Microsoft has acknowledged that they slipped the .NET Framework Assistant plugin into Firefox via Windows Update this past February, and that it has poked a “critical” hole in the browser’s security (effectively bringing Firefox down to IE’s level).
Microsoft has deemed the hole to be a “critical” security threat, as it gives webmasters the ability to quietly install software on your PC. Last May, Microsoft released an update that made it possible to uninstall the .NET framework. They also released a patch earlier this week that supposedly fixes the problem. The vulnerability can also be exploited on users running any version of Internet Explorer. Needless to say, Firefox and IE users should employ one of those solutions ASAP. [Computer World Image via rootshell.be]
The answer of Firefox was faster see Bellow :