Thanks for the link to the article regarding the master password. However, I don't see that Firefox 3 on my computer has that Options> Password and Master Password. Has anyone got an answer to it? I do see that I can 'clear private data', but it's a bit more cumbersome than the master password idea.
Here is a page that explains it:
http://tips4mac.blogspot.com/2008/07/master-password-in-firefox-not-in.html
pault