Haven't looked into the source, but this is most probably using FuseFS in order to present a mountable filesystem.

Fuse does not support windows. If it did the extension could probably be easy to port..

Your best bet is probably running the browser under some wsl layer.

echoing the sentiment given to linux users every time they ask for a version for their os-- you can just install linux in a vm if you want to use this.

How many of those windows users would want to write a mesh of Python and Bash to interact with their browser?

Not saying it shouldn't support windows, but choosing Linux and MacOS as initial support is a sensible choice...