[MzHN]

This may eventually come to life via Isolated Web Apps https://github.com/WICG/isolated-web-apps/issues/1 or for example via webpackage https://github.com/WICG/webpackage/issues/576

The first step along the way though is making actually secure web apps possible.

Aren't secure web apps already possible? Well, Signal among others thinks otherwise. See the Isolated Web Apps explainer for a full explanation https://github.com/WICG/isolated-web-apps