Both of you can Save Favorites and Usernames Passwords. Bookmarks (Favorites) don't need Username Password authentication. Username Password authentication is required only for User Accounts on websites.

go to Tools Menu -> Options -> Security -> place Checkmark on "Remember Passwords for Sites" -> click OK

Example: Both of you want to have User Accounts on Firefox Support Homepage https://support.mozilla.com/en-US/home

> You enter your Username and Password, Firefox will ask if you want to Remember Password, you click Yes and then you Sign-in. You do some surfing on this forum and then you Sign-out.

> Your husband loads Firefox Support Homepage site and sees that Your Username appears when he clicks in the Username field to type his Username. He Clears (use Backspaces) your Username and starts to type his own Username and then Firefox Auto-fills his Username and the Password also appears. Now he Signs-in. He surfs the forum and then he Signs-out.

That's how you will have to keep Signing-in when both of you will have separate User Accounts on a same Website.

Hopefully you understood the argument. Check and tell if it works.

You can create a new profile for yourself with the Profile Manager

• http://kb.mozillazine.org/Profile_Manager

• http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows
• http://kb.mozillazine.org/Shortcut_to_a_specific_profile
• http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox