Just an observation about browser support. Currently, the highest version of Firefox (well, rebranded Iceweasel) available on the Debian repositories is 10, and so there is currently no way to use Roll20 out of the box on a Debian system. One can of course install Chrome or install Firefox directly.
I switched Iceweasel 10's user agent to the one for Firefox 11, and the editor appears to be working fine. I've tested out maps, tokens, creating a card deck, adding and deleting handouts, and using the jukebox. So at least a cursory test says that version 10 of the browser can work.
