Firefox security add-ons

What actually strikes me is that people seem to think that leaving security in the hands of users, and
making it their responsability is a good idea. Geek users will probably browse extensions, yeah, but
most users will depend on the browser's ability of defending itself.

I'm not saying the browser should be trying to shield users from any conceivable unsecure behavior
they may have, but basic stuff such as the ones covered by the addons mentioned should be basic
browser functionality (not options!).