Oh joy, Microsoft have managed to introduce security problems into Firefox through a plugin for it that they silently install without your knowledge! 🙁
Along with .NET Framework 3.5 SP1, Microsoft have been silently installing a Windows Presentation Foundation Plugin that allows the embedding of XAML applications (an XML-based UI technology) in web pages, called XBAP (XAML Web App). The exploit is drive-by, meaning that the victim only needs to be lured onto a web-page for the attack to be effective. The only safe thing to do until a patch is issued, is to open Firefoxâ€™s AddOn Manager and disable the WPF plugin.
Mozilla might already have reacted to this, my brother (who alerted me to the above story) said:
Firefox popped up saying it’s blocking 2 Microsoft add-ons so they must be cracking down on them
Dear Microsoft – please do not stuff about with peoples web browsers that don’t belong to you, you’re just not qualified..