There is an unstable port of K-Meleon 74 for Windows 2000 that includes the Goanna 2.2 engine, Transport Layer Security (TLS) support, and several fixes from recent Goanna versions. Most web browsers designed for Windows 2000 (and 98) did not support TLS and cannot access modern sites using the HTTPS protocol. This is the most modern web engine that can run on the Windows 2000 and Windows 9X operating systems.

Install K-Meleon 74 for Windows 2000

Windows 98

To run this version of K-Meleon Windows 9X systems like Windows 98, use KernelEx with KernelEx Core Updates 4.5.2016.18 or higher. Run the installer with default options checked and set k-meleon.exe to Win2000SP4. For more information on using KernelEx: http://kernelex.sourceforge.net/wiki/K-Meleon

Retrozilla

Retrozilla is a web browser for Windows 9X forked from an early version of Firefox. It is more stable but less compatible with modern sites. Version 2.2 of Retrozilla includes the TLS updates created by Roytam and used in this unofficial port.