Mozilla Firefox’s block list has added both the .NET Framework Assistant and the Windows Presentation Foundation with the reason being given that there is a remote code execution vulnerability. This is normal and should be universal to all Windows/Firefox users.
According to the bug report, the problem lies in the Windows operating system and is available to be patched manually. A formal Windows Update through the Windows Update program is expected to follow. The bug was discovered three days ago and as such it is not expected to be fixed anytime soon. There is no way to re-enable either add-on at this time, despite the fact that the problem was in the OS and not the plug-in.
