the tab has the actual chord used tucked away at the bottom somewhere.

The F (major) Chord is played as a barre at the first fret- in the "open" position- thus:

e-1
b-1
g-1
d-2
a-3
E-3

E being the low e string. Think of it as an e (major) chord "slid up one" :)

This is because this positions give the lowest notes for an F on a fretboard.

The other (easy) position for an F maj is the same chord at fret 13 - octave higher.