We demonstrate how the application of Higgs field theory to spin ½ fermions in a manner analogous to its application to spin 0 scalars enables fermion masses to be constructed entirely from a self-energy arising from gauge fields and “revealed” in the Dirac Lagrangian in a fully renormalizable manner with no “bare” aspect. When the observed fermions are taken to be Higgs fields based on expansion about the vacuum, it is found that the Dirac Lagrangian naturally produces an “anomalous” aspect for their magnetic moments. This enables us to deduce the gauge fields which underlie the self-energies for the three charged leptons on an entirely empirical basis, and then use this data to predict the impact of a time-dependent magnetic field on the lepton g-factors. We predict that a time-dependent magnetic field impacts the g-factor of the heaver mu and especially tau leptons much more substantially than it does the g-factor of the electron, and quantify how this should be detectable well within experimental ranges. We also show how this construction of fermion masses out of gauge fields permits these masses to remain invariant at all renormalization scales, wherein the variability of a fermion mass under renormalization is entirely equivalent to, and may be fully absorbed by, a gauge transformation of the vector potentials from which the fermion self-energies arise. As a result, the infinite constants ordinarily used for renormalization become finite and equal to unity. Finally, the time and space dependencies of the electric and magnetic fields in Maxwell’s equations are revealed to be embedded into Dirac’s equation as a result of Heisenberg commutations. This develops multiple venues for further confirming Higgs Field Theory in the fermion sector, all of which appear to be new.