If he has millions of players playing this game, he will be just fine.
I think the browser change is an appropriate suggestion. I use Chrome with little issues. I have not experienced any disconnects in many many many days now, nor other issues plaguing my games. Then again, I have a good computer. And likewise, you do know IE is also called Internet Exploder. This is not because the browser crashes playing Lopdo's game... it is because the browser sucks, and has for years.