Comment by zobzu

actually we wrote this many years ago and left mozilla ans nobody is really updating it other than adding new configs. its not super useful anymore :)

at the time it made sense to us because you couldnt have good SSL configuration everywhere (it was not well supported) so we had trade-offs and created tiers of configs. We barely had TLS coming out, so SSL eas still the name of the game.

nowaday just use the latest TLS defaults and you're golden.