Okay... Let me take you through:
1. I have deleted all cookies; all passwords remembering setting closed and restarted Firefox.
2. I open FF and go to the protected page.
3. I am asked for the password, I enter it.
4. The browser asks "Remember this password?" I click NEVER for this site.
5. I access the protected page.
6. I close the tab, close the FF browser which asks me to clear the private data, which I do but NOT the cookies (Why should I?)
7. I reopen FF, go to the protected page and can open it without being asked for the password!
The problem is in point 6:
a) I have set up my browser to ask me every time I close if I want to clear the private data. Not everybody does that.
b) Why should I have to delete cookies when I close? The WP cookie should be automatically deleted when I close the session.
If I choose to delete cookies when I exit FF at stage 6, then the password is deleted and I have to input it again the next time. But as I said, I do not control what my users do...
Thx