cd7c41b5_ebug_Preferences___FirebugWiki__Description
[Option] alwaysOpenTraceConsole [Valid Values] true, false [Default] false [UI Equivalents] Firebug Menu->Options->Always Open Firebug Tracing [Description] 
Specifies whether the Trace Console should be automatically opened when Firefox is started
Firebug Preferences - FirebugWiki