Free will is really an ill-defined concept, and depending on the frame from which you view this question, it has multiple answers.

It might help to better define what you believe "free will" is.

I find it impossible, when considering existence as the period extending from the beginning of time until the end of time, to imagine that things can be changed. Everything that happens within that frame, can't have happened any other way than the way in which it did. Which would subsume that free will is an illusion.

However, as we don't have the ability to experience existence in this way (we experience a temporal cause and effect) I can also see how it is highly counterintuitive to come to any other conclusion than that we have free will and our "choices" directly impact our circumstances.

That said, there is an argument that it's both: that our circumstances are so pre-defined and limited that the choices we are presented with are hardly choices at all, but the necessary products of a procedure of circumstances almost entirely out of our control, for example the place of our birth, ur skin colour, our family circumstances, our upbringing, our instilled values, the planet on which we live, the physical abilities or disabilities which limit us -- within which we simply choose from a binary set of predetermined outcomes.

I must say, personally, I tend to find the concept of free will a bit silly. Every "choice" is merely another step forward into a future which is entirely impossible to foresee. There is an illusion of control and a feeling of comfort in believing we are arbiters of our own futures which makes free will a very attractive concept, but like many human ideas it probably is far more about needing a sense of control than it is about providing any objective observation of the universe.