When I hit update on my app on the simulator (either the 1.0 release, or from https://ftp.mozilla.org/pub/mozilla.org/labs/r2d2b2g/) it launches the simulator to the desktop but does not actually open the app. I have to browse to device and launch the app. My finger is getting tired :)
We recently landed a change that should fix this problem. Can you reproduce it on the latest preview release?
Latest preview release: Windows, Mac, and Linux.
Closing due to lack of needed info from reporter.