Its beta but still for anyone still having problems:
My "javascript causes screen to go blank’ woes were thankfully solved in 1.0.3 
Hi mate,title has been changed from “Mozilla Firefox 1.0.4” to “Mozilla Firefox 1.0.4 Beta”
Just for your info,this is a nightly build & not confirmed as a beta yet,even if the installer has 1.0.4 .exe on it.