7f5ad477_ebug_Preferences___FirebugWiki__UI_Equivalents
[Option] shadeBoxModel [Description] Specifies whether to show the box model while hovering an element inside the HTML Panel or just mark it with a frame [Valid Values] true, false [Default] true [UI Equivalents] 
HTML Panel Options Mini Menu->Shade Box Model
Firebug Preferences - FirebugWiki