure when it has been called a certain number of times that cannot be predicted?

So if I was to generate a 32bit number using window.crypto.getRandomValues for example and select one of the digits as an iteration count – calling Math.random that number of times and using the last result, is the result still predictable?

The purpose of this is to generate a set of secure random numbers between 0 and 1 (exclusive) without having the ability to manually seed Math.random.

My initial thoughts are that the result shouldn't be predictable – but I want to make sure I'm not overlooking something crucial.