After full system reinstalling I have such problem:

The newest Firefox 10.0 can't launch embedded applets. Even Java Console doesn't appear.
BTW, several days ago it worked fine with JavaFX 2.1.10
When I load the same page with IE9 - it's ok, and such Java Console is shown:

Java Plug-in 10.4.1.255
Using JRE version 1.7.0_02-b13 Java HotSpot(TM) Client VM
User home directory = C:\Users\Ulyss
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------