I'm trying to make my first plugin and I have a problem with firebug. When I use firebug console in WP Admin Panel doesn´t work correctly. For example when I use the selector $('#wpbody') the console return null value. The WP panel include jQuery library and I don´t know why firebug works wrong.
Any advice or sugestion?
Tested with WP 3.1.3 and 3.2.1