If you leave the main GL window open in either Chrome or Firefox for an extended period of time, it continues to allocate memory. I'm not sure which component it is (could be AJAX calls too), but the GL window will often reach over 1 GB memory allocation in either browser after a number of hours. Although the solution is generally just to refresh/kill the window, I'm curious why it's happening. In Chrome killing the offending process kills all flash containing windows, so it could also be a leak related to the flash file that loads to enable music (JPlayer). This is with animation disabled and not having activated the music, and will occur with or without game activity during the period.