Share 'Firefox and IE'

I finally downloaded firefox, people have been after me for years, but couldn't send out a bunch of cards from Plaxo when I was changing companies. Now when I use outlook, if someone sends me a pdf and I try to open it, I can't open it from firefox. No I didn't make firefox my default browser. I toggle back and forth all day, because MLXchange and other real estate programs are written for IE.…