Why is Firefox so unsafe?

Someone told me that the main reason they use Firefox is for security reasons. No one targets Firefox and they have the best security for a browser.

I started using Firefox for this reason. I soon forgot about that reason because I fell in love with its usability.

However, I'm quickly falling out of love with it because I have not had nearly the amount of security breaches with IE that I have had since I started using Firefox.

Today, I received a phone call to my cell phone from a time share company, that I saw the name of on a site earlier in the day.

That never happened to me before, and kinda freaked me out.

Last week I had to uninstall all adobe programs and all printers in order to recover my computer from a Firefox extension that was supposed to make opening adobe files easier.

So far, Firefox has been a pain in the ass. I still like that bookmark toolbar though, and the tabbed pages. I'm currently running ad-aware and spy-bot to see what I come up with. Then I guess I'll be running a Norton full scan too. I don't like the waste of time. Anyone with any ideas? Am I doing something wrong with Firefox?

I feel like I've taken the condom off of my computer.

AM Update: viruses and adware and spyware all over the place. I'm pretty close to switching back to the IE team.