Shared libraries

No, it used its own display manager. That was pretty snappy but limited.

I think that these days, graphics library problem can be solved by moving the UI into Electron-like shells, with a shared browser layer. And custom native code can be called via IPC. This in theory can provide even more optimizations, like pre-forked initialized shell that can be forked up without waiting for it to load (like the 'zygote' process in Android).

BTW, the browser doesn't have to be Chromium. Servo would be great for this purpose.