I belong to an organization which has a public website. The website also has a members-only area that requires entering a username and password to access. When I first go to the public website and then click on the link to the members-only area, it brings up a dialog that says: Authentication required and which has blanks to enter the username and password. These blanks are already filled in with a username and password. Unfortunately, these are from last year. The username and password have both been changed for the new membership year. I can get into the members-only area by typing the new username and password over the old entries, but Firefox won't remember them. Next time I log in, it will give me last year's obsolete ones all over again. How to I get it to un-remember them and remember the new ones?