I've been working on adding code signing to web apps, using Service Workers: http://blog.airbornos.com/post/2017/08/03/Transparent-Web-Apps-using-Service-Worker

I've been working on adding code signing to web apps, using Service Workers: http://blog.airbornos.com/post/2017/08/03/Transparent-Web-Apps-using-Service-Worker http://blog.airbornos.com/post/2017/08/03/Transparent-Web-Ap... The main blocker is https://github.com/w3c/ServiceWorker/issues/1208 https://github.com/w3c/ServiceWorker/issues/1208 (which would fix the non-critical but less-than-ideal issue described under "Service Worker lifecycle" in the blog post).