Building firefox with PGO is actually quite simple. Just add "mk_add_options PROFILE_GEN_SCRIPT='$(PYTHON) $(MOZ_OBJDIR)/_profile/pgo/profileserver.py'" to mozconfig (profileserver.py is a script that runs the app) and run make with the "profiledbuild" target instead of "build".
Building firefox with PGO is actually quite simple. Just add "mk_add_options PROFILE_ GEN_SCRIPT= '$(PYTHON) $(MOZ_OBJDIR) /_profile/ pgo/profileserv er.py'" to mozconfig (profileserver.py is a script that runs the app) and run make with the "profiledbuild" target instead of "build".
Please enable this in Jaunty!