"Now this really isn't a knock against Firefox. The
extensions system is a dream come true. However, in it's current
form it's also a timebomb waiting to happen. All you need is one
creative virus maker, or malicious corporation, and boom! Firefox
ceases to be the secure juggernaut it is and becomes the prostitute
of whomever wants to take it over.
"As Microsoft's .Net extension proves, it's not that hard to use
the extensions system to take Firefox and turn it into the same
kind of virus magnet that Internet Explorer is, only much worse.
Now I'm not saying we need to abandon Firefox, but rather that two
key things need to happen."