rem: for (var i in array) ShowHideToolbarButton(array[i]); 
add: for (var i in array) { var prefName = array[i]; var id = prefName.substr(kEditorToolbarPrefs.length) + "Button"; var button = document.getElementById(id); if (button) button.hidden = !gPrefs.getBoolPref(prefName); } ShowHideToolbarSeparators(document.getElementById("EditToolbar")); ShowHideToolbarSeparators(document.getElementById("FormatToolbar")); 
context: function ShowHideToolbarButtons(){  var array = GetPrefs().getChildList(kEditorToolbarPrefs, {});  for (var i in array)    ShowHideToolbarButton(array[i]);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/da09ae6a4294426c509a0a334cd288529bac1d83/editor.js/clean/editor/ui/composer/content/editor.js