It shouldn't be happening as we are totally compatible with all Adobe products, assuming your are totally up to date with them and with your operating system and its software?
You may want to try online Technical Support Chat as they are best equipped to troubleshoot such things.
See their link under Useful Links at the top of this page.
What is your operating system and service pack and how much installed memory do you have also what is your motherboard's CPU capacity? (Intel. I3 at 2ghz..whatever)
I don't think this is anything to do with McAfee. The complaints about Flash causing Google to crash, especially when playing Cityville in Facebook, are all over Facebook and the Google forums. There are one or two suggested fixes in the threads below. See the following -