How is Firefox crashing an Apple issue, assuming you don't hit the same problems with Chrome?
I was probably unclear: The whole computer freezes, and there is nothing I can do except a "hard" reset, i.e. pressing the power button until it shuts off.
But there are more issues still, e.g. that the computer will only connect to my bluetooth radio after a restart.
So yes, for me Apple's software quality truly has declined sind Snow Leopard.