After former CIS versions bundling taskbars, Firefox probably got some money from bundling Mc Affee security scan.
When Firefox asks you to update to 3.6.4, it also has a check button for Mc Affee.
I usually never check such a button, but i got in trouble with the latest FF update, crashing me because the latest Adobe Flash Player was not installed, and refusing to do anything if i did not install Adobe update itself (this last event being also very stupid, as i never use whatever Flash Player).
I therefore suppose that, through this mess, Mc Affee automatically installed itself: now that we have it, let’s run it, and there, it becomes very funny: inspecting my “system security”, it reports me that Comodo is installed and ensuring my firewall security (but as far as i know, Mc Affee does not have any firewall), while it tells me that Antivir Desktop is desactivated (definitely not true), so i am “in danger” and automatically linking me to… Mc Affee download site, “needing Internet Explorer” (Did Firefox also get paid not only by Mc Affee and Adobe, but also by Microsoft???).
Next step is of course uninstalling this junk.
Very disgusting commercial practices, aren’t they?