From mozilla webpage: Mozilla has learned that a fraudulent SSL certificate for websites belonging to Google has been issued by DigiNotar. This is not a Firefox-specific issue and the certificate has now been canceled which should protect most people. Mozilla has released an update to Firefox to further protect you. Please update as soon as possible by following the steps in the Updating Firefox article.

I have uploaded and installed Firefox 6.0.2. There seems to be no more updates for Firefox. Therefore I would like to know why the DigiNotar root certificates are still in the list of trusted certificates.