Fortify
If you live outside the US you are forced to use the 40 bit version of Navigator or Communicator. Downloading and installing Fortify will give your 40 bit browser, 128 bit encryption strength.

Applying Communicator's Security Features
Discusses security features built into Netscape Communicator 4.0. Instructions on configuring Communicator to use all of its authentication, encryption, access-control, and content-protection capabilities. (Netscape)

Netscape Security Notes
Provide latest news concerning the security of Netscape clients, servers, and development software. (Netscape)

Security Preferences for Communicator
Describes security related preferences for Netscape Communicator and demonstrates the use of signed JavaScript to read and write these preferences. (Alec Plumb / Netscape)

CIAC: I-040: SGI Netscape Navigator Vulnerabilities
Privacy issues with Navigator. Overview and solution.

CIAC: H-76: Netscape Navigator Security Vulnerability
Vulnerability which may allow a Web site operator to retrieve known files from the hard disks of visiting users by mimicking the submission of a form.

Netscape Security Center by VeriSign: Security on the Internet
Articles on vulnerabilities in Netscape software, securing a site and VeriSign services.

Netscape: The Frame-Spoofing Vulnerability
Details the problem and solutions.

CERT Advisory: CA-2000-15 Netscape Allows Java Applets to Read Protected Resources
Provides an overview and workaround of this vulnerability.

CERT Advisory: Inconsistent Warning Messages in Netscape Navigator
A flaw exists in Netscape Navigator that could allow an attacker to masquerade as a legitimate web site if the attacker can compromise the validity of certain DNS information.

"What's Related?" Everything But Your Privacy
In-depth technical article on privacy risks of the Smart Browsing feature.