Fridman's invariant, squeezing functions, and exhausting domains

We show that if a bounded domain $\mathrm{\Omega }$ is exhausted by a bounded strictly pseudoconvex domain $D$ with $C^2$ boundary, then $\mathrm{\Omega }$ is holomorphically equivalent to $D$ or the unit ball, and show that a bounded domain has to be holomorphically equivalent to the unit ball if its Fridman’s invariant has certain growth condition near the boundary.