If you want to make an Exception, here's how you can do it:

-> IF your Username & Password is already stored by Firefox, you need to Delete it

• Deleting Passwords

-> IF your Username & Password is not currently stored by Firefox yet, when you Login to the website it will ask if you want Firefox to Remember them

• Remember Password prompt will appear (screenshot attached)
• click the drop-down Remember Password button and click Never Remember Password for This Site

Check and tell if its working.

-> IF you use Clear Recent History feature, DO NOT select Cookies, Forms and Search History, Active Logins, Site Preferences

• Clear Recent History items

-> IF you use Privacy Cleanup softwares like CCleaner, DON'T SELECT FIREFOX IN ITS SETTINGS.

• These softwares can be responsible for Deleting your Firefox Settings.

Thanks, mha007. This installation of Firefox 9.0.1 is new and I was surprised to notice that it has never once asked me if I'd like to remember a password. It's set in preferences to do so and, although I thought it was odd that I'm never prompted by Firefox to remember, I just figured that perhaps this is a new thing in Firefox; that if you have it checked in preferences, it no longer asks. But I see that there are no saved passwords collected, now that I check.

Perhaps it's unique to the Mac version of Firefox but in preferences, I have an Exception clink next to the option to save passwords (Firefox---> Preferences--->Security----> Passwords. What I do not see, now that I'm looking, is any place at all to set preferences for Cookies. Hmmm... I can't set cookie preferences, so I suppose it's no wonder passwords aren't saved.  :o/

This is a bit dodgy for me to sort through on the fly (I'm currently being rushed) but thanks for your reply and I'll glean through all you suggest.

-> click Firefox button and click Preferences

• Security panel -> place Checkmark on Remember passwords for sites -> click Exceptions... button and click Remove All button -> click Close
• Privacy panel -> History section -> under Firefox will: select "Use Custom Settings for History"
  • Remove Checkmarks from:
    1. Always use Private Browsing mode
    2. Clear History when Firefox Closes
  • place Checkmarks on:
    1. Remember my Browsing History
    2. Remember Download History
    3. Remember Search and Form History
    4. Accept Cookies from sites -> click Exceptions button and click Remove button for all entries which have Status set to other than Allow -> Now type addresses of websites whose Cookies you want to be stored by Firefox e.g. mail.live.com , login.live.com , hotmail.com , msn.com , mail.yahoo.com , login.yahoo.com , yahoo.com , mail.google.com , google.com , etc. & click Allow button for each of these websites (One by One)
    5. Accept Third-party Cookies -> under Keep Until : select They Expire -> click Close
• Click OK on Preferences window -> Restart Firefox

Check and tell if its working.

Thanks, so much. It was a bit of a maze, but I've found my way out. I appreciate your help.