That is in a zero electric field, if an electron moving, does it follow rectilinear propagation? Does it follow Newton's first law of motion?

That is in a zero electric field, if an electron moving, does it follow rectilinear propagation? Does it follow Newton's first law of motion?

I not asking about newtonian mechanics. I am asking considering HUP and QM, if I shoot an electron will it go straight? Is the velocity constant? This happens to be newtons 1 law. It was asked on behalf of all tiny quantum particles, especially electron.