Applications hidden addons

Like all good conversations, this was brought up in IRC. http://www.theregister.co.uk/2010/06/11/microsoft_slips_firtefox_add_on_into_software_update/ Microsoft decided it would be a good idea to install a hidden addon to firefox installs for those who have some services installed.  The major point being it is a hidden unknown addon that you can not remove yourself.  How friendly is that? Google’s …