黄聪：GeckoWebBrowser多cookie

string profileDir = "UniqueIdentifier";
string directory = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), Path.Combine("Geckofx", profileDir));
if (!Directory.Exists(directory))
    Directory.CreateDirectory(directory);
Gecko.Xpcom.ProfileDirectory = directory;