FWIW, I have always checked the "forever" box. When I want to log in ("Clock in", since I'm a moderator, but that seems to make no difference), I type an "s" in the box and the rest of my name and the password (shown as dots) yumps into the spaces and I'm in and cookin'. If I want to go to SSW, I don't log out here, just click on SSW in "favorites". Same happens at SSW, OBTW, just type in an "s".
And every time I shut off the computer (almost every day), the history, cookies, temporary files and all that gets deleted (I use CCleaner and have all the boxes checked off down to and including "Windows Log Files"). That reminds me, I'm out of chocolate chip cookies and Cokes down in the shop, so I'd better head to the supermarket and get some. Num!

Steve