Alright, so Firing Line is a book that straddles between SR4 and SR5. It's bound to have some quirks. With that in mind, I'm looking through it now and the NPCs I see in Firing Line use pools rather than specific stats. So for those NPCs, you'd use the number given as the dice pool, which includes the attribute already.
For the core book, the NPCs in there do not give the dice pools. Rather, they give the specific skill ratings. For what it's worth, I think almost all the content you'll find in 5th Edition will use specific skill values rather than dice pools. Looking through some of the other 5th Edition books, I see the same trend toward using specific skill ratings. Shadow Spells does it, as does Street Grimoire and Run Faster. However, Coyotes uses dice pools rather than specific skill ratings.