WebSerial has landed in Firefox Nightly !! 🎉

Enable it in about:config and it all just works as expected. Took a brand new ESP32 and had a new Bluetooth proxy added to Home Assistant within 2 minutes 👌

@balloob I tried https://web-serial-app.netlify.app/ with it - it works now, but the popup for the devices doesn't show except for a short moment, accepting 'test-device-1' - with block or allow. Any ideas? Would be nice to get it working, happy to update it
Web Serial Controller

Connect to any USB or Bluetooth Serial Device from your browser using the Web Serial API Controller

Web Serial Controller
@tanepiper @balloob Hello! Can you confirm that the “dom.webserial.testing.enabled”preference (in about:config) is set to false?