I can think of 5 different locations that I play AAT from; all with different Browsers.

Sun Graphic does not show up on some Computers (Browsers) and plantet Upgrades works differently on Different Computers as far as: interactions with top upgrade levels that manipulates total upgrades. None of this is a problem for game play, but I always have to think about which browser that I am playing from and on which Computer...

Also depends on the version you are playing. I think they work on all browsers under .30