This is amazing. I loaded up https://developer.puter.com/labs/firefox-wasm/ in Chrome and I've visited a bunch of sites, it works really well.

Then I opened up https://developer.puter.com/labs/firefox-wasm/ in Firefox-in-WebAssembly-in-Chrome

... and sadly it didn't load. I got this in the startup log:

  [log] [chrome-demo] chrome assets ready
  [warn] [gecko] warning: unsupported syscall: __syscall_madvise