I wonder why it shouldn't work on Firefox, the only bottleneck I can see is the canvas. (Websockets can be faked multiple ways.)
I've been using Chrome for the last 2 months, and today was told Firefox wasn't working with a wordpress blog I have to administer... since when does firefox have problems viewing things? I thought that was IE's job.
Tell me about it. At work I need to check Firefox too besides IE to see if the app works correctly. Chrome rarely has any problem.