"Update: Many are wondering why they see a “black” screen after launching the B2G Desktop build. It’s likely because you havent set up a Gaia profile prior to launching. here’s how you do it. (again, refer to Gaia/hacking for better steps!)"[0]<p>You need a full make environment to get anything running. While I understand that this is just a developer preview, this is really not a good way to get testers.<p>[0] <a href="http://dknite.wordpress.com/2012/07/18/desktop-builds-now-available-for-firefox-os/" rel="nofollow">http://dknite.wordpress.com/2012/07/18/desktop-builds-now-av...</a>