There's a joint paper (dated 2017, I think) from engineers from Google, Mozilla, Microsoft, and Apple working on WebAssembly [0]
[0] https://blog.acolyer.org/2017/09/18/bringing-the-web-up-to-s...
"Bringing the web up to speed with WebAssembly" [PDF]: https://github.com/WebAssembly/spec/raw/master/papers/pldi20...