I've also found that by using Google Chrome (which you
put me onto!), it can save your password for you. That's a good option if your computer is not shared.
As for why it's not functioning as expected, we'll look into that too if your investigations into your cookie settings come to nothing.
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"Whether I were to preach in brief, Sāriputta, or whether I were to preach in detail, Sāriputta, or whether I were to preach both in brief or in detail, Sāriputta, rare are those who understand." (A I 333, Sāriputtasutta)