Thanks for this post Silenia. Normally I would agree with stormkeep, that the typical user is ignorant and would be at fault for installing this, but even I fell victim to it. Nothing other than AV software auto-updates on my rig. Everything else it set to notify, with manual download and installs.
When I install an update to .NET, I do not expect it to interface with another companies addon and inject extensions without my knowledge. No, I didn't read the patch notes for the .NET update, but really, I shouldn't have to read MS's notes to see what Mozilla software they are fiddling with. You'd like to think that after countless class-action lawsuits that MS would get a clue.