There was a big kertuffle a few years back where Mozilla made it clear they weren't going to support anything like native client (and they then put a bunch of resources into asm.js).
I don't know if that has changed or not, I don't pay close attention. I only mentioned it because of the "Docker for the client" line, that it already exists is a pretty emphatic yes.
> I only mentioned it because of the "Docker for the client" line,
You're right. I corrected the original comment to make it clearer I'm talking about Firefox. The point was to call out the sandbox argument a bit, since I'm not so sure it's actually safe to run malware in it.
