From online posts they say there is not option to encrypt cache on Firefox Mac. I am concerned that login sessions to email sites and even PASSWORD MANAGERS like LastPass can be obtained if your Mac is infected where someone could access the cache and BYPASS LOG-INS and get directly into account. This is troublesome even if I use YUBIKEY authentication, if someone obtained cache sessions they could bypass all security measures. I WOULD LOVE TO SEE A SECURITY FEATURE ADDED TO ENCRYPT THE CACHE.