Before installing chrome, I used Firefox and sometimes there where some things really slow like showing and closing the realm map, or showing combat action (It's not because of the internet connection, cause I have a fast one).
I've used the user agent switch on google chrome to try playing MD in chrome, and I should say that what I tested, chrome is way faster than firefox... those things I said that where slow in firefox, in chrome are really faster...
I think MD should be fully tested in chrome and if it's all ok, then maybe take the restriction of MD to work in chrome.