for now I get a kernel panic due to NoScript.

But does this support recursion? I'd like to run JSLinux in my browser and then point its Browser to https://www.bellard.org/jslinux/ which then starts another JSLinux which opens the browser on JSLinux which ...

JSLinux isn't another Linux but a landmark of postmodern philosophy, and OP most def forgot to credit Baudrillard.

crazy cool.

If you host your own OS image that auto-starts a browser that runs JSLinux and a config file like https://www.bellard.org/jslinux/alpine-x86.cfg, you can create such a link yourself. CORS may be your biggest enemy, there's no reason JSLinux can't do what you're proposing (albeit extremely slowly).