rem: var features = "chrome,titlebar,centerscreen" + (instantApply ? "" : ",modal"); 
add: var features = "chrome,titlebar,toolbar,centerscreen" + (instantApply ? ",dialog=no" : ",modal"); 
context: function openPreferences(){  var instantApply = gPrefService.getBoolPref("browser.preferences.instantApply");  var features = "chrome,titlebar,centerscreen" + (instantApply ? "" : ",modal");  var wm = Components.classes["@mozilla.org/appshell/window-mediator;1"]                     .getService(Components.interfaces.nsIWindowMediator);  var win = wm.getMostRecentWindow("Browser:Preferences");  if (win)    win.focus();  else     openDialog("chrome://browser/content/preferences/preferences.xul",                "Preferences", features);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/f2497900cadc001cdf73c130b2382c4018de7164/browser.js/buggy/browser/base/content/browser.js