June 1, 2009
"A routine security update for a Microsoft Windows component installed on tens of millions of computers has quietly installed an extra add-on for an untold number of users surfing the Web with Mozilla’s Firefox Web browser."

From Microsoft Update Quietly Installs Firefox Extension.

As the Washington Post article says, this may introduce vulnerabilities into Firefox. Great for a security update that installs unwanted software without user permission, isn’t it?

I wonder why people keeps on relying on closed source, but with those update policies, I believe it’s a total nonsense.