rem:  window.open("chrome: 
add: var wm = Components.classes["@mozilla.org/appshell/window-mediator;1"] .getService(Components.interfaces.nsIWindowMediator); var win = wm.getMostRecentWindow("Browser:About"); if (win) win.focus(); else {   window.open("chrome: "centerscreen,chrome,resizable=no, minimizable=no"); } 
context: function openAboutDialog(){#ifdef XP_MACOSX  // XXXmano: define minimizable=no although it does nothing on OS X (see Bug 287162); remove this comment once Bug 287162 is fixed...  window.open("chrome://browser/content/aboutDialog.xul", "About", "centerscreen,chrome,resizable=no, minimizable=no");#else  window.openDialog("chrome://browser/content/aboutDialog.xul", "About", "modal,centerscreen,chrome,resizable=no");#endif}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/cb7f0701eb88af26d654533fd238e22be3968a45/utilityOverlay.js/buggy/browser/base/content/utilityOverlay.js