I made a wrapper for a NPAPI plugin for it back in the day.

Back then I was trying to make a decent performing system out of the XO-1. Flash performance on the XO-1 was terrible so sandboxed in-browser native seemed quite appealing.

This video shows some of the things I was working on at the time. https://youtu.be/58UmxHryq8E?t=157 The time offset jumps to the VX32 part.

Looks like it was released in 2008 so you could probably just check the related work section of the nacl paper (which I think waskre recent).