After you have logged out, many websites then redirect you to the sign in page.

PoppeyCat said

Well, trying to find out presented me with the forum sign in. It should be more plainly available. If you know it you don't need it, but if it is needed it can't apparently be found.

Well, you signed-in here, so are you talking in general, anywhere to sign-in? In any site you sign-in on, you have FF with a pop-up asking if you want the ID/Password remembered. If yes, as long as the 'Cookie' is not deleted from your computer, the 'Saved' sign-ins you've done are remembered for these sites.

"It should be more plainly available."

For this Forum?

~Pj