KernelEx is an Open Source compatibility layer with an aim to allow running Windows 2000 / XP-only applications on Microsoft Windows 98 and Microsoft Windows Millennium operating systems.
https://sourceforge.net/projects/kernelex/files/latest/download?source=files
With this program I was able to watch videos on Youtube and access my Facebook page from a computer with the following configuration:
Processor: AMD K6/III - 400 Mhz; 256 Mb RAM; Savage4 - 16 Mb Video card; Realtek rlt 8136 - 10 Mb/s Network card.
For internet stuff I still use Mozilla Firefox 3.6 on this PC