Local User Profile Passwords
Netscape Communicator 4.5 has built-in support for user profiles, which allow multiple users to share a single copy of Communicator. Your local profile contains information about your email, preferences, bookmarks, and security information, and stores those and other settings separately from those of others who may use this copy of Communicator. By default, your local Communicator profiles are accessible to anyone who obtains access to your machine. However, Communicator can be configured to request a password for a given profile before launching with that profile.
這裡有讓 Netscape Communicator 在啟動時詢問有關 password 的 link
http://wp.netscape.com/browsers/4/passwords/